Mr. Slim MXZ Series Guide Specification ©July 2011 Mitsubishi Electric / HVAC 24/51
1. The indoor unit coil shall be of nonferrous construction with pre-coated aluminum strake
fins on copper tubing.
2. The multi-angled heat exchanger shall have a modified fin shape that reduces air
resistance for a smoother, quieter airflow.
3. All tube joints shall be brazed with PhosCopper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A sloped, corrosion resistant condensate pan with drain shall be provided under the coil.
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. [An optional drain lift mechanism, capable of lifting condensate 23-
5/8”(600mm) above the drain pan, shall be provided]
F. Electrical:
1. The indoor 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 volts
to 253 volts.
3. The system shall be equipped with A-Control – a system allowing each indoor unit to be
powered and controlled directly from the outdoor unit using a 14 gauge (AWG) 3-wire
connection plus ground providing both primary power and integrated, by-directional,
digital control signal without additional connections.
G. Control:
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
outdoor unit. The control signal between the indoor and outdoor unit shall be pulse
signal 24 volts DC. Indoor units shall have the ability to control supplemental heat via
connector CN24 and a 12 VDC output.
2. For A-Control, a three (3) conductor 14 gauge AWG wire with ground shall provide
power feed and bi-directional control transmission between the outdoor and indoor
units. . If code requires a disconnect mounted near the indoor unit, a TAZ-MS303 3-Pole
Disconnect shall be used – all three conductors must be interrupted.
3. The system shall be capable of automatic restart when power is restored after power
interruption. The system shall have self-diagnostics ability, including total hours of
compressor run time. Diagnostics codes for indoor and outdoor units shall be displayed
on the wired controller panel.
4. Remote Controllers
All remote controllers need to be ordered separately from the unit.
a. Wireless, wall mounted remote controller kit (MHK1)
The Wireless, wall mounted remote controller kit (MHK1) shall consist of a wireless,
wall mounted controller (MRCH1), a wireless receiver (MIFH1) and a cable
(MRC1) to connect the receiver to the indoor unit. The controller shall be white in
color with a light-green LCD display and a backlight feature. The MRCH1 shall
consist of four Function buttons below the display, and Increase/Decrease Set
Temperature buttons and a Hold button to the right of the display. The controller
(32 pages)
(24 pages)
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