Technical information

Page: 14
VL Series Portable Chillers, 2 to 40 Tons UGH021/0301
cause a significant hazard that may result in serious
personal injury and unit damage.
2. A customer supplied, four conductor cable is required for
connection to a customer supplied fused disconnecting
means. The fused disconnecting means shall be sized and
installed according to the unit’s power supply requirements
and local electrical codes. See figure 2.5A (next page) for
details on water cooled power cable routing.
3. Connect the four conductor power cable to power entry
terminal block on the unit’s electrical panel. Then connect
the power cable to the fused disconnect switch.
B. NEMA 12 MODELS
1. NEMA 12 units are constructed with a dust tight electrical
enclosure and branch circuit fusing. Electrical power supply
requirements are identified on the equipment data plate.
Determine the plant’s voltage supply is the same as the
unit’s voltage requirements. WARNING: Do not connect
the unit to a voltage supply source not equal to the
unit’s voltage requirements as specified on the unit’s
data plate. Use of incorrect voltage will void the unit’s
warranty and cause a significant hazard that may result
in serious personal injury and unit damage.
2. Appropriate conduit and fittings should be selected which
will maintain the integrity of the cabinet.
3. Supply a power conductor sized according to the unit’s
power supply requirements. Connect the power conductor
to the unit’s power supply entry terminal block or the fused
disconnect switch. Some Nema 12 models may be supplied
with an optional disconnect switch. The owner supplied
fused disconnecting means shall be sized and installed
according to the unit’s power supply requirements and
local electrical codes.
C. CONTROL CIRCUIT WIRING
1. The unit’s supplied control circuit is 110 volt, 1 phase, 60
cycle. The control circuit is supplied by the factory installed
transformer. An inline control circuit fuse is provided.
D. GENERAL
1. Make certain all ground connections to the unit are
properly affixed.
2. Make certain power conductor, disconnecting means, and
fusing are properly sized according to the unit’s power
supply requirements.