Bryant 580J*04A, Руководство по установке

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UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT — When installing units, provide a
disconnect switch per NEC (National Electrical Code) of ade-
quate size. Disconnect sizing data is provided on the unit infor-
mative plate. Locate on unit cabinet or within sight of the unit
per national or local codes. Do not cover unit informative late if
mounting the disconnect on the unit cabinet.
All Units — Field wiring must comply with NEC and all local
codes. Size wire based on MCA (Minimum Circuit Amps) on
the unit informative plate. See Fig. 23 and the unit label dia-
gram for power wiring connections to the unit power terminal
blocks and equipment ground. Maximum wire size is #4 ga
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.
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. fe-
male 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 informa-
tion.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. See Tables 7
and 8. On 3-phase units, voltages between phases must be bal-
anced within 2% and the current within 10%. Use the formula
shown in the legend for Tables 7 and 8 to determine 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 invali-
date any applicable Bryant warranty.
NOTE: Check all factory and field electrical connections
for tightness.
Table 7 — Unit Wire/Fuse or HACR Breaker Sizing Data — 2-Speed Indoor Fan Motor
LEGEND AND NOTES FOR TABLES 7 AND 8
LEGEND
1. In compliance with NEC requirements for multimotor and combination
load equipment (refer to NEC Articles 430 and 440), the overcurrent
protective device for the unit shall be fuse or HACR breaker. Canadian
units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage:
Never operate a motor where a phase imbalance in supply voltage is greater than
2%. Use the following formula to determine the percentage of voltage imbalance:
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
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.
This amount of phase imbalance is satisfactory as it is below the maximum allow-
able 2%.
UNIT
NOM. V-PH-
HZ
IFM
TYPE
NO C.O. OR UNPWR C.O. WITH PWRD C.O.
NO P.E.
WITH P.E. (POWERED
FROM UNIT)
NO P.E.
WITH P.E. (POWERED
FROM UNIT)
MCA
FUSE
OR
HACR
BRKR
DISC. SIZE
MCA
FUSE
OR
HACR
BRKR
DISC. SIZE
MCA
FUSE
OR
HACR
BRKR
DISC. SIZE
MCA
FUSE
OR
HACR
BRKR
DISC. SIZE
FLA LRA FLA LRA FLA LRA FLA LRA
580J*A07
208/230-3-60
STD 34/33 50/50 32/32 167 35/35 50/50 35/34 169 38/38 50/50 38/38 172 40/40 50/50 40/40 174
MED 35/34 50/50 34/33 193 37/36 50/50 36/35 195 40/39 50/50 40/39 198 42/41 60/60 42/41 200
HIGH 37/36 50/50 37/36 217 39/38 50/50 39/38 219 42/41 60/60 42/41 222 44/43 60/60 44/43 224
460-3-60
STD 15 20 14 82 16 20 15 83 17 20 17 84 18 25 18 85
MED 15 20 15 95 16 20 16 96 18 25 17 97 19 25 18 98
HIGH 16 20 16 107 17 25 17 108 19 25 19 109 20 25 20 110
575-3-60
STD 13 15 12 70 15 20 14 72 15 20 14 72 16 20 16 74
MED 14 15 13 79 16 20 16 81 16 20 15 81 17 20 18 83
HIGH 14 15 13 79 16 20 16 81 16 20 15 81 17 20 18 83
BRKR — Circuit breaker
C.O. — Convenience outlet
DD — Direct drive
DISC — Disconnect
FLA — Full load amps
IFM — Indoor fan motor
LRA — Locked rotor amps
MCA — Minimum circuit amps
MOCP — MAX FUSE or HACR circuit breaker
P.E. — Power exhaust
PWRD C.O. — Powered convenience outlet
UNPWR C.O. — Unpowered convenience outlet
% Voltage Imbalance = 100 x
max voltage deviation from average voltage
average voltage
Average Voltage = 100 x
(224 + 231 + 226)
=
681
= 227
3 3
A B C
MOTOR
% Voltage Imbalance = 100 x
4
= 1.76%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.