Units Without Thru-Base Connections; Field Control Wiring; Thermostat - Carrier WeatherMaster 48HC07 Series Installation Instructions Manual

UNIT CONNECT
VOLTAGE AS CONNECTIONS
L1: RED +YEL
208,230 240
L2: BLU + GRA
460 480 Splice BLU + YEL
575 600
Fig. 35 — Powered Convenience Outlet Wiring
HACR CIRCUIT BREAKER
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 acces-
sories are added or changed in the field (i.e., power exhaust,
ERV), the HACR circuit breaker may no longer be of the prop-
er amp rating and therefore will need to be removed from the
unit. See unit nameplate 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 name-
plates for the proper fuse, HACR circuit breaker or maximum
over-current protection device required on the unit with field-
installed accessories.
Fig. 36 — 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 (ELEC-
TRICAL CONNECTIONS)
This service connection kit consists of a
head connector and a 1
factory-installed in the embossed (raised) section of the unit
basepan in the condenser section. The
tor enables the low-voltage control wires to pass through the
basepan. The 1 1 / -in. electrical bulkhead connector allows the
4
high-voltage power wires to pass through the basepan. See
Fig. 19.
Check tightness of connector lock nuts before connecting elec-
trical conduits.
Field-supplied and field-installed liquid-tight conduit connec-
tors and conduit may be attached to the connectors on the base-
pan. 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 connec-
tions 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. 27.

FIELD CONTROL WIRING

The 48HC unit requires an external temperature control device.
This device can be a thermostat (field-supplied) or a Premier-
Link™ controller (available as factory-installed option or as
field-installed accessory, for use on a Carrier Comfort Net-
work ® or as a stand alone control) 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 accord-
ing to installation instructions included with the accessory. Lo-
cate 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 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.
37 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 (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.
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. 38.
NOTE: If thru-the-bottom connections accessory is used, refer to
the accessory installation instructions for information on routing
power and control wiring.
24
1 / -in. electrical bulk-
2
1 / -in. electrical bulkhead connector, all
4
1 / -in. bulkhead connec-
2