Troubleshooting Guidelines - Lochinvar POWER VENTED GAS HEATERS Installation And Operating Manual

These guidelines should be utilized by a qualifi ed service agent.
PROBLEM
BURNER FLAME
TOO HIGH
FLAME BURNS
AT ORIFICE
INSUFFICIENT
HOT WATER
WATER IS TOO HOT
SLOW HOT WATER
RECOVERY
DRIP FROM
RELIEF VALVE
GAS CONTROL VALVE/
THERMOSTAT FAILS TO
SHUT OFF
SMELLY WATER
52

TROUBLESHOOTING GUIDELINES

POSSIBLE CAUSE(S)
1. Air inlets blocked
2. Insuffi cient secondary air
3. Orifi ce too large
1. Low gas pressure
2. Defective gas control valve/thermostat
1. Low gas pressure
2. Orifi ce too small
3. Thermostat set too low
4. Gas control error codes
5. Sediment or lime in tank
6. Water heater too small
7. Wrong piping connections
8. Leaking faucets
9. Wasted hot water
10. Long runs of exposed piping
11. Hot-water piping in outside wall
1. Thermostat is too high
2. Defective gas control valve/thermostat
1. Insuffi cient air/ fl ue blockage
2. Low gas pressure
3. Orifi ce too small
4. Thermostat set too low
5. Heater too small
6. Wrong piping connection
7. Wasted hot water
8. Flue clogged
9. Air inlets blocked
1. Pressure build-up
2. Heater stacking
3. Closed water system
4. Improperly seated valve
1. Defective gas control valve/thermostat
1. Sulfi des in water supply
2. Bacteria in water supply
3. 3.Incompatible anade
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CORRECTIVE ACTION
Unblock inlet air openings
Provide ventilation to water heater
Replace with correct orifi ce
Check with gas utility company
Replace gas control valve/thermostat
Check with gas utility company
Replace with correct orifi ce (see rating
plate)
Turn temperature knob to higher setting
Refer to gas control error codes
Drain/flush-provide water treatment if
needed
Install adequate heater
Correct piping: dip tube must be in cold
inlet
Repair faucets
Advise customer
Insulate piping
Insulate piping
Turn temperature knob to lower setting
Replace the gas control valve/
thermostat
Provide ventilation to water heater.
Check fl ue way, fl ue baffl e and burner
Check with gas utility company
Replace with correct orifi ce (see rating
plate)
Turn temperature knob to higher setting
Install adequate heater
Correct piping-dip tube must be in cold
inlet
Advise customer
Clean fl ue, locate source and correct
Unblock inlet air openings
Use a pressure-reducing valve and relief
valve
Lower the thermostat setting
See thermal expansion section
Check Relief valve for proper operation
(Do Not plug T&P valve)
Replace gas control valve/thermostat
Chlorination procedure
Chlorination procedure
Replace with anode appropriate for water
conditions