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Watts PVi CENTURION Installation, Operation And Maintenance Manual Download Page 106

Centurion Water Heater- Edge [ii]: Install-Operation-Service

 

 SECTION  10: TROUBLESHOOTING  

 

OMM-0153_A   

•    8/25/2022      Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST         Page 106  of 131 

Centurion Troubleshooting Procedures 

Fault  

Probable Causes 

Corrective Action 

HEAT 
DEMAND 
FAILURE 

1. 

The Heat Demand Relays on 
the Ignition/Stepper (IGST) 
board failed to activate 
when commanded. 

1. 

Press CLEAR button and restart the unit.  If the fault 
persists, replace Ignition/Stepper (IGST) Board. 

2. 

Relay is activated when not 
in Demand. 

2. 

Defective relay. Replace IGST Board. 

HIGH 
EXHAUST 
TEMPERATU
RE 

1. 

Poor combustion calibration. 

1. 

Check combustion calibration using procedures in 
Section 5.4: 

Combustion Calibration

 of this

 

guide. 

2. 

Carboned heat exchanger 
due to incorrect combustion 
calibration. 

2. 

If exhaust temperature is greater than 200°F 
(93.3°C), check combustion calibration. Calibrate or 
repair as necessary. 

HIGH GAS 
PRESSURE 

1. 

Incorrect supply gas 
pressure. 

1. 

Check to ensure gas pressure at inlet of SSOV does 

not exceed 14” W.C. (3.49 kPa).

 

2. 

Defective SSOV Actuator. 

2. 

If gas supply pressure downstream of SSOV Actuator 
cannot be lowered to 

below 2.5” W.C. (622 Pa)

; the 

SSOV Actuator may be defective. 

3. 

Defective High Gas Pressure 
switch.  

3. 

Remove the leads from the High Gas Pressure 
switch. Measure continuity across the common (C) 
and normally closed (NC) terminals with the unit not 
firing. Replace the switch if continuity does not 
exist. 

HIGH 
WATER 
TEMP 
SWITCH 
OPEN 

1. 

Faulty Water temperature 
switch. 

1. 

Test the temperature switch to insure it trips at its 
actual water temperature setting. 

2. 

Incorrect PID settings. 

2. 

Check PID settings (Advanced Setup 

→

 Performance 

→

 Temperature Control, first 3 items). If the settings 

have been changed, record the current readings 
then reset to default values. 

3. 

Faulty shell temperature 
sensor. 

3. 

Using the resistance charts in Appendix B: 

Temperature Sensor Resistance/Voltage Chart

 

measure the resistance of Shell sensor and BTU 
sensor at a known water temperature. 

4. 

Unit in Manual mode. 

4. 

If unit is in Manual mode, switch to Auto mode 
(Diagnostic 

→

 Manual Run, Manual Mode). 

5. 

Unit setpoint is greater than 
Over Temperature switch 
setpoint. 

5. 

Check setpoint of unit and setpoint of Temperature 
switch; Ensure that the temperature switch is set 

higher than the unit’s setpoint.

 

6. 

System flow rate changes 
are occurring faster than 
units can respond.   

6. 

If system is a variable flow system, monitor system 
flow changes to ensure that the rate of flow change 
is not faster than what the units can respond to. 

HIGH 
WATER 
TEMPERATU
RE 

1. 

See High Water 
Temperature Switch Open. 

1. 

See High Water Temperature Switch Open. 

2. 

Temp HI Limit setting is too 
low. 

2. 

Check Temp HI Limit setting. 

Summary of Contents for PVi CENTURION

Page 1: ...fire department Installation and service must be performed by a qualified installer service agency or the gas supplier OMM 0153_A 8 25 2022 Disclaimer The information contained in this manual is subject to change without notice from PVI Industries LLC PVI makes no warranty of any kind with respect to this material including but not limited to implied warranties of merchantability and fitness for a...

Page 2: ...Isolation Valve 20 2 6 TEMPERATURE AND PRESSURE RELIEF VALVE INSTALLATION 20 2 7 CONDENSATE DRAIN AND PIPING 21 2 8 GAS SUPPLY PIPING 22 2 8 1 Gas Supply Specifications 23 2 8 2 External Gas Supply Regulator 23 2 8 3 Massachusetts Installations Only 24 2 8 4 Manual Gas Shutoff Valve 24 2 9 AC ELECTRICAL POWER WIRING 25 2 9 1 Power Panel Locations 25 2 9 2 Electrical Power Panel Internal Components...

Page 3: ... 6 1 Constant Setpoint Mode 52 5 6 2 Remote Setpoint Mode 53 SECTION 6 SAFETY DEVICE TESTING 54 6 1 TESTING SAFETY DEVICES 54 6 2 LOW GAS PRESSURE TEST 55 6 3 HIGH GAS PRESSURE TEST 56 6 4 LOW WATER LEVEL FAULT TEST 57 6 5 WATER TEMPERATURE FAULT TEST 58 6 6 INTERLOCK TESTS 59 6 6 1 Remote Interlock Test 59 6 6 2 Delayed Interlock Test 59 6 7 FLAME FAULT TEST 60 6 8 AIR FLOW FAULT TESTS BLOWER PRO...

Page 4: ... Notes 85 8 7 2 Hardware Installation 85 8 7 3 WHM Modbus Network Wiring 85 8 7 4 Control And Power Wiring 87 8 8 WHM PROGRAMMING START UP 90 8 8 1 WHM Manager Configuration 90 8 8 2 WHM Client Configuration Start Up Procedure 91 8 9 TROUBLESHOOTING 92 8 10 SEQUENCING VALVE DESCRIPTION OPERATION 92 8 10 1 Sequencing Valve Operating Characteristics 93 SECTION 9 O2 TRIM OPERATION 94 9 1 O2 TRIM INTR...

Page 5: ... CENTURION 2000 complies with the NOx emission standards outlined in South Coast Air Quality Management District SCAQMD Rule 1146 2 Whether used in singular or modular arrangements CENTURION Water Heaters offer the maximum venting flexibility with minimum installation space requirements CENTURION Water Heaters are Category II and IV positive pressure appliances Single and or multiple breeched unit...

Page 6: ...Carbon Monoxide COMM Communication Cal Calibration CNTL Control CPU Central Processing Unit DBB Double Block and Bleed a gas trains containing 2 Safety Shutoff Valves SSOVs and a solenoid operated vent valve DHW Domestic Hot Water DIP Dual In Line Package a type of switch ECU Electronic Control Unit O2 sensor Edge Controller A control system currently used in all CENTURION Water Heaters EMS Energy...

