IM 1137-4 • TEMPLIFIER
®
MODEL TGZ
30 www.DaikinApplied.com
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Electrical Notes
Field Wiring
The TGZ units are supplied as standard with compressor contactors
and power terminal block, designed for multi-point power supply to the
unit, no compressor circuit breakers. Available options are:
1. Single-point connection to power block with compressor circuit
breakers
2. Single-point connection to disconnect switch with compressor circuit
breakers
3. High short circuit current rating with single-point disconnect switch
(excluding 575V units)
4. Multi-point connection to disconnect switch, no compressor circuit
breakers
5. The supplemental overloads option is used to reduce the required
electrical service size and wire sizing for units under 140°F leaving
condenser water temperature.
A factory-installed control circuit transformer is standard. Optionally, a
field-installed control power source can be wired to the unit.
Wiring and conduit selections must comply with the National Electrical
Code and/or local requirements.
An open fuse indicates a short, ground, or overload. Before replacing a
fuse or restarting a compressor, the root cause must be identified and
corrected. Tables in the Electrical Data section (starting with
Table 20
on page 32)
give specific information on recommended wire sizes.
Unit power inlet wiring must enter the control box through the right
side. A 7/8-inch pilot knockout is provided. Refer to the unit dimension
drawings beginning with
Figure 17 on page 19
for the location of
power (and control) connections.
CAUTION
To avoid equipment damage, use only copper conductors in
main terminal block.
Notes for “Electrical Data Single Point” Power
1. If a separate 115V power supply is used for the control circuit, then
the wire sizing 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. Therefore, it is recommended
that power leads be kept short. All terminal block connections must be
made with copper 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 NEC Handbook.
4. Must be electrically grounded according to national and local
electrical codes.
Voltage Limitations
1. /- 10% 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
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 a 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.
Panel Ratings
Units without Supplemental Overloads
Table 18: Standard Panel Short Circuit Current Ratings
Table 19: Optional Panel Ratings (kA)
NOTE:
High Short Circuit Current Rating (HSCCR) provides all
panel components rated per above table and is so labeled.
TGZ-B Model Size
Voltage
Hz
40
050-100
110-190
208-230
60
5
5
10
380
60
5
5
5
400
50
5
5
5
460
60
5
5
5
575
60
5
5
5
Voltage
Hz
Options, Single-Point Power
Connection Only
208-230
60
100
380
60
65
400
50
65
460
60
65
575
60
Not Available
