Service Manual

SERVICING
57
Use LPM-08 (2 stage) propane conversion kit for propane
conversions at altitudes below 2000 feet. Natural gas instal-
lations below 2000 feet do not require a kit.
For propane conversions above 2000 feet, high altitude kit
HA-03 is required in addition to the propane conversion kit.
Natural gas and LP gas installations at altitudes > 2000 ft
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE 45/55 47/55 47/56 - 47/56 48/57 48/58 49/58
CANADA BURNER ORIFICE 45/55 - - 48/57 - - - -
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE 44/55 44/55 45/56 - 45/56 46/57 47/58 47/58
CANADA BURNER ORIFICE 44/55 - - 47/57 - - - -
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE 43/55 53/55 44/56 - 44/56 44/56 45/57 45/57
CANADA BURNER ORIFICE 43/55 - - 46/57 - - - -
ELEVATION ABOVE SEA-LEVEL (FEET)
20,000 BTUH NAT/20,OOO BTUH/L.P.
INPUT/BURNER
INPUT/BURNER
HIGH ALTITUDE
KIT
HA02
HIGH ALTITUDE
KIT
22,500 BTUH NAT/20,OOO BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
25,000 BTUH NAT/20,OOO BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
HIGH ALTITUDE
KIT
HA02
HA02
INPUT/BURNER
S-313 TESTING IGNITION CONTROL MODULE
NOTE: Failure to earth ground the unit, or a high resistance
connection in the ground may cause the control to lockout
due to failure to flame sense.
L2
INDUCER
LOW
HIGH
L1
OD F
LOW
HIGH
T1
Q3
K4
K3 K5
K6
T2
K7
FS
U1
U2
U6
U7
U4
U5
U3
P2
K2
K1
ECON
STAGE
DELAY
C9
SPEED U P
SW1
FAULT
RECALL
BLOWER
OFF
DELAY
F1
RCW1W2G Y2
90
120
150
180
10MIN
5 MIN
NONE
PARK
1
2
3
4
5
Y1
PCBAG127 DSI Control Board
Testing Direct Spark Ignition (DSI) Systems
PCBAG127 Board
Heating Mode
Indoor thermostat calling for heat (15 second prepurge time
and 7 second trial for ignition).
1. Check for 230 volts from L1 terminal of control module to
L2. No voltage - check wire connections, continuity, etc.
2. Check for 24 volts at "R" to "C" thermostat terminals.
a. No voltage - check 3 amp automotive type fuse on
control board. A blown fuse could indicate a short
in the 24 volt circuit (thermostat or limit circuit).
b. Voltage Present - check limit and rollout (S-301
and S-302). If limit and rollout are closed, then
check for 24 VAC at the gas valve terminals.
c. No 24 VAC at gas valve - check 9 pin connector
and wires from ignition control to gas valve. If wires
and connections at 9 pin connector check good,
replace ignition control.
d. Voltage present at gas valve - replace gas valve.