Carrier 48TC Instruction Manual download pdf (Page 18)

Humidi--MiZer

Control Connections

Humidi--MiZer – Space RH Controller —

NOTE: The Humidi--MiZer is a factory installed option

which is only available for units equipped with belt--drive

motors. Humidi--MiZer is not available for single phase

(--3 voltage code) models.

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 closes on rise in space RH above control

setpoint) or a combination thermostat--humidistat control

device such as Carrier’s EDGE

Pro Thermidistat with

isolated contact set for dehumidification control. The

humidistat is normally used in applications where a

temperature control is already provided (units with

PremierLinkt control).

To connect the Carrier humidistat (HL38MG029):

1. Route the humidistat 2--conductor cable (field--sup-

plied) through the hole provided in the unit corner

post.

2. Feed wires through the raceway built into the corner

post (see Fig. 29) 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. 32.

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. 29) 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. 33).

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 (Form 33CS--65SI or latest) for

more information.

% RELATIVE HUMIDITY

C09295

Fig. 30 -- Accessory Field--Installed Humidistat

C09296

Fig. 31 -- EDGE Pro Thermidistat

48TC

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Carrier 48TC Instruction Manual Page 18

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