Determine maximum deviation from average voltage:
(AB) 243 ± 239 = 4 v (BC) 239 ± 236 = 3 v (AC) 239 ± 238 = 1 v
Maximum deviation is then 4 v. To determine the percentage of voltage imbalance:
% Voltage Imbalance = 100 x |
| 4 | |
239 | |||
| |||
= 1.7% |
|
| |
This amount of phase imbalance is satisfactory since it is below the allowable maximum of 2%.
IMPORTANT: If supply voltage phase imbalance is more than 2%, contact your local electric utility com- pany immediately.
Condenser operation on improper line voltage or exces- sive phase imbalance may be considered abuse and any re- sulting damage may not be covered by Carrier warranty.
All wiring must be in accordance with local or NEC (National Electrical Code) regulations. Refer to Fig. 11 for combination ®eld wiring.
MAIN POWER WIRING Ð The units must have adequate overcurrent protection, fuses, or HACR (Heating, Air Conditioning and Refrigeration) breakers, according to the national and applicable local codes.
For ®eld power connections, all main power wiring enters the unit through a
CONTROL CIRCUIT POWER WIRING Ð Connect
GENERAL WIRING NOTES
1.Power entry is at one end only.
2.Fan motors are thermally protected. All motors are pro- tected against primary
3.Replacement of factory wires must be with appliance wir- ing material rated 105 C or its equivalent.
4.Factory wiring is in accordance with NEC. Field modi- ®cations or additions must be in compliance with all ap- plicable codes.
| LEGEND |
EQUIP | Ð Equipment |
FMC | Ð Fan Motor Contactor |
GND | Ð Ground |
| Field Wiring |
| Factory Wiring |
| Field Splice |
| Marked Terminal |
Fig. 11 Ð Combination Field Wiring
12