Page 7: ...tween BAS and a Water Heater PVC Poly Vinyl Chloride a common synthetic plastic PWM Pulse Width Modulation REF Ref Reference RES Resistive RS232 EIA 232 A standard for serial full duplex FDX data transmission based on RS232 Standard RS485 EIA 485 A standard for serial half duplex HDX based on the RS485 Standard RTN Rtn Return SETPT Setpt Setpoint Temperature SHLD Shld Shield SPDT Single Pole Doubl...

Page 8: ...t in a safe place for future reference WA R N I NG Do not use matches candles flames or other sources of ignition to check for gas leaks Fluids under pressure may cause injury to personnel or damage to equipment when released Be sure to shut off all incoming and outgoing water shutoff valves Carefully decrease all trapped pressures to zero before performing maintenance Before attempting to perform...

Page 9: ...erated unattended Water Heaters in a location other than a Water Heater room provide a readily accessible manually operated remote shutdown switch or circuit breaker marked for easy identification at a location in the event of Water Heater mis operation Design the system so activation of the emergency shutdown switch or circuit breaker will immediately shut off fuel to the unit s For Water Heaters...

Page 10: ...with an alarm is installed on each additional level of the dwelling building or structure served by the side wall horizontal vented gas fueled equipment It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors a In the event that the side wall horizontally vented gas fueled equipment...

Page 11: ... the installation of the venting system design or the venting system components and 2 A complete parts list for the venting system design or venting system d MANUFACTURER REQUIREMENTS GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases but identifies special ve...

Page 12: ...e to the packaging materials should also be made clear to the delivering carrier 2 2 UNPACKING Carefully unpack the unit taking care not to damage the unit enclosure when cutting away packaging materials After unpacking make a close inspection of the unit to ensure that there is no evidence of damage not indicated by the Tip N Tell indicator The freight carrier should be notified immediately if an...

Page 13: ...um acceptable clearances required are as follows Front 24 inches 61 cm Sides 24 inches 61 cm Rear 24 inches 61 cm Top 18 inches 45 7 cm All gas piping water piping and electrical conduit or cable must be arranged so that they do not interfere with the removal of any panels or inhibit service or maintenance of the unit In multiple unit installations it is important to plan the position of each unit...

Page 14: ...e 2 1 Clearances W AR N I N G Keep unit area clear and free from all combustible materials and flammable vapors or liquids FOR MASSACHUSETTS ONLY For Massachusetts installations the unit must be installed by a plumber or gas fitter licensed within the Commonwealth of Massachusetts In addition the installation must comply with all requirements specified in Section 1 4 above ...

Page 15: ... re installing Whether the unit will connect to a Condensate Neutralizer tank The minimum pad thickness for installations without a Condensate Neutralizer tank is 4 to 8 inches 10 2 to 20 3 cm If you are using the Condensate Neutralizer Tank P N 89030C you must ensure enough height for the condensate to drain into the condensate trap then into the neutralizer tank and then to the drain This may re...

Page 16: ...or move Water Heater using the gas train or blower Three lifting lugs are attached to the top of the heat exchanger as shown below Remove the front and rear top panels from the unit to access the lifting lugs Remove the four 4 lag screws securing the unit to the shipping skid Lift the unit off the shipping skid and position it on the required concrete housekeeping pad Trap Support Housekeeping Pad...

Page 17: ...he mating surfaces are thoroughly clean CENTURION Water Heaters have the following inlets and outlets 3 7 6 cm flange water INLET and hot water OUTLET piping One of the following gas inlet pipes o 2 5 08 cm NPT Natural Gas inlet pipe 8 20 3 cm Air Inlet adapter CONDENSATE DRAIN NATURAL GAS INLET HOT WATER OUTLET BUILDING RECIRCULATION WATER INLET WARMER WATER AIR INLET 1 of 2 COLD WATER INLET COOL...

Page 18: ...outlet and the lower cold water inlet provide temperature data to the Edge Controller The Controller utilizes this data to modulate the fire rate Air Fuel Valve position to precisely maintain the hot water outlet temperature at the selected setpoint temperature A check valve integrated into the pump prevents the water flow from the cold water inlet side to the hot water outlet side through the rec...

Page 19: ...can take further advantage of the unit s condensing capabilities When configured in this way thermal efficiency can improve by up to 6 based on an 80 F 26 7 C minimum return water temperature at full fire To use the recirculation inlet pipe the warmer building return water to the building recirculation upper inlet and the cold domestic inlet water to the lower inlet If the flow through both the pr...

Page 20: ...ND PRESSURE RELIEF VALVE INSTALLATION An ASME rated Temperature and Pressure Relief Valve is supplied with each CENTURION Water Heater The valve setpoint is 150 psig 1034 kPa at 210 F 98 9 C The relief valve is installed on the hot water outlet of the Water Heater as shown below A suitable pipe joint compound should be used on the threaded connections Any excess should be wiped off to avoid gettin...

Page 21: ... must be observed to ensure proper condensate drainage Condensate trap inlet must be level with or lower than the exhaust manifold drain port The base of the condensate trap must be supported to ensure that it is level horizontal The trap must be removable for routine maintenance PVI recommends that a union be utilized between the exhaust manifold condensate drain port and the trap inlet port If t...

Page 22: ... of ignition to check for gas leaks CA U TI O N Many of the soaps used for gas pipe leak testing are corrosive to metals Therefore piping must be rinsed thoroughly with clean water after leak checks have been completed NOTE All gas piping must be arranged so that it does not inhibit removal of covers or service maintenance or restrict access between the unit and walls or other units Model Natural ...

Page 23: ...ssure with a manometer at the NPT ball valve provided at the SSOV inlet In a multiple Water Heater installation gas pressure must initially be set for single unit operation and then the remaining units must be staged on at full fire to insure gas pressures never falls below the supply gas pressure when the single unit was firing All CENTURION models have a low supply gas pressure switch in the gas...

Page 24: ...rest downstream fittings an elbow or the unit itself and a minimum of 5 pipe diameters between the pressure regulator and any upstream fitting such as elbow or shutoff valve as shown below Figure 2 11 Gas Regulator and Manual Shut Off Valve 2 8 3 Massachusetts Installations Only For Massachusetts installations a mandatory external gas supply regulator must be positioned as shown in Figure 2 11 The...

Page 25: ...o the unit in an easily accessible location to disconnect electrical service quickly and safely DO NOT attach the switch to sheet metal enclosures of the unit After placing the unit in service the ignition safety shutoff device must be tested If an external electrical power source is used the installed Water Heater must be electrically bonded to ground in accordance with the requirements of the au...

Page 26: ...be installed so that it does not interfere with the removal of any unit covers inhibit service maintenance or prevent access between the unit and walls or another unit 2 10 FIELD CONTROL WIRING I O BOARD Each unit is fully wired from the factory with an internal operating control system No field control wiring is required for normal operation However the Edge Controller used with your CENTURION un...

