PVI Industries PV500-2 دليل المستخدم

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PVI ATMOSPHERIC GAS WATER HEATERS
TYPICAL CONSTRUCTION
MANUFACTURED AFTER JANUARY 1, 1994


Figure 2-1

1. Vent stack * 7. Control switch(es) and fuse(s)
2. Draft diverter (hood) 8. Gas valve
3. Flue damper (on some models) 9. Pilot line
4. Temperature limiting device 10. Drip leg *
(set at 200°F) 11. Gas supply line *
5. Upper operating thermostat 12. Handhole cleanout
(set at 130°F)

6. Operating thermostat
(set at 120°F) (* Not furnished by PVI)


CAUTION: TEMPERATURES

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ELECTRICAL Typical 24 Volt Control System with Damper 1. Wiring to the unit should conform to the National Electrical Code or the code legally authorized in your locality. A fused disconnect switch should be used for the water heater control. 120V, 1ph, 60 Hz service wiring is brought to the terminal block in the lower part of the enclosure on the water heater. See Figures 2- 2, 2-3 and 2-4. FOR YOUR SAFETY USE ONLY COPPER WIRE OF PROPER SIZING FOR INCOMING SERVICE. DAMAGE

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START-UP PROCEDURES AND OPERATION 1. Some PVI atmospheric gas-fired water heaters are 3. Remove the control box cover to access the control designed to operate with a flue damper that is thermostats and other electrical devices needed to shipped with the water heater for installation in the operate the water heater. The thermostats are labeled field. If your water heater was shipped with a flue as to their function. The temperature limiting device is damper, it must be attached to the f

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START-UP PROCEDURES AND OPERATION (con't) CAUTION: CONDUCT THE FOLLOWING GAS TRAIN 6. The flue damper is closed. LEAKAGE TESTS BEFORE START-UP, AT ANNUAL INTERVALS AND PRIOR TO NOTE: The spark ignition system provides additional INVESTIGATING THE CAUSE OF ANY REPORTED safety functions to close the pilot valve if the pilot OCCURENCES OF DELAYED IGNITION. flame is not established and to close the main burner valve if the pilot flame is extinguished while the 1. Using an appropriate bubb

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4. After 20 to 30 minutes of operation or when water in COMBINATION GAS VALVE the tank is above 120°F, insert CO (carbon monoxide) tester in flue damper opening under the draft diverter (125 gallon models) or in the flue collector opening (250 gallon models). CO reading must be less than .02% (or 200 ppm). 5. Insert CO (carbon dioxide) tester in the flue damper 2 opening under the draft diverter (125 gallon models) or in the flue collector opening (250 gallon models) and take readi

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MAINTENANCE AND SAFETY INSPECTIONS To Minimize Scale Accumulation in Tank Periodic Inspection of Operational Components 1. A preventative maintenance program should be Periodic inspections and check-out of the burner established to assure a long, trouble-free life of the ignition system, control system and gas valve water heater. operation should be made and recorded for future reference. 2. The tank should be flushed at two or three month intervals depending on water conditions in

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MAINTENANCE AND SAFETY INSPECTIONS (con't) Taking the Water Heater Out of Service c. Tag power switch(es) indicating that fuel is off and tank is empty. Extended shutdown of the appliance and restarting instructions are as follows: d. To restart, refill tank with water and turn fuel a. Turn off all power and fuel supplies. and power switch(es) on. Reset all controls and conduct start-up of the appliance as b. Drain and flush tank as previously discussed. discussed on preceding pag