Installation Guide
69-2198—01 4
The DS/BK terminal is used with a variable-speed fan.
Connect the DS, BK, ODD, or DHUM terminal on the
HVAC equipment to this terminal. When 1 zone is calling
(or 25% on systems with more than 4 zones) this termi-
nal will be de-energized of 24 VAC. This reduces blower
speed on most variable speed blowers.
Connect DATS as shown.
5
Connect equipment as shown.
7
C7735A1000 M24804
DATS
DATS
SENSOR
9Connect transformer as shown.
DEDICATED
TRANSFORMER
R
C
M24806
R
C
POWER
L1
(HOT)
L2
RH
RC
W1/E
W2
W3
Y1
Y2
G
O
B
DS/BK
M24809
HVAC
FAN RELAY
24 VOLT TRANS.
G
Y
Y2
CR
W
COMPRESSOR
RELAY
W2
EQUIPMENT

WiriNg

Fig. 7
Fig. 9
Fig. 11
8If using any wireless devic e, connect
the ABCD terminals for th e wireless
interface module.
M28193
A
B
C
D
WIRELESS
ADAPTER
WIRELESS
CONNECT
POWER
THM4000R
CONNECTED
WIRELESS SETUP
Fig. 10
Connect outdoor air temper ature sensor
as shown. Required for dua l fuel systems;
optional for other multistag e systems.
6
Fig. 8
M28207
OT
OT
SENSORS
C7089U1006
OUTDOOR
TEMPERATURE
SENSOR