Goodman Amana AMH8 Service Instructions Manual page 63

SERVICING
HIGH VOLTAGE
D ALL
ISCONNECT POWER BEFORE SERVICING OR
M
INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY
F
BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
1. Disconnect the orange flame sensor wire from the
sensor .
2. Connect a micro-amp meter in series with this wire
and the sensor terminal.
3. Place the unit into a heating cycle.
WARNING
L
INE VOLTAGE NOW PRESENT
4. As soon as flame is established a micro-amp reading
should be evident once proof of flame (micro-amp
reading) is established, the hot surface ignitor will
be de-energized.
PRESSURE SWITCH CHART
*MH80403A*BB
*MH80603A*BB
*MH80604B*BB
*MH80803B*BB
*MH80804B*BB
*MH80805C*BB
*MH81005C*BB
GDH80403A***
GDH80603A*AA
GDH80804B***
GDH81005C*AA
GDH81005C*B*
ADSH800403AXAA
ADSH800603AXAA
ADSH800804BXAA
ADSH801005CXAA
WARNING
*MH8 / GDH8 / ADSH8 Pressure Switch Trip Points And Usage Chart
Set Point on
Model Pressure Fall
- 0.70 ± .06
- 0.75 ± .07
- 0.75 ± .07
- 0.70 ± .06
- 0.70 ± .06
- 0.75 ± .07
- 0.70 ± .06
- 0.60 ± .06
- 0.70 ± .06
- 0.60 ± .06
- 0.70 ± .06
- 0.80 ± .05
- 0.60 ± .06
- 0.60 ± .06
- 0.60 ± .06
- 0.80 ± .05
5. The Integrated Ignition controls will have 1 to 4 mi-
cro-amps. If the micro-amp reading is less than the
minimum specified, check for high resistance wiring
connections, sensor to burner gap, dirty flame sen-
sor, or poor grounding.
6. If absolutely no reading, check for continuity on all
components and if good - replace ignition control mod-
ule.
NOTE: Contaminated fuel or combustion air can create
a nearly invisible coating on the flame sensor. This coat-
ing works as an insulator causing a loss in the flame
sense signal. If this situation occurs the flame sensor
must be cleaned with steel wool.
Max Make
Pressure On
(PF) W.C. Rise W.C.
- 0.85
- 0.92
- 0.92
- 0.85
- 0.85
- 0.92
- 0.85
- 0.72
- 0.85
- 0.72
- 0.85
- 1.00
- 0.72
- 0.72
- 0.72
- 1.00
Pressure
Switch
Part #
B1370158
B1370179
B1370179
B1370158
B1370158
B1370179
B1370158
B1370142
B1370158
B1370142
B1370158
0130F00042
B1370142
B1370142
B1370142
0130F00042
63