Water Heater Operation; Stacking; Water Heater Sounds; Smoke/Odour - John Wood JW6 F307 Installation And Operating Manual

Water Heater Operation

WARNING:
Keep the area around the heater clear and
unobstructed.

Stacking

Stacking occurs when a series of short draws of hot water
(11 litres (3 US gallons) or less) are taken from the water
heater tank. This causes increased cycling of the burner and
can result in increased water temperatures at the hot water
outlet. A tempering device is recommended in the hot water
supply line to reduce the risk of scald injury.

Water Heater Sounds

During the normal operation of the water heater, sounds or
noises may be heard. These noises are common and may
result from the following:
1. Normal expansion and contraction of metal parts during
periods of heat-up and cool-down.
2. Condensation causes sizzling and popping within the
burner area and should be considered normal.
3. Sediment buildup in the tank bottom will create varying
amounts of noise and may cause premature tank failure.
Drain and flush the tank as directed under "Draining And
Flushing".

Smoke/Odour

The water heater may give off a small amount of smoke and
odour during the initial start-up of the unit. This is due to
the burning off of oil from metal parts of a new unit and will
disappear after a few minutes of operation.

Anode Rod/Water Odour

Each water heater contains at least one anode rod, which
will slowly deplete while protecting the glass-lined tank from
corrosion and prolonging the life of the water heater. Once
the anode is depleted, the tank will start to corrode, eventually
developing a leak. Certain water conditions will cause a
reaction between this rod and the water. The most common
complaint associated with the anode rod is a "rotten egg smell"
produced from the presence of hydrogen sulfide gas dissolved
in the water. Do not remove this rod permanently as it will
void any warranties, stated or implied. A special anode can
be ordered if water odour or discolouration occurs. This rod
may reduce, if not eliminate, water odour problems. The water
supply system may require special filtration equipment from
water conditioning company to successfully eliminate all water
odour problems. Artificially softened water is exceedingly
corrosive because the process substitutes sodium ions for
magnesium and calcium ions. The use of a water softener
may decrease the life of the water heater tank. The anode rod
should be inspected every year. If the rod is more than 50%
depleted, the anode rod should be replaced.

V) MAINTENANCE

Do not attempt to repair your water heater. Call a qualified
Oil-Burner Technician for service. Turn "OFF" the electric
power whenever the water supply is shut off. Before calling
for service, check that:
1. The heater is properly filled.
2. The electrical supply has not been interrupted.

Professional Maintenance

Except for external appearance and area tidiness, the
following steps should be performed only by a qualified Oil-
Burner Technician.
1. Lift out the flue baffle to clean the flue. (On rear and
combination flue heaters, the top cover, insulation and
flue top cover must be removed.)
2. Insert a flue brush down the flue passage way(s) to remove
soot and dirt. Soot or carbon that falls into the combustion
chamber will burn up within a very short time.
3. In normal use, there should be no large accumulation of
soot in the combustion chamber. If there is, remove the
burner and carefully brush or vacuum the combustion
chamber.
Note: The combustion chamber is not a replaceable
component.
Have your oil filter cleaned or replaced by a qualified
technician at an interval recommended by your oil supplier.

Flue Pipes

Once a year, inspect the flue pipe leading from the heater to
the chimney. If corrosion is evident, or discolouration at the
joints can be seen, replace the flue pipes. This should be
done by a qualified Oil-Burner Technician. Flue pipes must be
replaced by the same size flue pipe as the flue collar (breech
connection) at the heater.

Combustion Tests

Burner adjustments:
Final burner adjustments must be made using combustion
test equipment to assure proper operation.
1. Fill heater with water. Do not fire heater without water or
sections will overheat.
2. Refer to burner manual for start-up.
3. Allow heater to heat to design condition.
4. Using combustion test equipment, adjust burner for:
a. CO2 between 11% and 12% and a trace of smoke
between No. 0 smoke and No. 1 smoke.
b. over-fi re draft -0.01 to -0.02 in. w.c. (-2.48 to -4.97Pa)
draft in combustion chamber (+0.25 in. w.c. (+6.22Pa)
for JW6 F307V).
Note: For JW6 F307V also see additional "Installation
Instructions for Through-the-wall Venting Components" that
is supplied with the JW6 F307V.
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