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WARNING
MBR
SYSTEM COMPOSITE DIAGRAM
800-2000
10 KW & BELOW
HEAT PUMP
O
C
W2
Y
BL
#18 GA. 5 WIRE
OUTDOOR THERMOSTAT
(OPTIONAL) MAKE ON FALL
MBR
SYSTEM COMPOSITE DIAGRAM
1200-2000
ABOVE 10 KW
HEAT PUMP
C W2 O
O
B
W
Y
R
L
H
E
U
A
I
L
E
T
N
L
E
G
O
E
W
BL
SEE NOTE 1
NOTES
1) OUTDOOR THERMOSTAT (OT-1) SHOULD BE THE
FIRST TO CLOSE AND THE FIRST TO OPEN.
2) IF OUTDOOR THERMOSTAT IS NOT USED. TIE WHITE
AND BROWN WIRES FROM AIR HANDLER TOGETHER.
3) REMOVE WIRE WHEN USING OUTDOOR T-STAT.
#18 GA. 7 WIRE NEEDED WHEN (2) OTs ARE USED
Wiring is subject to change, always refer to the wiring diagram on the unit for the most up-to-date wiring.
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING.
MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
CONVENTIONAL
ROOM THERMOSTAT
R
O
C W2 G
Y
R
Y
O
W
#18 GA. 6 WIRE NEEDED WHEN OT IS USED
CONVENTIONAL
ROOM THERMOSTAT
Y
R
Y
O
C W2 G
R
E
D
R
Y
O
W
OT-1
#18 GA. 5 WIRE
OT-2
#18 GA. 7 WIRE NEEDED WHEN (2) OTs ARE USED
NOMENCLATURE
OT - OUTDOOR THERMOSTAT (OPTIONAL)
MOF - MAKE ON FALL
EHR - EMERGENCY HEAT RELAY (OPTIONAL)
#18 GA. 7 WIRE
R
E
MBR UNIT
RED
R
BR
G
GREEN
SEE
NOTE 3
W
WHITE
BL
BLUE
#18 GA. 7 WIRE
R
E
RED
R
G
GREEN
SEE
SEE
NOTE 3
NOTE 2
W
WHITE
1
2
EHR
BROWN
4
3
BL
BLUE
8
FIGURE 9
FIGURE 10
MBR UNIT
COLOR CODES
R - RED
O - ORANGE
Y - YELLOW
W - WHITE
BL - BLUE
PK - PINK
V - VIOLET
G - GREEN
BR - BROWN
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