25
Humidi--MiZer
R
System Control Connections
NOTE: It is suggested to ensure the Auto--Changeover
function of an instal led thermostat is enabled when used
in conjunction with the Humidi--MiZer Adaptive
Dehumidification system.
Humidi--MiZer System – Space RH Controller —
The H umid i--MiZer dehumidificatio n sys tem requir es a
field--su p plied and installed sp ace relative humidity contr ol
device. This device may be a separate humidistat control
(contact closes on rise in s pace 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
50LC units equipped with RTU Open control; the se units
require use of a field--supplied RH sensor
(33ZCSENSRH--02 or 33ZHCSENDRH--02), or a ZS
series sensor with humidity sensing. SystemV ut controls
requires a Space Humidistat (HL38MG029) or a Wall
Mount Space Humidity Sensor (33ZCSENSRH--01) or a
Duct Mount Humidity Sensor (33ZCSENDRH--01).
To connect the Carrier humidistat (HL38MG029):
1. Route the humidistat 2--conductor cable (field--supplied)
through the hole provided in the unit corner post.
2. Feed wires t hrough the raceway built into the corner
post (see Fig. 33) to the 24--v barrier locat ed on the
left side of the c ontrol 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 t he low–voltage wiring (as shown in Fig. 40), con-
necting PNK to PNK and PNK/BLK to PNK/BLK.
% RELATIVE HUMIDITY
C09295
Fig. 39 -- Accessory Field--Installed Humidistat
NOTE: 50LC**07 units require a 3--stage cooling
thermostat device and are not compatible with Carrier ’s
Edge
R
Pro thermidistat.
RTU Open Controller (Factory--Installed Op tion)
For details on operati ng 50LC**07 units equipped with
the factory--installed RTU Open controller option refer to
48/50LC 07--26 Factory Install ed Opti on RTU Open
Multi--Protocol Controller Controls, Start--up, Operation
and Trouble shooting manual.
SystemVut Controller (Factory--Installed Option)
For details on operati ng 50LC**07 units equipped with
the factory--installed SystemVu control option refer to
48/50LC 04--26 Single Package Roof top Units with
SystemVu Controls Version 2.X Controls, Start--up,
Operation and Troubleshooting manual.
Humidistat
a48--- 9329
Fig. 40 -- Typical Humidi--MiZer Adaptive Dehumidification System Humidistat Wiring
618
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