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To install/connect a dehumidistat:
1. Turn OFF power to furnace.
2. Secure the dehumidistat neutral wire (typically the white
lead) to the terminal marked "DEHUM" on the furnace
integrated control module.
3. Secure the dehumidistat hot wire (typically the black
lead) to the terminal marked "R" on the furnace
integrated control module.
4. Secure the dehumidistat ground wire (typically the green
lead) to the ground screw on the furnace junction box.
NOTE: Ground wire may not be present on all
dehumidistats.
5. If the condenser is a straight cooling unit, install a
jumper from Y1 to 0 on the furnace board.
6. Turn ON power to furnace.
To enable the dehumidify function on the integrated control mod-
ule, set the dehumidification ENABLE DIP switch from OFF to
ON.
Once the switch is set, the dehumidify function is enabled during
a combination call for cooling (T-Stat) and dehumidification
(DEHUM-Stat). Refer to the DIP switch chart in the back sec-
tion of this manual.
F
F
A
OSSIL
UEL
PPLICATIONS
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).
Strictly follow the wiring guidelines in the fossil fuel kit in-
stallation instructions. All furnace connections must be made
to the furnace control board and the "FURNACE" terminal strip
on the fossil fuel control board.
L
V
A
INE
OLTAGE
CCESSORIES
H
)
UMIDIFIER
The furnace control board is equipped with line voltage ac-
cessory terminals for controlling power to an 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 accessory load specifications are as follows. (The fur-
nace control board also has a set of dry contacts for hu-
midifier connection.)
Humidifier
Electronic Air Cleaner
(E
A
C
LECTRONIC
IR
LEANER AND
WARNING
1.0 Amp maximum at 120 VAC
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accessories.
Follow the humidifier or air cleaner manufacturers' instructions
for locating, mounting, grounding, and controlling these acces-
sories. Accessory wiring connections are to be made through the
1/4" quick connect terminals provided on the furnace integrated
control module. The Electronic air cleaner hot terminal is
identified as EAC. It is necessary to remove the protective
tab on the board cover to access the EAC Terminal. The EAC
neutral terminal is identified as NEUTRAL. A line voltage
humidifier may be connected between one of the HUM con-
tacts and NEUTRAL. The other HUM contact must be fed
from the L1 terminal.
All field wiring must conform to applicable codes. Connections
should be made as shown in Figure 35.
NEUTRAL
L1
Accessories Wiring
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 furnace control board HUM (dry contacts) are closed when-
ever the inducer is energized in a non-communicating in-
stallation. When used with a CTK02**, CTK03 or CTK04 com-
municating thermostat, the HUM terminals are closed when-
ever there is a call for humidity when this feature is enabled
in the communicating thermostat. In the CTK03AB & CTK04**
humidity must be enabled in he main menu, se up in the
Installer menu & ComfortNet user menu. The integrated con-
trol module electronic air cleaner terminals (EAC) are energized
with 115 volts whenever the circulator blower is energized.
24 V
H
OLT
UMIDIFIER
A 24 volt humidifier can be powered by feeding one of the
HUM terminals with a field installed wire from the R ter-
minal.
G
S
P
AS
UPPL Y AND
IPING
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. This includes any conversion kits
required for alternate fuels and/or high altitude.
AUX OUT
AUX IN
Figure 35
31
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