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The Bradford White

Condensing PV Series

Through-The-Wall Gas Water Heaters

Table of Contents

Page

PV Service Procedure

Introduction................................................................................................................................4

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How to Use This Manual..........................................................................................................5

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Tools Required for Service.......................................................................................................5

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Specifications.............................................................................................................................6

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Glossary of Terms .....................................................................................................................6

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Vent Tables ................................................................................................................................7

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Control Timings.........................................................................................................................9

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Sequence of Operation..............................................................................................................10

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Troubleshooting.........................................................................................................................14

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Burner Inspection, Cleaning & Replacement .........................................................................16

Pilot Inspection Testing, Cleaning & Replacement................................................................18

Pressure Switch Testing & Replacement ................................................................................19

III

Blower Testing & Replacement...............................................................................................21

Blower Temperature Switch Testing & Replacement...........................................................23

Gas Control Testing & Replacement.......................................................................................25

Simulated Resistive Device Testing ........................................................................................29

VII

Safety Circuit Voltage Trace ....................................................................................................30

VIII

115 VAC Circuit Trace.............................................................................................................31

Diptube Inspection & Replacement.........................................................................................32

Anode Inspection & Replacement...........................................................................................33

Flue Baffle Inspection & Replacement....................................................................................34

XII

Inner Door/Gasket Removal, Inspection & Replacement.....................................................36

XIII

Condensate Trap Removal, Inspection & Replacement........................................................39

XIV

Exhaust Collector Removal, Inspection & Replacement.......................................................40

Parts List.....................................................................................................................................42

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Notes...........................................................................................................................................43

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Содержание Condensing PV Series

Страница 1: ...MANUAL Troubleshooting Guide and Instructions for Service To be performed ONLY by qualified service providers Models Covered by This Manual Through The Wall Models RC2PV50H N X LC2PV50H76 N X Denotes...

Страница 2: ...acement 18 II Pressure Switch Testing Replacement 19 III Blower Testing Replacement 21 IV Blower Temperature Switch Testing Replacement 23 V Gas Control Testing Replacement 25 VI Simulated Resistive D...

Страница 3: ...phone Gas detectors are available Contact your gas supplier or plumbing professional for more information CAUTION Turn off or disconnect the electrical power supply to the water heater before servicin...

Страница 4: ...increases blower life by reducing bearing wear and noise Rugged Wiring Connections receptacle type connections promote error free wiring Increased Vent Lengths increased venting performance is achiev...

Страница 5: ...ols Required for Service Manometer Multi Meter Electronic Probes Thermometer Water Pressure Gage Various Hand Tools A liquid U tube type or a digital magnahelic type can be used This device is used to...

Страница 6: ...upply pressure Gas Control ECO Limit Residential 188 F 87 C Commercial 199 F 93 C Residential Temperature Set Point Range 60 F 16 C to 160 F 71 C approximate temperatures Commercial Temperature Set Po...

Страница 7: ...gh the Roof 2 40 12 2 7 2 1 Through the Roof 3 35 10 7 7 2 1 Through the Roof 4 30 9 2 7 2 1 3 Diameter 10 2 cm Vent Connector Lengths Terminating of Elbows Maximum Straight Length ft m Minimum Straig...

Страница 8: ...ength ft m Through the Wall 1 180 54 9 10 3 1 Through the Wall 2 175 53 3 10 3 1 Through the Wall 3 170 51 8 10 3 1 Through the Wall 4 165 50 3 10 3 1 Through the Wall 5 160 48 8 10 3 1 Through the Ro...

Страница 9: ...s 2 second maximum 1 second minimum Post purge 15 Seconds PS Fault Delay failed open close Retry after 2 minutes Soft Lockout Retry after 5 minutes ECO Limit Lockout Indefinite see PV SERVICE PROCEDUR...

Страница 10: ...ond pause The gas control waits 2 minutes and then the blower runs for 30 seconds This cycle repeats until the safety circuit opens 2 Blower energizes 3 Pressure switch proves blower vent system opera...

Страница 11: ...ff 10 Blower post purges 15 seconds Abnormal Operation 1 Simulated Resistive Device Fault a If the resistance is greater than 70 000 Ohms the gas control immediately turns off all outputs The control...

Страница 12: ...off and the control flashes 3 times with a 3 second pause The gas control waits 2 minutes before turning on the blower for another 30 seconds to check if the circuit will close This cycle repeats as...

Страница 13: ...gnition begins If the recycle count limit has been reached the gas control turns off the blower and flashes 6 times then 3 times with a 3 second pause The gas control waits 5 minutes before repeating...

Страница 14: ...e blocked or restricted 3 Oxidation build up on pilot electrode 4 Wire damage to pilot assembly or bad connection at gas valve 5 Low gas pressure Page 18 Procedure II Two flash three second pause Pres...

Страница 15: ...icted 3 Oxidation build up on pilot electrode 4 Wire damage to pilot assembly or bad connection at gas valve 5 Insufficient combustion air 6 Gas pressure is out of specification 1 4 Page 18 5 Refer to...

Страница 16: ...flame should be stable Some causes for an unstable pilot flame are a The water heater vent is less than the allowable vent length b The gas pressure is out of specification c The pilot flame is not f...

