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WIRING DIAGRAMS
SYSTEM COMPOSITE DIAGRAM
C
B
L
U
E
SYSTEM COMPOSITE DIAGRAM
MBR1200-2000
ABOVE 10kW
HEAT PUMP
C
B
L
U
E
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.
10
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
MBR0800
10kW & BELOW
HEAT PUMP
O
Y
R
W2
R
Y
O
E
E
W
R
D
L
H
A
R
L
I
N
O
T
G
Y
W
E
E
O
W
BL
OT - 1
#18 GA. 5 WIRES
#18 GA. 6 WIRE NEEDED WHEN OT IS USED
O
Y R
W 2
Y
R
O
E
E
W
R
L
D
H
A
L
I
N
O
T
G
W
Y
E
E
O
W
BL
OT-1
#18 GA. 5 WIRES
OT-2
ROOM THERMOSTAT
Y
O
C
G
R
E
W2
BR
G
SEE NOTE 3
W
BL
OUTDOOR THERMOSTATS
(OPTIONAL) MAKE ON FALL
ROOM THERMOSTAT
G
R E
Y
O
C
W 2
BR
G
SEE
NOTE 3
W
1
EHR
3
BL
#18 GA. 7 WIRE NEEDED WHEN (2) OTs ARE USED.
NOMENCLATURE
OT
- OUTDOOR TEMPERATURE (OPTIONAL)
MOF - MAKE ON FALL
EHR - EMERGENCY HEAT RELAY (OPTIONAL)
MBR UNIT
RED
R
GREEN
WHITE
BLUE
#18 GA. 7 WIRES
MBR UNIT
RED
R
GREEN
SEE
WHITE
NOTE 2
BROWN
1
BLUE
4
COLOR CODES
R
- RED
O
- ORANGE
Y
- YELLOW
W
- WHITE
BL - BLUE
G
- GREEN
V
- VIOLET
BR - BROWN
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