Carrier AQUASNAP 30MPA User Manual
Page 15
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EXAMPLE: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
Average Voltage = 243 + 236 + 238
3
= 239 v
Determine maximum deviation from average voltage:
(AB) 243 – 239 = 4 v
(BC) 239 – 236 = 3 v
(AC) 239 – 238 = 1 v
Maximum deviation is 4 v.
Determine percent voltage imbalance:
% Voltage Imbalance = 100 x
4
239
= 1.7%
This amount of phase imbalance is satisfactory as it is below
the maximum allowable 2%.
Table 3 — Electrical Data — 30MPA,MPW Units
LEGEND
*Supply Range — Units are suitable for use on electrical systems
where voltage supplied to the unit terminals is not below or above
the listed range limits.
NOTES:
1. All units have one field power terminal block.
2. Maximum incoming wire size is as follows:
For units with terminal block:
350 kcmil for unit sizes 030-045; 208/230-3-60 voltages.
2/0 for all other unit sizes; all voltages.
For units with optional non-fused disconnect:
350 kcmil for unit sizes:
030-045; 208/230-3-60 voltages.
045; 380-3-60 voltage.
3/0 for unit sizes:
015,020; 208/230-3-60 voltages.
020-040; 380-3-60 voltage.
030-045; 460-3-60 and 575-3-60 voltages.
2 AWG for unit sizes:
015; 380-3-60 voltage.
015-020; 460-3-60 and 575-3-60 voltages.
3. Additional control circuit power is not required.
4. Any field modification of factory wiring must be in compliance
with all applicable codes. Field-installed power wires must be
rated 75 C minimum.
5. Use copper conductors only.
6. Control circuit power supply is 24-v single phase. Control
power is supplied by the factory-installed control transformer.
IMPORTANT: If the supply voltage phase imbalance
is more than 2%, contact your local utility company
immediately.
UNIT SIZE
30MPA,MPW
VOLTS
NAMEPLATE
(3 ph, 60 Hz)
VOLTAGE*
COMPRESSOR
UNIT
Quantity
LRA
(ea.)
MCA
ICF
MOCP
Rec
Fuse
Min
Max
015
208/230
187
253
2
195
66.4
224.5
90
80
380
342
418
123
37.6
139.7
50
45
460
414
508
95
33.1
109.7
45
40
575
518
632
80
27.5
92.2
35
35
020
208/230
187
253
2
239
80.6
274.8
110
90
380
342
418
145
53.4
168.7
70
60
460
414
508
125
40.3
142.9
50
45
575
518
632
80
32.2
94.3
45
40
030
208/230
187
253
2
340
125.6
395.8
175
150
380
342
418
196
76.5
230.0
110
90
460
414
508
179
60.5
205.9
80
70
575
518
632
132
53.3
155.7
70
60
040
208/230
187
253
3
300
166.7
402.6
200
200
380
342
418
139
87.4
192.8
110
100
460
414
508
150
75.1
196.2
90
90
575
518
632
109
64.7
148.8
80
70
045
208/230
187
253
3
340
181.4
451.6
225
200
380
342
418
196
110.5
264.0
125
125
460
414
508
179
87.4
232.8
110
100
575
518
632
132
77.0
179.4
100
90
ICF
— Maximum instantaneous current flow during starting.
kcmil
— Thousand circular mils
LRA
— Locked rotor amps.
MCA
— Minimum circuit amps (for wire sizing). Complies with
NEC, Section 430-24.
MOCP
— Maximum Overcurrent Protection
NEC
— National Electrical Code (U.S.A.)
Rec
Fuse
— Recommended dual element fuse amps (150% of com-
pressor RLA). Size up to the next standard fuse size.