27
1. Humidification Options are ON / OFF with the CTK03.
When “On” is selected, the humidification relay on the
furnace control board will function during a heat call if a
humidity demand exists. Selecting “Off” means the hu-
midification relay will not function.
2. If the CTK03 and CTK04 are set up so the compressor off
delay is 0 min, it will display a cool / heat call immedi-
ately regardless of the delay built into the outdoor unit
control board. This means the CTK03AA could show COOL
ON when the outdoor unit is still in a delay period. The
recommendation is to set up the compressor delay to at
least 3 minutes
3. Dual Fuel – When the CTK03 and CTK04 call for gas heat,
the heat pump will shut off, after a delay of approxi-
mately 3 minutes it will then turn on gas heat.
4. Dehumidification (lowering of CFM to 85%) only happens
during low stage cooling operation. The dehumidifica-
tion feature is not active during high stage cool. The
CTK03 and CTK04 can be set up to overcool the home in
order to reach the RH set point.
NOTE: In non-communicating installations with a condens-
ing unit, DIP switch #14 must be checked and set to match a
single or two stage condensing unit. Factory setting is OFF
(single stage).
24 V
OLT
D
EHUMIDISTAT
W
IRING
The optional usage of a dehumidistat allows the furnace’s circu-
lator blower to operate at a slightly lower speed (85% of desired
speed) during a combined thermostat call for cooling and dehu-
midistat call for dehumidification. This can be done through an
independent dehumidistat or through a thermostat’s DEHUM
terminal (if available). This lower blower speed enhances dehu-
midification of the conditioned air as it passes through the AC
coil. For proper function, a dehumidistat applied to this furnace
must operate on 24 VAC and utilize a switch which
opens on
humidity rise.
Refer to the “Thermostat Wiring Diagrams”
figure for additional wiring details.
To install/connect a dehumidistat:
1. Turn OFF power to furnace.
2. Secure one dehumidistat lead to the terminal marked
“DEHUM” on the furnace integrated control module.
3. Secure the other dehumidistat 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. 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 dur-
ing 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
OSSIL
F
UEL
A
PPLICATIONS
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a com-
bined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost effi-
cient means of heating (heat pump or gas furnace).
A heat pump thermostat with
three stages of heat
is required
to properly use a two-stage 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 installa-
tion instructions. All furnace connections must be made to the
furnace two-stage integrated control module and the “FURNACE”
terminal strip on the fossil fuel control board.
115 V
OLT
L
INE
C
ONNECTION
OF
A
CCESSORIES
(H
UMIDIFIER
AND
E
LECTRONIC
A
IR
C
LEANER
)
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
The furnace integrated control module is equipped with line
voltage accessory terminals for controlling power to an elec-
tronic air cleaner.
The accessory load specifications are as follows. (The furnace
control board also has a set of dry contacts for humidifier
connection.)
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accesso-
ries. Follow the humidifier or air cleaner manufacturers’ in-
structions 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 fur-
nace 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 NEU-
TRAL. A line voltage humidifier may be connected between
one of the HUM contacts and NEUTRAL. The other HUM con-
tact must be fed from the L1 terminal.
OPERATION
