Bryant 548F User Manual download pdf (Page 4)

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V. STEP 5 — MAKE ELECTRICAL CONNECTIONS

A. Field Power Supply

All units except 208/230-v units are factory wired for the

voltage shown on the nameplate. If the 208/230-v unit is to

be connected to a 208-v power supply, the transformer must

be rewired by disconnecting the black wire from the 230-v

-in. male spade terminal on the transformer and connect-

ing it to the 208-v

-in. male spade terminal from the

transformer.

Refer to unit label diagram for additional information. Pigtails

are provided for field wire connections. Use factory-supplied

splices or UL (Underwriters’ Laboratories) approved copper/

aluminum connector.

When installing units, provide a disconnect per the NEC. All

field wiring must comply with the NEC and local

requirements.

Install field wiring as follows:

1. Install conduit through side panel openings. For units

without electric heat, install conduit between discon-

nect and control box.

2. Install power lines to terminal connections as shown

in Fig. 6.

3. For units with electric heat, refer to Accessory Elec-

tric Heat Installation Instructions.

During operation, voltage to compressor terminals must be

within range indicated on unit nameplate (also see Tables 2A

and 2B). On 3-phase units, voltages between phases must be

balanced within 2% and the current within 10%. Use the for-

mula shown in Tables 2A and 2B, Note 2, on page 12 to

determine the percentage of voltage imbalance. Operation on

improper line voltage or excessive phase imbalance consti-

tutes abuse and may cause damage to electrical components.

Such operation invalidates any applicable Bryant warranty.

NOTE: If accessory thru-the-bottom connections and roof

curbs are used, refer to the thru-the-bottom accessory instal-

lation instructions for information on wiring the unit.

WARNING:

NOTES:

1. Dimension in ( ) is in millimeters.

2. Hook rigging shackles through holes in base rail, as shown in

detail ‘‘A.’’ Holes in base rails are centered around the unit center

of gravity. Use wooden top skid when rigging to prevent rigging

straps from damaging unit.

3. Unit weights do not include economizer. See Table 1 for econo-

mizer weights.

CAUTION:

All panels must be in place when rigging and

lifting.

UNIT

OPERATING

WEIGHT

DIMENSIONS

‘‘A’’ ‘‘B’’ ‘‘C’’

lb kg in. mm in. mm in. mm

548F036

500 227 73.69 1872 35.50 902 33.31 847

548F048

520 236 73.69 1872 35.50 902 33.31 847

548F060

550 249 73.69 1872 35.50 902 33.31 847

548F072

590 268 73.69 1872 35.50 902 33.31 847

Fig. 4 — Rigging Details

1 2 3 4 5 6 7 8 9 ... 47 48

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Bryant 548F User Manual Page 4

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