Factory- - Option Thru- - Base Connections; Units Without Thru- - Base Connections; Field Control Wiring; Thermostat - Carrier 50TC Series Installation Instruction

Factory- - Option Thru- - Base Connections —
This service connection kit consists of a
bulkhead connector and a 1
connector, all factory- - installed in the embossed (raised)
section of the unit basepan in the condenser section. The
1
/ - - in bulkhead connector enables the low- - voltage control
2
wires to pass through the basepan. The 1
bulkhead connector allows the high- - voltage power wires
to pass through the basepan. See Fig. 24.
Fig. 24 - - Thru- - Base Connection Fittings
Check tightness of connector lock nuts before connecting
electrical conduits.
Field- - supplied and field- - installed liquidtight 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 open-
ings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown
in Fig. 19.
Field Control Wiring —
The 50TC unit requires an external temperature control
device. This device can be a thermostat (field- - supplied) or a
PremierLinkt controller (available as factory- - installed
option or as field- - installed accessory, for use on a Carrier
Comfort Network or as a stand alone control) or the RTU
Open Controller for Building Management Systems using
non- - CCN protocols. The RTU Open controller is available
as a factory- - installed option only.
1
/ - - in electrical
2
1
/ - - in electrical bulkhead
4
1
/ - - in electrical
4
LOW VOLTAGE
CONDUIT
CONNECTOR
HIGH VOLTAGE
CONDUIT
CONNECTOR
C13412
Thermostat —
Install a Carrier- - approved accessory thermostat according to
installation instructions included with the accessory. For
complete economizer function, select a two- - stage cooling
thermostat. 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 seven leads. If the
thermostat does not require a 24- - v source (no "C"
connection required), use a thermostat 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 insulated 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.
Typical

Thermostat

Connections
C
G
W2
(Note 2)
W1
O/B/Y2
(Note 1)
Y1
R
Note 1: Typical multi-function marking. Follow manufacturer's configuration
instructions to select Y2.
Note 2: W2 connection not required on units with single-stage heating.
Field Wiring
Fig. 25 - - Typical Low- - Voltage Control Connections
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 and 3); then feed the wires through the raceway
built into the corner post to the control box. Pull the wires
over to the terminal strip on the upper- - left corner of the
Central Terminal Board. (CTB) See Fig. 26.
18
Central
Terminal
Board
X X
C C
G G
W2 W2
W1 W1
Y2 Y2
Y1 Y1
R
R
T–STAT
C09351