Bulletin 30-20 — Page 15
© Copyright 2010, Unico, Inc.
GRD. LEAD TO
MOTOR BASE
TO FUSED 230V DISCONNECT
NOT OVER 15 AMP FUSE
TYPICAL
OUTDOOR
SECTION
TYPICAL
THERMOSTAT
U
NICO
S
YSTEM
®
SERIES M
FOR COOLING ONLY INSTALLATIONS,
OMIT ITEMS MARKED ✳
230V
208V
24V
COMMON
1
2
3
4
5
6
34
56
7
1
2
1
2
3
4
5
6
1
2
3
4
5
6
BK
BK
RED
BRN
BK
BRN
Variable Speed
Motor Controller
YEL
YEL
BLU
UNLATCHING RELAY
LO RELAY
YEL
L1
L2
RED
BLU
HI RELAY
BLU
BLU
*
Common
X
Power
R
*
Rev. Valve
(Heating)
B
*
Rev. Valve
(Cooling)
O
Compressor
Y
*
Heating
W
Fan
G
Common
C
Compressor
Y
Power
*
R
Rev. Valve
*
O
Defrost Heat
*
W
ANTI-FROST
CONTROL
(SEE NOTE 4)
BK
YEL
EQUIPMENT GROUND
TRANSFORMER
ANTI-FROST
CONTROL
BYPASS RELAY
(HEAT PUMPS ONLY)
(SEE NOTE 3)
2
1
4
3
BRN
BRN
RED
OR
FACTORY
FIELD (NEC) CLASS 1
FIELD (NEC) CLASS 2
WIRING LEGEND
WARNING!
BE SURE TO INSULATE THE UNUSED TRANS-
FORMER LEAD TO PREVENT INJURY OR
DEATH FROM ELECTRICAL SHOCK.
A00816.CNV
NOTES
1. IF REVERSING VALVE IS ENERGIZED ON HEATING, CONNECT TERMINAL NO. 4 TO B
INSTEAD OF O.
2. IF MEASURED SUPPLY VOLTAGE IS 208V OR LESS REMOVE ORANGE TRANSFORMER
LEAD AT THE TERMINAL AND INSULATE WITH TAPE. REMOVE TAPE FROM RED
(UNCONNECTED) TRANSFORMER LEAD AND SECURE TO TERMINAL. INSULATE THE LEAD
ON THE ORANGE WIRE.
3. ANTI-FROST CONTROL BYPASS RELAY IS SHIPPED WITH HEAT PUMP COOLING MODULE
(MODEL MC2430H, MC3642H, AND MC4860H). FIELD INSTALL RELAY AS SHOWN WHEN
USED WITH THESE MODULES.
4. ANTI-FROST CONTROL IS USED ONLY WITH REFRIGERANT COOLING MODULES (MODELS
MC2430C,H, MC3642C,H AND MC4860C,H). FIELD ATTACH LEADS TO TERMINALS AS
SHOWN.
YEL
BLU
RED
RED
BLU
Figure 20. M Series Electrical Wiring Diagram (with Motor Controller installed) for A00175-G02 Control Box
To Next Page
Loading...
Need help?
General
