Cleaning Instructions, Flue Passages Of; Shut Down For Extended Periods; Re-Starting The Heater After Shut-Down - John Wood JW6 F307 Installation And Operating Manual

Cleaning Instructions, Flue Passages Of The JW F657
Heater
Refer to Figure 14 for components of the heater.
1. Remove the casing top and lift the insulation off completely.
It is necessary to disconnect the hot and cold water lines
and move them out of the way. Do not remove the nipples
from the tank.
2. Lift off the flue collector. The flue collector has a lip on
the outer edge which will allow a hook to grab the edge
to help lift it up.
3. Remove the flue baffles (4).
4. With a 76mm (3 in.) diameter wire brush, 1.2m (4 ft.) long,
remove any soot build-up which may be on the top head
or inside the flue collector.
5. Reassemble in reverse order. It may be necessary to
replace the gaskets around the nipples to seal them at the
flue collector. Replace the insulation and the casing top.
6. Reconnect the plumbing lines.
WIRE BRUSH
HOOK
FLUE
COLLECTOR
NIPPLES
Figure 14 Cleaning Flue Passages Of The JW F657
Heater

Shut Down For Extended Periods

When away for extended periods of time such as vacation,
and no freezing temperatures are expected:
1. Shut off the oil supply at the tank.
2. Shut off the cold water supply to the heater.
3. Turn "OFF" the electrical supply to the water heater.
4. Open an upstairs hot water faucet (to relieve any pressure).
When freezing temperatures are expected:
1. Shut off the oil supply at the tank.
2. Shut off the cold water supply to the heater.
BAFFLE
CASING TOP
INSULATION
NOTE: It is recommended that all water lines
in the home be drained. Contact a qualified
plumber for directions applicable to the
heater.
3. Turn "OFF" the electrical supply to the water heater.
4. Connect a hose to the drain valve and drain as directed
in "Draining And Flushing".
5. Leave the drain hose attached as a reminder that the tank
has no water in it.

Re-Starting The Heater After Shut-Down

Caution: Hydrogen gas can be produced in a hot water
system served by this heater that has not been used for a long
period of time (generally two (2) weeks or more). Hydrogen
gas is extremely fl ammable and can ignite when exposed
to a spark or fl ame. To reduce the risk of injury under these
conditions, it is recommended that the hot water faucet be
opened for several minutes at the kitchen sink before using
any electrical appliance connected to the hot water system.
Use caution in opening faucets. If hydrogen is present, there
will probably be an unusual sound such as air escaping
through the pipe as the water begins to fl ow. There should be
no smoking or open fl ame near the faucet at the time it is open.
1. Follow instructions for "Filling The Water Heater" and
"Startup" when heater is ready to be put back into service.
2. If the heater does not start, check to see if the relay on
the burner has tripped. Reset if necessary. Check to see
if the thermostat is set at "Normal" or "High".
3. If the heater does not start:
a. Turn "OFF" the electrical supply to the water heater.
b. Shut off the oil supply at the tank.
c. Call a qualifi ed Oil-Burner Technician.
– 22 –
WARNING
Explosion Hazard
• Flammable hydrogen gases may
be present.
• Keep all ignition sources away
from faucet when turning on hot
water.