9
Table 5 — Refrigerant Amount to be Added
Step 5 — Complete Electrical Connections —
See Fig. 10 for typical wiring diagram.
POWER SUPPLY — Electrical characteristics of the avail-
able power supply must agree with the unit nameplate rating.
Circuit breaker size and supply voltage must be as shown in
Table 6.
Table 6 — Field Wiring Sizes
*Based on capacity.
POWER WIRING
Installation of wiring must conform with local codes and
with NEC ANSI/NFPA 70, current editions. Units must be
electrically grounded in conformance with the code. In Cana-
da, wiring must comply with CSA C22.1, Electrical Code.
General Wiring Notes
• Separate power sources are required for indoor and out-
door units. See Fig. 11.
• The control circuit does NOT require a separate power
source. See Fig. 12.
• Power entry is on the right side of the unit when facing
the fan grille or front of the unit.
• Terminals for field power supply are suitable for copper
conductors.
Main Power — Bring wires from the disconnect switch
through the knockout hole at the bottom right corner of the unit
to the control box.
CONTROL CONNECTIONS — Control power comes from
the control board in the outdoor unit and does NOT require a
separate source.
Use of 3-core polarized and shielded wire is required.
Shield is used to protect the signal from interference. The con-
trol wire between outdoor and indoor units is bus type. See
Fig. 13.
LIQUID SIDE PIPING DIAMETER (in.)
REFRIGERANT TO BE ADDED PER METER PIPING (lb)
Ø
1
/
4
0.051
Ø
3
/
8
0.132
Ø
1
/
2
0.265
Ø
5
/
8
0.397
Ø
3
/
4
0.595
Ø
7
/
8
0.838
NOTE: Calculate the added refrigerant according to the diameter and the length of the liquid side pipe of the outdoor unit/indoor unit connection.
When the outdoor unit connects 1 indoor unit:
WARNING
Electrical shock can cause personal injury and death. Dis-
connect power supply before making wiring connections.
There may be more than one disconnect switch. Tag all dis-
connect locations to alert others not to restore power until
work is completed.
WARNING
All units must be wired strictly in accordance with the wir-
ing diagram furnished with the unit. Any wiring different
from the wiring diagram could result in personal injury and
property damage.
CAUTION
Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature rat-
ing of at least 105 C.
Ensure supply voltage to the unit, as indicated on the serial
plate, is not more than 10% over the rated voltage or 10%
under the rated voltage.
Failure to follow these recommendations may result in
equipment damage.
CAUTION
Operating unit on improper supply voltage or with exces-
sive phase imbalance may result in equipment damage and
can affect the manufacturer’s warranty.
UNIT
POWER SUPPLY
(V-Ph-Hz)
CIRCUIT
BREAKER (A)
OUTDOOR
208/230-1-60
40/50*
INDOOR
15