Page 27: ...ure 2 14 Secondary Power Panel Terminals Figure 2 15 I O Board Cable Connections SPARK MONITOR FROM SHELL HARNESS 63216 2 CONNECTOR J9 I O BOARD POWER HARNESS 63232 CONNECTOR J24 LOW WATER CUTOFF JUMPER CONNECTOR J8 40 PIN RIBBON I O HARNESS 63220 CONNECTOR J1 30 PIN RIBBON I O HARNESS 63221 CONNECTOR J2 4 20mA OUT BLOCKED FLUE SWITCH BLOWER RELAY PUMP RELAY OXYGEN SENSOR ...

Page 28: ...Header Supply Header Connection to the Supply Header temperature sensor 2 wire sensor P N 24410C or 4 wire sensor P N 61058C for Solar Waste Heat application Booster heat application Typically used on Manager and Backup Manager units 6 Remote Analog In Connection to the Analog Remote Signal if Operating Mode Remote Setpoint Used on Manager and Backup Manager units 7 Remote Analog In 8 Shield Conne...

Page 29: ...CO Analog In Connector Strip J5 Terminals Pin Name Description 1 Spare Analog In 3 Connection to one of the following signals SmartPlate Valve input Swing V1 feedback Swing V2 Feedback VS Pump Feedback Variable Speed Pump Feedback Remote Setpoint 2 DHW VSP Fdbk To assign program its function go to the Controller s Main Menu Advanced Setup Ancillary Devices Analog Inputs then set the Analog Input S...

Page 30: ...et Select Relay to Spare 2 Relay and set Relay Name to one of the above devices 2 Spare 2 Relay Com 3 DHW Pump Relay N O Tank Pump 2 4 DHW Pump Relay Com 5 V2 Spare 1 Relay N O Connection to an auxiliary device enable disable signal such as Tank Pump 2 Summer Pump Louver System Pump Pump 2 Louver 2 To assign program its function go to Main Menu Advanced Setup Ancillary Devices Relays then set Sele...

Page 31: ...64 cm per 0 3 m to avoid any condensate pooling and to allow for proper drainage While there is a positive flue pressure during operation the combined pressure drop of vent and combustion air systems must not exceed 140 equivalent feet 42 7 m or 0 8 W C 199 Pa Fittings as well as pipe lengths must be calculated as part of the equivalent length For a natural draft installation the draft must not ex...

Page 32: ...heet metal enclosure Consult the CENTURION Venting and Combustion Air Design Guide TAG 0022 GF 2050 when designing combustion air ducting In a ducted combustion air application the combustion air ducting pressure losses must be taken into account when calculating the total maximum allowable venting run When using the unit in a ducted combustion air configuration the minimum diameter connection at ...

Page 33: ...described below NOTE The pre programmed Sequencing Valve control is installed on Water Heaters that are part of a Water Heater Management WHM group Refer to Section SECTION 8 for instructions WHM Sequencing Isolation Valve Installation 1 Remove the Sequencing Isolation Valve from the shipping container 2 Attach valve to the water outlet of the unit using the pipe union and nipple provided 3 Ensure...

Page 34: ...his relay to activate the pump through an intermediate relay with a higher power Figure 2 18 Water Heater Pump Relay The Pump Off Delay feature allows the user to keep the pump running for up to 30 minutes after the Water Heater has shut down and the demand is satisfied To enable this feature go to Main Menu Advanced Setup Ancillary Devices Relay and set the Pump Off Delay parameter to the number ...

Page 35: ...leshoot the Water Heater The Edge Controller s front panel consists of a touchscreen display along with a variety of indicators and buttons Figure 3 1 Edge Controller Front Panel 1 Multi Function Bar shows either Fire Rate Valve Position 2 Parameter Indicator for both temperature read outs LEFT Inlet or Setpoint temperature RIGHT Outlet or System Header temperature 3 Temperature scale indicator Fa...

Page 36: ... password for Master Technicians is distributed on an individual basis To enter a password 1 On the Edge Controller go to Main Menu Advanced Setup Access The Enter Password screen appears 2 Use the number keypad to enter the password then press Save You will have access to the functionality associated with the level of the password entered Figure 3 2 Enter Password Screen 3 Once you have successfu...

Page 37: ...trained personnel may void the equipment warranty In addition the following WARNINGS and CAUTIONS must be observed at all times 4 1 START SEQUENCE When the Edge Controller Enable Disable switch is set to the Enable position it checks all pre purge safety switches to ensure they are closed These switches include High Water Temperature switch High Gas Pressure switch Low Gas Pressure switch Low Wate...

Page 38: ...and the following events occur a The Blower relay energizes and turns on the blower b The Air Fuel Valve rotates to the full open purge position and closes purge position switch The dial on the Air Fuel Valve Figure 4 2 2 will read 100 to indicate that it is full open 100 c The Fire Rate bar graph on the Controller s front face shows 100 5 Next the Blower Proof and Blocked Inlet switches close Fig...

Page 39: ...nition position and closes the ignition switch The Dial on the Air Fuel Valve Figure 4 5 will read between 25 and 35 to indicate that the valve is in the low fire position b The Spark Cleaning cycle begins default duration 7 sec and the Ignition Sequence screen s Spark Cleaning indicator turns grey This cycle turns on the ignition transformer to produce a spark with no gas flowing to remove moistu...

Page 40: ...it Front Panel Configuration will continuously display on the Controller s bar graph 11 Once the demand for heat is satisfied the Controller turns off the SSOV gas valve The blower relay is deactivated and the Air Fuel Valve closes Standby is displayed NOTE Pre purge default setting is 14 seconds to provide four 4 air changes of the combustion chamber heat exchanger and exhaust manifold of the uni...

Page 41: ...between the energy input and Air Fuel Valve position for the models covered in this document CEN2000 Air Fuel Valve Position NATURAL GAS Air Fuel Valve Position Open Energy Input Btu Hr Water Heater Energy Input Of Full Capacity 18 Stop Level 100 000 29 3 kW 5 30 310 000 90 9 kW 16 40 540 000 158 3 kW 27 50 770 000 225 7 kW 39 60 1 030 000 301 9 kW 52 70 1 290 000 378 1 kW 65 80 1 560 000 457 2 kW...

Page 42: ...ive pressure Water Heater rooms may set Standby Blower Voltage between 2 00 and 0 volts to compensate Figure 5 1 Operating Control Screen Initial start up consists of the following REMOVE THE AIR FILTER BAG BEFORE STARTING THE UNIT Combustion calibration Section 5 3 Test safety devices Section SECTION 6 Start up must be successfully completed before putting the unit into service The start up instr...

