Mitsubishi Electric TRANE NTXAMT12A112AA Manuel D'installation page 42

NOTE
When CN4Y is used the fan is off when CN24 is energized which is only for use with supplemental heat
that is not in the duct.
13.3. Condensate overlow safety switch connection
(CN4F)
The circuit board is equipped with a connection to attach a
CAUTION
condensate safety loat switch. The switch should be a normally
If a heater is installed in the duct, do not use Panel Heater Connector. By doing so, the fan will turn off
closed low voltage rated switch. The switch should be installed in a
when the heater is on, which may result in fire.
location that it can sense a drain blockage causing a rise in water
level. This resulting rise in level will cause it to open. The switch
location is to be determined by the installing contractor. When the • Please see section 13.4. for external static pressure settings.
switch opens, it will cause the LEV to close, stopping the cooling
13.3. Condensate overflow safety switch connection (CN4F)
operation. The fan will continue to run and a fault code will be shown
The circuit board is equipped with a connection to attach a condensate safety float switch. The switch should be a normally
at the controller. Correcting the problem and closing the switch will
closed low voltage rated switch. The switch should be installed in a location that it can sense a drain blockage causing a
rise in water level. This resulting rise in level will cause it to open. The switch location is to be determined by the installing
be required before normal operation can resume.
contractor. When the switch opens, it will cause the LEV to close, stopping the cooling operation. The fan will continue to
See installation below:
run and a fault code will be shown at the controller. Correcting the problem and closing the switch will be required before
normal operation can resume. See installation below:
Locate the CN4F connector on the
control board. Carefully remove the
connector with the jumper from the
board. Cut the jumper on the CN4F
connector and wire a normally
closed safety loat switch across
the wires. Carefully reinstall the
connector back on the board.
When the Normally Closed Float
Switch opens, the Indoor unit will
turn off.
13.4. Changing blower external static pressure
The air handler is equipped with an adjustable static pressure setting. The available settings are shown in the table below.
Specifications are subject to change without notice.
NTXAMT12, 18, 24, 30, 36A112AA
42 © 2018 Mitsubishi Electric Trane HVAC US LLC. All rights reserved.
13.4. Changing
The air handler is
setting. The availa
Model
MVZ-A12
MVZ-A18
MVZ-A24
MVZ-A30
MVZ-A36
*MVZ-A36 in Dow
The air handler w
The air handler's s
function settings in
manual for the con
on the controller u
(PAR-31 & Simple
there are different
downlow position
Vertical, Horizon
Pressure Setting
External Static
Pressure
0.3 in. WG [75Pa