Carrier AQUASNAP 30MPA, Руководство по установке

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16
Connections for condenser flow switch, chilled fluid pump
interlock, condenser pump interlock, remote alarm output, con-
denser output, and dual chiller thermistor accessory are made at
these locations. See Fig. 17 for specific location of connec-
tions.
The unit has the capability to control field-supplied devices.
They are: alarm signal, condenser pump or condenser fan out-
put, and chilled water pump output. The unit provide 24-v
power with a minimum 5 va rating per output allowed.
UNBALANCED 3-PHASE SUPPLY VOLTAGE —
Never
operate a compressor where a phase imbalance in the supply
voltage is greater than 2% . Use the following formula to deter-
mine the percent voltage imbalance:
% Voltage Imbalance =
100 x
max voltage deviation from average voltage
average voltage
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 8 — Electrical Data — 30MPA,MPW Units
LEGEND
*Supply Range — Units are suita b le for use on electrical systems
where voltage supplied to the unit terminals is not b elow or a b ove
the listed range limits.
NOTES:
1. All units have one field power terminal b lock.
2. Maximum incoming wire size is as follows:
For units with terminal b lock:
350 kcmil for unit sizes 030-045; 20 8 /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; 20
8 /230-3-60 voltages.
045; 3 8 0-3-60 voltage.
3/0 for unit sizes:
015,020; 20
8 /230-3-60 voltages.
020-040; 3 8 0-3-60 voltage.
030-045; 460-3-60 and 575-3-60 voltages.
2 AWG for unit sizes:
015; 3
8 0-3-60 voltage.
015-020; 460-3-60 and 575-3-60 voltages.
3. Additional control circuit power is not re q uired.
4. Any field modification of factory wiring must b e in compliance
with all applica b le codes. Field-installed power wires must b e
rated 75 C minimum.
5. Use copper conductors only.
6. Control circuit power supply is 24-v single phase. Control
power is supplied b y 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
20 8 /230 1 8 7 253
2
195 66.4 224.5 90 8 0
3 8 0 342 41 8
123 37.6 139.7 50 45
460 414 50 8
95 33.1 109.7 45 40
575 51 8 632
8 0 27.5 92.2 35 35
020
20 8 /230 1 8 7 253
2
239 8 0.6 274. 8 110 90
3 8 0 342 41 8
145 53.4 16 8 .7 70 60
460 414 50 8
125 40.3 142.9 50 45
575 51 8 632
8 0 32.2 94.3 45 40
030
20 8 /230 1 8 7 253
2
340 125.6 395. 8 175 150
3 8 0 342 41 8
196 76.5 230.0 110 90
460 414 50 8
179 60.5 205.9 8 0 70
575 51 8 632
132 53.3 155.7 70 60
040
20 8 /230 1 8 7 253
3
300 166.7 402.6 200 200
3 8 0 342 41 8
139 8 7.4 192. 8 110 100
460 414 50 8
150 75.1 196.2 90 90
575 51 8 632
109 64.7 14 8 . 8 8 0 70
045
20 8 /230 1 8 7 253
3
340 1 8 1.4 451.6 225 200
3 8 0 342 41 8
196 110.5 264.0 125 125
460 414 50 8
179 8 7.4 232. 8 110 100
575 51 8 632
132 77.0 179.4 100 90
AWG — American Wire Gage
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
Rec
Fuse — Recommended dual element fuse amps (150% of com-
pressor RLA). Size up to the next standard fuse size.
RLA — Rated Load Amps