Wiring
VFDB-SVX001A-EN
47
Detailed Field Wiring Points
Input Power and Interconnection Wiring
identifies the required power wiring and control
wiring related to the MV Drive
1
. The Overview illustrates
the scope of the field drive related wiring (see
). The MV drive provides 115 Vac as required for its
internal circuits; however, it does not provide the 115 Vac
to power up the chiller. Therefore, either the chiller
requires external 115 Vac or the CPTR transformer requires
its line voltage. Refer to sales order specifications. Items 1
through 9 are identified on
.
1
Refer to the chiller
Installation, Operation, and Maintenance
manual for chiller control wiring requirements.
Table 5.
Power and control wiring
Reference #
1.
Three-phase line voltage supply to MV drive. (Voltage per sales order.)
L1 to L1
L2 to L2
L3 to L3
Grd to Grd
2.
MV drive to CTV motor terminals.
illustrates the connection to the chiller motor
terminals.
T1 to T1
T2 to T2
T3 to T3
3.
Cross power wiring between input starter and drive panel
1U to 1U
1V to 1V
1W to 1W
4.
Chiller Control power
Chiller control power can be supplied at 115 Vac if without the CPTR transformer, or at a specified voltage if the step
down transformer CPTR is specified.
Models CDHF, CDHG, CVHE, CVHF, and CVHG
4a) Without CPTR—Connect 115 Vac 40 amps 4 kVA:
L1 to 1X1-1 Wire #1A
L2 to 1X1-12 Wire #2A
Ground to 1X1-G Ground wire
4b) With CPTR transformer—Connect sales order specified
voltage:
L1 to 4S1-L1
L3 to 4S1-L3
Ground to Ground
Models CDHH and CVHH
With CPTR transformer—Connect sales order specified
voltage:
L1 to 6Q1-L1
L2 to 6Q1-L2
Ground to Ground
5.
High pressure cutout interlock to GateKill (Dry contact input; apply no external power)
Models CDHF, CDHG, CVHE, CVHF, and CVHG
1X1-3 to 3B; wire #3B
1X1-4 to 4B; wire #4B
Models CDHH and CVHH
1X1-3 to 3B; wire #9E
1X1-4 to 4B; wire #4H
6.
Oil pump interlock (115 Vac circuit; apply no external power)
Models CDHF, CDHG, CVHE, CVHF, and CVHG
1A7-J2-4 to 9A Wire #9A
1A7-J2-2 to 10A Wire #10A
Models CDHH and CVHH
1X1-10 to 9A Wire #6F
1X1-21 to 10A Wire #53F
7.
Remote stop interlock (Must be jumpered if not used)
2436
2437