Starting The Heat Pump System - Thermoscreens Air curtain system Installation, Operation & Maintenance Instructions Manual

Starting the Heat Pump System

Carry out a final inspection to ensure that all wiring is in accordance with Wiring
Diagram 1 on Page 18 or wiring Diagram 2 on Page 19 and that all connections have
been properly made. Ensure that the refrigerant system is complete, there are no leaks
and there is sufficient charge of refrigerant R410A. Switch on electrical power to the
Mitsubishi Electric compressor unit and other City Multi system components. Wait 30
seconds and switch on electrical power to the air curtain at the local isolator.
WARNING! The Interface PCB inside the air curtain will have 230 volts on it and there
will be 400V on some air curtain terminals if the defrost cycle auxiliary heater is
enabled.
The system will 'boot-up' and when the screen on the PAR-30MAA or PAR-F27MEA
Remote Controller becomes active it will repeat the message "PLEASE WAIT". After
several minutes when the PLEASE WAIT message has stopped the system is ready to
start.
DANGER: Beware of Fans Starting!
Turn the air curtain on using the ON/Off Button on the Remote Controller and the air
curtain fans will start straight away. Using the Fan Speed Button on the remote
controller check that the fans run at HIGH speed, MEDIUM speed and LOW speed and
there is no mechanical noise coming from the fans at each of the three fan speeds. If a
door switch has been installed to change fan speeds from High (door open) to Low
(door closed) check this operates correctly. Switch the Mode Button on the remote
controller to 'HEAT' and adjust the target temperature to 28°C maximum setting using
the ▲TEMP Button. Check that the air stream from the discharge grille warms up
across the whole length of the air curtain after approximately 20 minutes of operation
and that the air stream reaches right down across the doorway with the door open or
closed.
If the end user is to operate the air curtain with a Remote Controller it can be set-up to
monitor room air temperature at the controller instead of return air temperature at the air
inlet of the air curtain. If this is required see the Mitsubishi Electric remote controller
instructions for details.
If it is intended that the air curtain is to ever operate in cooling mode* switch the Mode
Button on the remote controller to 'COOL' and adjust the target temperature to 14°C
using the ▼TEMP Button. Wait for the air curtain air stream to go cold. Check there is
no debris in the outlet spout, there are no kinks in condensate hoses and the
condensate pump (if used) will operate. It is unlikely that condensate will fill the drain
tray straight away so it will be necessary to fill the tray manually with water to see if the
condensate removal system is working satisfactorily. If an alarm sensor is fitted in the
drain tray, check it operates to stop the air curtain cooling if the drain tray becomes too
full. Test the air curtain for a time in cooling mode with the hinged recessed grille closed
and if environmental conditions permit check that condensate is being collected and
pumped away by the condensate pump. No condensate should leak out of the air
curtain. At the end of the cooling test open the hinged recessed grille and check that the
inside of the air curtain has remained dry and that all condensate was collected by the
removal system.
For the air curtain to operate in cooling mode there must be a condensate disposal system fitted.
*
To conserve energy and carbon resources it is recommended to set up the Remote
Controller, BMS System or Centralised Controller so it operates in HEAT Mode at a
target temperature of 24°C. This is the normal mode of operation for the heat pump air
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