Unit without Thru-Base Connection Kit --
Pass the thermostat control wires through the hole
provided in the corner post; 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 Controls Connection Board. See Fig. 26.
RACEWAY
HOLE IN END PANEL (HIDDEN)
C08027
Fig. 26 - Field Control Wiring Raceway
NOTE: If thru-the-bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
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.
Electric Heaters
50TC units may be equipped with field-installed
accessory electric heaters. The heaters are modular in
design, with heater frames holding open coil resistance
wires strung through ceramic insulators, line-break limit
switches and a control contactor. One or two heater
modules may be used in a unit.
Heater modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 27, Fig. 28 and Fig. 29.
Not all available heater modules may be used in every
unit. Use only those heater modules that are UL listed for
use in a specific size unit. Refer to the label on the unit
cabinet for the list of approved heaters.
Unit heaters are marked with Heater Model Numbers. But
heaters are ordered as and shipped in cartons marked with
a corresponding heater Sales Package part number. See
Table 2 for correlation between heater Model Number and
Sales Package part number.
NOTE: The value in position 9 of the part number differs
between the sales package part number (value is 1) and a
bare heater model number (value is 0).
DISCONNECT MOUNTING
LOCATION
UNIT BLOCK-OFF
PANEL
INDOOR
OUTDOOR ACCESS
ACCESS PANEL PANEL
C08133
Fig. 27 - Typical Access Panel Location (3-5 Ton)
DISCONNECT
MOUNTING (FIELD-SUPPLIED)
LOCATION t /
i
SINGLE P'QIN]
MAIN BRACKET AND BOX
CONTROL CONDUIT MOUNTING
BOX DRIP BOOT SCREW
EMT OR RIGID CONDUIT SINGLE CENTER MANUAL RESET
POINT BOX POST LIMIT SWITCH
HEATER HEATER HEATER
MODULE MODULE MOUNTING
(LOCATION 1) (LOCATION 2) BRACKET
CONTROL WIRE TERMINAL BLOCK
C08134
Fig. 28 - Typical Component Location
Fig. 29 - Typical Module Installation
C08135
17
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