36
M
M
M
M
M
I S C E L L A N E O U S
I S C E L L A N E O U S
I S C E L L A N E O U S
I S C E L L A N E O U S
I S C E L L A N E O U S
To remove filters from an external filter rack in an upright upflow
installation, follow the directions provided with external filter rack
kit.
H
H
H
H
H
ORIZONTAL
ORIZONTAL
ORIZONTAL
ORIZONTAL
ORIZONTAL
U
U
U
U
U
NIT
NIT
NIT
NIT
NIT
F
F
F
F
F
ILTER
ILTER
ILTER
ILTER
ILTER
R
R
R
R
R
EMOVAL
EMOVAL
EMOVAL
EMOVAL
EMOVAL
Filters in horizontal installations are located in the central return
register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.
M
M
M
M
M
EDIA
EDIA
EDIA
EDIA
EDIA
A
A
A
A
A
IR
IR
IR
IR
IR
F
F
F
F
F
ILTER
ILTER
ILTER
ILTER
ILTER
OR
OR
OR
OR
OR
E
E
E
E
E
LECTRONIC
LECTRONIC
LECTRONIC
LECTRONIC
LECTRONIC
A
A
A
A
A
IR
IR
IR
IR
IR
C
C
C
C
C
LEANER
LEANER
LEANER
LEANER
LEANER
R
R
R
R
R
EMOVAL
EMOVAL
EMOVAL
EMOVAL
EMOVAL
Follow the manufacturer’s directions for service.
B
B
B
B
B
URNERS
URNERS
URNERS
URNERS
URNERS
Visually inspect the burner flames periodically during the heating
season. Turn on the furnace at the thermostat and allow several
minutes for flames to stabilize, since any dislodged dust will alter
the flames normal appearance. Flames should be stable, quiet, soft,
and blue (dust may cause orange tips but they must not be yellow).
They should extend directly outward from the burners without curl-
ing, floating, or lifting off. Flames must not impinge on the sides of
the heat exchanger firing tubes.
IIIII
NDUCED
NDUCED
NDUCED
NDUCED
NDUCED
D
D
D
D
D
RAFT
RAFT
RAFT
RAFT
RAFT
AND
AND
AND
AND
AND
C
C
C
C
C
IRCULATOR
IRCULATOR
IRCULATOR
IRCULATOR
IRCULATOR
B
B
B
B
B
LOWERS
LOWERS
LOWERS
LOWERS
LOWERS
The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No further
lubrication is required. Check motor windings for accumulation of
dust which may cause overheating. Clean as necessary.
F
FF
F
F
LAME
LAME
LAME
LAME
LAME
S
S
S
S
S
ENSOR
ENSOR
ENSOR
ENSOR
ENSOR
(Q
(Q
(Q
(Q
(Q
UALIFIED
UALIFIED
UALIFIED
UALIFIED
UALIFIED
S
S
S
S
S
ERVICER
ERVICER
ERVICER
ERVICER
ERVICER
O
O
O
O
O
NLY
NLY
NLY
NLY
NLY
)))))
Under some conditions, the fuel or air supply can create a nearly
invisible coating on the flame sensor. This coating acts as an insula-
tor causing a drop in the flame sense signal. If the flame sense
signal drops too low the furnace will not sense flame and will lock
out. The flame sensor should be carefully cleaned by a qualified
servicer using emery cloth or steel wool. Following cleaning, the
flame sense signal should be as indicated in the Specifications Sheet.
F
FF
F
F
LUE
LUE
LUE
LUE
LUE
P
P
P
P
P
ASSAGES
ASSAGES
ASSAGES
ASSAGES
ASSAGES
(Q
(Q
(Q
(Q
(Q
UALIFIED
UALIFIED
UALIFIED
UALIFIED
UALIFIED
S
S
S
S
S
ERVICER
ERVICER
ERVICER
ERVICER
ERVICER
O
O
O
O
O
NLY
NLY
NLY
NLY
NLY
)))))
The heat exchanger flue passageways should be inspected at the
beginning of each heating season. If necessary, clean the passage-
ways as outlined below.
1. Turn OFF the electrical power and gas supply to the furnace.
2. Disconnect the gas line and remove the burner/ manifold
assembly by removing the screws securing the assembly to
the partition panel.
3. Disconnect the flue pipe system from the induced draft
blower.
4. Remove the induced draft blower and collector box cover.
5. Clean the primary heat exchanger tubes using a wire brush
attached to a length of high grade stainless steel cable, such
as drain cleanout cable. Attach a variable speed reversible
drill to the other end of the cable. Slowly rotate the cable
with the drill and insert it into one of the heat exchanger
tubes. While reversing the drill, work the cable in and out
several times to obtain sufficient cleaning. Repeat for each
tube.
6. Clean residue from furnace using a vacuum cleaner.
7. Replace the parts removed in the previous steps in reverse
order.
8. Turn on electrical power and gas to furnace. Check for leaks
and proper unit operation.
9. Severe heat exchanger fouling is an indication of an
operational problem. Perform the checks listed in
Startup
Procedure and Adjustments
to reduce the chances of
repeated fouling.
B
B
B
B
B
E F
E F
E F
E F
E FO R E
O R E
O R E
O R E
O R E
L
L
L
L
L
E A
E A
E A
E A
E AVING
VING
VING
VING
VING
A N
A N
A N
A N
A N
I
I
I
I
I
N S T
N S T
N S T
N S T
N S TALL
A L L
A L L
A L L
A L LA
A
A
A
ATION
TION
TION
TION
TION
•
Cycle the furnace with the thermostat at least three times.
Verify cooling and fan only operation.
•
Review the Owner’s Manual with the homeowner and discuss
proper furnace operation and maintenance.
•
Leave literature packet near furnace.
R
R
R
R
R
E P
E P
E P
E P
E PAIR
AIR
AIR
AIR
AIR
A N D
A N D
A N D
A N D
A N D
R
R
R
R
R
E P L
E P L
E P L
E P L
E P LA
A
A
A
ACEMENT
CEMENT
CEMENT
CEMENT
CEMENT
P
P
P
P
P
A R
A R
A R
A R
A RT
T
T
T
T S
S
S
S
S
•
When ordering any of the listed functional parts, be sure to
provide the furnace model, manufacturing, and serial
numbers with the order.
•
Although only functional parts are shown in the parts list, all
sheet metal parts, doors, etc. may be ordered by description.
•
Parts are available from your distributor.
Functional Parts List-
Gas Valve
Blower Motor
Gas Manifold
Blower Wheel
Natural Gas Orifice
Blower Mounting Bracket
Propane Gas Orifice
Blower Cutoff
Igniter
Blower Housing
Flame Sensor
Inductor
Rollout Limit Switch
Heat Exchanger
Primary Limit Switch
Auxiliary Limit Switch
Pressure Switch
Integrated Control Module
Induced Draft Blower
Transformer
Door Switch
