Paloma PH2-20R DVSN Engineering Handbook Download Page 107

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OPERATIONAL PRINCIPLE

Air Intake

Exhaust
Outlet

Hot Water Outlet

Water Inlet

Gas Inlet

(PH2-20RDVS, PH2-25RDVS &
PH2-28RDVS Direct Vent Models)

No.

Name of Parts

No.

Name of Parts

No.

Name of Parts

Hot Water Tap

Solenoid Valve 2

Film Type OHL

Water Flow Servo

Solenoid Valve 3

Fan

Water Flow Sensor

Solenoid Valve 4

Fan Motor

Water Inlet Thermistor

Proportional Gas Control Valve

Drain Valve

Heat Exchanger Thermistor

Orifi ce

Remote Control

Hot Water Outlet Thermistor

Igniter

Freeze Protection Heater

PC Board

Electrode 1

Bypass Solenoid Valve

Water Filter

Flame Rod

Exhaust Outlet

Gas Inlet Solenoid Valve

Main Burner

Flame Rod 2 (ODS)

Solenoid Valve 1

Heat Exchanger

Summary of Contents for PH2-20R DVSN

Page 1: ...IGN CERTIFIED CERTIFIED R Mid Efficiency Models PH2 20R OFN PH2 25R OFN PH2 28R OFN Outdoor Natural Gas Models PH2 20R OFP PH2 25R OFP PH2 28R OFP Outdoor L P Gas Models PH2 20R DVSN PH2 25R DVSN PH2 28R DVSN Indoor Direct Vent Natural Gas Models PH2 20R DVSP PH2 25R DVSP PH2 28R DVSP Indoor Direct Vent L P Gas Models Outdoor Water Heater PH2 20 25 28ROF Indoor Direct Vent Water Heater PH2 20 25 2...

Page 2: ...r Code Diagnostics No Error Code No Hot Water 22 P1 Warning Code 23 1L Warning Code 24 03 Error Code 25 05 Warning Code 26 10 Warning Code 29 11 Error Code 33 Gas Supply Venting 33 Igniter Rod Spark is NOT visible 34 Flame Rod Flame IS visible 36 Gas Control Valve Spark IS visible Flame is NOT visible 38 Control Board 40 12 Error Code 43 Gas Supply Venting 43 Flame Rod s 44 13 Error Code 47 Ventin...

Page 3: ...34 Error Code 66 35 Error Code 68 51 Error Code 70 52 Error Code 72 61 Error Code 74 65 Error Code 76 66 Error Code 78 71 Error Code 80 72 Error Code 82 76 Error Code 84 79 Error Code 86 80 Error Code 88 82 Error Code 90 90 Error Code 91 92 Warning Code 92 93 Error Code 92 99 Error Code 93 ...

Page 4: ... NPT Male Water Connection 3 4 NPT Male Vent Size Mid Efficiency 3 5 Concentric Vent High Efficiency 2 or 3 Two Pipe Venting optional concentric vent termination Max Vent Length See Use Care Manual for each product type Inlet Gas Pressure Natural Gas Minimum 4 0 w c Maximum 10 5 w c L P Gas Minimum 8 0 w c Maximum 14 0 w c Hot Water Supply Temperatures Factory Setting 85F 140F Up to 140 with Overr...

Page 5: ...er is now lit The PCB goes thru a series of calculations input sensing to balance out the cold water temperature the thermostat setting the hot outlet temperature and the BTU required to heat the water The Proportional Gas Flow Regulator continuously adjusts the gas volume in order to maintain the outlet temperature The water flow sensor also adjusts the proper amount of cold water mix flow to sup...

Page 6: ...nds Thermistors Check Blower Speed Flue Blockage Detect Flame False Flame 1 2 Ignition Attempt 31 Inlet Thermistor 33 Outlet Thermistor 32 HE Thermistor 34 Ambient Thermistor 61 90 12 seconds 72 5 seconds 11 2 Ignition Attempts Igniter Rod Off Gas Control Valve Igniter Rod On Blower On Next Page 1 Ignition Sequence SEQUENCE OF OPERATIONS 1 Ignition Sequence 2 Monitoring Sequence 3 Shutdown Sequenc...

Page 7: ...ater temperature too high 16 Hot Water 207 Degrees F for more than 15 seconds 15 Heat Exchanger 207 Degrees F for more than 15 seconds 15 Heat Exchanger Outlet Temp Too Low Ambient Thermistor Outlet Thermistor Heat Exchanger Thermistor Inlet Thermistor 29 34 33 32 31 Trouble with Thermistor s PGFR Gas Control Valve Blower Motor Water Control Body Bypass Assembly 35 52 61 65 66 Gas Control Valve Co...

Page 8: ...kless Gas Trouble Shooting Manual 8 Close Hot Water Tap Checking Blower Motor Detect Flame Gas Control Valve Off Unit in Stand By mode 80 Gas Control Valve 51 Gas Control Valve Yes 8 Seconds Later 99 3 Shutdown Sequence ...

Page 9: ...aintenance Water Heater Has Buildup Of Lime Scale Deposits 1 Flush Heat Exchanger 2 High Altitude Installations ensure proper altitude settings have been made 03 MIC 185 MIC 6 EZ Link 1 Check communications cable connection 2 Check 4 dip switch setting is in the ON position Dip Set 1 Top Dip switch 4 on the water heaters only 05 Maintenance Warning Air Intake Or Vent Exhaust May Be Blocked Unit Wi...

Page 10: ...niter Rod is operational 3 Check igniter Flame Rod s and Igniter Flame Rod s wiring harness for damage 4 Check Control Board 5 Check Flame Rod Status 12 Gas supply Installation Maintenance Flame Failure Had Main Burner Then Lost It 1 Ensure gas type and pressure is correct 2 Bleed all air from gas lines 3 Ensure Flame Rod wire s is connected 4 Check Flame Rod s for carbon build up 5 Ensure gas lin...

Page 11: ...densing maintenance requirements are met 1 Verify U connector is connected to Control Board 2 Verify wiring harness is connected to OHL 3 Check heat exchanger for cracks and or separations 4 Inspect Overheat Wrap Overheat wrap failure Replace unit 5 Check thermal overload sensor condensing models only 15 Maintenance Boiling Safety Device Heat Exchanger temperature reached 207 F degrees for more th...

Page 12: ...ne outside of unit 4 Clean air inlet screen 5 Clean heat exchanger fins If maintenance requirements are met 1 Check neutralizer water level electrode Mid Efficiency Condensing Maintenance Heat Exchanger Temperature Is Too Low Mid Efficiency Condensing 1 Clean air inlet screen 2 Clean heat exchanger fins 31 Inlet Thermistor 1 Check Thermistor wiring for damage 2 Check and clean scale from Thermisto...

Page 13: ...tenance Blower Motor 1 Ensure Blower Motor will turn freely Motor will operate with a small amount of restriction 2 Check wiring harness to Motor for damaged and or loose connections 3 Check venting length not to exceed max lengths and bends 65 Water Control Valve 1 Check Water Control Valve wiring harness for loose or damaged terminals 2 Check for proper voltage to Water Control Valve 66 Water By...

Page 14: ... operate with a small amount of restriction 2 Check Fan Motor for proper voltage and for water condensation damage 80 81 Gas Control Valve 1 Ohm Gas Control Valve 2 Check voltage of all Flame Rods 82 Installation Control Board Is Not Programmed Verify Program Chip is installed 90 Maintenance Installation Blocked Flue Air Intake Clean any blockage in Heat Exchanger Blower Motor inlet flue and exhau...

Page 15: ...eel Heat Exchanger 2 Condensing ONLY Neutralizer 3 Primary Heat Exchanger 4 Flame Rod s 5 Sight Glass 6 Igniter Rod 7 Igniter Coil 8 Gas Control Valve 9 Water Control Valve 10 Water Bypass Valve 11 Control Board 12 Blower Motor Behind Control Board A Heat Exchanger Thermistor B Outlet Thermistor C Inlet Thermistor D Ambient Thermistor C ...

Page 16: ... This can be done while the water heater is in operation While in Maintenance Mode you want to push the up arrow key to select the table you wish to view The table is designated by a letter and is always displayed as the second digit Then push the down arrow key to display the number item in the table you selected You can select as many as 8 readings for each table To perform diagnostics in this s...

