51
Fig. 84 — Accessory Electric Heater Control
Connections (Size 16)
Humidi-MiZer
®
System Control Connections
HUMIDI-MIZER — SPACE RH CONTROLLER
NOTE: The Humidi-MiZer system is a factory installed option.
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 set point) or a combina-
tion thermostat-humidistat control device such as Carrier’s
Edge
®
Pro Thermidistat with isolated contact set for dehumidi-
fication control (see Fig. 86). The humidistat is normally used
in applications where a temperature control is already provided
(units with PremierLink™ control).
50TC 07-14 UNIT HUMIDI-MIZER
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. 57) 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 two PINK
leads in the low-voltage wiring as shown in Fig. 87 and 88.
To connect the Thermidistat device (33CS2PPRH-01):
1. Route the Thermidistat multi-conductor thermostat cable
(field-supplied) through the hole provided in the unit cor-
ner post.
2. Feed wires through the raceway built into the corner post
(see Fig. 57) 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 (see Fig. 90). The dry con-
tacts 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 Pro Thermidistat device for more information.
50TC 16 UNIT HUMIDI-MIZER
To connect the Carrier humidistat (HL38MG029):
1. Route the humidistat 2-conductor cable (field-supplied)
through the bushing the unit’s louvered end panel (see
Fig. 74).
2. Route the cable through the snap-in wire tie and up to the
web bushing near the control box.
3. Feed the cable through the bushing and into the bottom
left side of the control box after removing one of the two
knockouts in the corner of the box. Use a connector to pro-
tect the cable as it enters the control box.
4. Use the connector and the wire tie to reduce any slack in
the humidistat cable to ensure that it will not be damaged
by contact with the condenser coil (see Fig. 74).
5. Use wire nuts to connect humidistat cable to two PINK
leads in the low-voltage wiring as shown in Fig. 89.
To connect the Thermidistat device (33CS2PPRH-01):
1. Route the Thermidistat multi-conductor thermostat cable
(field-supplied) through the bushing the unit’s louvered
end panel (see Fig. 74).
2. Route the cable through the snap-in wire tie and up to the
web bushing near the control box.
3. Feed the cable through the bushing and into the bottom
left side of the control box after removing one of the two
knockouts in the corner of the box. Use a connector to pro-
tect the cable as it enters the control box.
4. Use the connector and the wire tie to reduce any slack in
the thermostat cable to ensure that it will not be damaged
by contact with the condenser coil (see Fig. 74).
5. The Thermidistat has dry contacts at terminals D1 and D2 for
dehumidification operation (see Fig. 90). 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 Ther-
midistat device literature for more information.
Fig. 85 — Accessory Field-Installed Humidistat
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
2
3
12
13
2
TB4
HR2
HR1
Elec Htr
CONTL
BOARD
CTB
Field
Connections
VIO BRN BRNVIO
VIO BRN
VIO BRN
ORN
BRN
VIO
ORN VIO BRN
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