Convenience Outlets - Carrier WeatherExpert 50LC14 Installation Instructions Manual

Single package rooftop cooling only with puron(r-410a) refrigerant

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Voltage to compressor terminals during operation must be within

voltage range indicated on unit nameplate. On 3-phase units, volt-

ages between phases must be balanced within 2% and the current

within 10%. Use the formula shown in the example below to de-

termine the percent of voltage imbalance. Operation on improper

line voltage or excessive phase imbalance constitutes abuse and

may cause damage to electrical components. Such operation

would invalidate any applicable Carrier warranty.

Example: Supply voltage is 230-3-60

max voltage deviation from average voltage

% Voltage

= 100 x

Imbalance

Example: Supply voltage is 230-3-60

AB = 224 v

BC = 231 v

AC = 226 v

MOTOR

(224 + 231 + 226)

Average Voltage =

Determine maximum deviation from average voltage.

(AB) 227-224 = 3 v

(BC) 231-227 = 4 v

(AC) 227-226 = 1 v

Maximum deviation is 4 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100x

This amount of phase imbalance is satisfactory as it is below the maxi-

mum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%,

contact your local electric utility company immediately.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Operation on improper line voltage or excessive phase imbal-

ance constitutes abuse and may cause damage to electrical

components. Such operation would invalidate any applicable

Carrier warranty.

average voltage

681

227

= 1.78%

227

Units Without Disconnect or HACR Option

Units With Disconnect or HACR Option

Fig. 51 — Power Wiring Connections