Carrier WeatherExpert 50LC - Unit Without Thru- - Base Connection Kit; Heat Anticipator Settings; Electric Heaters

23
C
G
C
G
O/B/Y2
Y2
R
R
Y1
Y1
Y3
Y3
(Note 1)
(Notes 2, 3 & 4)
(Note 3 & 4)
W1
W1
W2
W2
T
H
E
R
M
O
S
T
A
T
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
Instructions to select Y2.
Note 2: Y2 to Y3 connection required for 2-stage cooling operation and when
integrated economizer function is desired.
Note 3: To Connect a 2-Stage Thermostat:
Y2 to Y3 connection required for 2-stage cooling operation which
provides low and high cooling states.
Note 4: SystemVu
controller is default configured for 3-stage cooling and
2-stage heating thermostats; it can be configured for other thermostat types.
Field Wiring
Integrated Staging Control
(ISC) Board or
SystemVu
TM
Controller
Typical
Thermostat
Connections
a48--- 9346
Fig. 32 -- Low--Voltage Connections
Unit Without Thru--Base Connection Kit —
Pass the therm ostat control wires through t he 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 te rminal strip on the upper--left
corner of the Controls Connect ion Board. See Fig. 33.
NOTE: If thru--the--bottom connections accessory is used,
refer to the accessory installation instructions for
information on routing power and control wiring.
RACEWAY
HOLE IN END PANEL (HIDDEN)
C08027
Fig. 33 -- Field Control Wiring Raceway
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
50LC units may be equipped with factory or
field--installed electric heaters. The heaters are modula r in
design, with heater frames holding open coil resistance
wires strung through ceramic insulators, line--break limit
switches and a control contac tor. One or two heater
modules may be used in a unit.
Heate r modules are installed in the compartment below
the indoor (supply) fan outle t. Access is t hrough the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 34, Fig. 35 and Fig. 36.
Not al l available heater modules may be used in every
unit. Use only t hose heater modules that are UL/ET L
listed for use in a specific size unit. Refer to the label on
the unit cabi net for the list of a pproved 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 heat er model num ber (value i s 0).
DISCONNECT MOUNTIN
N
UNI BLOCK-OFF
ANEL
OUTDOOR
ACCESS PANEL
INDOOR
ACCESS
PANEL
G
LOCATIO
T
P
C13204
Fig. 34 -- Access Panel Locations
DISCONNECT
MOUNTING
LOCATION
EMT OR RIGID CONDUIT
(FIELD-SUPPLIED)
SINGLE
POINT BOX
CENTER
POST
MANUAL RESET
LIMIT SWITCH
HEATER
COVERS
MAIN
CONTROL
BOX
BRACKET AND
CONDUIT
DRIP BOOT
SINGLE POINT
BOX
MOUNTING
SCREW
CONTROL WIRE TERMINAL BLOCK
HEATER
MODULE
(LOCATION 1)
HEATER
MODULE
(LOCATION 2)
HEATER
MOUNTING
BRACKET
C13205
Fig. 35 -- Component Locations