Service Manual

SERVICING
57
20 00 30 00 4 000 4 500 500 0 600 0 7000 8 000
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 -- -- -- --
20 00 30 00 4 00 0 4500 500 0 600 0 7 0 00 8 000
U. S. BURNER ORIFICE 43/ 55 43/ 55 44/ 56 -- 44/ 56 44/ 56 45/ 57 45/ 57
CANADA BURNER ORIFICE 43/ 55 -- -- 46/ 57 -- -- -- --
20 00 30 00 4 00 0 4500 500 0 600 0 7 0 00 8 000
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 -- -- -- --
INPUT/ BURNER
20, 000 BTUH NAT/ 20,000 BTUH/ L. P.
ELEVATION ABOVE SEA- LEVEL (FEET)
INPUT/ BURNER
22, 500 BTUH NAT/ 20,000 BTUH/ L. P.
ELEVATION ABOVE SEA- LEVEL (FEET)
INPUT/ BURNER
25, 000 BTUH NAT/ 20,000 BTUH/ L. P.
ELEVATION ABOVE SEA- LEVEL (FEET)
High
Alt it ude
Kit 20 00 3000 4000 4500 5 00 0 6 00 0 700 0 8000
U. S. BURNER ORIFICE 46/ 1.25MM 46/ 1.25MM 47/ 56 -- 48/ 56 48/ 57 49/ 57 49/ 57
CANADA BURNER O RIFICE -- -- 48/ 56 -- -- -- --
INPUT/ BURNER
20,000 BTUH NAT/18,000 BTUH/ L.P.
ELEVATION ABO VE SEA-LEVEL (FEET)
HA-03
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
INDUCE R
LOW
HIGH
L1
ODF
LO W
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 UP
SW1
FAULT
RECALL
BLOWER
OFF
DELAY
F1
R C W1W2 G Y2
90
120
150
180
10MIN
5 MI N
NONE
PARK
1
2
3
4
5
Y1
PCBAG127 DSI Control Board
Testing Direct Spark Ignition (DSI) Systems
PGBAG127 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.