Nordyne Light Commercial Air Handler B5SM -090 - Manual (Page 15)

15
Figure 8. Typical Heat Pump Thermostat Connections
BLOWER
MOTER
GND
BLACK
BLACK
GREEN
BROWN
TO FIELD
SUPPLIED DISCONNECT
SINGLE STAGE
HEAT PUMP THERMOSTAT
OUTDOOR
SECTION
NOTE 1
NOTE 2
FREEZESTAT
TYPICAL HEAT PUMP THERMOSTAT CONNECTION (NO ECONOMIZER)
AIR HANDLER
SECTION
TERMINAL
BOARD
G
C
W2
O
R
Y
W1
C
Y
R
G Y E R O B
L1
L2
L3
O
W2
W2 C
NOTES:
1. Jumper between W2 and E is required.
2. C &W2 to be connected to electric heat.
TYPICAL HEAT PUMP THERMOSTAT CONNECTION (WITH ECONOMIZER)
BLOWER
MOTER
GND
TO FIELD
SUPPLIED DISCONNECT
OUTDOOR
SECTION
FREEZESTAT
AIR HANDLER
SECTION
TERMINAL
BOARD
G
C
W2
O
R
Y
W1
C
Y
R
L1
L2
L3
O
W2
s
C7400A
B
Y1
OPTIONAL
ECONOMIZER
W7459A
C7150
M.A.S.
TB-11 M7415A
T
T1MA
MIN.
POT.
P1
P
TR1
TR
Y2
S
TR 1 TR
o
S
1
3
2
4
T
P
T1
2K
JUMPER
WIRE
5
P1
r
1S
1S
A B
7 9
4 6
1 3
BLU-14”
YEL-18”
GRY-90”
GREEN
GREY
YELLOW
BLACK
ORANGE
RED
RED
WHITE
BLUE
VIO-14”
GRN-18”
GRN-18”
RED-12”
GRY-12”
BLK-12”
BLU-12”
BLK-12”
BLACK
BLACK
GREEN
BROWN
SINGLE STAGE
HEAT PUMP THERMOSTAT
NOTE 1
NOTE 2
NOTE 4
NOTE 5
NOTE 3
G Y E R O B W2 C
NOTES:
1. Jumper between W2 and E is required.
2. C & W2 to be connected to electric heat.
3. Remove BLACK wire from air handler low voltage terminal board
Y terminal and connect to YELLOW wire from economizer.
4. 2nd Stage refrigerant cooling with optional economizer installed. A 2
stage thermostat is required for simultaneous operation of the economizer
and refrigerant system. Connect Y2 from 2 stage thermostat to BLUE
wire from economizer. If installing an economizer in this unit, refer to the
Economizer installation instructions for proper set up and operation.
5. Heat Pump Economizer Relay. Connect B from thermostat to GREY
wire from Economizer. Required for proper operation of an economizer
(optional) in the heat pump Heating mode. If installing an economizer in
this unit, refer to the Economizer installation instructions for proper set
up and operation.