Electrical - Power Wiring - Heat Controller HKV Installation, Operation & Mainenance Manual

IOM Instructions

Electrical - Power Wiring

WARNING!
WARNING! To avoid possible injury or death due to
electrical shock, open the power supply disconnect switch
and secure it in an open position during installation.
CAUTION!
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
WARNING!
WARNING! Disconnect electrical power source to prevent
injury or death from electrical shock.
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.
HKV Power Connection
Line voltage connection is made by connecting the
incoming line voltage wires to the power block as shown in
Figure 6. Consult Table 4a and 4b for correct fuse size.
208 Volt Operation
All 208-230 Volt units are factory wired for 208 Volt. The
transformers may be switched to 230V operation as
illustrated on the wiring diagram by switching the Red
(208V) and the Orange (230V) at the contactor terminal L2.
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 sound transmission
to the building.
HKV LArge CommerCiAL
Thermostat Installation
The thermostat should be located on an interior wall in
a larger room away from supply duct drafts. Do NOT
locate the thermostat in areas subject to sunlight, drafts
or on external walls. The wire access hole behind the
thermostat may in certain cases need to be sealed to
prevent erroneous temperature measurement. Position the
thermostat backplate against the wall so that it appears
level and so the thermostat wires protrude through the
middle of the backplate. Mark the position of the backplate
mounting holes and drill holes with a 3/16" bit. Install
supplied anchors and secure plate to the wall. Thermostat
wire must be 18 AWG wire. Wire the appropriate thermostat
as shown in Figure 10 to the low voltage terminal strip
in the CXMControl as shown in Figure 7 using 18 AWG
thermostat wire of minimum length.
Figure 6: Typical HKV Series Line Voltage
Field Wiring
Figure 7: Low Voltage Field Wiring (CXM
board shown)
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Heat Controller, Inc.