18
All Units —
All field wiring must comply with NEC and all local
requirements.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 32 and the unit label
diagram for power wiring connections to the unit power
terminal blocks and equipment ground. Refer to Table 4
for maximum wire size at connection lugs.
Provide a ground--fault and short--circuit over--current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over--current Protection) device size.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. See Tables
7 -- 10. 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 7 -- 10 (see Note 2
on page 41) to determine the percent of voltage imbalance.
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 control
transformer must be rewired by moving the black wire
with the
1
/
4
-in. female spade connector from the 230--v
connection and moving it to the 200-v
1
/
4
-in. male
terminal on the primary side of the transformer.
Refer to
unit label diagram for additional information.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
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.
CAUTION
!
NOTE
: Check all factory and field electrical connections
for tightness.
Units Without Factory--Installed
Non--Fused Disconnect —
When installing units, provide a disconnect switch of
adequate size per NEC (National Electrical Code).
Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per
national or local codes. Do not cover unit informative
plate if mounting the disconnect on the unit cabinet.
11
12
13
L1
L3
TB1
208/230-3-60
460-3-60
575-3-60
Disconnect
per
NEC
Units Without Disconnect Option
L2
Units With Disconnect Option
2
4
1
3
5
L1
L2
L3
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
6
C11368
Fig. 32 -- Power Wiring Connections
Units with Factory--Installed Non--Fused Disconnect —
The factory--installed option non--fused disconnect switch
(NFD) is located in a weatherproof enclosure located
under the main control box. The manual switch handle is
accessible through an opening in the access panel. Discard
the factory test leads (see Fig. 32). The factory disconnect
is an 80A disconnect.
C12324
Fig. 33 -- Location of Non--Fused Disconnect Enclosure
581J
*14
Summary of Contents for 581Jx14 series
Page 4: ...4 C11338 Fig 2 Unit Dimensional Drawing 14 Size Unit 581J 14 ...
Page 5: ...5 C11339 Fig 2 Unit Dimensional Drawing 14 Size Unit cont 581J 14 ...
Page 8: ...8 C10772 Fig 4 Roof Curb Details 581J 14 ...
Page 26: ...26 C150061 Fig 47 RTU Open System Control Wiring Diagram 581J 14 ...
Page 27: ...27 C150062 Fig 48 RTU Open System Control Wiring Diagram with Perfect Humidityt 581J 14 ...
