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Remote 3-Speed Fan Switch
A remote 3-speed fan switch is supplied with the air curtain so the end user can remotely
select High, Medium or Low fan speeds to suit the local
conditions. The 3-Speed Fan Switch should be mounted on a
wall with the Mitsubishi Electric PAR-21MAA Remote Controller,
if used, so the end user will then have On/Off, temperature
control and fan speed control all from one location. The 3-speed
fan switch is wired to terminals FAN, HIGH, MED and LOW in
the Air Curtain using 230v mains rated, 4 core double insulated
cable of size 0.75mm
2
.
If the remote 3-Speed fan switch is not to be used, a permanent
wire link must be fitted across the fan terminals in the air curtain or
the fans will not operate when the system is started. This will
result in an error message from the compressor unit after a time.
The picture opposite shows a wire link fitted across terminals FAN
and MED and the air curtain would operate at Medium Fan Speed
whenever the heat pump system is switched on.
Note:
Fan speed selection using the PAR-21MAA Remote Controller is not available. The
fan speed control logic within the PAC-AH…AHU Controller is not suitable for the
operation of an air curtain and so is not used.
The finished wiring to the air
curtain will be as shown in the
pictures opposite (wiring is
shown with a 3-phase electrical
supply for enabled defrost
heaters).
Note the use of 20mm conduit
with thermistor sensors and low
voltage cables in a separate
conduit to the mains rated
cables.
PAR-21MAA Remote Controller
If the air curtain is to be manually controlled by the end user a
Mitsubishi Electric PAR-21MAA remote controller (not supplied by
Thermoscreens) must be supplied and fitted by the installer. This is
wired to the PAC-AH…AHU Controller using 2-core cable. Refer to
the Mitsubishi Electric instructions that come with the PAR-21MAA
remote controller for installation and wiring of the controller.
A PAR-21MAA Remote Controller is also required for commissioning
purposes and if using AUTO mode with a BMS System or Centralised Controller.
M-NET Communications Cable
The M-NET communications cable is wired to the PAC-AH…AHU Controller in accordance
with Mitsubishi Electric instructions. Avoid isolators in the communications cables as this
can lead to transmission problems.
Sensors and
low voltage
cables
230v rated
cables
