Paloma PH-28RIFSN Engineering Handbook Download Page 1 | Manualshive

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R

Tankless Gas Water Heaters

PH-28RIFSN; PH-28CIFSN (Indoor) (NAT. Gas)
PH-28RIFSP; PH-28CIFSP (Indoor) (L.P. Gas)
PH-28ROFN; PH-28COFN (Outdoor) (NAT. Gas)
PH-28ROFP; PH-28COFP (Outdoor) (L.P. Gas)
PH-28RDVSN; PH-28CDVSN (Direct Vent) (NAT. Gas)
PH-28RDVSP; PH-28CDVSP (Direct Vent) (L.P. Gas)
(R: Residentail Model; C: Commercial Model)

Engineering Handbook

DESIGN

CERTIFIED

®

CERTIFIED

R

Indoor Water Heater

Outdoor Water Heater

Direct Vent Water Heater

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Summary of Contents for PH-28RIFSN

Page 1: ...8ROFN PH 28COFN Outdoor NAT Gas PH 28ROFP PH 28COFP Outdoor L P Gas PH 28RDVSN PH 28CDVSN Direct Vent NAT Gas PH 28RDVSP PH 28CDVSP Direct Vent L P Gas R Residentail Model C Commercial Model Engineeri...

Page 2: ...y or the gas 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 installa...

Page 3: ...ax 10 5 w c L P Gas Min 8 0 w c Max 14 0 w c Do not exceed maximum pressure Hot Water Supply Factory Setting 100 F Adjusting Range R 100 F 120 F 140 F C 100 F 180 F Max Setting Up to 140 F R or 180 F...

Page 4: ...10mm 3 4 NPT M 3 4 NPT M W Supplied Gas Shutoff Valve 3 4 NPT M 40mm 0 59 15mm 0 59 15mm 8 17 207mm 8 82 224mm 2 13 54mm 0 73 18 5mm 25 39 645mm 27 36 695mm 26 46 672mm 0 33 8mm 1 89 48mm 1 97 50mm 6...

Page 5: ...7 8 21mm 4 3 4 120mm 4 3 4 120mm 1 7 8 46mm 3 1 4 83 5mm 6 34 161mm POWER SUPPLY CORD HOLE COLD WATER INLFT 6 34 161mm 8 39 213mm 4 69 119mm 5 51 140mm HOT WATER OUTLET 3 45 1 89 48mm 27 36 695mm 25...

Page 6: ...24 Water Control Body Assy 5 Heat Exchanger 15 Fan Assembly 25 PC Board 6 Heat Transfer Coil 16 Gas Control Valve Assembly 26 Film Type OHL 7 Water Supply Coil 17 Water Supply Pipe 8 Turbulence Plate...

Page 7: ...4 Flue Outlet 14 Fan Assembly 24 PC Board 5 Heat Exchanger 15 Gas Control Valve Assembly 25 Film Type OHL 6 Heat Transfer Coil 16 Water Supply Pipe 7 Water Supply Coil 17 Hot Water Supply Pipe 8 Turb...

Page 8: ...Body Assy 4 Exhaust Flue Top 14 Fan Assembly 24 Film Type OHL 5 Heat Exchanger 15 Gas Control Valve Assembly 25 Sensing Burner Assembly 6 Heat Transfer Coil 16 Water Supply Pipe 26 Burner Rod 7 Water...

Page 9: ...3 Freeze Protection Heater 4 Water Inlet Thermistor 14 Orifice 24 Fan 5 Heat Exchanger Thermistor 15 Main Burner 25 Fan Motor 6 Hot Water Outlet Thermistor 16 Igniter 26 Drain Valve 7 Water Flow Servo...

Page 10: ...olenoid Valve 3 12 and also the Proportional Gas Control Valve 13 continuously adjusts the gas volume in order to maintain the outlet temperature from the Heat Exchanger 19 The Water Flow Servo 7 also...

Page 11: ...The sensing burner is located in the part of the main burner and designed to monitor the flame condition at all times Therefore it shut off gas before the imperfect combustion occurs in the main burn...

Page 12: ...rrent Decrease of Thermo Electric Current Secondary Warning Alarm Light Shut Down After Purging Monitor Code No Error Code Both Red and Green flashing at the same time 05 Both Red and Green flashing a...

Page 13: ...6 GPM 7 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 Water Flow Rate GPM Outlet Temperature F When maximum temperature is set at 140 F When...

Page 14: ...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 50 F Water Flow Rate GPM Outlet Temperature F 0 66 GPM 7 4 GPM When maximum temperature is set at 180 F When maximum t...