Page 43: ... 16 W C 4 0 kPa gas supply manometer or gauge is used in the following ways Mounted on the upstream side of the SSOV to verify that the gas supply pressure is within the required range of 4 W C and 14 W C Mounted on the downstream side of the SSOV to monitor the gas pressure during the Combustion Calibration procedure described in 5 3 1 1 Turn off the main gas supply upstream of the unit 2 2 Remov...

Page 44: ...of pre heated DHW systems with multiple CENTURION units it is recommended to lower the Next On Valve Pos setting to 30 40 Default 50 so subsequent Water Heaters are engaged sooner to provide rapid response and divide the system flow over additional units In case of DHW pre heat systems the required temperature rise through an individual unit can be much lower to ensure flow per unit does not excee...

Page 45: ...bration value and adjust the O2 to the O2 Trim value instead 5 3 1 Instructions For Combustion Calibration 1 Ensure the Edge Controller s Enable Disable switch is set to Disable 2 Open water supply and return valves to unit and ensure system pumps are running 3 Open the NATURAL GAS supply valve to the unit 4 Turn external AC power to the unit ON 5 Go to Main Menu Calibration Manual Combustion if n...

Page 46: ... bring the unit to the desired valve position right image below Preset Calibration Points Method Fine VP Step Method Figure 5 7 Choose NOx Requirement 10 Set the Controller s Enable Disable switch to Enable 11 Change the valve position to 30 press the Go button then verify that the unit has ignited and is operating as expected 12 Use the Right arrow key to change the valve position to 100 then pre...

Page 47: ...in the range in the Manifold Gas Pressure Table above and the O2 Reading column matches the Target column 18 Enter the downstream manometer s gas pressure reading in the Downstream Gas Pressure field Note this field appears only when Valve Position 100 19 Compare the measured nitrogen oxide NOx and carbon monoxide CO readings to the Target Values shown below If you are not in a NOx limited area an...

Page 48: ...set the unit can be reassembled for service operation 1 Set the Controller s Enable Disable switch to the Disable position 2 Disconnect AC power to the unit 3 Shut off the gas supply to the unit 4 Remove the manometer and barbed fittings and reinstall the NPT plug using a suitable pipe thread compound 5 Remove the combustion analyzer probe from the 1 4 vent hole in the exhaust manifold and then re...

Page 49: ...s the Automatic Reset Limit Switch s SET button SP appears in the display 3 Press the SET button again The current setting stored in memory is displayed 4 Press the or arrow buttons to change the display to the desired temperature setting 5 When the desired temperature is displayed press the SET button 6 Press both the SET and arrow buttons at the same time This stores the setting in memory note t...

Page 50: ...t section Temperature control calibration should be performed each time the setpoint is changed There are two primary adjustments for performing temperature calibration Min Load Adj and Max Load Adj minimum and maximum load adjustment Adjustments to these settings are made at minimum and maximum load conditions and should be made in small increments from 1 to 3 degrees F 0 55 to 1 65 degrees C Aft...

Page 51: ...tings Figure 5 12 FFWD Settings Screen 2 Set the Outlet Feedback parameter to No 3 While monitoring the Valve Position bar graph create a minimum load on the system that will yield a steady valve position between 25 and 35 NOTE It may be desirable to shut off the outlet valve and use the drain valve on the water inlet pipe to simulate a minimum load condition 4 Wait several minutes to allow the ou...

Page 52: ...ncrease outlet water temperature then allow 2 3 minutes for the system to stabilize 8 Repeat step 7 as needed until the temperature is stabilized within 2 3 F 1 1 to 1 65 C of the unit s setpoint 9 Set the Outlet Feedback parameter back to Yes 10 If the outlet temperature does not maintain setpoint after a reasonable amount of time and adjustment contact your local PVI representative 5 6 MODES OF ...

Page 53: ...storage tanks set DHW Tank Config to No Tanks One Tank or Two Tanks 5 6 2 Remote Setpoint Mode In this mode the unit adjusts the setpoint in response to a remote signal You must specify how the unit will communicate with the remote source To set the unit to Remote Setpoint mode 1 Go to Advanced Setup Unit Application Configuration Figure 5 15 Application Configuration Screen 2 Set the Operating Mo...

Page 54: ...nd safety devices should be tested on a regular basis or following service or replacement All testing must conform to local codes such as ASME CSD 1 Notes Manual and Auto modes are required to perform the following tests For a full explanation see Edge Controller Manual OMM 0161 Section 4 1 Front door and side panels must be removed to perform the tests described below W AR N I N G Disable power p...

Page 55: ... Menu Diagnostics Manual Run enable the Manual Mode control 7 Adjust the Air Fuel Valve position between 25 and 30 using the and controls 8 While the unit is firing slowly close the external manual gas shut off valve upstream of the unit not shown 9 The unit should shut down and display Fault Lockout Gas Pressure Fault at approximately the pressure shown below LOW Gas Pressure 0 2 W C 50 Pa Model ...

Page 56: ...ou make 9 The FAULT indicator should start flashing and the unit should shut down and display a Fault Lockout Gas Pressure Fault message at approximately the value shown in Table 6 3 the High Gas Pressure switch setting If the unit does not trip off within 0 2 W C of the pressure shown the switch needs to be replaced HIGH Gas Pressure 0 2 W C 50 Pa Model Natural Gas CEN2000 FM DBB Single Fuel 2 4 ...

Page 57: ...T indicator flashes 5 Go to Main Menu Diagnostics Manual Run and enable Manual Mode 6 Raise the valve position above 30 using the Plus and Minus controls 7 Set the Controller s Enable Disable switch to Enable The READY light should remain off and the unit should not start If the unit does start shut the unit off immediately and refer fault to qualified service personnel 8 Close the drain and press...

Page 58: ...igure 6 5 Over Temperature Limit Switches NOTE If the Controller s is not configured to display outlet temperature go to Advanced Setup Unit Front Panel Configuration and set Upper Right Display to Water Outlet Figure 6 6 Edge Controller Front Face 3 Once the Automatic Reset Over Temperature switch setting is approximately just below the actual outlet water temperature the unit should shut down th...

Page 59: ...ls remove one side of the jumper If the interlock is being controlled by an external device either open the interlock via the external device or disconnect one of the wires leading to the external device 5 The unit should shut down and the Controller should display Interlock Open 6 Once the interlock connection is reconnected the Interlock Open message should automatically clear and the unit shoul...

Page 60: ...le to start the unit 7 The unit should purge and light the Pilot flame and then shut down after reaching the main Burner Ignition cycle and display Flame Loss During Ign 8 Open the Manual Shutoff valve closed in step 5 and press the CLEAR soft key 9 Restart the unit and allow it to prove flame 10 Once flame is proven close the Manual Shutoff valve located between the SSOV and the Air Fuel Valve se...