Page 17: ...il recent error fault x 10000times Null D Total combustion times until recent error fault x 100 times Null H Total combustion period until recent error fault x 1000 hours Null J Total combustion period until recent error fault x 10 hours Null Y Flame Rod Status GPM Flow Rate GPM Ambient Air Temperature Cold Water Inlet Temperature Heat Exchanger Temperature Hot Water Outlet Temperature Fan Speed x...

Page 18: ...18 Page SVC 820 Tankless Gas Trouble Shooting Manual 18 CONTROL BOARD Color Picture Each letter indicates the connector identifier M T MIN MAX ADJ ...

Page 19: ...essure etc M Flame Rod for all models detects flame T Flame Rod for indoor models only monitors combustion efficiency F Communication port manifold installations A Fuel type and temperature Program Chip U Over Heat Limiter OHL R Thermistors Ambient Inlet Outlet Heat Exchanger Modulating Gas Valve PFGR S Water Flow Sensor C Water Control Valve B Water Bypass Valve V Remote Control Main Bath G Blowe...

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Page 21: ...Control will flash briefly 6 You can operate unit CLEARING FAULT HISTORY PROCEDURE 1 Turn unit OFF Remove Front Cover Locate the Dip Switches on the Control Board 2 Make sure all the Dip Switches are OFF down position 3 Locate the 1 Dip Switch and turn it ON up position then immediately turn it off 4 Within 5 seconds press and hold the MIN and MAX button for at least 2 seconds 5 The Remote Control...

Page 22: ...supply ON check the nearest hot water fixture for hot water If you have hot water then the unit needed to be reset 2 Water flow might be too low Open multiple hot water fixtures If unit fires then there is not enough water flow to engage the unit at a particular fixture Check your fixture aerator screen s for debris Clean if necessary 3 Your water lines might be crossed Make sure your hot and cold...

Page 23: ...t on Turn the water supply to the unit on and check the nearest hot water fixture for hot water If you have hot water then the unit needed to be reset Your water lines might be crossed Make sure your hot and cold water supply lines are connected to the appropriate hot and cold water connections on the unit Water flow might be too low Open multiple hot water fixtures If unit fires then there is not...

Page 24: ...main water supply valve to the tankless water heater Consult the instructions provided by the isolation valve manufacturer for specifics in using their valve assemblies 3 Attach a small garden hose on each drain valve Connect the cold water hose to the output of a small circulation pump A pond pump or similar model can be used for this application 4 Pour approximately five gallons of virgin food g...

Page 25: ...Link MIC 6 or MIC 185 Explanation Communication failure between water heaters remote control and or manifold controller Diagnostic Checks DIP1 Setting On Main Control Board PCB DIP 1 SETTING Manifold units only DIP 1 switch 4 must be in the ON position for each unit Check ALL Molex connections on ALL Control Boards ...

Page 26: ... GAS SUPPLY VENTING Dip 2 Setting On Printed Circuit Board PCB GAS SUPPLY VENTING REFER TO USE CARE MANUAL Make sure you have sufficient fuel for the unit to operate properly 1 Gas Type LP or Natural Gas 2 Gas Pressure 3 Gas Pipe Size 4 Gas Flex Line Not To Exceed 36 In Length Has The Proper ID Inside Diameter Correct BTU Rating 5 Gas Regulator 6 Gas Shut Off Valves 7 Air In Gas Line Visually insp...

Page 27: ...kless Gas Trouble Shooting Manual Page 27 27 DIP 2 SETTING Locate the two DIP switches at top right of PCB Switch labeled DIP 2 is the bottom switch DO NOT ALTER ANY OTHER SWITCHES 1 Sea Level to 3 280 Feet 3 2 4 ...

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Page 29: ...PPLY VENTING Blower Motor GAS SUPPLY VENTING REFER TO USE CARE MANUAL Make sure you have sufficient fuel for the unit to operate properly 1 Gas Type LP or Natural Gas 2 Gas Pressure 3 Gas Pipe Size 4 Gas Flex Line Not To Exceed 36 In Length has the proper ID Inside Diameter and correct BTU rating 5 Gas Regulator 6 Gas Shut Off Valves 7 Air In Gas Line Visually inspect venting for possible blockage...

Page 30: ... 3 screws holding Blower Motor in place Clean Blower Motor and reassemble unit Attempt to operate unit again IF 10 Warning Code does NOT display Blower Motor needed to be cleaned Turn power OFF Remove 3 screws for Control Board mounting bracket Remove connectors M T G Pull PCB out of way to access Blower Motor Locate Min Max buttons on Control Board Continue to diagnostic chart on next page 3 2 4 ...

Page 31: ...vate the Blower Motor While Blower Motor is running test DC voltage across black and white wires on connector G 12 18 DC VOLTS Press and hold down MAX button on Control Board to activate the blower motor While blower is running test DC voltage across black and blue wires on connector G 4 10 DC VOLTS Remove and reinsert connector G at Control Board Attempt to operate unit again IF unit continues to...

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Page 33: ... SUPPLY VENTING Diagnostic Checks GAS SUPPLY VENTING Igniter Rod Flame Rod s Gas Control Valve GAS SUPPLY VENTING REFER TO USE CARE MANUAL Make sure you have sufficient fuel for the unit to operate properly 1 Gas Type LP or Natural Gas 2 Gas Pressure 3 Gas Pipe Size 4 Gas Flex Line Not To Exceed 36 In Length has the proper ID Inside Diameter and correct BTU rating 5 Gas Regulator 6 Gas Shut Off Va...

Page 34: ... Remove and reinsert Igniter Coil cable on Igniter Rod Turn power ON Remove and reinsert white Molex connector at Igniter Coil mounted on right side of unit While unit is attempting to ignite determine IF spark is visible through sight glass IF YES unit had a loose connection IF NO continue to diagnostic chart on next page 3 2 4 Igniter Rod Sight Glass Igniter Coil ...

Page 35: ... across Igniter Coil cable and Igniter Rod Remove Igniter Coil cable from Igniter Rod While unit is attempting to ignite hold end of Igniter Coil cable 1 8 from end of Igniter Rod Make sure you hold Igniter Coil cable on the rubber insulation while performing this check Remove Igniter Rod and clean Reconnect Igniter Coil cable and Igniter Rod Attempt to operate unit again NO Is spark visible throu...

Page 36: ... flame is touching Flame Rod s IF NO remove any foreign debris IF foreign debris NOT present CHECK GAS SUPPLY VENTING Remove and reinsert terminals on Flame Rods s Attempt to operate unit again IF 11 Error Code does NOT display unit had a loose connection On Remote Control go to Maintenance Mode 0Y table For Maintenance Mode instructions go to page 16 Continue to diagnostic chart on next page 3 2 ...

Page 37: ...de 11 Replace Control Board Is Flame Rod s detecting flame Cycle unit ON while in Maintenance Mode check Flame Rod status under table 0Y IF detecting flame Maintenance Mode will display Indoor Models 05 Outdoor Models 01 Attempt to operate unit again If the unit malfunctions due to an Error Code 11 Flame Rod s are OK CHECK GAS VENTING GROUND Remove and clean Flame Rod s Attempt to operate unit aga...

Page 38: ...rd 1 Locate PGFR valve on lower right of unit Remove and reinsert Molex connector with red wire and Molex connector with black wire on PGFR Attempt to operate unit again Remove and reinsert connector R on Control Board IF 11 Error Code does NOT display unit had a loose connection IF 11 Error Code IS displayed continue to diagnostic chart on next page 3 2 4 PGFR Molex Connectors ...

Page 39: ... DC voltage OK Attempt to operate unit again IF the unit malfunctions due to an Error Code 11 Replace Control Board Is the resistance OK Turn unit OFF remove Molex connector R Measure resistance across red wire 1 and black wire 2 on Molex connector R 40 80 Ohms PGFR is OK Continue to next page Remove and reconnect terminals on PGFR Attempt to operate unit again IF unit malfunctions due to Error Co...

Page 40: ...ck wire 6 and blue wire 4 on connector K 0 8k 2 4k Ohms Measure resistance across black wire 6 and white wire 2 on connector K 0 8k 2 4k Ohms Measure resistance across black wire 6 and grey wire 3 on connector K 0 8k 2 4k Ohms Is the resistance OK YES YES Is the resistance OK YES Is the resistance OK YES Is the resistance OK NO NO NO NO Gas Control Valve is OK Continue to next page Turn unit OFF a...

