Carrier 33MC-URC User Manual

33MC--URC

Room Controller

40KMC

40KMQ

40QNC

40QNQ

INSTALLATION MANUAL

This control system only operates with indoor units of the following types:
40KMC, 40KMQ Cassette, 40QNC, 40QNQ High Wall

For insta lla tio n instructions o f th is u n it, refer to the releva n t manuals.

CONTENTS PAGE

General information 2...............................................................................

Characteristics 2.....................................................................................

Choosing the installation site 2........................................................................

“Room Controller” wired control 3....................................................................

Electrical connections to indoor unit 4.................................................................

Unit configuration 4, 6...............................................................................

Troubleshooting 6...................................................................................

INSTALL AT I O N FL O W CHART

Read manual

Install

Room Controller

33MC--URC

Dimensions (mm)

Wire Room Cont roller

and unit networ k

Configure

Room Controller

Test System

Operate

Room Controller

4--1/4”(108)

3/4”(20)

2--3/14”(70)

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes and
National Electrical Code (NEC) for special requirements.

Recognize safety information. This is the safety--alert symbol
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING sign ifies hazard s wh ich co u ld result in
personal injury or death. CAUTION is u sed to identify unsafe
practices which would result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.

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ormation andcharacteristics

IMPORTANT: Read the entire instruction manual before
starting the installation.

S For trouble--free installation, which should be carried out

by a qualified installer, follow the installation chart
sequence.

S Follow all current national safety code requirements. In

particular ensure that a properly sized and connected
ground wire is in place.

S After installation, thoroughly test the system operation

and explain all system functions to the owner.

S Leave this manual with the owner for consultation

during future periodic maintenance.

S Dispose of packaging material in accordance with local

requirements.

S The manufacturer denies any responsibility and warranty

shall be void if these installation instructions are not
observed.

S Inspect equipment. For damage due to improper

transportation or handling, file an immediate claim with
the shipping company. Do not install or use damaged
units.

S In case of any malfunction, turn the unit off, disconnect

the main power supply and contact a qualified service
engineer.

WIRING

The Room Controller will be capable of controlling from 1 to 6
Fan Coil Units.

The total run length of the wire connecting the Room Controller to
the FCUs should be kept to under 500 feet (150 m.).

Only daisy chain wiring will be allowed (See Figure 1).

oosing theinsta

on site an

The Room Controller will connect to the receiver board connection
on the electronic board inside the unit.

REMOTE

FCU 1

FCU 2

FCU 3

FCU 6

Fig. 9 – Daisy Chain Wiring (Multidrop)

POWER

The thermostat will be powered by unregulated 12.5 volts DC
nominal (10V min. to 20V max) which is provided by the
electronic board inside the unit.

The power consumption will be 50mA 12.5 volts DC.
For applications where more than one FCU is to be controlled, the

FCU closest to the Room Controller will be the only one that
supplies power to the Room Controller.

The control should be protected from damage if accidental
miswiring of power, ground and signal.

nsta

on

33MC--URC

Room Controller Location

The Room Controller can be located anywhere. However, if the
installation requires the system in the location to use the air sensor
on the Room Controller; then, the controller should be mounted:

S Approximately 5 ft. (1.5 m) from floor.

Fig. 10 – Minimum Clearances

S In the same area where the unit is located, preferably on

an inside partitioning wall.

S On a section of wall without pipes or duct work.

If the air sensor on the Room Controller has been selected, it
should NOT be mounted:

S Close to a window, on an outside wall, or next to a door

leading to the outside.

S Exposed to direct light and heat from a lamp, sun,

fireplace, or other temperature--radiating object which
may cause a false reading.

S Close to or in direct airflow of a heating or cooling

supply.

S In areas with poor air circulation, such as behind a door

or in an alcove.

Maximum of 500 ft. (150 m) of total network wiring.

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