Bryant 548F - Manual (Page 4)

— 4 —
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
1 /
4
-in. male spade terminal on the transformer and connect-
ing it to the 208-v 1 /
4
-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:
 
   
 




  
  
      
 

  
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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