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FVIR System Operational Checklist
1. Manifold gasket properly sealed.
2. Viewport not damaged or cracked.
3. Flame-arrestor free of debris and undamaged.
4. Manifold component block properly installed.
5. No leaks at pilot and manifold connection.
6. Manifold door screws securely tightened.
7. Depress the button on the thermal switch
TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
BURNER WILL NOT IGNITE
1. Pilot not lit
2. Thermostat set too low
3. Main burner line clogged
4. Non-functioning
thermostat
5. Base-Ring Filter blocked with lint/
dust
6. Heater installed in a confined area
7. FVIR Flame Arrestor blocked with
lint/dust.
1. Light
pilot
2. Turn temp. dial to desired temperature
3. Clean, locate source and correct
4. Test Gas Control Valve/Thermostat
5. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
6. Provide fresh air ventilation
7. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
SMELLY WATER
1. Sulfides in the water
1. Replace the anode with a special anode
BURNER FLAME YELLOW-
LAZY
1. Insufficient combustion air
2. Low gas pressure
3. Water heater flue or vent system
blocked
4. Main burner line clogged
5. Base-Ring Filter blocked with lint/
dust
6. Heater installed in a confined area
7. FVIR Flame Arrestor blocked with
lint/dust.
8. Obstruction in main burner orifice
1. Provide ventilation to water heater
2. Check with gas utility company
3. Clean, locate source and correct
4. Clean, locate source and correct
5. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
6. Proper fresh air ventilation
7. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
8. Clean or replace orifice
PILOT WILL NOT LIGHT OR
REMAIN LIT
1. Non-functioning
igniter
2. The thermal switch tripped
3. Wire lead connection at thermal
switch loose
4. Thermopile connection loose
5. Air in gas line
6. Low gas pressure
7. No
gas
8. Dirt in gas lines
9. Cold
drafts
10. Thermostat temperature limit was ex-
ceeded. Status light will blink 4 flashes.
11. Pilot line or orifice clogged
12. Non-functioning thermopile
13. Air for combustion obstructed
14. FVIR Flame Arrestor blocked with
lint/dust
15. Flammable vapors incident, FVIR
function actuated
16. Base-Ring Filter blocked with lint/
dust
1. Replace igniter pilot assembly
2. See Pilot Light Troubleshooting Flowchart section
3. Remove and reconnect the wire leads at
thermal switch, confirm connections are tight
and not loose
4. Finger tighten; then 1/4 turn with wrench
5. Bleed the air from the gas line
6. Check with gas utility company
7. Check with gas utility company
8. Notify utility-install dirt trap in gas line
9. Locate source and correct
10. Replace thermostat
11. Clean, locate source and correct
12. Replace thermopile
13. See maintenance section for inspection and
cleaning of flame arrester
14. Clean filter, See “Cleaning the Combustion
Chamber and Flame-Arrestor” section.
15. Replace water heater, eliminate flammable
vapors source. Contact Technical Assistance.
16. Clean filter, See “External Inspection &
Cleaning of the Base-Ring Filter” section.
HIGH OPERATION COSTS
1. Thermostat set too high
2. Sediment or lime in tank
3. Water heater too small for job
4. Wrong piping connections
5. Leaking
faucets
6. Gas
leaks
7. Wasted hot water
8. Long runs of exposed piping
9. Hot water piping in exposed wall
1. Set temperature dial to lower setting
2. Drain/flush-provide water treatment if needed
3. Install adequate heater
4. Correct piping-dip tube must be in cold inlet
5. Repair
faucets
6. Check with utility-repair at once
7. Advise
customer
8. Insulate
piping
9. Insulate
piping
INSUFFICIENT HOT WATER 1. Thermostat set too low
2. Sediment or lime in tank
3. Water heater too small
4. Wrong piping connections
5. Leaking
faucets
6. Wasted hot water
7. Long runs of exposed piping
8. Hot water piping in outside wall
9. Low gas pressure
1. Turn temperature dial to desired setting
2. Drain/flush-provide water treatment if needed
3. Install adequate heater
4. Correct piping-dip tube must be in cold inlet
5 Repair
faucets
6. Advise
customer
7. Insulate
piping
8. Insulate
piping
9. Check with gas utility company
