Burner Troubleshooting Guide

Transcription

1 IMMEDIATE RESPONSE TECHNOLOGIES, INC. Burner Trubleshting Guide Flash Water Heater (all standard types) Created By: Stefan Swan Infrmatin in this guide was deemed technically accurate at the time f printing. Hwever, updates are made peridically t the infrmatin herein and this guide culd cntain technical inaccuracies r typgraphical errrs. If yu have cmments r suggested changes please frward them t Immediate Respnse Technlgies, Inc. Infrmatin included herein belngs t Immediate Respnse Technlgies, Inc. N reprductin r publicatin f this dcument in whle r in part shall be made withut written authrizatin frm Immediate Respnse Technlgies, Inc.

2 This is a general guide sheet fr trubleshting a flash water heater that is nt lighting. This guide als includes a prcess fr remving air (bleeding) frm the fuel lines and the fuel pump. This is nly a guide and illustratins may r may nt differ frm actual mdels. Nte: Befre yu begin trubleshting, verify that all setup instructins have been crrectly fllwed, including using the crrect fuel and/r pwer surce. Cautin: Please nte that wrking with fuel and mechanical equipment can be hazardus. Mishandling r misuse can cause damage and/r harm t the peratr. Please take adequate precautins t ensure safety, while wrking n/r with the equipment. Seek a certified technician fr repair r service if yu are nt qualified r d nt have the crrect tls t perfrm these tasks. Lcate the cntrl panel (1) and Fuel pump and Fuel Filter n the bttm side f the water heater (2). These are the main areas where yu will be wrking. Bth lcatins are circled in Figure Figure 1. Water Heater Wrk Lcatins Trubleshting Discnnect water supply line frm the water heater t ensure that there will nt be water flw thrugh the system while bleeding prcess is being perfrmed. If the flw switch senses flw Page 2 f 8

3 while the burner switch is turned n, the slid state relay will allw the burner t ignite while wrk is being perfrmed n the fuel system. If prper precautin is nt taken, this culd cause damage t the equipment r injury t the peratr. Plug the yellw electrical wire int an electrical utlet. Make sure the GFCI is in the n psitin (signified by a green light in the GFCI husing). Turn the switch, lcated n the cntrl panel shwn in figure 2, t the ON psitin. Figure 2. Burner Switch Is the blwer fan perating (Air flwing frm the tp f the water heater stack)? YES : Mve t the next questin. NO: 1) There may be a brken cnnectin in the drive mtr wiring. Check all cnnectins fr mtr inside r utside f the cntrl panel. (See belw fr pening the cntrl panel.) 2) Faulty Mtr Need Replacement Is there a buzzing nise (The sund f the igniter attempting t light)? YES: Mve t the next questin. NO: Page 3 f 8

4 1) There may be a brken cnnectin in the igniter wiring. Check all wiring cnnectins fr mtr inside r utside f the cntrl panel. (See belw fr pening the cntrl panel.) 2) Faulty igniter Need Replacement Is the fuel mving in the bttm f the fuel filter? The fuel filter is shwn in figure 3. YES: Check t make sure that fuel is getting t the nzzle line n the high pressure side f the pump. See bleeding prcedure belw. Figure 3. Fuel Filter NO: 1) If fuel is seen cming frm the fitting, shwn in figure 6, n the high pressure side f the pump, then the nzzle r nzzle line may be clgged. Turn ff the burner and unplug the water heater. Clear all tubing frm the nzzle tip t the cnnectr tube assembly. See manual and/r cnsult certified technician. If the water heater still is nt lighting, mve t the next questin. 2) If fuel is nt seen cming frm the fitting, shwn in figure 6, then the cnnectr tube assembly n the high pressure side f the pump may be clgged. Turn ff the burner and unplug the water heater. Clear all tubing frm the pump utlet t the nzzle line (up t the fitting). See manual and/r cnsult certified technician. If the water heater still is nt lighting, mve t the next questin. Page 4 f 8

