Carrier Omnizone 50XCW06 Installation Start-Up And Operatig Instructions page 19

Determine percent of voltage imbalance:
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
Unit operation on improper line voltage or excessive phase imbal-
ance may be considered abuse and any resulting damage may not
be covered by Carrier warranty.
All wiring must be in accordance with local or NEC (National
Electrical Code) regulations.
POWER WIRING
The units must have adequate overcurrent protection, fuses, or
HACR (Heating, Air-Conditioning and Refrigeration) breakers,
according to the national and applicable local codes.
UNIT
V-PH-Hz
50XCW
208/230-3-60
06 460-3-60
575-3-60
208/230-3-60
08 460-3-60
575-3-60
208/230-3-60
12 460-3-60
575-3-60
208/230-3-60
14 460-3-60
575-3-60
208/230-3-60
16 460-3-60
575-3-60
208/230-3-60
24 460-3-60
575-3-60
LEGEND
LRA — Locked Rotor Amps
NEC — National Electrical Code
RLA — Rated Load Amps
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (NEC Articles 430 and 440), the overcurrent
protective device for the unit shall be fuse or HACR circuit breaker.
Canadian units may be fuse or circuit breaker.
2. Wire sizing amps are a sum of 125% of the compressor RLA plus
100% of indoor fan motor FLA (full load amps).
3. Motors are protected against primary single phasing condition.
4. Indoor-fan motors are 3-phase motors of same voltage as unit.
7
457
Table 2 — Electrical Data
VOLTAGE
RANGE
Min
187
414
518
187
414
518
187
414
518
187
414
518
187
414
518
187
414
518
For field power connections, all main power wiring enters the unit
through a factory-punched access hole under the control box. At-
tach power wires to the power connections on the main power ter-
minal block in the unit control box. Be sure to install a ground
wire.
CONTROL WIRING
All units require an accessory thermostat package to complete the
unit control system. For a room-mounted thermostat, the thermo-
stat may be mounted in an appropriate location in the conditioned
space. Route the wires from the thermostat to the low voltage con-
nection of the control box. Connect wires to the low voltage termi-
nal block. See Fig. 18. The fan switch on the thermostat will con-
trol fan operations.
FREEZE PROTECTION THERMOSTAT
A standard freeze protection thermostat is factory-installed.
COMPRESSOR
NO. 1
Max RLA
253 18.3
506 8.8
632 6.6
253 23.0
506 11.0
632 8.0
253 15.6
506 7.8
632 5.8
253 19.6
506 8.2
632 6.6
253 28.7
506 13.3
632 10.0
253 40.7
506 19.3
632 15.6
19
COMPRESSOR
NO. 2
LRA RLA
136 —
66 —
55 —
149 —
75 —
54 —
110 15.9
52 7.1
39 5.1
136 19.2
66 8.7
55 6.9
191 23.0
100 11.0
78 8.0
240 28.7
140 13.3
107 10.0
LRA
—
—
—
—
—
—
110
52
39
136
66
55
149
75
54
191
100
78