Flame Sensor (Qualified Servicer Only ); Igniter (Qualified Servicer Only ); Burners; Cleaning (Qualified Servicer Only ) - Amana GDH8 Installation Instructions Manual

F S (Q
LAME ENSOR UALIFIED
Under some conditions, the fuel or air supply can create a
nearly invisible coating on the flame sensor. This coating acts
as an insulator 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 1 to 6
microamps at 115 volts.
I (Q S
GNITER UALIFIED ERVICER
If the igniter and the surrounding air are at about 70°F and the
igniter wires are not connected to any other electrical compo-
nents, the resistance of the igniter should not exceed 75 ohms.
If it does, the igniter should be replaced.
B
URNERS
T
O PREVENT PERSONAL INJURY OR DEATH
INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY ADJUSTMENT
E
LECTRICAL COMPONENTS ARE CONTAINED IN BOTH COMPARTMENTS
C
ONTACT A QUALIFIED SERVICE AGENT AT ONCE IF AN ABNORMAL
FLAME APPEARANCE SHOULD DEVELOP
Periodically during the heating season, make a visual check of
the burner flames. Turn the furnace on at the thermostat. Wait
a few minutes, since any dislodged dust will alter the normal
flame appearance. Flames should be stable, quiet, soft and
blue with slightly orange tips. They should not be yellow. They
should extend directly outward from the burner ports without
curling downward, floating or lifting off the ports.
C (Q
LEANING UALIFIED
1. Shut off electric power and gas supply to the furnace.
2. Disconnect the rollout limit wires, flame sensor wire, and
disconnect the igniter plug.
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
. W
CONTROLS IRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
. V
OPERATION ERIFY PROPER OPERATION AFTER SERVICING
3. Remove four (4) screws securing the burner box top.
S O )
ERVICER NLY
O )
NLY
WARNING
,
DO NOT REMOVE ANY
.
S O )
ERVICER NLY
CAUTION
.
T
HE IGNITER IS FRAGILE AND CAN BE EASILY DAMAGED
CAUTION WHEN REMOVING THE BURNER BOX TOP
4. Remove the screws securing the burners to the burner
bracket. Remove the burners.
5. Use bottle brush to clean burner insert and inside of
burner.
6. Replace burner (opposite of removal). Ensure burners
are fully seated on burner bracket and are properly
aligned. Replace burner box top. Reconnect wiring.
7. Turn on electric power and gas supply to the furnace.
8. Check furnace for proper operation. Refer to "Operational
Checks" section to verify burner flame characteristics.
B L
EFORE EAVING AN
•
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
EPAIR AND
•
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
Natural Gas Orifice
Propane Gas Orifice
Burner
Hot Surface Igniter
Flame Sensor
Gas Manifold
Ignition Control
Blower Mounting Bracket
Pressure Switch
Pressure Switch Hose
Induced Draft Blower
Collector Box
34
CAUTION
.
I
NSTALLATION
P
EPLACEMENT ARTS
Blower/Collector Box Gasket
Primary Limit Switch
Rollout Limit Switch
Auxiliary Limit Switch
Heat Exchanger
Door Switch
Transformer
Blower Wheel
Blower Housing
Blower Cutoff
Blower Motor
Motor Mount Bracket
Capacitor
. U
SE EXTREME