Page 61: ... shown above 3 Use a Phillips head screw drive to remove the front cover from the switch to reveal the switch setting indicator dial 0 6 in the figure below Figure 6 8 Blower Proof Switch 4 Set the Controller s Enable Disable switch to Enable and wait for the Water Heater to go into the Purge sequence 5 After about 5 seconds with air flowing into the combustion chamber slowly turn the dial clock w...

Page 62: ...ure 6 9 Connecting the Flame Signal Generator 4 Go to Diagnostics Manual Run and enable the Manual Mode control 5 Complete the following a Ramp the Water Heater up to 100 fire rate and then set the Controller s Enable Disable switch to Enable b When the Controller gets into the ignition phase it will show Ignition Trial At that point attach the alligator clip see Figure 6 8 3 to any bare metal sur...

Page 63: ... the Controller s Enable Disable switch to Enable to start the unit 9 Remove the wire again when the unit reaches the purge cycle and Purging is displayed 10 The unit should shut down and display SSOV Fault During Purge 11 Replace the wire on the SSOV and press the CLEAR button The unit should restart 6 10 PURGE SWITCH OPEN DURING PURGE The Purge switch and Ignition switch is located on the Air Fu...

Page 64: ... valve position between 25 and 30 using the Plus and Minus controls 4 Remove the Air Fuel Valve cover Figure 6 10 above by rotating counterclockwise 5 Remove wire 1611 or 1612 from the Ignition switch Figure 6 11 6 Set the Controller s Enable Disable switch to Enable to start the unit 7 The unit begins its start sequence and then shut down and display Ign Switch Open During Ignition 8 Replace wire...

Page 65: ...turion Water Heater Edge ii Install Operation Service SECTION 6 SAFETY DEVICE TESTING OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 65 of 131 This page intentionally blank ...

Page 66: ...ABOR TIME 7 2 Igniter Injector Inspect Inspect replace if necessary Replace 15 mins 7 3 Flame Detector Inspect Inspect replace if necessary Replace 15 mins 7 4 O2 Sensor inspection and calibration Inspect Inspect Clean Calibrate 15 mins 5 4 Combustion Calibration Check Check 1 hr 7 5 Testing of Safety Devices See ASME CSD 1 Chart 45 mins 7 6 Burner Inspect 2 hrs 7 8 Condensate Drain Trap Inspect I...

Page 67: ... instructions are included in the CEN2000 12 Month P N 58025 25 and 24 Month P N 58025 26 and 58025 27 Maintenance Kits The igniter injector may be hot therefore care should be exercised to avoid burns It is easier to remove the igniter injector from the unit after the unit has cooled to room temperature To inspect replace the Igniter Figure 7 1 Igniter Injector Flame Detector Note that during ins...

Page 68: ...uld be cleaned and inspected every 12 months It is not included in any of the 12 or 24 month maintenance kits It is located on the burner plate at the top of the unit It may be hot so allow unit to cool sufficiently before removing or replacing it Figure 7 3 O2 Sensor Mounting Location Lean O2 Sensor Maintenance 1 Set the Enable Disable switch on the Edge Controller to Disabled 2 Remove the top en...

Page 69: ...rforming these tests 7 6 BURNER INSPECTION The burner assembly should be inspected every 24 months to ensure that all components are intact and functioning as designed This requires the replacement the burner gasket and blower and gas train O Rings which are included in the 24 Month Maintenance Kit If the burner is not fully intact it must be replaced as soon as possible The burner assembly is loc...

Page 70: ...ust be inspected for leaks and blockages cleaned to ensure that the float is free to move and condensate flows normally and the O Ring P N 84017C included in all 24 Month Maintenance Kits replaced if it is worn or damaged In addition you must ensure the vent under the removable cover is free and clear of obstructions Figure 7 5 External Condensate Trap Cross Section Exploded View If your system in...

Page 71: ...an or replace the air filter may affect stable combustion result in less efficient operation and may result in combustion reliability issues All 24 Month Maintenance Kits include one of two parts An Air Filter Cleaning Kit Appropriate if the filter is intact New Air Filter Necessary if the filter is deteriorated or damaged Check the table below to find the part number of the kit appropriate for yo...

Page 72: ...on will ever get below freezing for even a short time you must drain all water from the unit before the temperature falls below freezing Step 6 is not sufficient as it leaves some water in the bottom of the heat exchanger chamber You must then use a suction pump inserted through the inspection ports to remove all water from the bottoms of the heat exchanger chamber and base assembly W AR N I N G F...

Page 73: ...ondition and check for obstructions Spark Igniter Injector Weekly Operator See Section 7 2 Ignitor Injector in this guide Air Fuel Valve position Weekly Operator Check position indicator dial See Section 4 2 SSOV Leakage test Annually Service Tech Check for leakage in accordance with the SSOV manufacturer s Siemens recommendations Flame failure Weekly Operator Close manual gas shutoff valve and ch...

Page 74: ...CRIPTION Part Number VAC Blower Replacement Kit 460V 58063 1 VAC Blower Replacement Kit 208V 58063 2 SSOV Actuator Regulator Combo Used on ALL FM gas trains Downstream SSOV on DBB gas trains 64048 SSOV Actuator Without Proof of Closure Switch Used on Upstream SSOV on DBB gas trains 27086 1 TABLE 9 3 Recommended Emergency Spare Parts DESCRIPTION PART NUMBER Actuator Replacement Kit SSOV with P O C ...

Page 75: ...Centurion Water Heater Edge ii Install Operation Service SECTION 7 MAINTENANCE OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 75 of 131 This page intentionally blank ...

Page 76: ...s is done to organize all WHM related information into a single section thus minimizing referencing back to these descriptions and procedures It is assumed that the user is familiar with the basic Edge Controller s menu processing procedures used throughout this manual 8 1 GENERAL DESCRIPTION The Edge Controller s Water Heater Management system WHM is designed to ensure that all Water Heaters in t...

Page 77: ...ing Manager also monitors the total accumulated operating time for each unit on the system and attempts to balance the system so that all units operate for approximately the same number of hours 8 3 WHM FEATURES 8 3 1 Valve Feedback The Valve Feedback feature is designed to confirm that the Sequencing Isolation Valve has successfully executed either a Valve Open or Valve Close command from the Edg...

Page 78: ...equired to set the Edge in Manual Mode Any level password will enable Manual Mode 8 3 5 Auto Manager Transfer The Auto Manager Transfer feature once enabled automatically transfers WHM Manager functionality to a new unit if the current WHM Manager fails or loses power To use this feature default Disabled go to Advanced Setup WHM Cascade Cascade Configuration on the unite designated as the WHM Mana...

Page 79: ...rmance Temperature Control Temperature Conformance the effective Fire Rate will be reduced by the value entered in GOV Limit 5 through GOV Limit 15 8 4 WHM STATUS DISPLAYS The following WHM status information will be displayed to inform the user of critical WHM real time operating conditions Once a unit is defined as the WHM Manager the green Manager light appears on the Controller s face and the ...