Page 41: ...voltage across black wire 6 and white wire 2 on connector K 90 120 DC Volts Measure DC voltage across black wire 6 and grey wire 3 on connector K 90 120 DC Volts Is the voltage OK YES YES Is the voltage OK YES Is the voltage OK YES Is the voltage OK Control Board is OK IF all components tested OK CHECK GAS VENTING GROUND All voltage checks must be performed while unit is attempting to go to main b...

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Page 43: ...L Make sure you have sufficient fuel for the unit to operate properly 1 Gas Type LP or Natural Gas 2 Gas Pressure 3 Gas Pipe Size 4 Gas Flex Line Not To Exceed 36 In Length has the proper ID Inside Diameter and correct BTU rating 5 Gas Regulator 6 Gas Shut Off Valves 7 Air In Gas Line Visually inspect venting for possible blockage and or recirculation of exhaust 1 Approved Venting Materials 2 Appr...

Page 44: ...f flame is touching Flame Rod s IF NO remove any foreign debris IF foreign debris NOT present CHECK GAS SUPPLY VENTING Remove and reinsert terminals on Flame Rod s Attempt to operate unit again IF 11 Error Code does NOT display unit had a loose connection On Remote Control go to Maintenance Mode 0Y table For Maintenance Mode instructions go to page 16 Continue to diagnostic chart on next page 3 2 ...

Page 45: ...Code 12 Replace Control Board Is Flame Rod s detecting flame Cycle unit ON while in Maintenance Mode check Flame Rod s status under table 0Y IF detecting flame Maintenance Mode will display Indoor Models 05 Outdoor Models 01 Attempt to operate unit again IF the unit malfunctions due to an Error Code 12 Flame Rods s are OK CHECK GAS VENTING GROUND Remove and clean Flame Rod s Attempt to operate uni...

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Page 47: ... on page 21 First Check VENTING Primary cause is blockage of the Fresh Air Intake Vent Diagnostic Checks VENTING Ground Connection Flame Rod FL 2 GROUND CONNECTION DIAGNOSTICS VENTING REFER TO USE CARE MANUAL Visually inspect venting for possible blockage and or recirculation of exhaust 1 Approved Venting Materials 2 Approved Vent Terminations 3 Vent Lengths 4 Location Of Vent Termination Recircul...

Page 48: ...f flame is touching Flame Rod s IF NO remove any foreign debris IF foreign debris NOT present CHECK GAS SUPPLY VENTING Remove and reinsert terminals on Flame Rod s Attempt to operate unit again IF 11 Error Code does NOT display unit had a loose connection On Remote Control go to Maintenance Mode 0Y table For Maintenance Mode instructions go to page 16 Continue to diagnostic chart on next page 3 2 ...

Page 49: ... Replace Control Board Is Flame Rod s detecting flame Cycle unit ON while in Maintenance Mode check Flame Rod s status under table 0Y IF detecting flame Maintenance Mode will display Indoor Models 05 Outdoor Models 01 Attempt to operate unit again If the unit malfunctions due to an Error Code 13 Flame Rod s are OK Unit operation is normal CHECK VENTING Remove and clean Flame Rod s Attempt to opera...

Page 50: ...ch OHL DIAGNOSTICS Mid Efficiency ONLY IF 14 Error Code does NOT display unit had a loose connection IF 14 Error Code IS displayed continue to diagnostic chart on next page Turn power OFF Remove and reinsert white connector U on Control Board white Molex with 2 white wires Attempt to operate unit again 1 2 3 High Efficiency ONLY IF 14 Error Code does NOT display unit had a loose connection IF 14 E...

Page 51: ...tures This is normally caused by inadequate wrong GAS SUPPLY or inadequate VENTING Check GAS SUPPLY VENTING Unit had a loose connection operation appears to be normal NO YES YES NO Is the resistance to the OHL OK Did the unit shut down due to Error Code 14 Reconnect the Molex attempt to operate unit again Replace Control Board Is this a High Efficiency Unit Mid Efficiency Unit ONLY Replace Unit NO...

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Page 53: ...URE SENSOR DIAGNOSTICS Go to Error Code 32 for Heat Exchanger Temperature Sensor diagnostic instructions GAS SUPPLY VENTING REFER TO USE CARE MANUAL Make sure you have sufficient fuel for the unit to operate properly 1 Gas Type LP or Natural Gas 2 Gas Pressure 3 Gas Pipe Size 4 Gas Flex Line Not To Exceed 36 In Length has the proper ID Inside Diameter and correct BTU rating 5 Gas Regulator 6 Gas S...

Page 54: ...in IF 16 Error Code does NOT display unit had a loose connection IF resistance tested OK and 16 Error Code IS displayed go to Error Code 66 for Water Bypass Valve diagnostics IF resistance NOT OK go to step 2 Turn power OFF Remove 3 screws for Control Board mounting bracket Remove connectors M T G Pull control board out of way to access BLACK Molex for Outlet Thermistor located near the Blower Mot...

Page 55: ...rness for connector R on Control Board NO YES YES NO Is the resistance to the Outlet Thermistor OK Is the continuity across all wires OK Remove Molex from connector R at Control Board Check continuity from black 3 wire at Molex connector R and black wires on black Molex located behind Control Board Check continuity from red 4 wire at Molex connector R and red wire on black Molex located behind Con...

Page 56: ...l displayed after releasing Remote Control buttons continue to Remote Control diagnostics Diagnostic Checks Remote Control REMOTE CONTROL DIAGNOSTICS Visually inspect Remote Control wiring for damaged or loose terminals 1 Turn power OFF Remove and reconnect Remote Control wiring terminals at bottom of unit Attempt to operate unit again IF 24 Error Code does NOT display unit had a loose connection ...

Page 57: ... wires from wiring terminals on bottom of unit Use a new short piece of wire to connect the Remote Control directly to the Remote Control Wiring Terminals located at bottom of unit Plug unit in and open a hot water source Did the unit display Error Code 24 The wiring is defective Replace Remote Control wiring Replace Remote Control ...

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Page 59: ...hecks Plug not removed from condensate drain Pinch in condensate drain line Blockage in condensate drain line Drain line has unnecessary P trap CONDENSATE DRAIN DIAGNOSTICS Ensure you removed the condensate protection plug located at bottom of unit 1 Check your condensate drain line for internal or external blockage Make sure drain line is NOT pinched 2 Drain Line ...

Page 60: ... Thermistor located near the Blower Motor Turn power OFF Remove connector R on Control Board Measure resistance between Black 3 white 6 wires 7K 23K Ohms IF OK attempt to operate unit again IF 31 Error Code does NOT display you had a loose connection 1 2 3 Separate top and bottom of WHITE Molex for the Inlet Thermistor Top of Molex has 2 black wires and 1 white wire Bottom of Molex has 2 white wir...

Page 61: ... Thermistor Replace wiring harness for Connector R on Control Board YES YES Is the resistance to the Inlet Thermistor OK Is the continuity across all wires OK Remove Molex from connector R at Control Board Check continuity from black 3 wire at Molex connector R and black wires at White Molex located behind Control Board Check continuity from white 6 wire at Molex connector R and white wire at Whit...

Page 62: ...tor located near the Blower Motor Turn power OFF Remove connector R on Control Board Measure resistance between Black 3 Yellow 5 wires 7K 23K Ohms IF OK attempt to operate unit again IF 32 Error Code does NOT display unit had a loose connection 1 2 3 Separate top and bottom of YELLOW Molex for Heat Exchanger Thermistor Top of Molex has 2 black wires and 1 yellow wire Bottom of Molex has 2 white wi...

Page 63: ...Replace Heat Exchanger Thermistor NO YES YES NO Is the resistance to the Heat Exchanger Thermistor OK Is the continuity across all wires OK Remove Molex from connector R at Control Board Check continuity from black 3 wire at Molex connector R and black wire at Yellow Molex located behind Control Board Check continuity from Yellow 5 wire at Molex connector R and Yellow wire at Yellow Molex located ...

