McQuay SWP 095 User Manual

16 IM708
Supply Power Wiring
1. Units require three-phase power supply.
2. Allowable voltage tolerances:
a. 60 Hertz
Nameplate 208V: Min.187V, Max. 229V
Nameplate 230V: Min.207V, Max. 253V
Nameplate 460V: Min.414V, Max. 506V
Nameplate 575V: Min.518V, Max. 632V
b. 50 Hertz
Nameplate 400V: Min. 342V, Max. 418V
3. Power lead wire sizing:
a. For units with cooling capability (all concurrent loads)
with or without hot water heating and circuits with
motor loads only:
MCA = 1.25 (largest motor RLA or FLA) + other loads
+ 2 amps.
b. For units with cooling capability and nonconcurrent
electric heat capability:
In the cooling mode, the loads will be composed of sup-
ply fan motor and compressors. In heating mode, the
loads will be composed of supply fan motor and electric
heater. The MCA is calculated for unit running in either
mode; the highest value obtained is used for the MCA.
(1)For unit in cooling mode:
MCA = 1.25 (largest RLA or FLA) + other loads + 2
amps.
(2)For unit in heating mode:
MCA = 1.25 (electric heat FLA + Fan FLA) + 2 amps.
4. Size wires in accordance with Table 310-16 or 310-19 of
the National Electrical Code.
5. Wires should be sized for a maximum of 3% voltage
drop.
Lug Sizes For Single Disconnect or
Power Block
Note: Use copper wire only.
Table 10. Single Disconnect
UNIT VOLTAGE SIZE (AMPS)
018-028
208/230 225
018-028
400/460 100
018-028
575 100
035-040
208/230 225
035-040
400/460 150
035
575 100
040
575 150
045
208/230 400
045
400/460
150
a
a. Disconnect is 250 amps with electric heat.
045
575 150
055-070
208/230 400
055-070
400/460 250
055-070
575 150
080-095
208/230 600
080-095
400/460 250
080-095
575 250
095-105 (6 Comp)
208/230 N/A
095-105 (6 Comp)
400/460 250
095-105 (6 Comp)
575 250
Table 11. Lug Sizes For Single Disconnect
DISCONNECT SIZE LUG SIZE
100
#6-2/0
150
#2-3/0
225
#3-300 MCM
250
#4-350 MCM
400
250 MCM-500 MCM
600
250 MCM-350 MCM
Table 12. Lug Sizes For Power Block
UNIT VOLTAGE LUG SIZE
018-045
ALL #6-400 MCM
055-105
400/460/575 #6-400 MCM
055-105
208/230 1/0-600 MCM

McQuay SWP 095 Specifications

General

Brand	McQuay
Model	SWP 095
Category	Air Conditioner
Language	English