Electrical Connections - McQuay M5WM Series Installation And Maintenance Manual

Electrical Connections

WARNING
!
Improper installation can cause severe personal
injury or death. Wiring must be done by a qualified
electrician in compliance with local codes. Model
10F, 10FR, 15F and 15FR are using two separate
power supply.
115V/1Ph/60Hz. Outdoor unit powered by 208-
230V/1Ph/60Hz.
• Wiring must be in accordance with all applicable
electrical codes.
• Wires must not
compressor or any moving part.
• All electrical field wiring must be clamped at both the
indoor unit and the outdoor unit. See Figure 14 for
typical clamp.
• See Table 4, figure 13 and Figure 15 for the number
of wires, wire gauge and fuse/circuit breaker size
required.
Table 4: Wire and Fuse/Breaker Requirements
Unit Size
Voltage-1Ph/60Hz
Power supply wire size
Number of wires
Connecting wire size
Number of wires – A/C
Number of wires - HP
Fuse/Breaker size
* Not including the Outdoor Coil Sensor Cable.
Figure 13. Cooling Only Size 10 & 15
Indoor Unit
Terminal Block Connecting Wires
COMP
N2
N1
L
N
L1
NEC requires an approved
electrical disconnect within sight
of the unit so that anyone
working on the unit can turn the
!
power off and see that its not
accidentally turned back on. This
will require two disconnects, one
by the outdoor unit and one by
the indoor unit.
IM-5WMF(SEER13)-0706
Indoor unit powered
touch the refrigerant
10/15
Indoor Outdoor
115V 208/230V
14 ga. 14 ga.
2 + gnd. 2 + gnd.
14 ga.
2
4
15 amp 15 amp
Outdoor Unit
Terminal Block
COMP
N2
N1
Power L2
supply
208/230V
L1
Power
supply
115V
Figure 14. Terminal Block and wire Clamp
by
piping,
Figure 15. Heat Pump Unit Size 10 & 15
Outdoor coil sensor, 2 conductor cable, (26 feet long)
20/25
shipped with the indoor unit. Extend with 22 ga. low voltage
wire if not long enough to reach outdoor unit.
208/230V
Indoor Unit
12ga.
Terminal Block
2 + gnd.
14 ga.
3 + gnd. 4WV
5 + gnd.
OF
20 amp
Comp
N2
N1
L
L
Connecting Wires
Power L2
supply
208/230V
L1
N Power
supply
L1
115V
NEC requires an approved
electrical disconnect within
!
sight of the unit so that
anyone working on the unit
can turn the power off and
see that its not accidentally
turned back on. This will
require two disconnects, one
by the outdoor unit and one
by the indoor unit
Outdoor Unit
Terminal Block
4WV
OF
Comp
N2
N1
L
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