High Altitude Application; Testing Ignition Control Module - Daikin DCG Series Service Instructions Manual

SERVICING
5. Remove and check the two electrical wires and using the
VOM check from Common to NO (Normally Open), it
should read closed (with I.D. motor running). If not as
above, replace pressure control.
6. Reconnect all wires to the control and place in heating
cycle.
7. As the unit fires on high stage, the inclined manometer
negative pressure will drop to -0.9" ± 0.3" W.C.
8. If not as listed, replace control.
Note: the pressure switch must be mounted with the
diaphragm in a vertical position.
S-311 HIGH ALTITUDE APPLICATION
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 may 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
HAKT36300. The HAKT36300 kit is used for both Natural and
LP gas at high altitudes.
For propane conversion above 2000 feet, high altitude kit
HAKT36300 is required in addition to propane conversion
kit LPKT36150.
HIGH ALTITUDE
INPUT/BURNER
KIT
U.S. BURNER ORIFICE
HA-02
CANADA BURNER ORIFICE
HIGH ALTITUDE
INPUT/BURNER
KIT
U.S. BURNER ORIFICE
HA-02
CANADA BURNER ORIFICE
HIGH ALTITUDE
INPUT/BURNER
KIT
U.S. BURNER ORIFICE
HA-02
CANADA BURNER ORIFICE
20,000 BTUH NAT/20,000 BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
2000 3000 4000 4500 5000 6000 7000
45/55 47/55 47/56 - 47/56 48/57 48/58 49/58
45/55 - - 48/57 - - -
22,500 BTUH NAT/20,000 BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
2000 3000 4000 4500 5000 6000 7000
44/55 44/55 45/56 - 45/56 46/57 47/58 47/58
44/55 - - 47/57 - - -
25,000 BTUH NAT/20,000 BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
2000 3000 4000 4500 5000 6000 7000
43/55 43/55 44/56 - 44/56 44/56 45/57 45/57
43/55 - - 46/57 - - -
S-313 TESTING IGNITION CONTROL MOD-
ULE
NOTE: Failure to earth ground the unit, reversing the neutral
and hot wire connection to the line (polarity), or a high
resistance connection in the ground or neutral lines may
cause the control to lockout due to failure to detect flame.
The ground wire must run from the unit all the way back to
the electrical panel. Proper grounding can be confirmed by
disconnecting the electrical power and measuring resis-
tance between the neutral (white) connection and the burner
closest to the flame sensor. Resistance should be less than
10 ohms.
DSI Direct Spark Ignition Systems
NORMAL SEQUENCE OF OPERATION (DSI Direct Spark
Ignition System)
1. Thermostat calls for heat by energizing "W". The control
checks the pressure switch for open condition. If the
pressure switch is closed the control will flash code "3"
and wait for the pressure switch to open.
2. The induced draft motor is energized and the control
flashes code "2" and waits for the pressure switch to
close. Once the pressure switch is closed, the LED
stops flashing and the control begins timing the 15
second pre-purge.
L2 L2 L2 L2
L1
COOL HEAT UNUSED
8000
-
8000
-
8000
-
3. The control energizes the spark igniter and gas valve for
7 seconds. If flame is established, the control goes into
a 30 second heat on delay.
4. The indoor blower is energized at the heat speed after a
30 second on delay.
Blower Off Delay Settings
1
3 2
5 4
6
8
9 7
FS
L1 D1
12 11 10
Transformer
DSI Control Board
speed up
69