Page 64: ...utlet Thermistor located near the Blower Motor Turn power OFF Remove connector R on Control Board Measure resistance between Black 3 Red 4 wires 7K 23K Ohms IF OK attempt to operate unit again IF 33 Error Code does NOT display unit had a loose connection 1 2 3 Separate top and bottom of BLACK Molex for Outlet Thermistor Top of Molex has 2 black wires and 1 red wire Bottom of Molex has 2 black wire...

Page 65: ...ermistor Replace wiring harness for Connector R on Control Board NO YES YES NO Is the resistance to the Outlet Thermistor OK Is the continuity across all wires OK Remove Molex from Connector R at Control Board Check continuity from black 3 wire at Connector R Molex and black wires at black Molex located behind Control Board Check continuity from red 4 wire at Connector R Molex and red wire at Blac...

Page 66: ... OFF Remove connector R on Control Board Measure resistance between Black 3 Blue 7 wires Refer to Data Table for resistance value IF OK attempt to operate unit again IF 34 Error Code does NOT display unit had a loose connection 1 2 3 Separate top and bottom of BLUE Molex for Ambient Thermistor Top of Molex has 2 black wires and 1 blue wire Bottom of Molex has 2 black wires Continue to Diagnostic C...

Page 67: ...Thermistor NO YES YES NO Is the resistance to the Ambient Thermistor OK Is the continuity across all wires OK Remove Molex from Connector R at Control Board Check continuity from black 3 wire at Molex connector R and black wires at Blue Molex located behind Control Board Check continuity from blue 7 wire at Molex connector R and blue wire at Blue Molex located behind Control Board Attempt to opera...

Page 68: ...istance check go to the appropriate Error Code for diagnostics IF sensors test OK continue to next page Turn power OFF Remove and reinsert connector R on Control Board Attempt to operate unit again IF 35 Error Code does NOT display unit had a loose connection 1 2 3 Black 3 Blue 7 Wires Ambient Thermistor 64DV 84DV 95DV 7K 23K Ohms 64X 84X 95X 2K 72K Ohms H95DV H95X 2K 72K Ohms Black 3 White 6 Wire...

Page 69: ...OK Go to appropriate Sensor Error Code to diagnose 1 Inlet Error Code 31 2 Heat Exchanger Error Code 32 3 Outlet Error Code 33 4 Ambient Error Code 34 Did the unit lockout on Error Code 35 Attempt to operate the unit again Replace Control Board The water heater appears to be operating normally Ambient Thermistor Data Table 64DV 84DV 95DV 7K 23K Ohms 64X 84X 95X 2K 72K Ohms H95DV H95X 2K 72K Ohms ...

Page 70: ...trol Valve FLAME RODS GAS VALVE DIAGNOSTICS Remove and reinsert terminals on Fame Rod s Attempt to operate unit again IF 51 Error Code does NOT display unit had a loose connection Turn power OFF Remove and reinsert white connector M and blue connector T on Control Board 1 2 3 Indoor Models ONLY 2 Flame Rods Visually inspect Gas Control Valve wiring harnesses for loose connections or damaged wiring...

Page 71: ...Rods s Cycle the water heater 3 times by turning unit on off on off on off Does OY Status in Maintenance Mode indicate presence of flame after 5 seconds Does OY Status in Maintenance Mode indicate presence of flame after 5 seconds YES Attempt to operate unit again If the unit malfunctions due to an Error Code 51 Replace Control Board On Remote Control go to Maintenance Mode 0Y table For Maintenanc...

Page 72: ... DIAGNOSTICS Locate PGFR valve on lower right of unit Remove and reinsert Molex connector with red wire and Molex connector with black wire on PGFR Attempt to operate unit again Turn power OFF Remove and reinsert connector R on Control Board 1 2 3 IF 52 Error Code does NOT display unit had a loose connection IF 52 Error Code IS displayed continue to diagnostic chart on next page PGFR Control Board...

Page 73: ... VOLTS Is the DC voltage OK Attempt to operate unit again If the unit malfunctions due to an Error Code 52 Replace Control Board Is the DC voltage OK While unit is attempting to go to main burner check DC voltage across red and black wires at PGFR 1 5 14 DC VOLTS Attempt to operate unit again If the unit malfunctions due to an Error Code 52 Replace Gas Control Valve Replace wiring harness for Conn...

Page 74: ...F Remove 3 screws for Control Board mounting bracket Remove connectors M T G Pull Control Board out of way to access Blower Motor Turn power OFF Remove and reinsert connector G on Control Board Attempt to operate unit again IF 61 Error Code does NOT display unit had a loose connection Remove 3 screws holding Blower Motor in place Clean Blower Motor and reassemble unit Attempt to operate unit again...

Page 75: ...n Control Board to activate Blower Motor While Blower is running test DC voltage across black and white wires on Molex connector G 12 18 DC VOLTS Press and hold down MAX button on Control Board to activate Blower Motor While Blower is running test DC voltage across black and blue wires on Molex connector G 4 10 DC VOLTS Remove and reinsert connector G Attempt to operate unit again If the unit malf...

Page 76: ... access Water Control Valve Turn power OFF Remove and reinsert connector C on Control Board Attempt to operate unit again IF 65 Error Code does NOT display unit had a loose connection 1 2 3 Visually inspect Water Control Valve wiring harness for loose or damaged terminals It is located right of the Blower Motor connected directly to the water inlet Reassemble unit and continue to diagnostic chart ...

Page 77: ...wer to unit OFF then ON again and turn water flow on Check DC Voltage across Red Black Wires at connector C 8 16 DC VOLTS Turn power to unit OFF then ON again and turn water flow on Check DC Voltage across Green Black Wires at connector C 4 6 DC VOLTS Attempt to operate unit again If the unit malfunctions due to an Error Code 65 Replace Control Board Is the DC voltage OK NO Attempt to operate unit...

Page 78: ...ectors M T G Pull Control Board out of way to access Water Bypass Valve Turn power OFF Remove and reinsert connector B on Control Board Attempt to operate unit again IF 66 Error Code does NOT display unit had a loose connection 1 2 3 Visually inspect Water Bypass Valve wiring harness for loose or damaged terminals It is located right of the Blower Motor below two copper pipes Reassemble unit and c...

Page 79: ...operate unit again If the unit malfunctions due to an Error Code 66 Replace Control Board Is the DC voltage OK While Water Bypass Valve is operating water is flowing check DC voltage across red and black wires at Water Bypass Valve wiring harness 8 16 DC VOLTS Attempt to operate unit again If the unit malfunctions due to an Error Code 66 Replace Water Bypass Valve Attempt to operate unit again If ...

Page 80: ...AGNOSTICS Turn power OFF Remove and reinsert connector K on Control Board Attempt to operate unit again IF 71 Error Code does NOT display unit had a loose connection 1 Visually inspect Gas Control Valve wiring harnesses for loose or damaged terminals Gas Control Valve is located on lower right side of unit Continue to diagnostic chart on next page 2 Gas Control Valve ...

Page 81: ...nite check DC voltage across yellow and black wires on Molex connector K 75 100 DC VOLTS Is the DC voltage OK Attempt to operate again If the unit malfunctions due to an Error Code 71 Replace Control Board Reset the water heater and attempt to operate again If the unit malfunctions due to an Error Code 71 Replace Gas Control Valve ...

Page 82: ...emove and reinsert terminals on Flame Rod s Attempt to operate unit again IF 72 Error Code does NOT display unit had a loose connection Turn power OFF Remove and reinsert white connector M and blue connector T on Control Board 1 2 Flame Rod s Indoor Units ONLY 2 Flame Rods Visually inspect Gas Control Valve wiring harnesses for loose connections or damaged wiring Gas Control Valve is located on lo...

Page 83: ... Unplug unit Disconnect Molex connector s from Flame Rod s Plug unit in Turn power ON Turn water flow ON to begin ignition sequence Does OY Status in Maintenance Mode indicate presence of flame Does OY Status in Maintenance Mode indicate presence of flame YES Attempt to operate again If unit displays 72 Error Code Replace Control Board On Remote Control go to Maintenance Mode 0Y table For Maintena...

