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120 Volt Line Connection of Accessories
Humidifier and Electronic Air Cleaner
HIGH VOLTAGE !
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
,
ELECTRICAL SHOCK
DISCONNECT ELECTRICAL POWER
BEFORE SERVICING OR CHANGING ANY ELECTRICAL
.
WIRING
The furnace integrated control module is equipped with line
voltage accessory terminals for controlling power to an optional
field-supplied humidifier and/or electronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner
Humidifier
Turn OFF power to the furnace before installing any accesso-
ries. Follow the humidifier and/or air cleaner manufacturers'
instructions for locating, mounting, grounding, and controlling
these accessories. Accessory wiring connections are to be
made through the 1/4" quick connect terminals provided on
the furnace integrated control module. The humidifier and
electronic air cleaner hot terminal is identified as HUM and
EAC, the neutral terminal is identified as NEUTRAL. All field
wiring must conform to applicable codes. Connections should
be made as shown in the following illustration.
Room
Thermostat
Y
C
Remote Condensing Unit
(Single-Stage Cooling)
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring must
conform to all local codes, and have a minimum temperature
rating of 105°C. All line voltage wire splices must be made
inside the furnace junction box.
The integrated control module single humidifier terminal
(HUM) is energized with 120 volts whenever the induced
draft blower is energized. This terminal can also be used
to provide 120 volt power to a humidifier transformer. The
remaining primary transformer wire would be connected to the
Line N on the control board. The integrated control module
electronic air cleaner terminals (EAC) are energized with 120
volts whenever the circulator blower is energized.
NOTE: Wiring routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
WARNING
1.0 Amp maximum at 120 VAC
1.0 Amp maximum at 120 VAC
Table 3
R
Furnace Integrated
R
Control Module
Figure 10
Fossil Fuel Applications
This furnace can be used in conjunction with a heat pump in
a fossil fuel application. A fossil fuel application refers to a
combined gas furnace and heat pump installation which uses
an outdoor temperature sensor to determine the most cost
efficient means of heating heat pump or gas furnace.
A heat pump thermostat with two stages of heat is required
to properly use a furnace in conjunction with a heat pump.
Refer to the fossil fuel kit installation instructions for additional
thermostat requirements.
Strictly follow the wiring guidelines in the fossil fuel kit
installation instructions. All furnace connections must be made
to the furnace integrated control module and the FURNACE
terminal strip on the fossil fuel control board.
Gas Supply and Piping
The furnace rating plate includes the approved furnace gas
input rating and gas types. The furnace must be equipped to
operate on the type of gas applied.
T
O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE
INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT
RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES
.
OPERATING
Inlet gas supply pressures must be maintained within the
ranges specified in the following table. The supply pressure
must be constant and available with all other household
gas fired appliances operating. The minimum gas supply
pressure must be maintained to prevent unreliable ignition.
The maximum must not be exceeded to prevent unit overfiring
and damage to gas valve.
NOTE: Do not remove the gas valve inlet plug before the
gas line is installed. Replace if water or debris has been
introduced.
INLET GAS SUPPLY PRESSURE
Natural Gas
Minimum: 4.5" w.c.
At all altitudes, the manifold pressure must be within 0.2 inches
w.c. of that listed in the Specification Sheet applicable to your
model for the fuel used. At all altitudes, the air tempera ture
rise must be within the range listed on the furnace nameplate.
High Altitude Derate
IMPORTANT NOTE: The furnace, as shipped, requires no
change to run between 0-4500 feet. Do not attempt to change
the firing rate by changing orifices or the manifold pressure.
This can cause poor combustion and equipment failure.
At all altitudes, the manifold pressure must be within 0.2
inches w.c. of that listed on the furnace nameplate. At all
altitudes the air temperature rise must be within the range
listed on the the Specification Sheet applicable to your
model for the fuel used.
16
CAUTION
Maximum: 10.0" w.c.
Table 4
,
THE
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