TMG -HW41T Product Manual page 30

BOILER SYSTEM DIAGNOSTICS - Oil Burner Will Not Fire
PROBLEM
Not reaching rated pressure
flow
Thermostat on low setting
No or low fuel in tank
No air movement through
stack
Fuel in the fuel tank
Water in the fuel filter bowl
Debris in the fuel filter bowl
Water comes out drain at
bottom of tank
Cannot smell or see fuelat
stack
No fuel to bleed valve
WW W . T M G I ND U S T R I A L . C O M
POSSIBLE CAUSE
Not activating boiler controls
Thermostat set too low
Burner no getting adequate fuel
Low fuel shut-off control
activated.
No air being supplied
Contaminated fuelin the tank
Improper fuel in the tank
Low fuel shut-off sensor stuck or
faulty
Water in fuel supply
Clogged strainer
Clogged fuel nozzle
Clogged fuel line
Water in fuel supply
No fuel being supplied
Air leak to pump
Broken fuel line
Clogged fuel filter
Clogged fuel inlet line
Frozen fuel pump
Broken fuel pump coupling
SOLUTION
Correct the fluid problem first - See fluid systems diagnostics
Set thermostat to an output temperature requiring heating.
Check fuel and bring to proper levels. Inspect fuel tank for
water or debris.
Full featured equipment may have a shut off if fuel is low.
Ensure that the blower is working and that the air band or
damper is properly adjusted and in good repair.
Ensure that the proper clean fuel is being used. If not, siphon
any debris or water from the tank.
If the improper fuel is found in the tank, drain and rinse the
tank, then fill with proper fuel.
Check the sensor. The assembly may need to be removed to
un-stick the float or to replace it
completely.
Drain water from the tank promptly to prevent rusting. If fuel
delivery problems persist, check the fuel pump for rust.
If the fuel strainer or in-line filter is clogged, clean or replace.
Replace if there is any evidence of clogging or debris.
Check lines for clogging and clear if necessary.
Check only if no fuel in the filter bowl - Drain the tank and
check for rust. If problem persists, fuel pump should be
checked forrust.
Check fuel delivery and correct any problems.
Ensure that air is not entering through the lines or
connections.
Ensure that the fuel line is connected and is not
broken/punctured.
Check any clogging that exists in the fuel filter
Check any clogging that exists in the fuel inlet line.
If the fuel pump is frozen it will need replaced.
Check pump coupling if direct or belt driven. Replace or
tighten or replace the drive belts if needed.
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