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All field installed wiring, including electrical ground,
must comply with the National Electrical Code as well as
all applicable local codes.
Refer to the unit wiring diagrams for fuse sizes and a
schematic of the field connections which must be made
by the installing (or electrical) contractor.
Consult the unit wiring diagram located on the inside of
the compressor access panel to ensure proper electrical
hookup.
All final electrical connections must be made with a
length of flexible conduit to minimize vibration and
transmission.
General Line Voltage Wiring
Be sure the available power is the same voltage and
phase as that shown on the unit serial plate. Line and low
voltage wiring must be done in accordance with local
codes or the National Electric Code, whichever is
applicable.
GT-S Power Connection
Line voltage connection is made by connecting the
incoming line voltage wires to the “L” side of the
contactor as shown in Figure 14. Consult Table 7 for
correct wire and fuse size.
External Loop Power Connection
If the unit is to be used with an external loop pump, the
pump(s) will be connected to the loop pump wires in the
flow controller compartment as shown in Figure 3. The
pumps will automatically be cycled as required by the
unit.
To avoid possible injury or death due to electri-
cal shock, open the power supply disconnect
switch and secure it in an open position during
installation.
CAUTION: Use only copper conductors for
field installed electrical wiring. Unit terminals
are not designed to accept other types of con-
ductors.
ELECTRICAL - LINE VOLTAGE
Table 7 GT-S Electrical Data.
Figure 14. GT-S Line Voltage Field Wiring.
FCR
CRR
CCM PCB
HPS
LPS
Y
X
C
T
Note: See FC Mounting for Flow Controller Wiring
Consult Electrical Table for wire and fuse size.
All power wiring per local code
C
A
L
R
O
Y
CRC
Grnd
L2
L1
T2
T1
CC
R a t e d
V o l t a g e
Compressor
E x t
Total
Min
Max
S u p p l y
M o d e l
V o l t a g e
Min/Max
P u m p
Unit
Circ
F u s e /
Wire
M C C
R L A
L R A
F L A
F L A
Amp
H A C R Min AWG
Max Ft
018
208-230/60/1
197/254
11.0
7.1
39.0
4.0
11.1
12.9
20
12
90
024
208-230/60/1
197/254
16.0
10.3
56.0
4.0
14.3
16.8
25
10
120
030
208-230/60/1
197/254
19.0
12.2
67.0
4.0
16.2
19.2
30
10
100
036
208-230/60/1
197/254
21.0
13.5
73.0
4.0
17.5
20.8
30
10
100
042
208-230/60/1
197/254
25.8
16.5
95.0
4.0
20.5
24.7
40
8
120
048
208-230/60/1
197/254
28.6
18.3
109.0
4.0
22.3
26.9
45
8
110
060
208-230/60/1
197/254
39.0
25.0
169.0
4.0
29.0
35.2
60
6
140
HACR circuit breaker in USA only
Wire length based on one way measurement with 2% voltage drop
Wire size based on 60°C copper conductor
All fuses Class RK-5
