Daikin DRG0361DL00001S, Инструкция по эксплуатации

Страница: 72 / 113

72
SERVICING
Pressure Switch Operation (DSI Direct Spark System)
The pressure switch is ignored unless there is a call for
heat. When the control receives a call for heat, the control
checks to see that the pressure switch is open. If the
control sees that the pressure switch is closed before the
induced draft blower is energized, the LED will flash a code
of “2” (to indicate the pressure switch is stuck closed) and
the inducer will remain off until the pressure switch opens.
If the pressure switch opens before the ignition period, the
induced draft blower will remain on and the control will
stay in pre-purge until the pressure switch is closed for an
entire 15 second pre-purge period. The LED will flash a
code of “3” to indicate open pressure switch.
If the pressure switch opens after the gas valve has been
energized, the control will de-energize the gas valve and
run the indoor blower through the heat off delay. The
inducer stays on until the pressure switch re-closes. Then
the control makes another ignition attempt.
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do so
may cause property damage, personal injury
or death.
1. Remove wires from the electrical terminals.
2. Using a VOM check from Common to NO (Normally
Open) - should read open.
If switch reads as noted proceed to Step 3, otherwise
replace control.
3. Remove the pressure control hose from the control
and interconnect with an inclined manometer as
shown:
PRESSURE SWITCH
INCLINED
MANOMETER
1/4" COPPER TEE
HOSE
TO J-TUBE
Reconnect wires to the Common and NO terminals.
With Power ON:
WARNING
Line Voltage now present.
4. Energize furnace for heating cycle. The induced
draft blower motor will begin to run. The inclined
manometer should read approximately -1.2” ± 0.3”
W.C with no combustion.
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
IMPORTANT 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 HAKT036150. The HAKT036150 kit is used for
both Natural and LP gas at high altitudes.
For propane conversions at altitudes below 2,000 feet, use
LPHE-036072 propane conversion kit.