Страница 17: ...he burner assembly from the combustion chamber Step 7 Thoroughly inspect the burner surface area and burner port area and remove any loose debris Step 8 Unscrew the burner from the main burner orifice...

Страница 18: ...t if there is no continuity Step 10 Visually inspect the igniter flame sense electrode for deterioration Replace the pilot as necessary The electrode should not be in contact with the pilot hood If so...

Страница 19: ...ectrical continuity N Y Position gas valve power switch to the ON position and adjust thermostat to call for heat this will start the blower Check with multi meter do the pressure switch contacts clos...

Страница 20: ...blower housing and carefully remove the pressure switch see photo 5 Step 5 Disconnect the wire leads from the pressure switch see photo 6 Step 6 Reconnect the wires from Step 5 to the new pressure swi...

Страница 21: ...Y Is there 115VAC across the yellow and green wires see photo 12 Determine voltage problem and correct N Y Replace blower Does blower energize after 2 minutes run for 30 seconds and shut down See pre...

Страница 22: ...ion Step 11 Clean any debris from the jacket head of water heater Step 12 Set new blower with gasket in place using locating pins on blower flange to line up with location holes in jacket head Step 13...

Страница 23: ...ect wire leads and observe heater operation Does the exhaust gas temperature rise to or above 160 F with vent connected Switch OK Do switch contacts open Switch Setting Opens on rise approximately 155...

Страница 24: ...rature switch to the blower housing see photo 14 Step 5 Remove the temperature switch from the blower housing Step 6 Install the new temperature switch Be sure the temperature switch is properly seate...

Страница 25: ...Step 4 Follow instructions located on the lighting instructions label and proceed to light the main burner and observe manometer reading Step 5 Proper operating range for Natural Gas is 4 0 0 5 w c P...

Страница 26: ...at least a 45 rotation and follow the lighting instructions to return to nomal operation Observe the Green LED indication Does the error code 4 four flash with a three second pause continue Resume no...

Страница 27: ...not to damage gasket material in inner door Step 7 Removal of gas control a Disconnect main burner feedline and pilot tube b Remove the gas control from water heater by rotating counter clockwise DO N...

Страница 28: ...o interfere with the outer jacket burner access door when reinstalled f Firmly place right side inner door flange against the left side inner door flange and secure with 2 hex drive screws from step 6...

Страница 29: ...rom the gas control model dependant Step 3 Using a multi meter set to the ohms setting check resistance of the flammable vapor sensor or simulated resistive device Resistance must be between 3 000 ohm...

Страница 30: ...er does not light observe the LED flash code on the gas control and refer to the troubleshooting section see page 14 Safety circuit voltage is OK Is there 10 to 13 VAC between the pressure switch term...

Страница 31: ...Gas control Disconnect wire harness from gas control see photo 21 Is there 115VAC across black white wires as shown in photo 22 Is there 115VAC across pins 2 6 Incorrect supply voltage polarity Call f...

Страница 32: ...p 5 Visually inspect the inlet nipple diptube The inlet nipple diptube should be free of cracks and any blockage The HydroJet slots should be open and free of any blockage Any damage such as cracks re...

Страница 33: ...1 16 socket is necessary to loosen the anode Step 6 Remove the anode and visually inspect the anode Step 7 If the anode does show signs of depletion this is normal a If depletion is of the original an...

Страница 34: ...eater Step 8 Remove the jacket head screws with a nutdriver Remove the jacket head This may require assistance with a slotted screwdriver as shown below Step 9 With the jacket head removed cut the per...

Страница 35: ...acket head in place by screwing in the screws removed in Step 7 Step 17 Reinstall the blower on the jacket head There are holes in the jacket head to accept locating pins on the underside of the blowe...

Страница 36: ...any of the above gasket replacement is not required If replacement is required proceed to Inner Door Gasket Replacement Procedure Inner Door Gasket Replacement Procedure Step 5 After inspection of th...

Страница 37: ...sed channel of the inner door around the feedline Using the hex drive screws from step 3c secure the left side inner door in place DO NOT OVER TIGHTEN SCREWS Step 9 Position pilot tube and igniter sen...

Страница 38: ...erify the fastener holes of the combustion chamber are aligned with right side inner door slotted opening Verify seal integrity around combustion opening Secure right side inner door using hex drive s...

Страница 39: ...cting the condensate tee to the back cover and the vertical vent pipe Step 4 Remove the condensate tee Be aware that condensate is in the tee and take appropriate measures Step 5 Remove the bottom cap...

Страница 40: ...e port on the exhaust cover 3 With a 5 16 socket or wrench loosen the 8 screws sealing the cover to the gasket 4 Remove the cover and inspect the seal bead on the gasket flange as well as the seal aro...

Страница 41: ...that the studs extend through the openings e Hand start the nuts that were removed in step 3 onto the studs on all 8 locations to ensure a proper fit Begin securing the 5 16 nuts with an wrench or a...

Страница 42: ...ert 12 Hot Water Outlet 13 Inlet Diptube 14 Flue Baffle 15 Hex Head Anode 16 Vertical Vent Pipe 17 Flue Core 18 NPT Plug 19 T P Valve 20 Screw 21 Washer 22 Exhaust Cover 23 Condensate Tee 24 Exhaust G...

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