Carrier 40MBDQ183, 40MBDQ243 Specifications

40MBDQ
Ducted Style Ductless System
Sizes 18 to 48

Product Data

NOTE: Images for illustration purposes only. Actual models may
be slightly different.

INDUSTRY LEADING FEATURES / BENEFITS

A PERFECT BALANCE BETWEEN
BUDGET LIMITS, ENERGY SAVINGS AND
COMFORT.

The 40MBDQ series ducted style ductless systems are a matched
combination of an outdoor condensing unit and an indoor fan coil
unit connected only by refrigerant tubing and wires.

The fan coil is mounted in the ceiling. This selection of fan coils
permits creative solutions to design problems such as:

S Add−ons to current space (an office or family room

addition)

S Special space requirements
S When changes in the load cannot be handled by the

existing system.

S Historical renovations or any application where

preserving the look of the original structure is essential.

These compact indoor fan coil units take up very little space above
the ceiling. Advanced system components incorporate innovative
technology to provide reliable cooling performance at low sound
levels.

LOW SOUND LEVELS

When noise is a concern, the ductless split systems are the answer.
The indoor units are whisper quiet. There are no compressors
indoors, either in the conditioned space or directly over it, and
there is none of the noise usually generated by air being forced
through ductwork.

SECURE OPERATION

If security is an issue, outdoor and indoor units are connected only
by refrigerant piping and wiring to prevent intruders from
crawling through ductwork. In addition, since outdoor units can
be installed close to an outside wall, coils are protected from
vandals and severe weather.

FAST INSTALLATION

This compact ductless system is simple to install. A mounting
bracket and duct work is needed for the indoor units, and only
wire and piping need run between the indoor and outdoor units.
These units are fast and easy to install ensuring minimal
disruption to customers in the home or workplace. This makes the
ducted style ductless systems the equipment of choice, especially
in retrofit situations.

BUILT−IN RELIABILITY

Ducted style ductless system indoor and outdoor units are designed
to provide years of trouble−free operation.

The ducted indoor units include protection against freeze−up and
high evaporator temperatures on heat pumps.

The condensing units on heat pumps are protected by a three
minute time delay before the compressor starts the over−current
protection and the high temperature protection.

INDIVIDUAL ROOM COMFORT

Maximum comfort is provided because each space can be
controlled individually based on usage pattern. The air sweep
feature provided permits optimal room air mixing to eliminate hot
and cold spots for occupant comfort. In addition, year−round
comfort can be provided with heat pumps.

ECONOMICAL OPERATION

The ducted style ductless system design allows individual or
multi−room heating or cooling when required. There is no need to
run large supply−air fans or chilled water pumps to handle a few
spaces with unique load patterns.

SIMPLE SERVICING AND M A INTENANCE

Removing the top panel on outdoor units provides immediate
access to the control compartment, providing a service technician
access to check unit operation. In addition, the draw−thru design of
the outdoor section means that dirt accumulates on the outside
surface of the coil. Coils can be cleaned quickly from the inside
using a pressure hose and detergent.

On all indoor units, service and maintenance expense is reduced
due to easy accessible service panels. In addition, these ducted
systems have extensive self−diagnostics to assist in
troubleshooting.

EASY−TO−USE CONTROLS

The ducted units have microprocessor−based controls to provide
the ultimate in comfort and efficiency. The user friendly wired and
wireless remote control provides the interface between user and
the unit.

BUILT−IN CONDENSATE LIFT PUMP

Factory installed condensate lift pump on the ducted fan coil
provides installation flexibility.

OPTIONAL WIRED CONTROLLER

Timer Function

STANDARD WIRED CONTROLLER

7 Day Programmable

AGENCY LISTINGS

All systems are listed with AHRI (Air Conditioning, Heating &
Refrigeration Institute), and ETL.

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MODEL NUMBER NOMENCLATURE

INDOOR UNIT

QD-

40 = FAN COIL UNIT

MB = MODEL

INDOOR FAN COIL TYPE
D = DUCTED STYLE

40 MB 309

- -

VOLTAGE
3 = 208/230-1-60

SYSTEM TYPE
Q = HEAT PUMP

NOMINAL CAPACITY

18 - 1-1/2 TONS
24 - 2 TONS
36 - 3 TONS
48 - 4 TONS

Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.

NOT USED

NOT USED

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STANDARD FEATURES AND ACCESSORIES

Ease Of Installation

Mounting Brackets S
Low Voltage Controls S

Comfort Features

Rear or Bottom Return S

Microprocessor Controls S
Wired Remote Control (7 Day Programmable

KSACN0501AAA
Wireless Remote Control S
Auto Restart Function S
Cold Blow Protection On Heat Pumps S
Freeze Protection Mode On Heat Pumps S
Turbo Mode S
Auto Changeover On Heat Pumps S

Follow Me (Sense Temperature at remote) S

Energy Saving Features

Outside Air Intake S

Sleep Mode S
Stop/Start Timer S

46°F Heating Mode (Heating Setback)

Safety And Reliability

Indoor Coil Freeze Protection S
Indoor Coil High Temp Protection in Heating Mode S
Aluminum Blue Hydrophilic pre-coated fins S

Ease Of Service And Maintenance

Cleanable Filters S
Diagnostics S
Liquid Line Pressure Taps S

Application Flexibility

Built-in Condensate Lift Pump S

Legend

S Standard
A Accessory

S

S

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