Operation; Burner Flames; Operational Conditions; Condensation - John Wood POWER VENTED GAS FIRED WATER HEATER Installation And Operating Instructions Manual

OPERATION

Burner Flames

Inspect the burner fl ames through the viewport and compare
them to the drawings in Figure 36. A properly operating burner
should produce a soft blue fl ame. Blue tips with light blue inner
cones are satisfactory. The tips of the fl ame may have a slight
yellow tint. The fl ame should not be all yellow or have a sharp
blue-orange colour. Contaminated air may cause an orange
coloured fl ame. Contact a qualifi ed service technician if the
fl ame is not satisfactory.
BLUE TIPS (NAT. GAS),
BLUE FLAME WITH
YELLOW TIPS (LP GAS)
LIGHT BLUE INNER
CONES ARE
SATISFACTORY
CORRECT FLAME
SOFT BLUE
Figure 36

Operational Conditions

Condensation

Moisture from the products of combustion condenses on the
tank surface and forms drops of water that may fall onto the
burner or other hot surfaces. This will produce a "sizzling" or
"frying" noise. This condensation is normal and should not
be confused with a leaking tank. Condensation may increase
or decrease at different times of the year. High effi cient
energy saver water heaters will produce larger amounts of
condensation on initial start-up or when a large amount of hot
water is being used. Do not confuse this with a "tank leak".
Once the water reaches operating temperature and the tank
warms up (usually 1 hour), the condensation will stop.
Important: It is always recommended that a suitable drain pan
be installed under the water heater to protect the area from
water damage resulting from condensation, a leaking tank or
piping connections. Refer to "Location Requirements". Under
no circumstances is the manufacturer to be held responsible
for any water damage in connection with this water heater.

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 sulfi de gas dissolved
INCORRECT
in the water. Do not remove this rod permanently as it will
FLAME LAZY
void any warranties, stated or implied. A special anode can
YELLOW
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 fi ltration equipment
from water conditioning company to successfully eliminate all
water odour problems.

"Air" In Hot-water Faucets

HYDROGEN GAS: Hydrogen gas can be produced in a hot-
water system that has not been used for a long period of time
(generally two weeks or more). Hydrogen gas is extremely
fl ammable and explosive. To prevent the possibility of injury
under these conditions, it is recommended that the hot-water
faucet, located farthest away, be opened for several minutes
before any electrical appliances which are connected to the
hot-water system are used (such as a dishwasher or washing
machine). If hydrogen gas is present, there will probably be
an unusual sound similar to air escaping through the pipe as
the hot-water faucet is opened. There must be no smoking or
open fl ame near the faucet at the time it is open.
– 26 –
WARNING
Explosion Hazard
• Flammable hydrogen gases may
be present.
• Keep all ignition sources away
from faucet when turning on hot
water.