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UNIT
CONNECT
VOLTAGE
AS
CONNECTIONS
L1: RED +YEL
208,230
240
L2: BLU + GRA
460
480
Splice BLU + YEL
575
600
Fig. 32 — Powered Convenience Outlet Wiring
HACR CIRCUIT BREAKER — The amp rating of the
HACR factory-installed option is based on the size, voltage, in-
door 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., power exhaust, ERV), the HACR cir-
cuit breaker may no longer be of the proper amp rating and
therefore will need to be removed from the unit. See unit name-
plate and label on factory-installed HACR circuit breaker for
the amp rating of the HACR circuit breaker that was shipped
with the unit from the factory. See unit nameplates for the prop-
er fuse, HACR circuit breaker or maximum over-current pro-
tection device required on the unit with field-installed accesso-
ries.
Fig. 33 — HACR Circuit Breaker Caution Label
PRIMARY
TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
L1: RED
H1
H2 + H3
L2: GRA
H4
L1: RED
H1
L2: GRA
H2
FACTORY OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS) — This service connec-
tion kit consists of a
1
/
1
1
/
-in. electrical bulkhead connector, all factory-installed in
4
the embossed (raised) section of the unit basepan in the con-
denser section. The
1
/
-in. bulkhead connector enables the low-
2
voltage control wires to pass through the basepan. The 1
electrical bulkhead connector allows the high-voltage power
wires to pass through the basepan. See Fig. 16.
Check tightness of connector lock nuts before connecting
electrical conduits.
Field-supplied and field-installed liquid-tight conduit con-
nectors 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. 24.
FIELD CONTROL WIRING — The 48HC unit requires an
external temperature control device. This device can be a ther-
mostat (field-supplied) or a PremierLink™ controller (avail-
able as factory-installed option or as field-installed accessory,
for use on a Carrier Comfort Network
trol) or the RTU Open Controller for Building Management
Systems using non-CCN protocols (RTU Open controller is
available as a factory-installed option only).
THERMOSTAT — Install a Carrier-approved accessory 2-
stage thermostat according to installation instructions included
with the accessory. 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 pow-
er, use a thermostat cable or equivalent single leads of different
colors with minimum of seven leads. If the thermostat does not
require a 24-v source (no "C" connection required), use a ther-
mostat cable or equivalent with minimum of six leads. See Fig.
34 for typical low-voltage control connections. Check the ther-
mostat 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 (Ameri-
can Wire Gage) insulated wire (35°C minimum). For 50 to 75
ft (15 to 23 m), use no. 16 AWG insulated wire (35°C mini-
mum). For over 75 ft (23 m), use no. 14 AWG insulated wire
(35°C minimum). All wire sizes larger than no. 18 AWG can-
not be directly connected to the thermostat and will require a
junction box and splice at the thermostat.
UNIT WITHOUT THRU-BASE CONNECTION KIT —
Pass the thermostat control wires through the hole provided in
the end panel (see item "D" in the view labeled "LEFT" in Fig.
2 or Fig. 3); then feed the wires through the raceway built into
the corner post to the control box. Pull the wires over to the ter-
minal strip on the upper-left corner of the Central Terminal
Board (CTB). See Fig. 35.
NOTE: If thru-the-bottom connections accessory is used, refer
to the accessory installation instructions for information on
routing power and control wiring.
21
-in. electrical bulkhead connector and a
2
®
or as a stand alone con-
1
/
-in.
4
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