10
ROOM THERMOSTAT
(6 wires)
BHA BLOWER COIL
(5 wires)
RH OUTDOOR UNIT
THERMOSTAT* CONNECTIONS TO RH-HEAT PUMPS
WITH INDOOR BLOWER COIL
ROOM THERMOSTAT (2)
(6 wires)
BHA BLOWER COIL
(5 wires)
RH OUTDOOR UNIT
WARNING
To avoid personal injury, shock or death, disconnect the
electrical power before electrically connecting any
equipment or changing any existing wiring.
A) No Outdoor Thermostat - Electric Heat Supplied During Defrost
Notes: (1) BHA-TB blowers may require additional wire(s) here. See BHA-TB wiring diagram for details.
B) With Outdoor Thermostat - Electric Heat Supplied During Defrost
ATK Not Controlling 1st Group of Electric Heaters - 9.6 to 28.8 KW
Notes: (1) BHA-TB blowers may require additional wire(s) here. See BHA-TB wiring diagram for details.
(2) “Emergency Heat” will stop the compressor, but it will not bypass the outdoor thermostat. Only the amount of
heat controlled by W2 will be energized above the ATK setpoint.
(3) See notes on page 12 regarding connector, GY42 wire, and staging of electric heat.
* Approved Thermostats are:
THSMEC1H2BA
THSMDC1H2BA
THSADC1H2BA
THSMDC1H3BA
THSADC1H3BA
THPMFC1H2BA
Thermostats shown with required connections only.
Thermostats may have other terminals not shown in
diagrams.
R
W2
G
C/X
RHxEH001
R W1 Y W2 E G C/X O
R Y
W2 E
C/X
O
(1)
(1)
R
W2
GY42
G
C/X
RHxEH002
R W1 Y W2 E G C/X O
ATK05
(1)
(1)
(3)
R Y
W2 E
C/X
O
COLOR CODE
1ST GROUP COLOR
2ND GROUP NUMBER
OR-ORANGE
BK-BLACK
YL-YELLOW
BU-BLUE
VT-VIOLET
RD-RED
BR-BROWN
TN-TAN
GN-GREEN
GY-GRAY
