24
Fig. 45 — Completing Installation of Thru-the-Base
Option
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. 34.
FIELD CONTROL WIRING
The 48HC**14 unit requires an external temperature control
device. This device can be a thermostat (field-supplied) or a
PremierLink™ controller (available as factory-installed option
or as field-installed accessory, for use on a Carrier Comfort
Network
®
or as a standalone control) or the RTU Open Con-
troller for Building Management Systems using non-CCN pro-
tocols (RTU Open controller is available as a factory-installed
option only).
THERMOSTAT
Install a Carrier-approved accessory 2-stage cooling/heating
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 accor-
dance 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. 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 [95°F] minimum). For 50 to
75 ft (15 to 23 m), use no. 16 AWG insulated wire (35°C
[95°F] minimum). For over 75 ft (23 m), use no. 14 AWG insu-
lated wire (35°C [95°F] 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.
Fig. 46 — Typical Low-Voltage Control Connections
UNIT WITHOUT THRU-BASE CONNECTION KIT
Pass the thermostat control wires through the bushing on the
unit end panel. Route the wire through the snap-in wire tie and
up to the web bushing near the control box. Route the wire
through the bushing and into the bottom left side of the control
box after removing one of the two knockouts in the corner of
the box. Using a connector at the control box to protect the
wire as it passes into the control box. Pull the wires over to the
terminal strip at the upper left corner of the Central Terminal
Board (CTB). Use the connector at the control box and the
wire tie to take up any slack in the thermostat wire to ensure
that it will not be damaged by contact with the condenser coil.
See Fig. 47.
NOTE: If thru-the-bottom connections accessory is used, refer to
the accessory installation instructions for information on routing
power and control wiring.
Fig. 47 — Thermostat Wire Routing
HEAT ANTICIPATOR SETTINGS
Set heat anticipator settings at 0.14 amp for the first stage and
0.14 amp for second-stage heating, when available.
Wiring Diagrams
See Fig. 48-50 for wiring diagrams.
GASKET
CONNECTOR
PLATE
ASSEMBLY
X
C
G
W2
C
W2
G
W1
O/B/Y2
Y2
R
W1
R
Y1
Y1
T
H
E
R
M
O
S
T
A
T
(Note 1)
(Note 2)
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2. Do not configure for O output.
Note 2: W2 connection not required on units without electric heating.
Field Wiring
Central
Terminal
Board
Typical
Thermostat
Connections
Thermostat Wire
Summary of Contents for WeatherMaster 48HC14
Page 5: ...5 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 6: ...6 Fig 2 Unit Dimensional Drawing 14 Size Unit cont ...
Page 9: ...9 Fig 4 Roof Curb Details ...
Page 25: ...25 Fig 48 48HC 14 Controls Wiring Diagram 208 230 v 460 v 575 v ...
Page 26: ...26 Fig 49 48HC 14 Power Wiring Diagram 208 230 v 460 v ...
Page 27: ...27 Fig 50 48HC 14 Power Wiring Diagram 575 v ...
Page 29: ...29 Fig 53 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 44: ...44 Fig 62 48HC14 ComfortLink Control Wiring Diagram ...
Page 45: ...45 Fig 63 48HC14 ComfortLink Power Wiring Diagram ...
Page 46: ...46 Fig 64 48HC14 ComfortLink with Humidi MiZer Power Wiring Diagram ...