J952V Installation Manual

26
Proper maintenance is most important to achieve the best
performance from a furnace. Follow these instructions for
years of safe, trouble free operation.
• These maintenance instructions are primarily intended
to assist qualified technicians experienced in the proper
maintenance and operation of this appliance.
• Always reinstall the doors on the furnace after servicing or
cleaning/changing the filters. Do not operate the furnace
without all doors and covers in place.
• Verify that the thermostat is properly installed and is not
affected by drafts or heat from lamps or other appliances.
• To achieve the best performance and minimize equipment
failure it is recommended that a yearly maintenance
checkup be performed. At a minimum, this check should
include the following items:
Air Filter(s) - Air filter(s) are not supplied with the furnace
as shipped from the factory. The installer must provide a
high velocity filter and rack for a filter in the return air duct
adjacent to the furnace, or in a return air grill to the furnace.
WARNING:
Never operate the furnace without a filter in
place. Dust and lint in the return air can build
up on internal components, resulting in loss of
efficiency, equipment damage, and possible fire.
It is recommended that filters be 1” or 2” thick and be cleaned
or replaced monthly. New or newly renovated homes may
require more frequent changing until the construction dust
has minimized.
Filters designed to remove smaller particles such as pollen,
may require additional maintenance. Filters for side return
and bottom return applications are available from most local
distributors.
Blower Compartment - Dirt and lint can create excessive
loads on the motor resulting in higher than normal operating
temperatures and shortened service life. It is recommended
that the blower compartment be cleaned of dirt or lint that
may have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Cleaning of Burners - If the burners must be cleaned,
follow the steps below and see
Figure 36 (page 41) for
component location.
1. Shut off gas supply to the furnace either at the meter or
at a manual valve in the supply piping.
2. Turn off all power to the furnace and set the thermostat
to it’s lowest setting.
3. Remove the burner door from the furnace.
4. Turn the gas control switch to the OFF position.
5. Disconnect the wires from the gas valve, igniter, flame
sensor, and flame rollout switch.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
6. Using two wrenches, separate the ground-joint union in
the gas supply piping at the furnace.
7. Remove the piping between the Gas Valve and the ground-
joint union. (If applicable).
8. Remove all screws securing the Manifold Assembly to the
Burner Box.
9. Carefully remove the burner assembly from the furnace.
DO NOT DAMAGE THE IGNITER WHILE REMOVING
THE BURNER ASSEMBLY.
10. Inspect the burners for accumulated dust or debris. If
necessary carefully clean them with a soft wire brush and
a vacuum cleaner. DO NOT DAMAGE THE IGNITER
WHILE CLEANING THE BURNER.
11. Replace all the parts in reverse order from which they
were removed.
12. Follow the lighting instructions found on the furnace door
to return the furnace to operation. Verify proper operation
after servicing.
Heat Exchanger & Burner Maintenance - The furnace
should operate for many years without soot buildup in the
flue passageways, however, the flue, vent system, and
burners should be inspected and cleaned (if required) by a
qualified service technician annually to ensure continued safe
operation. Pay attention to any deterioration from corrosion
or other sources.
WARNING:
Holes in the vent pipe or heat exchanger can
cause combustion products to enter the home.
Replace the vent pipe or heat exchanger if leaks
are found. Failure to prevent the circulation of
combustion products into the living space can
create potentially hazardous conditions including
carbon monoxide poisoning that could result in
personal injury or death.
Lubrication - The bearings in the blower motor and inducer
blower used in these furnaces are pre-lubricated and sealed
by the manufacturer. No further oiling of the bearings is
required for the life of the motor.
Vent System - Check the inlet pipe (if applicable) and outlet
pipe to ensure they are not blocked by debris. Any damaged
section of vent pipe must be replaced, and any obstruction
or blockage must be removed prior to operating the furnace.