Carrier WeatherMaker 48TC A/B07 Series, Installation Instructions Manual

Page: 38 / 60

38
HUMIDI-MIZER
®
CONTROL CONNECTIONS
Humidi-MiZer – Space RH Controller
NOTE: The Humidi-MiZer is a factory installed option.
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 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. 67 and 68). The humidistat is normally
used in applications where a temperature control is already pro -
vided (units with PremierLink™ control).
To Connect the Carrier Humidistat (HL38MG029) for
Sizes 07-14:
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. 63) 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. 69.
To Connect the Carrier Humidistat (HL38MG029) for
Sizes 16:
1. Route the humidistat 2-conductor cable (field-supplied)
through the bushing the unit’s louvered end panel.
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.
5. Use wire nuts to connect humidistat cable to two PINK
leads in the low-voltage wiring as shown in Fig. 70.
To connect the Thermidistat device (33CS2PPRH-01) for
Size 07-14:
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. 63) 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. 71). 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 Car -
rier Edge Thermidistat device for more information.
To connect the Thermidistat device (33CS2PPRH-01) for
Size 16:
1. Route the Thermidistat multi-conductor thermostat cable
(field-supplied) through the bushing the unit’s louvered
end panel.
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.
5. The Thermidistat has dry contacts at terminals D1 and D2
for dehumidification operation (see Fig. 71). 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 Car -
rier Edge Thermidistat device for more information.
Fig. 67 — Accessory Field-Installed Humidistat
Fig. 68 — Edge
®
Pro Thermidistat
Low Ambient Control (Factory Option)
If the unit comes with Electro-Mechanical (EM) control, then no
adjustment is necessary. If the unit comes with PremierLink
™
or
RTU Open control option, then refer to its installation control
manual for details on adjusting “Cooling Lock-Out” setting and
configure for your specific job requirements.
% RELATIVE HUMIDITY
®