Page 84: ...REMOTE THERMOSTAT DIAGNOSTICS Visually inspect Remote Control wiring for damaged or loose terminals 1 Turn power OFF Remove and reconnect Remote Control wiring terminals at bottom of unit Attempt to operate unit again IF 76 Error Code does NOT display unit had a loose connection IF 76 Error Code IS displayed continue to diagnostic chart on next page 2 Hot Water Outlet Cold Water Inlet Remote Contr...

Page 85: ...e Did the unit go to main burner Attempt to operate unit again If the unit malfunctions due to an Error Code 76 Replace Remote Control Did the unit go to main burner Unplug unit Use a short piece of new thermostat wire to connect the Remote Control directly to Remote Control wiring terminals at bottom of unit Plug unit in and open a hot water source The wiring is defective Replace Remote Control w...

Page 86: ... 3 screws for Control Board mounting bracket Remove connectors M T G Pull Control Board out of way to access Blower Motor Turn power OFF Remove and reinsert connector G on Control Board Attempt to operate unit again IF 79 Error Code does NOT display unit had a loose connection Remove 3 screws holding Blower Motor in place Clean Blower Motor and reassemble unit Attempt to operate unit again IF 79 E...

Page 87: ...n Control Board to activate Blower Motor While Blower is running test DC voltage across black and white wires on Molex connector G 12 18 DC VOLTS Press and hold down MAX button on Control Board to activate Blower Motor While Blower is running test DC voltage across black and blue wires on Molex connector G 4 10 DC VOLTS Remove and reinsert connector G Attempt to operate unit again If the unit malf...

Page 88: ...FLAME ROD s GAS CONTROL VALVE DIAGNOSTICS Remove and reinsert terminals on Flame Rod s Attempt to operate unit again IF 80 Error Code does NOT display unit had a loose connection Turn power OFF Remove and reinsert white connector M and blue connector T on Control Board 1 2 3 Sight Glass Gas Control Valve Visually inspect Gas Control Valve wiring harnesses for loose connection or damaged wiring Gas...

Page 89: ...ector from Flame Rod s Cycle heater 3 times by turning unit on off on off on off Does OY Status in Maintenance Mode indicate presence of flame after 5 seconds Does OY Status in Maintenance Mode indicate presence of flame after 5 seconds YES Attempt to operate unit again If unit displays 80 Error Code Replace Control Board On Remote Control go to Maintenance Mode 0Y table For Maintenance Mode instr...

Page 90: ... Board Program Chip malfunction Diagnostic Checks Program Chip PROGRAM CHIP DIAGNOSTICS Turn power OFF Verify you have a Program Chip inserted in connector A 1 Remove and reinsert Program Chip Attempt to operate unit again IF unit does NOT display 82 Error Code unit had a loose connection 2 ...

Page 91: ... Code will occur BEFORE unit goes to ignition Possible Causes VENTING VENTING REFER TO USE CARE MANUAL Visually inspect venting for possible blockage and or recirculation of exhaust 1 Approved Venting Materials 2 Approved Vent Terminations 3 Vent Lengths 4 Location Of Vent Termination Recirculation of exhaust 5 Blocked Venting 6 Venting Not Sealed Properly ...

Page 92: ...3 REPLACE NEUTRALIZER ASAP Once Neutralizer is replaced follow reset procedures on page 21 93 Error Code Explanation High Efficiency Condensing Units ONLY Unit will NOT operate until the Neutralizer Medium is replaced REPLACE NEUTRALIZER IMMEDIATELY Neutralizer rocks made from Calcium Carbonate CACO3 Neutralizer Kit may be ordered through Rheem Supplier Once Neutralizer is replaced follow reset pr...

Page 93: ...FF This error code will only occur at time of shut down Unit must be reset by performing reset procedure on page 21 Possible Causes Venting VENTING REFER TO USE CARE MANUAL Visually inspect venting for possible blockage and or recirculation of exhaust 1 Approved Venting Materials 2 Approved Vent Terminations 3 Vent Lengths 4 Location Of Vent Termination Recirculation of exhaust 5 Blocked Venting 6...

Page 94: ..._____________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ _________________________________...

Page 95: ..._____________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ _________________________________...

Page 96: ...ent Natural Gas Models PHH 25RDVP PHH 32RDVP Indoor Direct Vent L P Gas Models Mid Efficiency Models PH2 20ROFN PH2 25ROFN PH2 28ROFN Outdoor Natural Gas Models PH2 20ROFP PH2 25ROFP PH2 28ROFP Outdoor L P Gas Models PH2 20RDVSN PH2 25RDVSN PH2 28RDVSN Indoor Direct Vent Natural Gas Models PH2 20RDVSP PH2 25RDVSP PH2 28RDVSP Indoor Direct Vent L P Gas Models Second Section Information Guide 96 ...

Page 97: ...s supplier WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death WARNING Improper installation adjustment alternation service or maintenance can cause property damage personal injury or death For assistance or additional information consult with a qualified distributor WARNING The content on this man...

Page 98: ...nge 85ºF 120ºF 140ºF Residential Adjusting Range 85ºF 185ºF Commercial By conversion kit Max Setting W Main Remote Control UMC 117 Adjustment Electrical Portion Electrical Rating 120VAC 60Hz Less than 2 Amps Power Supply Cord 3 Pin Power Supply Cord 10 Feet Direct Vent Safety Devices Oxygen Depletion Safety Sensing Burner Direct Vent Over Heat Limiter Film Type for Entire Heat Exchanger Flame Fail...

Page 99: ...ed maximum pressure Hot Water Supply Adjusting Range 85ºF 120ºF 140ºF Residential Adjusting Range 85ºF 185ºF Commercial By conversion kit Max Setting W Main Remote Control UMC 117 Adjustment Electrical Portion Electrical Rating 120VAC 60Hz Less than 2 Amps Power Supply Cord 3 Pin Power Supply Cord 10 Feet Direct Vent Safety Devices Oxygen Depletion Safety Flame Rod Direct Vent Over Heat Limiter Fi...

Page 100: ...mm 3 8 10 mm Hot Water Outlet Connection 3 4 NPT M Water Inlet Connection 3 4 NPT M Gas Connection 3 4 NPT F W Supplied Gas Shutoff Valve For Power Cord For Remote Control Connection PH2 20ROF PH2 25ROF PH2 28ROF Outdoor Models 13 7 8 350 mm 12 15 16 328 mm 5 1 8 130 mm 3 5 Concentric 9 7 16 240 mm 5 1 8 131 mm 3 8 1 9 16 10 40 mm Hot Water Outlet Connection 3 4 NPT M Water Inlet Connection 3 4 NP...

Page 101: ...on 3 4 NPT F W Supplied Gas Shutoff Valve Water Inlet Connection 3 4 NPT M For Power Cord For Remote Control Connection 2 1 4 57 mm Drain Outlet 7 1 2 191 mm 3 3 4 96 mm 6 11 16 170 mm 2 7 8 73 mm 3 7 16 88 mm 2 7 8 72 mm 9 16 15 mm 7 1 2 190 mm 2 1 4 57 mm 4 3 16 106 mm 2 1 16 52 mm 18 1 2 470 mm 17 3 4 451 mm 9 7 17 240 mm 3 8 10 mm 3 4 18 5 mm 26 7 16 672 mm 27 1 2 700 mm 30 1 2 775 mm Hot Wate...

Page 102: ...ard 3 Lower Burner Assy 13 Heat Transfer Coil 23 Fan Assembly 4 Flame Rod 14 Fin 24 Heat Exchanger Thermistor 5 Main Burner 15 Turbulence Coil 25 Igniter 6 Inner Case 16 U Pipe 26 Electrode IG 7 Exhaust Flue Assy 17 Hot Water Supply Coil 27 Front Cover 8 Water Inlet Connection 18 Hot Water Supply Pipe 28 Back Cover 9 Water Control Valve Assy 19 Hot Water Outlet Connection 29 Junction Box 10 Water ...

Page 103: ...13 Heat Transfer Coil 23 PC Board 4 Flame Rod 14 Fin 24 Fan Assembly 5 Main Burner 15 Turbulence Coil 25 Electrode IG 6 Inner Case 16 U Pipe 26 Igniter 7 Exhaust Flue Assy 17 Hot Water Supply Coil 27 Back Cover 8 Water Inlet Connection 18 Hot Water Supply Pipe 28 Front Cover 9 Water Control Valve Assy 19 Hot Water Outlet Connection 10 Water Supply Pipe 20 Drain Valve PH2 20RDVS PH2 25RDVS PH2 28RD...