Page 15: ...W1 SW3 R R G Y BK W AC 100V G Y W AC 120V FOR INDOOR MODEL ONLY 1 4 5 6 3 2 3 6 5 2 1 4 IG WV B DIP SWITCH ADJUSTER BUTTON MIN BUTTON MAX BUTTON MAIN WATER BY PASS SOLENOID VALVE V A L V E 3 S O L E N...

Page 16: ...Operational Flow Chart Maintenance Information 16...

Page 17: ...oltage showed is the value of operating condition when the water heater operates according to the flow chart The resistance showed is the value of load side when turned off the electric power and disc...

Page 18: ...18...

Page 19: ...MAINTENANCE INFORMATION SHOWN IN LED DISPLAY OF REMOTE CONTROL ABOVE 19...

Page 20: ...lame Failure Ensure you have gas to the appliance Ensure gas type and pressure is correct Bleed all air from gas lines Ensure flame rod wire is connected Check flame rod for carbon build up Ensure gas...

Page 21: ...hermistor Fault Check thermistor wiring for damage Ohm out thermistor Check and clean scale from thermistor 33 Hot Water Outlet Thermistor Fault Check thermistor wiring for damage Ohm out thermistor C...

Page 22: ...for proper voltage and for water condensation damage 80 Gas Cut Off Failure Solenoid Valve 1 2 Failure Ohm out all solenoid valves Check voltage of all flame rods 81 Extinction Failure Solenoid Valve...

Page 23: ...ff valve Wait for the water heater to become cool Be careful to avoid injury to your fingers WARNING Shock hazard line voltage is present Before servicing the water heater turn off the electric power...

Page 24: ...r to water heater 2 Error Code 14 Over Heating is displayed Is the Film Type OHL OK 2 Replace Burner Control Assy YES NO Replace Film Type OHL 2 Measure the resistance of connector Between both White...

Page 25: ...Max Min Button 2 The water heater seems to be normal Operate it without pushing the Max Min Button NO YES Replace Burner Control Assy 2 Do not operate water heater by pushing the Max Min Button on PC...

Page 26: ...ow and Blue wires 4 10 VDC Pulse NOTE The above voltage is an approximate rate measured by common digital tester DC RANGE G D Does not try to ignite even if the Fan is activated 1 Error Code 31 Water...

Page 27: ...y to operate again Is the resistance of the hot water outlet thermistor OK 3 NO YES Replace Burner Control Assy Replace Hot Water Outlet Thermistor 4 Error Code 34 Ambient Air Thermistor Disconnection...

Page 28: ...place Air Filter Switch Assy 5 Measure the voltage and resistance of connector Between both White wires Voltage Less than 1 VDC Resistance 1 ohm Measure these after the air filter switch is ON O Is th...

Page 29: ...Control Assy Clean or replace Burner and Flame Rod Electrode E The igniter does not spark and indicates Error Code 11 even when the Fan is operating Ignition Failure Does Igniter have a voltage 1 NO Y...

Page 30: ...Measure the resistance of connector Between Black and Yellow wires 0 8 2 2 k ohm NO NO YES YES Is the resistance of the Solenoid Valve 1 OK 5 K 5 Measure the resistance of connector Between Black and...

Page 31: ...Red 1 Error Code 00 1 Hour Continuous Combustion is displayed Indoor Model Only Was the water heater used more than one hour continuously NO YES Explain that this is the indication for more than one h...

Page 32: ...Replace the upper burner assy Attach the connector firmly 4 Error Code 15 Boiling Safety Device Empty Boiling Safety Device is displayed Display maintenance information 5y Are 5y and outlet temperatur...

Page 33: ...played Try visual confirmation for any remaining flame NOTE Confirm more than two times of turning on off at interval of 10 seconds No remaining flame NO Replace Gas Control Assy YES Display maintenan...

Page 34: ...ror Code 65 Malfunction of Water Volume Control Motor is displayed Turn the power off and then turn it on NO NO YES YES Is the voltage to the Motor OK 1 Replace Burner Control Assy Is the voltage to t...

Page 35: ...teration service or maintenance can cause property damage personal injury or death b Adjustment of Burner Manifold Pressure NOTE Always start from Minimum when adjusts the burner manifold pressure NOT...

Page 36: ...anges as follows 02 03 37 38 39 38 37 03 02 01 6 Detach from the Min Button and then from the Adjusting Button in this order Adjustment of Maximum Capacity 1 Open the hot water tap fully 2 Push the Ad...

Page 37: ...f Altitude Con nector is also required B When the water heater is installed at the high altitude above 3 280 feet 1 000 m adjust the high altitude connector setting according to the High Altitude DIP...

