Fan Speed - Trane MCD/MWD-512 Installation & Operation Manual

Fan speed

Refer to the selection data to select
the static pressure according to the
flow rate. From this it is possible to
deduce a fan rotation speed. Once
you have chosen the speed, refer to
the interconnection diagram to
connect the room thermostat to the
unit electric cabinet in order to
power the correct selected speed.
Configuration and
operation
The unit is equipped with a control
board that manages operation of the
split system. It is fitted with 4
switches, SW1-1 to SW1-4.
Before start-up by a
qualified technician
Once the system has been installed,
it is recommend to carry out the
following checks.
1. Make sure no tools or debris
have been left inside, around or
on top of the unit.
2. Unit is perfectly level in both
directions.
3. Check the electrical connections
have been correctly done. Check
the electric power supply
corresponds to the units'
nameplates.
4. Make sure the disconnect
switches have been disengaged.
5. Check the refrigerant lines are
fixed securely.
6. Check if the condensate drain
pan is correctly installed.
7. Check the piping connections
and the water-tightness of the
connectors using an appropriate
leak detection method. Check
the connections on the site have
been tightened.
8. Make sure the gas piping and
the condensate drainage tube
are insulated properly to prevent
problems with trickling of
condensation water.
SS-SVX07B-E4
Operation
9. Check the fan turns freely.
10. Make sure the intake and
discharge ducts are not blocked.
11. Check the filters are correctly
positioned. Show the user how
to change the filters.
12. Power up the system and
observe operation carefully:
make any necessary
adjustments.
13. Explain to the user how to
operate the unit.
Unit display and
emergency switch
operation
Four lamps on the unit display show
operating status. In case of loss of
the remote control unit, the system
can be operated temporarily by the
emergency switch. The emergency
switch changes the system mode of
operation by cycling through the
following modes:
FAN COOL HEAT
OFF .
COOL, HEAT and AUTO operation
are at fixed setting of 24°C. Fan
speed is controlled by the AUTO
mode. FAN only operation is at
HIGH fan speed.
Figure 11 - Unit display
1 = Remote control receiver - this picks up the
infrared signals from the wireless controller
2 = Fan lamp- lit when the fan is operating
3 = Cooling lamp - lit when the unit is
operating in COOL mode (or COMP ON in
AUTO mode)
4 = Heating lamp - lit when the unit is
operating in HEAT mode (or heater ON in
the HEAT mode of AUTO mode)
5 = Timer lamp - lit when the system is being
controlled by the timer
6 = Emergency switch
Wired controller operation
Figure 12 - Wired controller
1 = Press to turn on or off the unit, passing
through the different modes: OFF à COOL à
HEAT.
2 = Press TEMP + to increase the setting
temperature. Press TEMP - to decrease the
setting temperature. The setting
temperature will blink for 4 seconds, then
the current room temperature will display.
3 = Press to select the required fan speed. The
speed will be shown by LED indicators:
AUTO HIGH
AUTO
AUTO
HEAT
HIGH
MED COOL
LOW
POWER FAN
TEMP-
TEMP+
MEDIUM LOW
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