Page 80: ...eters will not appear on screen if they are not enabled WHM Cascade Cascade Configuration Parameters Menu Item Display Available Choices or Limits Default Minimum Maximum WHM Unit Mode Off WHM Client WHM Manager Off Enables disables the WHM mode and sets the unit to function as a WHM Client or WHM Manager Set the WHM Unit Mode option to WHM Manager for the unit designated as the WHM Manager and to...

Page 81: ...d Only WHM Manager only Displays the number of comm errors on Clients 1 8 Comm Error 9 16 0 0 0 0 0 0 0 0 Read Only WHM Manager only Displays the number of comm errors on Clients 9 16 SSD Address 0 250 0 The Client Client Device address for backwards compatibility SSD Temp Format Degrees or Points Degrees WHM Manager only Choose Degrees or Points Unit Failsafe Mode Constant Setpt or Shutdown Const...

Page 82: ...s WHM Cascade Application Configuration Parameters Menu Item Display Available Choices or Limits Default Minimum Maximum Application Read Only DHW Specifies the application for the entire WHM Cascade Operating Mode Read Only Constant Setpoint Specifies the operating mode for the entire WHM Cascade WHM Setpoint 60 F 170 F 120 F Specifies the Setpoint for the entire WHM Cascade Figure 8 6 Applicatio...

Page 83: ... line WHM Max Units 1 16 16 WHM Manager only The maximum number of units that will fire For example if there are 5 units but this setting is set to 3 the plant will not fire more than 3 units WHM Client Screen WHM Manager Screen Figure 8 7 Operating Controls Sequencing Controls Screens Operating Controls Anti Cycling Parameters Menu Item Display Available Choices or Limits Default Minimum Maximum ...

Page 84: ...ed Disabled Disabled Allows Valve Feedback functionality to be enabled Valve Feedback Status appears Valve Feedback Timer 30 Sec 240 Sec 60 Sec The amount of time for the valve to open before returning an error Valve Feedback Status Open Close Read Only Displays the status of the selected valve Figure 8 9 Operating Controls Valve Configuration Screen Operating Controls Lead Lag Control Parameters ...

Page 85: ...rk in I O board b Make sure that the Modbus load and bias resistors are properly configured for the system to operate without the ProtoNode installed c Temporarily set the WHM system for Constant Setpoint mode of operation see below d Turn on and completely test the installation to verify that it is operating proper e Once the installation is working properly as a WHM system install the ProtoNode ...

Page 86: ... Connect Modbus wiring 1 Starting at the first unit connect the twisted shielded pair cable to the BST WHM RS485 plus and minus terminals on the left side I O board RS485 ISO GND Figure 8 12 WHM Network Wiring Diagram 2 At the I O board of the first unit in the daisy chain not necessarily Manager activate the DIP switch labeled MODBUS TERM by placing it in the up position This will connect a termi...

Page 87: ... 5 pm EST Page 87 of 131 8 7 4 Control And Power Wiring Control and power wiring connections to the Sequencing Valves associated with each Edge WHM unit is accomplished by simply ensuring that the 4 pin Molex connectors on the units are connected to the corresponding connectors on the valves Figure 8 12 WHM Network Wiring Diagram Reference SD A 878 rev F ...

Page 88: ...r Edge ii Install Operation Service SECTION 8 WATER HEATER MANAGEMENT OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 88 of 131 Figure 8 13 WHM Network Wiring Diagram Reference SD A 659 rev C ...

Page 89: ...r Edge ii Install Operation Service SECTION 8 WATER HEATER MANAGEMENT OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 89 of 131 Figure 8 14 WHM Network Wiring Diagram Reference SD A 927 rev C ...

Page 90: ...er b You have the option of designating one of the units in the WHM Cascade as a Backup Manager If the WHM Manager fails manager functionality will automatically transfer to the designated Backup Manager To use this functionality enable the Auto Manager Transfer parameter then specify the Backup Manager s address in the Backup Manager Addr parameter You can also enter a delay before transferring m...

Page 91: ...nt Limit parameter which allows you to set the number of degrees below Setpoint High Limit the unit s outlet temperature must fall before restart Enable Setpoint Limiting and then configure the Setpoint Limit Band 7 If you want to change the Lead Lag Hours go to Advanced Setup WHM Cascade Operating Controls Lead Lag set Lead Lag Settings to Select Lead Lag then select the Lead and Lag units in the...

Page 92: ... that none of the units have the same Comm address Actuator controlled Sequencing Valve does not open 1 Control cable not connected to valve actuator 2 24 VDC power not being supplied to valve actuator 3 Defective valve actuator 1 Ensure that the control cable from the unit s I O Box is connected to the valve actuator 2 Remove the enclosure cover from the valve actuator and verify that 24 VDC is p...

Page 93: ...de is operated with a standard hex wrench included see Fig 8 16 To manually open or close the valve disconnect the 5 pin connector on the Actuator to ensure 24 VDC power is not supplied 8 10 1 Sequencing Valve Operating Characteristics The Sequencing Valve is powered by 24 VDC power supply The unit has a 5 pin molex valve harness and the valve has a mating 5 pin plug and play connector The 5 pins ...

Page 94: ...will normally vary within an acceptable level but will not be fully optimized for efficiency and reliability The O2 Trim system is designed to measure and maintain an ideal air fuel ratio in Centurion Water Heaters thus maximizing efficiency and reliability while minimizing emissions Figure 9 1 Simplified O2 Trim Diagram W AR N I N G O2 Trim and combustion calibration can both alter the voltage se...

Page 95: ...ow the user to select the optimal air fuel ratio for a particular Water Heater or application Figure 9 2 shows how the controller would react to an O2 reading above the upper limit It will reduce the blower voltage BV until the O2 reading is within the Target Range provided the BV adjustments are within the limits for that fire rate The control will then store this as the new BV calibration settin...

Page 96: ...he sensor to settle Enter the O2 reading from the analyzer to complete the calibration process Figure 9 3 O2 Sensor Calibration Screen 9 4 TRIM MENU VALUES AND DEFAULTS There are three O2 Trim screens available from Main Menu Advanced Setup Performance O2 Trim O2 Trim Settings To enable O2 Trim set the O2 Trim parameter to Enabled You can then adjust the O2 Offset Settle Time O2 Trim Gain and O2 T...

Page 97: ...A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 97 of 131 Figure 9 5 O2 Trim Parameters Screen O2 Trim Status Displays the current status of O2 Trim operation Figure 9 6 O2 Trim Status Screen For more information see the Edge Controller Manual OMM 0161 GF 213 Section 6 6 1 ...

