SERVICING
58
8. If not as listed, replace control.
Note:
the pressure switch
must
be mounted with the dia-
phragm in a vertical position.
S-311 HIGH ALTITUDE APPLICATION
High Altitude Derate - U.S. Installations Only
I
MPORTANT NOTE:
The gas/electric units naturally derate
with altitude. Do not attempt to increase the firing rate by
changing orifices or increasing the manifold pressure. This
can cause poor combustion and equipment failure. At all
altitudes, the manifold pressure must be within 0.3 inches
W.C. of that listed on the nameplate for the fuel used. At all
altitudes and with either fuel, the air temperature rise must
be within the range listed on the unit nameplate. Refer to the
Installation Manual provided with the LP kit for conversion
from natural gas to propane gas and for altitude adjustments.
When this package unit is installed at high altitude, the
appropriate High Altitude orifice kit must be installed. As
altitude increases, there is a natural reduction in the density
of both the gas fuel and combustion air. This kit will provide
the proper design certified input rate within the specified
altitude range. High altitude kits are not approved for use in
Canada. For installations above 2,000 feet, use kit HA-02.
The HA-02 kit is used for both Natural and LP gas at high
altitudes.
Use LPM-05 (2 stage heat models) or LPT-03 (1 stage heat
models) propane conversion kit for propane conversions at
altitudes below 2000 feet. Natural gas installations below
2000 feet do not require a kit.
(LPT-00A may be used on models with AA revisions. LPT-
03 is compatible with both the White Rodgers and the
Honeywell gas valves.)
For propane conversions above 2000 feet, high altitude kit
HA-02 is required in addtion 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 UP
SW1
FA ULT
RECALL
BLOWER
OFF
DELAY
F1
R C W1W2 G
Y2
90
120
150
180
10 MIN
5 MIN
NONE
PARK
1
2
3
4
5
Y1
PCBAG100 DSI Control Board
Testing Direct Spark Ignition (DSI) Systems
PCBAG100 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.