Page 38: ...water heater is installed less than 3 280 feet 1 000 m no High Altitude Chip is required or supplied and no action is required How to adjust the High Altitude Chip on the PCB for high altitude instal...

Page 39: ...t cover 14 Turn on the gas shutoff valve and water shutoff valve 15 Check and ensure safe operation and performance of the water heater WARNING ANTI SCALD WARNING FOR HIGH ALTITUDE USE If you are inst...

Page 40: ...ea Level ON 1 2 3 4 As set from factory ON 1 2 3 4 ON 1 2 3 4 Setting after adjustment to DIP Switch 1 and 2 for Sea Level How to adjust the Sea Level Chip on the PCB 1 Make sure again that the water...

Page 41: ...ferent Sea Level Chip is required for Indoor Outdoor and Direct Vent models types of gas and serial number Check the number on the Sea Level Chip Refer to the table comes with the chip 12 Change the D...

Page 42: ...water heater Turn off the gas shutoff valve and water shutoff valve 2 Remove the front cover FT Screw Burner Control Assy 3 Burner Control Assembly PC Board Removal 1 Pull out all connectors that are...

Page 43: ...urner Assembly into the combustion chamber 4 Replace three 3 screws that are located under the Upper Burner Assembly 5 Replace the two wires to the Igniter Electrodes left and right and the white wire...

Page 44: ...44...

Page 45: ...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 to flash 5 Press the Max Button on the left hand side of the...

Page 46: ...r any other DIP Switch The LED on the PCB is flashing At the same time the display of the Main Remote Control starts to flash 5 Press the Max Button on the left hand side of the PCB for more than 1 se...

Page 47: ...mote Control starts to flash 6 Change the DIP Switch 4 setting back to the OFF position DO NOT alter any other DIP Switch The LED on the PCB will stop flashing At the same time the display of the Main...

Page 48: ...t must be corrected 7 Check the performance capacity and operation after servicing Process Illustration 1 How To Remove Burner Control Assy 723 Burner Control Assembly 723 Removal 1 Pull out all wirin...

Page 49: ...ol valve assy 103 Continue from the previous page 2 Main Burner Assy 112 113 114 Removal 1 Pull out three 3 wires for electrode 132 133 in front side 2 Remove Three 3 Ft screws that are located under...

Page 50: ...four 4 type 2 TP screws for water inlet connector 142 2 Pull out the wiring that is connected to the water control assy and then remove water control assy 410 5 How To Remove Fan Assy 728 729 1 Burner...

Page 51: ...y 724 Removal 1 Remove two 2 pan head screws that are fixed the transformer assy 2 Remove transformer assy 724 7 How To Remove Igniter Assembly 123 1 Remove two 2 pan head screws that are fixed the ig...

Page 52: ...pipe 6 Remove eight 8 FT screws for back cover support plate 8 and then remove back cover support plate 8 7 Remove four 4 pan head screws for flue terminal two 2 pan head screws for inner case part an...

Page 53: ...Schematic Disassembly PH 28RIFS 53...

Page 54: ...Schematic Disassembly PH 28ROF 54...

Page 55: ...Schematic Disassembly PH 28RIFS PH 28ROF 734 55...

Page 56: ...onnector 748 Air Filter SW Connector Cord Assembly 749 Air Filter SW Assembly 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 M...

Page 57: ...Flange B 142 Water Inlet Connector 755 Power Cord Connector Assembly 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 Main Remot...

Page 58: ...Schematic Disassembly PH 28CIFS 58...

Page 59: ...Schematic Disassembly PH 28COF 59...

Page 60: ...Schematic Disassembly PH 28CIFS PH 28COF 734 60...

Page 61: ...ctor 748 Air Filter SW Connector Cord Assembly 749 Air Filter SW Assembly 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 Main...

Page 62: ...ge B 142 Water Inlet Connector 755 Power Cord Connector Assembly 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 Main Remote Co...

Page 63: ...Schematic Disassembly PH 28RDVS 63...

Page 64: ...Schematic Disassembly PH 28CDVS 64...

Page 65: ...Schematic Disassembly PH 28RDVS PH 28CDVS 65...

Page 66: ...embly 142 Water Inlet Connector 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 Main Remote Control UMC 117 204 O Ring P 10 760...

Page 67: ...embly 142 Water Inlet Connector 143 Water Inlet Pipe Assembly 700 Bath1 Remote Control USC1 117 144 Gas Inlet Connector Assy 758 Relay Cord Assembly 901 Main Remote Control UMC 117 204 O Ring P 10 760...

Page 68: ...Paloma Industries Inc 2151 Eastman Avenue Oxnard CA 93030 Phone 805 278 5499 or 805 278 5480 Fax 805 278 5468 Printed in USA 2008 09...

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