Bryant 542J Series, Инструкция по установке, запуску и обслуживанию

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Table 2 — Electrical Data
UNIT
542J
VOLTAGE
(3 Ph,
60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OUTDOOR
FAN
MOTOR
INDOOR FAN
MOTOR
POWER
EXHAUST
ELECTRIC HEAT* POWER SUPPLY
DISCONNECT
SIZING
No. 1 No. 2
Min Max RLA LRA RLA LRA Qty
FLA
(ea)
Hp FLA FLA LRA FLA kW MCA MOCP† RLA LRA
150
208/230 187 253 39.7 228 — — 3 1.7 3.7 10.5/10.5
— —
−/−
39/ 45
72/ 82
117/135
−/−
14/19
26/34
42/56
65/ 65
114/122
155/168
211/200
100/100
125/150
175/175
225/225 64/ 64
64/ 64
94/107
147/167
387/387
4.6 18.8
−/−
39/ 45
72/ 82
117/135
−/−
14/19
26/34
42/56
70/ 70
119/126
159/173
216/205
100/100
125/150
175/175
225/225 69/ 69
69/ 69
100/112
152/173
406/406
460 414 508 19.9 114 — — 3 0.8 3.7 4.8
— —
—
18
39
66
—
15
32
55
32
54
81
98 50
60
90
110
31
31
50
82
189
2.3 6.0
—
18
39
66
—
15
32
55
34
57
83
100
50
70
90
110
34
34
53
84
195
180
208/230 187 253 28.2 160 28.2 160 3 1.7 5 15.8/15.8
— —
—/—
72/ 82
117/135
—/—
26/34
42/56
84/ 84
174/187
231/219
110/110
175/200
250/225
89/ 89
101/112
153/173 499/485
4.6 18.8
—/—
72/ 82
117/135
—/—
26/34
42/56
89/ 89
179/191
235/224
110/110
200/200
250/225
94/ 94
106/118
158/179 518/504
460 414 508 14.1 80 14.1 80 3 0.8 5 7.9
— —
—
39
66
—
32
55
42
91
108
50
100
110
44
54
85
238
2.3 6.0
—
39
66
—
32
55
44
93
110
50
100
125
47
57
88
244
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
RLA — Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v and 480 v. If
power distribution voltage to unit varies from rated heater voltage, heater kW will
vary accordingly.
†Fuse or HACR circuit breaker. This is the maximum size permissible; smaller
fuse size may be used where conditions permit.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-
ment (refer to NEC Articles 430 and 440), the overcurrent protective device for
the unit shall be fuse or HACR breaker. The Canadian units may be fuse or
circuit breaker.
2. MCA calculation for units with electric heaters over 50 kW
= (1.25 x IFM amps) + (1.00 x heater FLA).
3. 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 percent of voltage
imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
Determine maximum deviation from average voltage.
(AB) 457 − 452 = 5 v
(BC) 464 − 457 = 7 v
(AC) 457 − 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum
allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
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