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Manual 238

‐

51526

‐

00A

REV 08/18

SERVICE

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 Warranty Years

Through-The-Wall Gas Water Heaters

Condensing PV Series

http://waterheatertimer.org/power-vent-water-heater-troubleshoot.html

Содержание LC2PV50H76 series

Страница 1: ...d 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 Warranty Years Through The Wall...

Страница 2: ...cement 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 Simulative Resistive D...

Страница 3: ...ssional for more information CAUTION Turn off or disconnect the electrical power supply to the water heater before servicing Label all wires prior to disconnection when servicing controls Wiring error...

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: ...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 measure gas...

Страница 6: ...essure 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 Point Rang...

Страница 7: ...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 Straight Len...

Страница 8: ...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 Roof 0 1...

Страница 9: ...nd 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 PROCEDURE VI pag...

Страница 10: ...he 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 operation If the...

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: ...e 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 long as the...

Страница 13: ...ins 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 the ignitio...

Страница 14: ...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 Pressure swit...

Страница 15: ...xidation 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 installa...

Страница 16: ...uses 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 fully engulfing the spark flame...

Страница 17: ...bustion 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 Step 9 Remove the main burner...

Страница 18: ...p 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 carefully adjust the electrode...

Страница 19: ...inuity 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 close with blower...

Страница 20: ...emove 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 switch Step 7 Carefully position...

Страница 21: ...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 pressure switch testing Page...

Страница 22: ...n 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 Secure blower i...

Страница 23: ...peration Does the exhaust gas temperatures rise to or above 160 F with vent connected Switch OK Do switch contacts open Switch Setting Opens on rise approximately 155 F Auto resets on fall approximate...

Страница 24: ...ing 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 seated in the mounting area Step 7 Re...

Страница 25: ...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 Proper operating range for Pr...

Страница 26: ...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 normal operation Confirm that...

Страница 27: ...al 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 NOT use a wrench on the gas...

Страница 28: ...acket 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 6b DO NOT OVER TIGHTEN SCREWS...

Страница 29: ...nt 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 ohms and 48 000 ohms If outside of t...

Страница 30: ...e 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 terminal and the green ground sc...

Страница 31: ...shown in photo 19 Locate black white wires at connector it may be necessary to pull back wire sheath to identify wire colors see photo 22 Replace Blower Check for damage to AC power supply cord Using...

Страница 32: ...let 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 restriction due to deformatio...

Страница 33: ...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 anode diameter approximatel...

Страница 34: ...ve 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 perimeter of the top...

Страница 35: ...g 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 blower housing Screw the blower sec...

Страница 36: ...is not required If replacement is required proceed to Inner Door Gasket Replacement Procedure Inner Door Gasket Replacement Procedure Step 5 After inspection of the inner door as noted in step 4 compl...

Страница 37: ...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 sensor wire against left side inner door...

Страница 38: ...tion chamber are aligned with right side inner door slotted opening Verify seal integrity around combustion opening Secure right side inner door using hex drive screws from step 3a DO NOT OVER TIGHTEN...

Страница 39: ...over 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 of the condensate tee and verify that...

Страница 40: ...the secondary flue tubes Inspect the gasket to make sure there are no cuts or openings in the balance of the gasket body 5 If the gasket is necessary to be removed and replaced follow the steps below...

Страница 41: ...ies 41 6 Once all the flange nuts are back in place reconnect the clear tubing onto the port on the cover 7 Connect the condensate tee and coupler to the neck provided on the cover and secure by tight...

Страница 42: ...2 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 Gasket...

Страница 43: ...43...

Страница 44: ......

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