Page 104: ...Pipe 3 Heat Exchanger 13 Film Type OHL 23 Bypass Pipe 4 Fin 14 Igniter 24 Turbulence Coil 5 Heat Transfer Coil 15 PC Board 25 Hot Water Supply Coil 6 Inner Case 16 Electrode FL 1 26 Hot Water Supply Pipe 7 Exhaust Flue Assy 17 Electrode IG 27 Hot Water Outlet Connection 8 Second Heat Exchanger Top Plate Assy 18 Gas Connection 28 Drain Valve 9 Second Heat Exchanger 19 Lower Burner Assy 10 Main Burn...

Page 105: ...ss Pipe 4 Fin 14 Igniter 24 Turbulence Coil 5 Heat Transfer Coil 15 Electrode FL 2 25 Hot Water Supply Coil 6 Inner Case 16 Electrode FL 1 26 Hot Water Supply Pipe 7 Exhaust Flue Assy 17 Electrode IG 27 Hot Water Outlet Connection 8 Second Heat Exchanger Top Plate Assy 18 Gas Connection 28 Drain Valve 9 Second Heat Exchanger 19 Lower Burner Assy 29 PC Board 10 Main Burner 20 Water Inlet Connection...

Page 106: ...istor 14 Proportional Gas Control Valve 24 Drain Valve 5 Heat Exchanger Thermistor 15 Orifice 25 Remote Control 6 Hot Water Outlet Thermistor 16 Igniter 26 Freeze Protection Heater 7 PC Board 17 Electrode 27 Bypass Solenoid Valve 8 Water Filter 18 Flame Rod 28 Exhaust Outlet 9 Gas Inlet Solenoid Valve 19 Main Burner 10 Solenoid Valve 1 20 Heat Exchanger Hot Water Outlet Water Inlet Gas Inlet Exhau...

Page 107: ...Solenoid Valve 3 22 Fan 3 Water Flow Sensor 13 Solenoid Valve 4 23 Fan Motor 4 Water Inlet Thermistor 14 Proportional Gas Control Valve 24 Drain Valve 5 Heat Exchanger Thermistor 15 Orifice 25 Remote Control 6 Hot Water Outlet Thermistor 16 Igniter 26 Freeze Protection Heater 7 PC Board 17 Electrode 1 27 Bypass Solenoid Valve 8 Water Filter 18 Flame Rod 28 Exhaust Outlet 9 Gas Inlet Solenoid Valve...

Page 108: ...open or close the Solenoid Valve 1 10 Solenoid Valve 2 11 Solenoid Valve 3 12 and Solenoid Valve 4 13 and also the Proportional Gas Control Valve 14 continuously adjusts the gas volume in order to maintain the outlet temperature from the Heat Exchanger 20 The Water Flow Servo 2 also adjusts the proper amount of water flow to supply a stable hot water temperature at all times 6 According to the adj...

Page 109: ...onal Gas Control Valve 24 Drain Valve 5 Heat Exchanger Thermistor 15 Orifice 25 Remote Control 6 Hot Water Outlet Thermistor 16 Igniter 26 Freeze Protection Heater 7 PC Board 17 Electrode 27 Bypass Solenoid Valve 8 Water Filter 18 Flame Rod 28 Exhaust Outlet 9 Gas Inlet Solenoid Valve 19 Main Burner 29 Second Heat Exchanger 10 Solenoid Valve 1 20 Primary Heat Exchanger PHH 25ROF PHH 32ROF Outdoor ...

Page 110: ...nlet Thermistor 14 Proportional Gas Control Valve 24 Drain Valve 5 Heat Exchanger Thermistor 15 Orifice 25 Remote Control 6 Hot Water Outlet Thermistor 16 Igniter 26 Freeze Protection Heater 7 PC Board 17 Electrode 27 Bypass Solenoid Valve 8 Water Filter 18 Flame Rod 1 28 Exhaust Outlet 9 Gas Inlet Solenoid Valve 19 Main Burner 29 Flame Rod 2 ODS 10 Solenoid Valve 1 20 Primary Heat Exchanger 30 Se...

Page 111: ... judges it and open or close the Solenoid Valve 1 10 Solenoid Valve 2 11 Solenoid Valve 3 12 and Solenoid Valve 4 13 and also the Proportional Gas Control Valve 14 continuously adjusts the gas volume in order to maintain the outlet temperature The Water Flow Servo 2 also adjusts the proper amount of water flow to supply a stable hot water temperature at all times 6 According to the adjustment of t...

Page 112: ...e is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 60 F PH2 20R Water Flow Rate GPM Outlet Temperature F 90 110 0 40 GPM When maximum temperature is set at 140 F When maximum temperature is set at 120 F 6 4 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 70 F PH2 20R Water Flow Rate GPM Out...

Page 113: ...e is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 60 F PH2 25R Water Flow Rate GPM Outlet Temperature F 90 110 0 40 GPM When maximum temperature is set at 140 F When maximum temperature is set at 120 F 8 4 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 70 F PH2 25R Water Flow Rate GPM Out...

Page 114: ...t at 120 F 8 4 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperature 60 F PH2 25R Commercial Setting Water Flow Rate GPM Outlet Temperature F 150 160 170 180 185 85 When maximum temperature is set at 185 F When maximum temperature is set at 120 F 0 40 GPM 8 4 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperatur...

Page 115: ...F 90 110 0 40 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 60 F PH2 28R Water Flow Rate GPM Outlet Temperature F 90 110 9 5 GPM When maximum temperature is set at 140 F When maximum temperature is set at 120 F 0 40 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 70 F PH2 28R Water Flow Rate GPM Out...

Page 116: ...re is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperature 60 F PH2 28R Commercial Setting Water Flow Rate GPM Outlet Temperature F 150 160 170 180 185 85 0 40 GPM 9 5 GPM When maximum temperature is set at 185 F When maximum temperature is set at 120 F 0 5 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperature 70...

Page 117: ... 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 50 F PHH 25R Water Flow Rate GPM Outlet Temperature F 90 110 0 40 GPM 8 5 GPM When maximum temperature is set at 140 F When maximum temperature is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 60 F PHH 25R Water Flow Rate GPM Outlet Temperature F 90 11...

Page 118: ...10 0 11 0 100 110 120 130 140 Inlet Water Temperature 50 F PHH 25R Commercial Setting Water Flow Rate GPM Outlet Temperature F 150 160 170 180 185 85 0 40 GPM 8 5 GPM When maximum temperature is set at 185 F When maximum temperature is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperature 60 F PHH 25R Commercial Setting Water Flow Rate GPM Outle...

Page 119: ... 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 50 F PHH 32R Water Flow Rate GPM Outlet Temperature F 90 110 0 40 GPM When maximum temperature is set at 140 F When maximum temperature is set at 120 F 9 5 GPM 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 85 100 120 130 140 Inlet Water Temperature 70 F PHH 32R Water Flow Rate GPM Outlet Temperature F 90 11...

Page 120: ...10 0 11 0 100 110 120 130 140 Inlet Water Temperature 50 F PHH 32R Commercial Setting Water Flow Rate GPM Outlet Temperature F 150 160 170 180 185 85 0 40 GPM 9 5 GPM When maximum temperature is set at 185 F When maximum temperature is set at 120 F 0 5 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 100 110 120 130 140 Inlet Water Temperature 60 F PHH 32R Commercial Setting Water Flow Rate GPM Outle...

Page 121: ...ONTROL MOTOR MOTEUR DE CONTRÔLE DU VOLUME D EAU R RED ROUGE W WHITE BLANC BR BROWN BRUN BL BLUE BLEU BK BLACK NOIR GY GRAY GRIS G GREEN VERT Y YELLOW JAUNE BK USC1 117 USC2 117 W W LIMITER LIMITEUR MOTOR MOTEUR LIMITER LIMITEUR MOTOR MOTEUR 4 5 6 7 8 GY R BL SV4 BK BK BK BK 1 2 3 V T BL M W FLAME ROD 1 ÉLECTRODE DE DÉTECTION DE FLAMME 1 FLAME ROD 3 ÉLECTRODE DE DÉTECTION DE FLAMME 3 FOR INDOOR DIR...

