Humidi-Mizer System - Space Rh Controller; Rtu Open Controller (Factory-Installed Option); Systemvu Controller (Factory-Installed Option) - Carrier WeatherExpert 48LC 07 Series Installation Instructions Manual

RACEWAY
HOLE IN END PANEL (HIDDEN)
Fig. 44 — Field Control Wiring Raceway
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 installed space relative humidity control device.
This device may be a separate humidistat control (contact clos-
es on rise in space RH above control setpoint) or a combination
thermostat-humidistat control device with isolated contact set
for dehumidification control.
NOTE: Use of a humidistat device is not permitted on 48LC units
equipped with RTU Open control; these units require use of a
field-supplied RH sensor (33ZCSENSRH-02 or 33ZHCSEN-
DRH-02) or a ZS series sensor with humidity sensing. System-
Vu™ controls requires a Space Humidistat (HL38MG029), a Wall
Mount Space Humidity Sensor (33ZCSENSRH-01), or a Duct
Mount Humidity Sensor (33ZCSENDRH-01).
Humidistat
Fig. 46 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring
To connect the Carrier humidistat (HL38MG029) (Fig. 45):
1. Route the humidistat 2-conductor cable (field-supplied)
through the hole provided in the unit corner post.
2. Feed wires through the raceway built into the corner post
(see Fig. 44) to the 24-v barrier located on the left side of
the control box. The raceway provides the UL-required
clearance between high-voltage and low-voltage wiring.
3. Use wire nuts to connect humidistat cable to the leads in
the low-voltage wiring (as shown in Fig. 46), connecting
PNK to PNK and PNK/BLK to PNK/BLK.
Fig. 45 — Accessory Field-Installed Humidistat
NOTE: 48LC**07 units require a 3-stage cooling thermostat de-
vice and are not compatible with Carrier's Edge

RTU Open Controller (Factory-Installed Option)

For details on operating 48LC**07 units equipped with the
factory-installed RTU Open controller option, refer to 48/50LC
07-26 Factory Installed Option RTU Open Multi-Protocol
Controller Controls, Start-up, Operation and Troubleshooting
manual.

SystemVu Controller (Factory-Installed Option)

For details on operating 48LC**07 units equipped with the
factory-installed SystemVu control option, refer to 48/50LC
04-26 Single Package Rooftop Units with SystemVu Controls
Version 2.X Controls, Start-up, Operation and Troubleshooting
manual.
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% RELATIVE HUMIDITY
Pro thermidistat.
®