Bryant LEGACY 580J*20M Series, Installation Instructions Manual

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Fig. 24 — Disconnect Switch and Unit
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT — When installing units, provide a discon-
nect switch per NEC (National Electrical Code) of adequate
size. Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per na-
tional or local codes. Do not cover unit informative plate if
mounting the disconnect on the unit cabinet.
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT —
The factory-installed option non-fused dis-
connect switch (NFD) is located in the main control box. The
manual switch handle and shaft are shipped in the control box
and must be mounted on the corner post adjacent to the control
box (see Fig. 25). Note that the tape covering the hole for the
shaft in the corner post must be removed prior to handle and
shaft installation.
TO FIELD INSTALL THE NFD SHAFT AND HAN-
DLE:
1. Open the control box panel.
2. Make sure the NFD shipped from the factory is at OFF po-
sition (the arrow on the black handle knob or on the silver
metal collar is at OFF).
3. Insert the shaft with the cross pin on the top of the shaft in
the horizontal position.
4. Measure the tip of the shaft to the outside surface of the
corner post to be 0.88 in.
5. Tighten the locking screw to secure the shaft to the NFD.
6. Turn the handle to OFF position with red arrow pointing at
OFF.
7. Install the handle on to the corner post vertically with the
red arrow pointing up.
8. Secure the handle to the corner post with (2) screws and
lock washers supplied.
Fig. 25 — Handle and Shaft Assembly for NFD
ALL UNITS — All field wiring must comply with NEC and
all local code requirements.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 26 for power wiring connections
to the unit power terminal block and equipment ground. Maxi-
mum wire size is 2/0 AWG per pole.
Provide a ground-fault and short-circuit over-current protec-
tion device (fuse or breaker) per NEC Article 440 (or local
codes). Refer to unit informative data plate for MOCP (Maxi-
mum Over-current Protection) device size.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. On 3-phase
units, voltages between phases must be balanced within 2% and
the current within 10%. Use the formula shown in the legend for
Tables 24-25 on page 50 (Note 2) to determine the percent of
voltage imbalance.
COPPER
WIRE ONLY
ELECTRIC
DI S CONNECT
S WITCH
ALUMINUM
WIRE
CAUTION
Failure to follow this caution may result in equipment dam-
age.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable Bryant warranty.