Page 98: ...6 70 3 8 5 6 80 3 8 5 6 100 3 8 5 6 O2 Lower must be at least 1 lower than O2 Upper 18 2 5 5 5 5 1 30 2 5 5 5 5 1 40 2 5 5 5 5 4 50 2 5 5 5 5 1 60 5 1 70 2 5 5 5 5 1 80 5 1 100 2 5 5 5 5 1 O2 Upper must be at least 1 higher than O2 Lower 18 5 5 8 5 6 1 30 5 5 8 5 6 1 40 5 5 8 5 6 2 50 5 5 8 5 6 1 60 6 1 70 5 5 8 5 6 1 80 6 1 100 5 5 8 5 6 1 O2 Offset 3 0 3 0 1 0 CEN2000 O2 Trim Adjustment Range CA...

Page 99: ...olutions O2 Percentage Low O2 Levels less than 2 for more than 30 seconds auto reset when valve comes back in range Dirty filter or poor combustion calibration recalibrate unit O2 Offset too low Increase Offset value Bad Sensor Replace O2 Sensor Malfunction O2 Levels less than 4 or more than 24 for more than 10 seconds manual clearing of this fault is required Bad Sensor Replace Communication Issu...

Page 100: ...ocked O2 Trim is ready to start the process None Normal Operation Adjust O2 trim is correcting the system None Normal Operation Settle System is settling after the correction None Normal Operation Done O2 Trim is successfully completed None Normal Operation BV Hi Err O2 Trim operation exceeds blower voltage limits Check air filter gas regulator combustion calibration BV Lo Err Check sensor calibra...

Page 101: ...Centurion Water Heater Edge ii Install Operation Service SECTION 9 O2 TRIM OPERATION OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 101 of 131 ...

Page 102: ...Trim troubleshooting messages are included in Section 9 5 above When a fault occurs in the unit proceed as follows to isolate and correct the fault 10 1 1 Fault Correction 1 Observe the fault messages displayed on the Edge Controller 2 Refer to the Fault Indication column in the table below and locate the Fault that best describes the existing conditions 3 Proceed to the Probable Cause column and ...

Page 103: ...eater than zero ohms replace the switch 7 Bad inlet air temperature sensor 7 Check the actual inlet air temperature reading and measure resistance at the Sensor Harness connection P1 Verify that the reading conforms to the values shown in Appendix B Temperature Sensor Resistance Voltage Chart 8 Defective temperature sensor 8 Refer to CORRECTIVE ACTION 7 and verify that the voltage conforms to the ...

Page 104: ...y trip thermal or current overload devices 2 Blocked Blower inlet or inlet ductwork 2 Inspect the inlet to the blower including any ductwork leading up to the combustion blower for signs of blockage 3 Blockage in air filter or Blocked Inlet switch 3 Remove the air filter and Blocked Inlet switch and inspect for signs of blockage clean or replace as necessary 4 Defective Blocked Inlet switch 4 Veri...

Page 105: ...unit Install and arc a spark igniter outside the unit 3 Defective Ignition Transformer 3 If there is no spark check for 120 VAC at the primary side to the ignition transformer during the ignition cycle 4 Defective Ignition Stepper IGST Board 4 If 120 VAC is not present the IGST Board in the Edge Controller may be defective Refer fault to qualified service personnel 5 Defective SSOV 5 While externa...

Page 106: ... the High Gas Pressure switch Measure continuity across the common C and normally closed NC terminals with the unit not firing Replace the switch if continuity does not exist HIGH WATER TEMP SWITCH OPEN 1 Faulty Water temperature switch 1 Test the temperature switch to insure it trips at its actual water temperature setting 2 Incorrect PID settings 2 Check PID settings Advanced Setup Performance T...

Page 107: ...rrectly correct wire numbers on the normally open terminals If wired correctly replace switch 4 Defective Power Supply Board or fuse 4 Check DS1 DS2 LEDs on Power Supply Board If not steady ON replace Power Supply Board 5 Defective IGST Board 5 Check Heartbeat LED DS1 and verify it is blinking ON OFF every second If not replace IGST Board IGN SWITCH OPEN DURING IGNITION 1 Air Fuel Valve not rotati...

Page 108: ...as Pressure switch If greater than 1 inch above Low Gas Pressure switch setting measure continuity across the switch and replace if necessary LOW WATER LEVEL 1 Insufficient water level in system 1 Check system for sufficient water level 2 Defective water level circuitry 2 Test water level circuitry using the Low Water TEST and RESET buttons on the Controller s front panel Replace water level circu...

Page 109: ...fuse 4 Check DS1 DS2 LEDs on Power Supply Board If they are not steady ON replace Power Supply Board 5 Defective IGST Board 5 Check Heartbeat LED DS1 and verify it is blinking ON OFF every second If not replace IGST Board OUTDOOR TEMP SENSOR FAULT 1 Loose or broken wiring 1 Inspect Outdoor Temperature sensor for loose or broken wiring 2 Defective Sensor 2 Check resistance of sensor to determine if...

Page 110: ...lt persists replace Ignition Stepper IGST Board 2 Floating Neutral 2 The Neutral and Earth Ground are not connected at the source and therefore there is a voltage measured between the two Normally this measurement should be near zero or no more than a few millivolts 3 Hot and Neutral reversed at SSOV 3 Check SSOV power wiring SSOV SWITCH OPEN 1 Actuator not allowing for full closure of gas valve 1...

Page 111: ...fault message being displayed TABLE 12 2 Water Heater Troubleshooting with No Fault Message Displayed Observed Incident Probable Causes Corrective Action Hard Light Off 1 Clogged damaged Gas Injector on Igniter Injector Figure 7 2 1 1 Disconnect the Staged Ignition Assembly solenoid from the Gas injector Tube of the Igniter Injector Figure 7 2 1 and inspect Gas Injector to ensure it is not clogged...

Page 112: ...l Operation Service SECTION 10 TROUBLESHOOTING OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 112 of 131 Figure 10 1 Gas Train Component Locations P N 22362C Shown Figure 10 2 Intake Manifold and Components ...

Page 113: ...Heater Edge ii Install Operation Service SECTION 10 TROUBLESHOOTING OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 113 of 131 Figure 10 3 SSOV Actuator with Gas Pressure Adjustment SKP25 ...

Page 114: ...enturion Water Heater Edge ii Install Operation Service SECTION 10 TROUBLESHOOTING OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 114 of 131 This page intentionally blank ...

Page 115: ...r Edge ii Install Operation Service APPENDIX A DIMENSIONS AND CLEARANCE OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 115 of 131 APPENDIX A DIMENSIONS AND CLEARANCE CENTURION 2000 Dimension ...

Page 116: ...turion Water Heater Edge ii Install Operation Service APPENDIX A DIMENSIONS AND CLEARANCE OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 116 of 131 CENTURION 2000 Clearance ...

