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HACR BREAKER (OPTION)
The amp rating of the HACR factory-installed option is based on
the size, voltage, indoor motor, and other electrical options of the
unit as shipped from the factory. If field-installed accessories are
added or changed in the field (e.g., electric heat, power exhaust),
the HACR may no longer be of the proper amp rating and there-
fore will need to be removed from the unit. See unit nameplate
and label on factory-installed HACR for the amp rating of the
HACR that was shipped with the unit from the factory. See unit
nameplates for the proper fuse, HACR or maximum over-current
protection device required on the unit with field-installed
accessories. See Fig. 38.
Fig. 38 — HACR Caution Label
FACTORY-OPTION THRU-BASE CONNECTIONS
This service connection kit consists of a 1/2 in. electrical bulkhead
connector and a 1-1/2 in. electrical bulkhead connector, connected
to an "L" bracket covering the embossed (raised) section of the
unit basepan in the condenser section. (See Fig. 39.) The 1/2 in.
bulkhead connector enables the low-voltage control wires to pass
through the basepan. The 1-1/2 in. electrical bulkhead connector
allows the high-voltage power wires to pass through the basepan.
1-1/2 in.
Electrical
Bulkhead
Connector
Fig. 39 — Thru-the-Base Option, Shipping Position
1.
Remove the "L" bracket assembly from the unit.
2.
Remove connector plate assembly from the "L" bracket
and discard the "L" bracket, but retain the washer head
screws and the gasket (located between the "L" bracket
and the connector plate assembly).
NOTE: Take care not to damage the gasket, as it is reused in the
following step.
3.
Place the gasket over the embossed area in the basepan,
aligning the holes in the gasket to the holes in the basepan.
(See Fig. 40.)
4.
Install the connector plate assembly to the basepan using 8
of the washer head screws.
NOTE: If electrical connections are not going to occur at this time,
tape or otherwise cover the fittings so that moisture does not get
into the building or conduit in the interim.
Fig. 40 — Installing Thru-the-Base Option
Check tightness of connector lock nuts before connecting electri-
cal conduits.
Field-supplied and field-installed liquid tight conduit connectors
and conduit may be attached to the connectors on the basepan.
Pull correctly rated high voltage and low voltage wires through
appropriate conduits. Connect the power conduit to the internal
disconnect (if unit is equipped) or to the external disconnect
(through unit side panel). Remove one of the two knockouts locat-
ed on the bottom left side of the unit control box. Use this hole for
the control conduit.
UNITS WITHOUT THRU-BASE CONNECTIONS
1.
Install power wiring conduit through side panel openings.
2.
Install conduit between disconnect and control box.
3.
Install power lines to terminal connections as shown in
Fig. 28.
FIELD CONTROL WIRING
1/2 in.
Electrical
Unit requires a field-installed and wired supply air temperature
Bulkhead
sensor for proper operation. Additional control and communica-
Connector
tion wiring for space sensors, thermostat, or a building automation
system (BAS), may be needed based on project requirements. See
the Controls, Start-up, Operation, Troubleshooting, and Mainte-
nance manual for additional details on sensor usage. See the sen-
sor installation instructions for wiring and installation details.
NOTE: Unit controls are not compatible with Rnet sensors or
interfaces.
NOTE: Ensure all low and high voltage wiring are separated in ac-
cordance with UL and NEC requirements.
28
Connector
Plate
Assembly
Gasket
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