Table of Contents
Advertisement
building.
Turn on clothes dryers and any other appliance
not connected
to the venting
system.
Turn on any exhaust fans such as range hoods and bathroom
exhausts,
so they shall operate at
their maximum
speed. DO NOT operate a summer
exhaust
fan (whole house fan). Close fireplace
dampers;
d) Follow lighting instructions.
Place the appliance
being inspected
in operation.
Adjust the
thermostat
so the appliance
shall operate continuously;
e) Test for draft hood equipped
appliance
spillage at the relief opening
after five (5) minutes
of
burner operation.
Use the flame of a match or candle;
f) After it has been determined
that each appliance
connected
to the venting system properly
vents when tested as outlined
above, return all doors, windows,
exhaust
fans, fireplace
dampers
and any other gas-burning
appliance
back to their previous
condition
of use;
g) If improper
venting is observed
during any of the above tests, the venting system must be
corrected.
If resizing
of the existing vent is required this shall be sized in accordance
with Appendix
G of the
National
Fuel Gas Code, ANSI Z223.1 or CAN/CGA
B149 Installation
Codes.
I
INSPECTING
& CLEANING
THE HEAT EXCHANGER
]
CAUTION
I
Label all wires prior to disconnection
when servicing
controls. Wiring
errors can cause dangerous
I
and improper
operation.
Verify proper operation
after servicing.
I
It is the obligation
of the installer to advise the user to have the furnace
inspected
and cleaned
annually.
To clean the heat exchanger
perform the following:
•
Adjust the room thermostat
to its lowest setting.
•
Turn off the gas and electric supply to the furnace.
•
Remove
the control access door.
•
Open the gas supply union.
•
Disconnect
the gas supply line attached
to the gas valve.
•
Remove
the wires connected
to the gas valve.
•
Remove
the burner box assembly.
Care must be exercised
to avoid damage to the igniter.
•
Inshot burners should not require cleaning.
However,
if they exhibit signs of corrosion
they can
be cleaned by brushing
with a stiff wire brush.
•
Remove
the vent from the furnace venter blower.
•
Remove
the venter blower and collector
box.
•
With a stiff wire brush on a flexible handle, remove any loose scale from the heat exchanger
at
both the flue and burner openings.
•
Use a 1/2" diameter
brush to remove any deposits
in the secondary
heat exchanger.
•
With a vacuum
remove any loose scale dislodged
and any additional
debris found in the heat
exchanger.
•
Visually
inspect the heat exchanger
cells for any cracks or openings
using a bright light.
•
If any failures are discovered
it is important
to disable the furnace
and notify the user to
ensure that it remains
inoperable
until repairs are implemented.
IO-151
20
Hide quick links:
Advertisement
Table of Contents