Page 122: ... 2 ÉLECTROVALVE 2 ÉLECTROVALVE 1 SOLENOID VALVE 1 ÉLECTROVALVE DANS ADMISSION DE GAZ SOLENOID VALVE 0 ELECTRODE ALLUMEUR ANTI FROST HEATER CHAUFFAGE ANTI GIVRE FUSIBLE 3A OVER HEAT LIMITER LIMITEUR DE SURCHAUFFE WATER FLOW SENSOR CAPTEUR DE DÉBIT D EAU P G F R VALVE ON MARCHE OFF ARRÊT CONTACTEUR DIP 1 DIP SWITCH 1 DIP SWITCH 2 CONTACTEUR DIP 2 ON MARCHE OFF ARRÊT ÉLECTROVALVE DE DÉRIVATION D EAU ...

Page 123: ...71 48 2 16 108 93 2 6 076 138 2 2 602 183 2 1 236 50 15 449 95 5 86 140 2 52 185 1 202 51 8 14 82 96 8 5 653 141 8 2 442 186 8 1 169 53 6 14 221 98 6 5 454 143 6 2 367 188 6 1 137 55 4 13 469 100 4 5 264 145 4 2 295 190 4 1 106 57 2 13 104 102 2 5 081 147 2 2 225 192 2 1 077 59 12 583 104 4 905 149 2 157 194 1 048 60 8 12 086 105 8 4 736 150 8 2 092 195 8 1 02 62 6 11 611 107 6 4 574 152 6 2 029 1...

Page 124: ...isplays on the remote control ________________ d Release the Adjusting Button SW3 4 Verify maximum manifold setting The setting value will be displayed on the remote control a Without any water flow press and hold down the Adjusting Button SW3 b Momentarily press the Maximum Button SW2 c Record the number displayed on the remote control ___________________ d Release the Adjusting Button SW3 ON 1 2...

Page 125: ...umber 01 39 is displayed on the LED of remote control Continue to momentarily press the Maximum Button SW2 until you get to the value recorded in step 4 c Note Every time you press the MAXIMUM SW2 Button the display will cycle up to the number 39 Once it reaches 39 it will automatically reverse and cycle back down to 01 d Release the Maximum Button SW2 first then release the Adjusting Button SW3 1...

Page 126: ...sure differs depending on models types of gas or installation condition Measure the fan pressure at each installation site 1 Measurement of minimum capacity a At the condition that the remote control is off and with any water flow press and hold down the Minimum Button SW1 on the PCB b Using the manometer measure and record the minimum fan pressure within 20 seconds 2 Measurement of maximum capaci...

Page 127: ...asure and record the fan pressure for the slow ignition point d Press and hold down the Adjusting Button SW3 and using the manometer adjust the slow ignition manifold pressure to the standard pressure see table below plus the previous recorded fan pressure for the slow ignition point in step 14 b above e Release the Adjusting Button SW3 f Turn off power at remote control g Changed the DIP switch 1...

Page 128: ...djusted the DIP switch setting if necessary for the high altitude setting etc Standard Pressure inch in w c PHH 32RDV PHH 25RDV L P NAT L P NAT Minimum Capacity 0 91 11 0 0 71 7 1 0 91 11 0 0 71 7 1 Maximum Capacity 3 64 11 0 3 13 7 1 2 24 11 0 1 97 7 1 Slow Ignition Point 2 76 11 0 2 52 7 1 2 76 11 0 2 52 7 1 PHH 32ROF PHH 25ROF L P NAT L P NAT Minimum Capacity 0 89 11 0 0 65 7 1 0 89 11 0 0 65 7...

Page 129: ...er 5 Find the two DIP switches located at the top right hand side of the PCB The switch labeled DIP 2 is the bottom switch 6 Change the DIP switch 3 setting of DIP 2 to ON position if the water heater is installed above 3 280 feet 1 000m below 6 560 feet 2 000m See the diagram below DO NOT alter any other DIP Switch 7 Change the DIP switch 4 setting of DIP 2 to ON position if the water heater is i...

Page 130: ...being scalded See the Instruction Manual before setting the temperature on the remote control FEEL WATER BEFORE BATHING or SHOWERING DO NOT leave a child in the bath unsupervised Danger Hotter water increases the potential for Hot Water SCALDS Notice For safety reasons the BATH Remote Control s cannot be adjusted to temperature above 120ºF 49ºC Note We recommend that you install the thermostatical...

Page 131: ...at your risk WARNING Water Temperature over 125ºF 52ºC can cause severe burns instantly or death from scalds Children disabled and elderly persons are at highest risk of being scalded See the Instruction Manual before setting the temperature on the remote control FEEL WATER BEFORE BATHING or SHOWERING DO NOT leave a child in the bath unsupervised Danger Hotter water increases the potential for Hot...

Page 132: ...ng this setting is done at your risk WARNING Water Temperature over 125ºF 52ºC can cause severe burns instantly or death from scalds Children disabled and elderly persons are at highest risk of being scalded See the Instruction Manual before setting the temperature on the remote control FEEL WATER BEFORE BATHING or SHOWERING DO NOT leave a child in the bath unsupervised Danger Hotter water increas...

Page 133: ... of the first heater 3 Plug the cable into the connector marked F in the upper right hand corner of the Control Board see Figure 1 The connector will only fit one way Press until the connector snaps into place 4 Secure the DUOnex cable with the clamp and screw provided to the bottom right of the Control Board see Figure 1 5 Change the 4 Dip Switch setting to the ON position see Figure 1 inset on t...

Page 134: ... 1 Turn off the system at the remote control and remove the front cover from the main water heater 2 At the main water heater the one that is wired to the Remote Control Thermostat change the 4 Dip Switch setting see Figure 3 to the OFF position Wait two seconds and turn the 4 Dip Switch setting back to the ON position The LED see Figure 1 on the Control Board and dashes on the display of the Remo...

Page 135: ...exTM cable through a grommeted hole in the bottom of the second water heater 7 Plug the cable into the connector marked F on the right of the Control Board see Figure 5 The connector will only fit one way Press until the connector snaps into place 8 Find DIP1 Switches in the upper right hand corner of the Control Board see Figures 5 and 6 9 Change the 4 Dip Switch setting on the DIP1 Switches to t...

Page 136: ... on the remote control Turn off the gas and water shutoff valve 2 Press the DOWN arrow temperature adjustment button on the remote control see Figure 4 for several times and set the minimum setting temperature 100 F 38 C or 85 F 29 C 3 Press and hold the DOWN button on the remote control for more than 5 seconds Number on the display of the remote control will begin to blink 4 While the number is b...

Page 137: ...ctions Be sure your water heater and the manifold controller are properly installed in accordance with local codes and the provided installation instructions Do not attempt to repair or replace any parts All servicing should be referred to a qualified technician Read and follow all instructions Save this instruction for future reference Table of Contents Safety Information Operation Instructions T...

Page 138: ...ip in Scalds D A N G E R HOT Water temperature over 125 can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded See instruction manual before setting temperature at water heater Feel water before bathing or showering Temperature limiting valves are available see manual BURN F 52 C The time temperature relationship table shown above m...

Page 139: ...Slots 7 13 Water Heater Manifold Control Cable Slots 14 20 Water Heater Manifold Control Cable Slots 1 6 Manifold Cable Support Mounting Holes 4 Digit Diagnostic Display Service Dip Switches Service Switches Remote Control Terminals Available Accessories MICS 180 Expansion Card Kit MIC K 16 16ft Manifold Control Cable MIC K 32 32ft Manifold Control Cable MIC K 65 65ft Manifold Control Cable Lower ...

Page 140: ... system will detect this and bring online additional units to meet the increased demand As the hot water demand decreases the system will reduce the number of operating units As the water flow stops or units are shut down for reduced demands the system will go into a stand by ready to fire mode for a few minutes It is normal for the fans to run after the wa ter demand has stopped and the burners h...

Page 141: ...upon water heater model Not available on some models Section 1 3 Status Lights The status lights on the remote consist of a Burner On indicator see Figure 1 3 and a Priority light The Burner On indicator will come on to show when only when the system is heating water This is regardless of the number of units operating in the system The Priority light tells which remote control has priority over th...

