IOM 1322-1 • WATER-COOLED SCROLL COMPRESSOR 26 www.DaikinApplied.com
Electrical Data
Electrical Notes
Notes for “Electrical Data Single Point” Power:
1. If a separate 115V power supply is used for the control
circuit, then the wire sizing amps is 10 amps for all unit
sizes.
2. Recommended power lead wire sizes for 3 conductors
per conduit are based on 100% conductor ampacity
in accordance with NEC. Voltage drop has not been
included. It is recommended that power leads be kept
short. All terminal block connections must be made with
copper (type THW) wire.
3. The recommended power lead wire sizes are based
on an ambient temperature of 86°F (30°C). Ampacity
correction factors must be applied for other ambient
temperatures. Refer to the National Electrical Code
Handbook.
4. Must be electrically grounded according to national and
local electrical codes.
Voltage Limitations:
1. /- 10 percent of nameplate rating
2. Voltage unbalance not to exceed 2% with a resultant
current unbalance of 6 to 10 times the voltage unbalance
per NEMA MG-1, 1998 Standard. This is an important
restriction that must be adhered to.
Notes for “Field Wiring Data”
1. Requires a single disconnect to supply electrical power
to the unit. This power supply must either be fused or
use an HACR type circuit breaker.
2.
All field wiring to unit power block or optional non-fused
disconnect switch must be copper.
3.
All field wire size values given in table apply to 75°C
rated wire per NEC.
Supplemental Overloads Option
The supplemental overloads option is used to reduce the
required electrical service size and wire sizing (cost) to the
water cooled version of WGZ chillers. The overload option
is only available for models with single point electrical power
connections, and can only be used if the condenser leaving
water temperature is 105°F or less.
Circuit Breakers
The circuit breaker used in the High Short Circuit panel option
may have a higher trip rating than the unit Maximum Overload
Protection (MOP) value shown on the unit name plate. The
circuit breaker is installed as a service disconnect switch and
does not function as branch circuit protection, mainly that the
protection device must be installed at the point of origin of the
power wiring. The breaker (disconnect switch) is oversized to
avoid nuisance trips at high ambient temperature conditions.
Panel Ratings
Table 16: Multi-point Power Standard Panel Ratings
Voltage
Hz
WGZ-D Model Size
WGZ 030-040
WGZ 045-200
With Overloads Without Overloads
208-230
60
5 kA
5 kA
380
60
5 kA
5 kA
400
50
5 kA
5 kA
460
60
5 kA
5 kA
575
60
N/A
5 kA
5 kA
Table 17: Single Point Power Standard Panel Ratings -
Units without Overloads
Voltage
Hz
WGZ-D Model Size
WGZ 030-070
WGZ 080-200
208-230
60
10 kA
10 kA
380
60
10 kA
10 kA
400
50
10 kA
10 kA
460
60
10 kA
10 kA
575
60
5 kA
10 kA
Table 18: Single Point Power Standard Panel Ratings -
Units with Overloads
Voltage
Hz
WGZ-D Model Size
WGZ 030-040
WGZ 045-070
WGZ 080-200
208-230
60
10 kA
10 kA
10 kA
380
60
10 kA
10 kA
10 kA
400
50
10 kA
10 kA
10 kA
460
60
10 kA
10 kA
10 kA
575
60
N/A
5 kA
10 kA
Table 19: Single Point Power Optional HSCCR Ratings -
Units without Overloads
Voltage
Hz
WGZ-D Model Size
WGZ 030-045 WGZ 050-090 WGZ 100-150 WGZ 170-200
208-230
60
100 kA
100 kA
100 kA
N/A
380
60
65 kA
65 kA
65 kA
65 kA
400
50
65 kA
65 kA
65 kA
65 kA
460
60
65 kA
65 kA
65 kA
65 kA
575
60
25 kA
18 kA
25 kA
30 kA
Table 20: Single Point Power Optional HSCCR Ratings -
Units with Overloads
Voltage
Hz
WGZ-D Model Size
WGZ 030-040
WGZ 045-060
WGZ 070-200
208-230
60
100 kA
100 kA
100 kA
380
60
65 kA
65 kA
65 kA
400
50
65 kA
65 kA
65 kA
460
60
65 kA
65 kA
65 kA
575
60
N/A
25 kA
18 kA
Electrical Data
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