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ELECTRIC HEATERS
The 50LC units may be equipped with factory or field-installed
electric heaters. The heaters are modular in design.
Heater modules are installed in the compartment below the indoor
blower access panel. Access is through the electric heat access
panel. Heater modules slide into the compartment on tracks along
the bottom of the heater opening. See Fig. 59-61. Refer to the
Electric Heater Kit Installation Instructions for complete details on
field-installed electric heat accessory.
CONTROL BOX
ACCESS
PANEL
FILTER AND
INDOOR COIL
ACCESS
PANEL
INDOOR BLOWER
ACCESS PANEL
ELECTRIC HEAT
ACCESS PANEL
Fig. 59 — Typical Access Panel Location
INDOOR BLOWER
ACCESS PANEL
MAIN CONTROL
FILTER
BOX
AREA
Fig. 60 — Typical Component Location
ELECTRIC HEATER
TRACKS
ELECTRIC HEATER
OPENING
Fig. 61 — Electric Heater Compartment
(Cover Removed)
Not all available heater modules may be used in every unit. Use
only those heater modules that are ETL listed for use in a specific
size unit. Refer to the label on the unit cabinet for the list of ap-
proved heaters.
HEATER
MODULE
Low-Voltage Control Connections
Locate the plug assembly in the electric heater section of the main
unit. Connect the plug with the mating low voltage plug located on
the heater. Note that the plug will already be connected when there
is factory-installed electric heat See Fig. 62.
Fig. 62 — Optional or Accessory Electric Heater
Control Connections
HUMIDI-MIZER
SYSTEM CONTROL CONNECTIONS
®
NOTE: It is suggested to ensure the Auto-Changeover function of
an installed thermostat is enabled when used in conjunction with
the Humidi-MiZer Adaptive Dehumidification system.
Humidi-MiZer System Space RH Controller
The Humidi-MiZer dehumidification system requires a field-
supplied and field-installed space relative humidity control de-
vice. This device may be a separate humidistat control (contact
closes on rise in space RH above control setpoint) or a combina-
tion thermostat-humidistat control device with isolated contact
set for dehumidification control. See Fig. 63. The humidistat is
normally used in applications where a temperature control is al-
ready provided (units with RTU Open control), or a ZS series
sensor with humidity sensing. SystemVu™ controls require a
Space Humidistat (HL38MG029), a Wall Mount Space Humidi-
ty Sensor (33ZCSENSRH-01), or a Duct Mount Humidity Sen-
sor (33ZCSENDRH-01).
NOTE: 50LC14-26 units require a 3-stage cooling thermostat de-
vice and are not compatible with Carrier's Edge
Fig. 63 — Accessory Field-Installed Humidistat
42
INTEGRATED
STAGING
CONTROL
(ICS)
BOARD
Pro thermidistat.
®
% RELATIVE HUMIDITY
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