Carrier DIRECT VENT 4 58HDV Installation Instructions Manual page 49

Thermostat Wiring Guide
These diagrams are for reference. See thermostat
1.
wiring instructions
assignments, connections or operation.
Humidifier/humidistat is optional and not included
2.
with the furnace.
Dehumidify feature requires
3.
DEHUM feature or a separate dehumidistat to get
the dehumidification operation. Dehumidistat is
optional and not included with the furnace.
Underlined terminal indicates intended use for
4.
multiple function terminals.
TSIB terminals only available on 58HDV/359BAV
5.
models.
Two- - stage Air Conditioning or two- - stage Heat
6.
Pump compatible.
W2 furnace operation is from furnace control
7.
algorithm SW1 DIP switch #3 (TT) set to OFF.
Furnace runs in Low Heat for 12 minutes then
switches to High Heat if heating call still exists.
Fig. 56 - - HUM and DEHUM Terminal available from Thermostat. Humidifier Wiring Models and Dehumidify Wiring
for specific terminal
thermostat with
TSIB
NO CONNECTION
Y1
O
NO CONNECTION
NOTE 11
TWO-STAGE or VS
FURNACE
CONTROL
SINGLE-STAGE
THERMOSTAT
W2
NOTE 7
W W1
Y Y/Y2
G
G
R R
NOTE 3, 9, 10
DEHUM
DEHUM
C C
OM
24V HUM
HUM
24V HUM terminal on furnace control is used to
8.
power a humidifier (on call for heat and pressure
switch closed) if no HUM thermostat option is
available.
DEHUM provides a 20% reduction in airflow (when
9.
Y1 or Y1 + Y2 is energized) when the furnace
control DEHUM terminal is energized with 24V.
If no DEHUM thermostat option is available, a
10.
dehumidistat that has closed contacts on a call for
dehumidify may be used
O provides a 10% reduction in airflow when Y1 or
11.
Y1 + Y2 is energized and O is NOT energized. (J2
jumper on TSIB must be in HP COMFORT position
to get this function. AC/HP EFFICIENCY position
results in no reduction of airflow for Y1 or Y1 + Y2
calls regardless of O being energized or not.)
For Heat Pump/Furnace systems, refer to Fossil Fuel
12.
Kit or Dual Fuel Thermostat Installation Instructions
for wiring.
NOTE 5
SINGLE-STAGE
AIR CONDITIONER
Y
C
OPTIONAL
HUMIDIFIER
24V in
COM
NOTE 2
49
A07787