Hacr; Factory- - Option Thru- - Base Connections; Units Without Thru- - Base Connections; Field Control Wiring - Carrier WeatherExpert 50LC Installation Instructions Manual

HACR —
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 (i.e. electric heat, power exhaust, ERV), the HACR
may no longer be of the proper amp rating and therefore
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.
Fig. 30 - - HACR Caution Label
Factory- - Option Thru- - Base Connections —
This service connection kit consists of two
electrical bulkhead connectors and a
bulkhead connector, all factory- - installed in the embossed
(raised) section of the unit basepan in the condenser
3
section. The / - - in. bulkhead connector enables the
4
low- - voltage control wires to pass through the basepan.
1
The / - - in. electrical bulkhead connector allows the
2
high- - voltage power wires to pass through the basepan.
See Fig. 31.
Fig. 31 - - Thru- - Base Connection Fittings
C12105
1
/ - - in.
2
3
/ - - in. electrical
4
LOW VOLTAGE
CONDUIT
CONNECTOR
HIGH VOLTAGE
CONDUIT
CONNECTOR
C13412
Check tightness of connector lock nuts before connecting
electrical 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 through appropriate conduits. Connect the power
conduit to the internal disconnect (if unit is so equipped) or
to the external disconnect (through unit side panel). A hole
must be field cut in the main control box bottom on the left
side so the 24- - v control connections can be made. Connect
the control power conduit to the unit control box at this hole.
Units Without Thru- - Base Connections —
1. Install power wiring conduit through side panel
openings. Install conduit between disconnect and
control box.
2. Install power lines to terminal connections as shown
in Fig. 16.
Field Control Wiring —
The 50LC unit requires an external temperature control
device such as a thermostat (field- - supplied).
Thermostat —
Install a Carrier- - approved accessory thermostat according
to installation instructions included with the accessory.
For complete economizer function and 3 stage compressor
operation select a three- - stage cooling thermostat. If a
3- - stage cooling thermostat is not available use a 2- - stage
cooling thermostat instead, but note that this will limit
cooling to just 2 stages. When electric heat is installed in
the 50LC unit, the thermostat must be capable of
energizing the G terminal (to energize the Indoor Fan
Contactor) whenever there is a space call for heat
(energizing the W1 terminal). The accessory thermostats
listed on the unit price pages can provide this signal but
they are not configured to enable this signal as shipped.
Locate the thermostat accessory on a solid wall in the
conditioned space to sense average temperature in
accordance with the thermostat installation instructions.
If the thermostat contains a logic circuit requiring 24- - v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of eight leads. If the
thermostat does not require a 24- - v source (no "C"
connection required), use a thermostat cable or equivalent
with minimum of seven leads. Check the thermostat
installation instructions for additional features which
might require additional conductors in the cable.
For wire runs up to 50 ft (15 m), use no. 18 AWG
(American Wire Gage) insulated wire (35_C minimum). For
50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire
(35_C minimum). For over 75 ft (23 m), use no. 14 AWG
insulated wire (35_C minimum). All wire sizes larger than
no. 18 AWG cannot be directly connected to the thermostat
and will require a junction box and splice at the thermostat.
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