John Wood Commercial - ANED - Manual (Page 16)

Page 15
LP (PROPANE) GAS MODELS
LP. GAS IS HEAVIER THAN AIR.
Should there be a leak in the system, the gas will settle
at FLOOR LEVEL. Basements, crawl spaces, closets and
areas below ground level will serve as pockets for the
accumulation of the gas.
Out Of Fuel
When your LP tank runs out of fuel, turn off gas at all gas
appliances. After LP tank is refilled, all appliances must be
re-lit according to the manufactures’ instructions.
MAINTENANCE INSTRUCTIONS
Venting System Inspection
Every three months, when inspecting the burner flame, an
inspection of the venting system should be made.
Check these points:
1. Are the draft hood relief openings free of obstruction?
2. Is the flue pipe securely attached?
3. Is the flue pipe cemented into the chimney or are
cracks and loose cement visible?
CORRECT ANY DEFECTS IMMEDIATELY
Burner Maintenance
At least every three months, check the burner and pilot
flames. The burner flames must be a soft blue flame with no
yellow tips. Yellow tips indicate a carbonizing flame which
can, depending on severity, deposit carbon (soot) on the
combustion chamber and flue passages.
1. The burner air openings (primary air) may need clean
ing. Observe if lint and dust have accumulated.
2. With a small brush, clear away lint and dust which may
have accumulated. Observe if any debris has fallen on
the burner which obstructs the burner ports. See Figure
5 for a view of a comparison of a good flame. If in
doubt, consult a competent serviceman or your local
gas company.
3. Turn thermostat dial up to turn burner “ON”
4. Loosen the air shutter retaining screw.
5. With a screw driver, lightly tap the air shutter and move
it in the more open direction (Figure 5)
6. If yellow flame disappears, tighten the screws, taking
care not to move air shutter again.
7. When flames appear normal (Figure 5) replace burner
access cover.
8. Turn thermostat down to the previous setting.
Tank Clean-Out
A) A clean-out opening is provided for periodic cleaning of
the tank. Gas must be shut off and the heater drained
before opening the clean-out.
B) To clean heater through the clean-out opening, proceed
as follows:
- remove outer door from side of the side of the casing.
- peel back the insulation covering the clean-out flange.
- remove the six (6) hex head screws securing the tank
clean-out plate and remove the plate.
- remove lime, scale or sediment using care not to
damage the glass lining of the tank.
- inspect the clean-out gasket, if it shows sign of wear a
new gasket is required.
- install the clean-out plate. Be sure to draw plate up
tight by tightening screws securely.
- position the insulation, and replace outer door.
NOTE:
In some areas where there is a lot of lime in the
water, the tank should be cleaned more frequently,
otherwise the heater will develop excess scale on the
bottom and cause a banging, rumbling or boiling
noise and will affect the recovery, operation and life of
the heater.
Figure 5
TOO LITTLE AIR.
YELLOW FLAME.
LIKE A CANDLE.
SHARP, CLEARLY DEFINED
INNER CONE, BLUE TIPS
CLOSED
INSUFFICIENT AIR
PRIMARY AIR
OPEN
ADJUST AIR SHUTTER
FOR GOOD FLAME
NOTE:
While moving the air shutter dust particles will be dis-
turbed and drawn into the burner causing a bright, lumi-
nous flame. This is temporary and must not be confused
with a yellow tipped, carbonizing flame. Carbonizing
flames are often called “candling” flames because they
look like flames from a burning candle
.