Mr. Slim MXZ Series Guide Specification ©July 2011 Mitsubishi Electric / HVAC 29/51
4.05. Ceiling Recessed SLZ-KA**NA Indoor Units.
A. General:
The SLZ shall be a four-way cassette style indoor unit that recesses into the ceiling with a
ceiling grille. The indoor unit shall be factory assembled, wired and run tested. Contained
within the unit shall be all factory wiring, piping, electronic modulating linear expansion
device, control circuit board and fan motor. The unit shall have a self-diagnostic function,
3-minute time delay mechanism, an auto restart function, an emergency operation function
and a test run switch. Indoor unit and refrigerant pipes shall be charged with dehydrated
air before shipment from the factory.
B. Unit Cabinet:
1. The cabinet shall be a compact 22-7/16” wide x 22-7/16” deep so it will fit within a
standard 24” square suspended ceiling grid.
2. The cabinet panel shall have provisions for a field installed filtered outside air intake.
3. Four-way grille shall be fixed to bottom of cabinet allowing two, three or four-way blow.
C. Fan:
1. The indoor fan shall be an assembly with a turbo fan direct driven by a single motor.
2. The indoor fan shall be statically and dynamically balanced to run on a motor with
permanently lubricated bearings.
3. The indoor fan shall consist of three (3) speeds, Low, Mid, and High.
4. The indoor unit shall have an adjustable air outlet system offering 4-way airflow, 3-way
airflow, or 2-way airflow.
5. The auto air swing vanes shall be capable of automatically swinging up and down for
uniform air distribution.
D. Filter:
1. Return air shall be filtered by means of a long-life washable filter.
E. Coil:
1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper
tubing.
2. The tubing shall have inner grooves for high efficiency heat exchange.
3. All tube joints shall be brazed with phos-copper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A condensate pan and drain shall be provided under the coil.
6. The unit shall include a condensate lift mechanism that will be able to raise drain water
19-3/4” inches above the condensate pan.
7. An optional drain pan level switch (DPLS1), designed to connect to the control board,
shall be provided if required, and installed on the condensate pan to prevent condensate
from overflowing.
8. Both refrigerant lines to the SLZ indoor units shall be insulated.
F. Electrical:
1. The unit electrical power shall be 208/230 volts, 1-phase, 60 hertz.
2. The system shall be capable of satisfactory operation within voltage limits of 187-228
volts (208V/60Hz) or 207-253 volts (230V/60Hz).
G. Controls:
1. The control system shall consist of a minimum of one microprocessor on each indoor
unit and one on the outdoor unit, interconnected by single non-polar two-wire cables.
The microprocessor located in the indoor unit shall have the capability of monitoring
return air temperature and indoor coil temperature, receiving and processing commands
from a wireless or wired controller, providing emergency operation and controlling the
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