Page 117: ... ii Install Operation Service APPENDIX B WIRING DIAGRAMS OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 117 of 131 APPENDIX B WIRING DIAGRAMS CENTURION 2000 Drawing Number 68106 rev A Sheet 1 of 4 ...

Page 118: ...er Heater Edge ii Install Operation Service APPENDIX B WIRING DIAGRAMS OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 118 of 131 CENTURION 2000 Drawing Number 68106 rev A Sheet 2 of 4 ...

Page 119: ...er Heater Edge ii Install Operation Service APPENDIX B WIRING DIAGRAMS OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 119 of 131 Centurion 2000 Drawing Number 68106 rev A Sheet 3 of 4 ...

Page 120: ...er Heater Edge ii Install Operation Service APPENDIX B WIRING DIAGRAMS OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 120 of 131 CENTURION 2000 Drawing Number 68106 rev A Sheet 4 of 4 ...

Page 121: ... 92094 Drain Valve 3 4 GAS TRAIN ASSEMBLIES See full diagram below 5 1 22362 CEN2000 Standard Gas Train 22442 CEN2000 DBB Gas Train HEAT EXCHANGER 6 1 80081 Shell Insulation Upper 7 1 80128 Shell Insulation Lower 8 1 28752 CEN2000 Heat Exchanger Dual Inlet 9 2 93748 Plug 1 1 2 Brass BURNER BLOWER A F Valve See full diagram below 10 1 26024 1 Burner Blower Assy 460 Voltage 10 1 26024 2 Burner Blowe...

Page 122: ...ST Page 122 of 131 Item Qty Part Description 16 1 61056 Temperature Sensor Dual Thermocouple 18 1 122843 Low Water Cutoff 20 1 64081 ECU for O2 Sensor 21 1 59178 Vent Air 1 8 NPT 22 1 123863 Valve Ball 1 8 NPT 23 1 61026 O2 Sensor 24 1 65085 Ignition Transformer 25 1 124866 Staged Ignition Solenoid 26 1 66026 Ignitor Injector Replacement Kit and or Catalog number ...

Page 123: ...ge 123 of 131 ENCLOSURE PANELS Item Qty Part Description 1 1 30156 TOP PANEL FRONT 2 1 30157 TOP PANEL BACK 3 1 37148 BACK PANEL LEFT 4 1 37149 BACK PANEL RIGHT 7 1 39184 1 8 AIR INLET ADAPTER 8 8 59133 LATCH COMPRESSION 9 1 25087 1 FRONT FRAME ASSEMBLY 10 2 30155 SIDE PANEL 11 1 25095 FRONT PANEL ASSEMBLY POWER PANEL WITH COVERS REMOVED POWER PANEL WITH COVERS REMOVED ...

Page 124: ...ed 5 1 65247 24 VDC Power Supply 2 5 A 6 1 65231 12 V Power Supply 5 A 7 2 65121 Terminal Block White 8 2 65120 Terminal Block Black 9 1 60036 3 Pole 20 Amp Circuit Breaker 10 2 65118 Fuse Terminal 11 2 65122 Terminal Ground Block FRONT VIEW Front panel removed 12 1 25090 Connection Panel Cover 13 1 25089 Power Panel Cover 14 1 64141 I O Board Edge 16 1 69344 1 Edge ii Control Panel 64142 17 1 641...

Page 125: ... FRU Kit 64048 SSOV WITH PRESSURE REGULATOR FRU Kit 24667 12 A F Valve CEN2000 FRU Kit CENTURION 2000 Wiring Harnesses not shown Part Description 63059 HARNESS BLOWER POWER 63083 1 HARNESS O2 SENSOR 63121 HARNESS 12V POWER SOURCE 63122 CABLE GROUND 12 63004 2 STEPDOWN TRANSFORMER HARNESS 3 PHASE LINE 63004 1 STEPDOWN TRANSFORMER HARNESS 120V 24V LINE 63215 2 HARNESS SENSOR Blue 63218 2 A F VALVE H...

Page 126: ...itch 1 20 W C manual reset 8 1 92006 7 Valve Ball Brass 1 1 2 NPT 21 3 9 22 Pipe Plug 1 4 NPT 11 1 124150 Valve SSOV 1 1 2 NPT 22 1 60020 Gas Pressure Switch 2 20 W C auto reset 14 1 69005 Actuator SSOV W Regulator 23 1 99017 Pressure Snubber 1 4 15 1 97087 12 Flexible Gas Tube 24 2 92077 1 4 NPT MXF Brass Ball Valve 16 2 12951 2 Bushing Control Box 25 1 92076 1 4 NPT Ball Valve 19 1 99015 Damping...

Page 127: ...153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 127 of 131 CENTURION 2000 Recirculation Loop P N 22384C Item Qty Part Description 1 1 69371 Circulator Pump 2 2 95037 Flange Taco 3 1 97174 Reducing Tee 1 to NPT 4 1 92060 Drain Valve 5 2 92125 1 5 Ball Valve Full Port 1 5 NPT ...

Page 128: ...Low NOx 7 1 24356 1 Flame Detector 9 1 59104 Observation Port 10 3 53033 Washer Clocking 11 1 58023 Ignitor Injector 12 1 24277 Staged Ignition Assembly 13 1 61026 O2 Sensor 14 3 9 22 Plug HEX HD 1 4 NPT 15 1 81157 Blower Gasket 16 1 24350 Blower EBM 3 Phase 460 VAC 16 1 24351 Blower EBM 3 Phase 208 VAC 21 1 81105 O Ring 22 1 43090 Air Fuel Valve Plenum 25 1 81057 Gasket Blower 26 1 21006 8 Air Fu...

Page 129: ... Sensor Resistance Ohms F C PT 1000 Balco 40 40 0 843 779 30 34 4 865 797 5 20 28 9 887 816 3 10 23 3 908 835 4 0 17 8 930 854 8 10 12 2 952 874 6 20 6 7 974 894 7 30 1 1 996 915 1 40 4 4 1000 935 9 50 10 0 1017 956 9 60 15 6 1039 978 3 70 21 1 1061 1000 80 26 7 1082 1022 90 32 2 1104 1044 4 100 37 8 1125 1067 110 43 3 1147 1090 120 48 9 1168 1113 3 130 54 4 1190 1137 140 60 0 1211 1160 9 150 65 6...

Page 130: ...Centurion Water Heater Edge ii Install Operation Service CHANGE LOG OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 130 of 131 NOTES ...

Page 131: ... Install Operation Service CHANGE LOG OMM 0153_A 8 25 2022 Technical Support 800 526 0288 Mon Fri 8 am 5 pm EST Page 131 of 131 Change Log Date Description Changed By 8 25 2022 Rev A Initial Release DWBarron PVI Industries LLC 2022 ...

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