Low-Voltage Control Connections; Humidi-Mizer® Control Connections; Humidi-Mizer - Space Rh Controller - Carrier 50KC04 Installation Instructions Manual

LOW-VOLTAGE CONTROL CONNECTIONS

Pull the low-voltage control leads from the heater module(s) —
VIO and BRN (two of each if two modules are installed; identify
for Module #1) — to the 4-pole terminal board TB4 located on the
heater bulkhead to the left of Heater #1. Connect the VIO lead
from Heater #1 to terminal TB4-1. For 2-stage heating, connect
the VIO lead from Heater #2 to terminal TB4-2. For 1-stage heat-
ing with 2 heater modules connect the VIO lead from both Heater
#1 and #2 to terminal TB4-1. Connect both BRN leads to terminal
TB4-3. See Fig. 38.
CTB
CONTL
BOARD
2
VIO
3
ORN
12
BRN
ORN
1
TB4
VIO
Field
Connections
Fig. 38 — Accessory Electric Heater Control
Connections
Humidi-MiZer Control Connections
®
HUMIDI-MIZER – SPACE RH CONTROLLER
NOTE: The Humidi-MiZer is a factory-installed option. Humidi-
MiZer is not available for size 04-06 single phase (-3 voltage
code) models.
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 combi-
nation thermostat-humidistat control device such as Carrier's
Edge Pro Thermidistat with isolated contact set for dehumidi-
®
fication control. The humidistat is normally used in applica-
tions where a temperature control is already provided (units
with PremierLink control).
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 through the raceway built into the corner post (see
Fig. 33) to the 24-v barrier located on the left side of the con-
trol box. The raceway provides the UL-required clearance
between high-voltage and low-voltage wiring.
VIO BRN
2 3
VIO BRN BRN
Elec Htr
VIO HR2 BRN
VIO HR1 BRN
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
3. Use wire nuts to connect humidistat cable to two PINK leads
in the low-voltage wiring as shown in Fig. 41.
To connect the Thermidistat device (33CS2PPRH-01):
1. Route the Thermidistat multi-conductor thermostat 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. 33) 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. The Thermidistat has dry contacts at terminals D1 and D2
for dehumidification operation (Fig. 42). The dry contacts
must be wired between CTB terminal R and the PINK lead
to the LTLO switch with field-supplied wire nuts. Refer to
the installation instructions included with the Carrier Edge
Thermidistat device for more information.
Fig. 39 — Accessory Field-Installed Humidistat
Fig. 40 — Edge Pro Thermidistat
21
% RELATIVE HUMIDITY
®