5 1) Check fr leaks and make sure fuel lines are cnnected t the fuel supply. Secure, perfrm bleeding prcedure, and then try t light burner again. 2) There may be air in the fuel line and/r fuel pump. Need t perfrm bleeding prcedure. See belw. 3) May be faulty pump r cupling Need Replacement. Open the cntrl panel, remving screws hlding the cver in place, being careful nt t damage gasket while remving. Secure screws fr replacement after trubleshting steps. Yu will nw need a Vltmeter fr testing the flw switch and fuel slenid. In rder t perfrm these tests yu will need t cnnect and pen the water supply. Yu will need t establish a minimum flw f 2 GPM. With the burner switch in the ON psitin, what is the temperature reading n the temperature cntrller display, shwn in figure 4? (This is the temperature f the ht side f the flw) Figure 4. Temperature Cntrller Display Is OP1 bx n the left side f the temperature cntrller display lit? YES: Mve t the next questin. NO: If the temperature reading n the temperature cntrller is less than 110 degrees Fahrenheit and OP1 is nt lit, the temperature cntrller may be Page 5 f 8

6 cnfigured incrrectly r be faulty. Cnsult certified technician fr recnfiguring r replacement. Lcate the slid state relay, marked relay n the water heater wiring diagram. Verify that the minimum flw f water has been established. Use Vltmeter t measure vltage acrss slid state relay terminals A1 and A2. Is the vltage reading acrss these terminals apprximately 120 VAC? YES: The flw switch is peratinal. Mve t the next questin. NO: If reading shws little r n vltage, flw switch may be stuck r faulty. Turn supply water ff and then n in rapid successin r lightly tap the flw switch several times with a rubber mallet. If this cnditin persists, replace flw switch. Nw t test the fuel slenid, measure the vltage acrss the terminal marked T1 n the slid state relay and the terminal t the right f the grund terminal n the bttm rw f the terminal strip. This lcatin is shwn by the red arrw in figure 5. Figure 5. Terminal fr Fuel slenid measurement n Terminal Strip Is the vltage reading acrss these terminals apprximately 120 VAC? YES: Mve t the next questin. NO: The fuel slenid may be faulty. Need Replacement. Page 6 f 8

7 If yu have reached this step, the slid state relay, may be faulty. The vltmeter cannt be used t accurately test the slid state relay, therefre, have a certified technician test and/r replace the slid state relay as needed. If burner still des nt light at this pint, it is recmmended that the water heater unit be returned t the factry fr further evaluatin and qute f repair. Bleeding the Fuel Pump Befre bleeding the fuel pump, check the fllwing items t determine whether bleeding the fuel lines and pump is needed by answering the questins related t the fuel abve. Make sure the water heater is plugged in and the GFCI is active. The water supply shuld be shut ff r discnnected. Fllw the belw steps t make sure that fuel is getting t the nzzle line n the high pressure side f the pump. Be careful when ding s, as fuel is under pressure. 1) Place a suitable cntainer under the fitting shwn in figure 6. Figure 6. Fitting n High pressure side f pump 2) Turn the burner switch t the n psitin. 3) Lsen the fitting slwly as shwn in figure 6 using the apprpriate wrench size. Yu shuld nt have t lsen the fitting cmpletely t identify if fuel is getting t this side. If yu d nt see fuel frm this, cntinue t the next step. If fuel is cming frm this fitting, see abve. Page 7 f 8

8 4) Lcate the bleeder valve n the bttm f the water heater, shwn in figure 7. Place cup r ther cntainer under the bleeder valve pening t catch any fuel that will leak frm the bleeder valve cnnectin. 5) Open the valve, using an apprpriate sized wrench, by turning the stem a quarter turn. Figure 7. Bleeder Valve Prt 6) Once a steady stream f fuel is seen cming frm the bleeder prt, clse the prt, and mve all cntainers. The bleeding prcedure is cmplete. 01/12 by Immediate Respnse Technlgies, Inc., Glenn Dale, Maryland. All rights Page 8 f 8