Page 142: ...for service and operation Wall studs should be utilized when mounting the manifold control ler to the wall Alternately a suitable piece of wood may be placed inside or outside of the wall to span the distance between the wall studs Fasten the manifold controller cabinet mounting brackets to the wood In case of dry wall or concrete wall use appropriate dry wall anchors or lag bolts Install a wood s...

Page 143: ... control board using a molex connector The cable can only be con nected one way do not force the connections as damage to both the cable and control boards can occur NOTICE The tankless water heaters connected to this system must be of the same type and model do not connect heaters of different types or capacities to this system This instructions assumes the tankless water heaters have been instal...

Page 144: ...ctions Section 3 3 b Control Cable Installation at the controller Figure 3 3 b Control Cable Installation at Controller Control Cable Connectors DO NOT turn on the power to the water heaters or controller until all communication cables are connected to the water heaters and the manifold controller Wire Clamp Cable Through Grommeted Hole Section 3 4 Expansion Card Installation optional When more th...

Page 145: ...ang box or can be mounted directly to the wall surface with suitable anchors Connect the two conductor wire to the two screw terminals on the back of the remote control Secure the wire under the hold down tabs and route the wire towards the center of the remote control If the wire is surface mounted route the wire towards the bottom of the remote and carefully remote the knockout at the bottom of ...

Page 146: ...manifold control cabinet unit will begin to blink dashes see figure on page 3 The dashes will appear while the system is synchronizing with the tankless water heaters Depending upon the number of tankless water heaters connected to the system this synchronization can take up to 3 minutes Once the system has syn chronized the remote control and diagnostic display will go blank An LED indicator will...

Page 147: ...ttempt to repair or replace any parts All servicing should be referred to a qualified technician Read and follow all instructions Save this instruction for future reference Table of Contents Safety Information Operation Instructions Instructions for the Installer High Temperature Operation 147 This system is designed to operate up to 6 tankless water heaters in a parallel manifold system All tankl...

Page 148: ...hip in Scalds D A N G E R HOT Water temperature over 125 can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded See instruction manual before setting temperature at water heater Feel water before bathing or showering Temperature limiting valves are available see manual BURN F 52 C The time temperature relationship table shown above ...

Page 149: ...tempt to Use any other type of cable with this controller Mounting Bracket Remote Control Required to Run System The remote is included with the tankless water heaters Connect only one 1 remote to the main water heater REMOTE PRIORITY BURNER INDICATOR Show Status of the Burners LED DISPLAY Shows Temperature Setting and Error Codes UP BUTTON DOWN BUTTON POWER BUTTON POWER INDICATOR Control Board Gr...

Page 150: ...se the system will detect this and bring online additional units to meet the increased demand As the hot water demand decreases the system will reduce the number of operating units As the water flow stops or units are shut down for reduced demands the system will go into a stand by ready to fire mode for a few minutes It is normal for the fans to run after the wa ter demand has stopped and the bur...

Page 151: ...rity light The Burner On indicator will come on to show when only when the system is heating water This is regardless of the number of units operating in the system The Priority light tells which remote control has priority over the system in applications with multiple remote controls This feature is only available on single installation residential units Figure 1 3 Raise Temperature BURNER INDICA...

Page 152: ...e Manifold Controller After all the tankless water heaters are installed in accordance with the instructions in the Use and Care Manual select one unit to be the master Disconnect the power from the tankless water heater and remove the front cover The Manifold Control Unit will mount to the inside bottom right hand side of the tankless water heater in front of the gas valve Set the controller face...

Page 153: ...eater to ON position UP in order to switch the water heater to the manifold installation mode DO NOT alter any other DIP switch See figure 3 2 a for DIP switch location on water heater PCB Disconnect the power from all tankless water heaters Leave the power disconnected until all the tankless water heaters in the sys tem have been connected to the manifold controller The communication cable is a s...

Page 154: ...emote con trol has been installed as instructed in Section 3 you may begin the startup process Remove the front cover from the main tankless water heater with the manifold controller there are 4 four screws holding the front cover on to the unit Shutoff all water flow from the system Turn on the gas supply to the tankless water heaters Plug in or turn on the power supply to all the tankless water ...

Page 155: ...al Conversion Procedure This conversion kit is designed to upgrade select tankless water heaters to operate at higher water temperatures for commercial applications Only the selected models can be converted make no attempt to convert any other tankless model Commercial Conversion Program Chip Each program chip is designed for a specific model tankless water heater and fuel type Natural or LP Pleas...

Page 156: ...ED Program Chip Initiation Figure 2 F PRIORITY POWER ON OFF F PRIORITY POWER ON OFF Figure 4 Figure 3 5 Find the two DIP switches located at the top right hand side of the PCB The switch labeled DIP1 in the top switch 6 Change the DIP Switch 4 setting to the ON position DO NOT alter any other DIP Switch The LED on the PCB is flashing At the same time the display of the Main Remote Control starts t...

Page 157: ...ti Unit installation there is only one remote control Complete the entire manifold installation before continuing with the Commercial Conversion procedure A Complete the chip installation on each water heater as in steps 1 through 4 on the front side of this document B Find the two DIP switches located at the top right hand side of the PCB The switch labeled DIP1 in the top switch C Change the DIP...

Page 158: ... 158 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...

Page 159: ... 159 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...

Page 160: ... 160 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...

Page 161: ...r Burner Assy 701 Film Type OHL 113 Lower Burner Assy 706 Heater Holder C 826 Truss FT 4 x 12 114 Burner Block Plate 708 Holder 828 Truss Packing 115 Electrode Cover 709 Resistance 842 Truss Packing 117 SD 710 Heater Holder 850 Pan Head FT M4 x 12 130 Air Intake Assembly 713 Heat Exchanger Thermistor 858 Screw FT M4 x 10 131 Vent Assembly 714 Hot Water Outlet Thermistor 132 Intake Hood E 715 Ambie...

Page 162: ... 162 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...

Page 163: ... 163 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...

Page 164: ... 164 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...

Page 165: ...embly 815 Pan Head SW 4 x 10 108 Packing 816 Screw SW M4 x L12 112 Upper Burner Assy 701 Film Type OHL 113 Lower Burner Assy 706 Heater Holder C 826 Truss FT 4 x 12 708 Holder 828 Truss Packing 115 Electrode Cover 709 Resistance 842 Truss Packing 710 Heater Holder 850 Pan Head FT M4 x 12 713 Heat Exchanger Thermistor 858 Screw FT M4 x 10 714 Hot Water Outlet Thermistor 715 Ambient Temp Thermistor ...

Page 166: ...Schematic Disassembly PHH 32RDV PHH 25RDV 166 ...

Page 167: ...Schematic Disassembly PHH 32RDV PHH 25RDV 167 ...

Page 168: ...SW M4 x L12 113 Lower Burner Assy 701 Film Type OHL 824 Pan Head SW 4 x 8 114 Burner Block Plate 706 Heater Holder C 826 Truss FT 4 x 12 708 Holder 828 Truss Packing 117 SD 710 Heater Holder 842 Truss Packing 850 Pan Head FT M4 x 12 129 Air Intake Assembly 713 Heat Exchanger Thermistor 858 Screw FT M4 x 10 131 Vent Assembly 714 Hot Water Outlet Thermistor 716 Ambient Temp Thermistor 874 Enplatight...

Page 169: ... 169 Schematic Disassembly PHH 32ROF PHH 25ROF ...

Page 170: ... 170 matic Disassembly PHH 32ROF PHH 25ROF ...

Page 171: ...815 Pan Head SW 4 x 10 112 Upper Burner Assy 561 Neutralization Plate A 816 Screw SW M4 x L12 113 Lower Burner Assy 701 Film Type OHL 706 Heater Holder C 826 Truss FT 4 x 12 708 Holder 828 Truss Packing 117 SD 710 Heater Holder 842 Truss Packing 850 Pan Head FT M4 x 12 713 Heat Exchanger Thermistor 858 Screw FT M4 x 10 714 Hot Water Outlet Thermistor 716 Ambient Temp Thermistor 874 Enplatight Scre...

Page 172: ...Paloma Industries Inc 2151 Eastman Avenue Oxnard CA 93030 Phone 805 278 5499 Fax 805 278 5468 Tech Support Center 800 432 8373 Printed in USA 2011 08 ...

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