John Wood Atmospheric Gas (Standard) - Manual (Page 30)

30
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
SLOW HOT WATER
RECOVERY
1. Insufficient combustion air
2. Water heater flue or vent system
blocked
3. Low gas pressure
4. Improper calibration
5. Base-Ring Filter blocked with lint/
dust
6. FVIR Flame Arrestor blocked with
lint/dust.
1. Provide ventilation to water heater. Check
flue way, flue baffle, and burner
2. Clean flue, locate source and correct
3. Check with gas utility company
4. Replace thermostat
5. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
6. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
DRIP FROM RELIEF VALVE 1. Excessive water pressure
2. Heater stacking
3. Closed water system
1. Use a pressure reducing valve and relief
valve
2. Lower the thermostat setting
3. See “Closed System/Thermal Expansion”
THERMOSTAT FAILS TO
SHUT-OFF
1. Thermostat not functioning prop-
erly
2. Improper calibration
1. Replace thermostat
2. Replace thermostat
COMBUSTION ODORS 1. Insufficient combustion air
2. Water heater flue or vent system
blocked
3. Heater installed in a confined area
4. Base-Ring Filter blocked with lint/
dust
5. FVIR Flame Arrestor blocked with
lint/dust.
1. Provide ventilation to water heater. Check
flue
way, flue baffle, and burner
2. Clean, locate source and correct
3. Provide fresh air ventilation
4. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
5. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
SMOKING AND CARBON
FORMATION (SOOTING)
1. Insufficient combustion air
2. Low gas pressure
3. Water heater flue or vent system
blocked
4. Thermostat not functioning prop-
erly
5. Heater installed in a confined area
6. Burner flame yellow-lazy
7. Base-Ring Filter blocked with lint/
dust
8. FVIR Flame Arrestor blocked with
lint/dust.
1. Provide ventilation to water heater. Check
flue way, flue baffle, burner
2. Check with gas utility company
3. Clean, locate source and correct
4. Replace thermostat
5. Provide fresh air ventilation
6. See “Burner Flame Yellow-Lazy”
7. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
8. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
CONDENSATION 1. Temperature setting too low 1. Increase the temperature setting. Refer
to the “Condensation” sub-section of this
manual’s Troubleshooting Guide.
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
1. Orifice too large
2. High gas pressure
3. Water heater flue or vent system
blocked
4. Cold drafts
1. Replace with correct orifice
2. Check with gas utility company
3. Clean flue and burner-locate source and cor-
rect
4. Locate source and correct
BURNER FLAME TOO HIGH 1. Orifice too large 1. Replace with correct orifice
FLAME BURNS AT ORIFICE 1. Thermostat not functioning prop-
erly
2. Low gas pressure
1. Replace thermostat
2. Check with gas utility company
PILOT FLAME
TOO SMALL
1. Pilot line or orifice clogged
2. Low gas pressure
1. Clean, locate source and correct
2. Check with gas utility company