17
NOTE:
Thermostat “R” required if outdoor unit is equipped with
a Comfort Alert™ module or if the outdoor unit is a part of the
ComfortNet™ family of equipment AND is wired as a non-
communicating system.
R
Y
C
NEU
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
R
NOTE:
To apply a single-stage Heating Thermostat, the thermostat
selector switch on the Integrated Control Module
must
be set on
single-stage.
Thermostat - Single -Stage Heating with Single-Stage Cooling
_______________________
R
Y
C
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
NEU
R
Thermostat - Two-Stage Heating with Single-Stage Cooling
_______________________
W1
W2
Y2
Furnace Integrated
Control Module
Remote
Condensing Unit
(Two-Stage Cooling)
Dehumidistat
[Optional]
Y2
NEU
W1
W2
Y2
Thermostat - Two-Stage Heating with Two-Stage Cooling
Thermostat Wiring Diagrams
S
INGLE
-S
TAGE
H
EATING
T
HERMOSTAT
A
PPLICATION
A single-stage thermostat with only one heating stage may
be used to control this furnace. The application of a single-
stage thermostat offers a
timed
transition from low to high
fire. The furnace will run on low stage for a fixed period of
time before stepping up to high stage to satisfy the
thermostat’s call for heat. The delay period prior to step-
ping up can be set at either a fixed 5 minute time delay or a
load based variable time between 1 and 12 minutes (AUTO
mode). If the AUTO mode is selected, the control averages
the cycle times of the previous three cycles and uses the
average to determine the time to transition from low stage to
high stage.
To use a single-stage thermostat, turn off power to the fur-
nace, move the thermostat selection DIP switch to the OFF
position. Set the desired transition time by setting the tran-
sition delay DIP switch to the desired ON/OFF position.
Turn power back on. Refer to the following figure.
3
4
Thermostat
Stage Delay
Move to the ON position
to select two-stage
thermostat or OFF to
select single stage
thermostat
Move to the ON position
to select Auto transition
delay or OFF for 5 minute
transition delay
Heat OFF Delay
DIP Switches
ON
OFF
S1
24 V
OLT
D
EHUMIDISTAT
W
IRING
The optional usage of a dehumidistat allows the furnace’s
circulator blower to operate at a slightly lower speed (85%
of desired speed) during a combined thermostat call for cool-
ing and dehumidistat 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 dehumidification of the conditioned air as
it passes through the AC coil. For proper function, a dehu-
midistat 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 wir-
ing details.
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.
Содержание DVC80603B
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