– 6 –
wheel for tight ness. Clean or replace the nozzle if necessary, al ways us ing the correct size and spray
angle pro vid ed by the man u fac tur er.
3. Bleed the pump to make sure the oil is clear and free of air bubbles. If the oil is milky or frothy, check
the line for air leaks at fittings. Check the oil filter gaskets and make sure the fil ter cartridge is clean.
4. If the burner motor does not run, check the motor thermal overload button (red) and reset. If the burn-
er
motor does not run after pushing the red button on the back of the motor, turn the motor off and
check the mo tor shaft to see if it is tight. Check the pump shaft; if it is free and the motor will not run,
replace the flame detector located in the burner hous ing. Turn on the current and re set the control
(relay). If the motor still does not run, replace the control (re lay). If motor hums and gets hot, re place
the
motor.
5. If the burner ignites and runs a short time (10 to 15 seconds) and goes out on safety, replace the
flame de tec tor. If the burner still runs only a short time, replace the control.
6. The smell of oil or combustion prod ucts may be caused by poor draft or lack of combustion air.
Remove and clean the electrode assembly and check the draft in the con nec tor di rect ly above the
heater
. There should be at least .01 inches W.C.. draft (pull) or greater.
Lime and sediment: Such ac cu mu la tions can be con trolled to an extent by softening the water. The
tank should be inspected every six months by draining the tank, removing the hand hole cover, and
making a visual check of the tank interior. If lime (or sediment) has ac cu mu lat ed, it should be removed
b
y use of a commercial lime dissolving chemical or by scraping loose the deposit and flushing it away
through the hand hole or drain.
Excessive pressure is controlled by the T&P relief valve. Water expands when heated and the extra
volume of water must have a place to go. If water cannot expand into the cold water line because of a
check valve, pressure builds as the water heats. The pressure relief valve opens, and dumps the extra
v
olume of water. If the relief valve is faulty or none has been in stalled, the tank can fail due to this ex -
ces sive pressure. Open the relief valve at least once a year to make sure the seat is not stuck.
Caution: Before opening the relief valve be certain that the discharge line directs the water away from
anything that could be damaged or would block the flow of water to the drain. Stand away from the out-
let
to avoid contact with the water.
Rods are in stalled in the head of the tank to help pre vent corrosion of the tank. When inspecting the
tank interior for lime or sediment ac cu mu la tions, also inspect the condition of the anode rods. When
either rod has eroded to about one third of its original diameter, it should be replaced.
V
ent system should be checked at least once a year for damage and/or block age.
If the water heater is to be shut off during cold weather, the tank and water lines should be drained to
prevent freezing and piping damage. Please see warning on hydrogen gas buildup on page 1. IMPOR-
TANT! The water heater warranty will be invalid if the tank fails due to excessive pressure, the ac cu -
m
u la tion of lime or sediment, corrosion, or freezing. The Bock Water Heaters warranty (back page)
explicitly doc u ments further causes of in vali da tion.
MAGNESIUM
ANODE RODS
FREEZING
Regular maintenance
will keep the water
heater operating at
peak efficiency. The
tank can fail prema-
turely from the
accumulation of lime
and sediment in the
bottom, excessive
pressure and/or cor-
rosion.
To Next Page
Loading...