Mitsubishi Electric PAR-30MAA Installation Manual download pdf (Page 6)

T9901085-1-3 UK Page 6 of 38

The air curtain can also be set up on site during commissioning to operate under Inlet Air

Temperature Control or Room Air Temperature Control and is then used with a

Mitsubishi Electric PAR-30 MAA Remote Controller. The following functions are available:-

 On/Off control of the Mitsubishi Electric heat pump system

 Mode change between Heating mode and Fan only mode, with Cooling mode also

available if enabled during commissioning and with a condensate disposal system

 Capacity control of the Mitsubishi Electric heat pump system

 Temperature monitoring of the inlet air entering the heat pump air curtain, or the room

air temperature at the remote controller

 Signal for when the outdoor unit is in defrost mode so the defrost cycle auxiliary heater

(if enabled) can provide partial heat back-up during the few minutes of defrost.

 Error signal for if the Mitsubishi Electric heat pump system has a problem

Refer to a Mitsubishi Electric agent if the air curtain is to be controlled via a Building

Management System (BMS) or Centralised Controller.

It should be noted that during heating mode, if the outdoor unit goes into its defrost cycle

during cold weather, the air curtain fans will continue to operate to maintain the all-

important air stream across the doorway. It is this air stream, particularly towards the top of

the doorway, which is so effective at stopping buoyant warm air from inside the building

escaping to outside and wasting energy and also in reducing airborne contamination.

The temperature of the discharge air can be low during the 6 to 7 minute defrost cycle

period that may occur every few hours under particular outdoor weather conditions but this

has rarely become an issue with the end user and is really only a perceived problem.

There is a defrost cycle auxiliary heater fitted in the air curtain which is disabled when the

air curtain is delivered. If there are concerns for a particular installation this defrost cycle

auxiliary heater can be enabled during site commissioning and this will maintain the

discharge air at a higher temperature during the defrost cycle. A 3-phase electrical supply

is then required to power the air curtain.

Point of Information: If used, an auxiliary defrost heater may seem counter-productive for

a heat pump system. When put into context, however, the auxiliary heater fitted is of low

output for the size of the air curtain, it will just temper the discharge air and is only used for

a few minutes a day during a small period of the year. Tests at the Building Research

Establishment (BRE) test house on the heat pump air curtain system showed that even

with the auxiliary heater cutting in during defrost, as it has to during their EN14511

performance test, the annual seasonal COP was hardly affected.

Cooling is possible if the air curtain is modified during commissioning to operate under

Inlet Air Temperature Control or Room Air Temperature Control. It will not operate in

cooling if set-up to operate under Weather Compensation Control or Discharge Air

Temperature Control, which is how the air curtain is supplied.

The air curtain is supplied with its cooling mode disabled, although an integral condensate

drain tray is fitted inside the air curtain so it could be used in cooling mode during warm

weather, if so desired. This should be decided at the design stage as a condensate drain

system will need to be installed if cooling is required and extended to a suitable drain by

the installer. The condensate can be drained by gravity by connecting suitable condensate

hose onto the 15mm drain pipe on the condensate drain tray inside the air curtain. If a

gravity condensate drain is not visually suitable it will be necessary to remove condensate

using a condensate pump, supplied and fitted by the installer. The condensate pump can

1 2 3 4 5 6 7 8 9 10 11 ... 37 38

Comments to this Manuals

No comments

Mitsubishi Electric PAR-30MAA Installation Manual Page 6

Comments to this Manuals

Related products and manuals for Remote controls Mitsubishi Electric PAR-30MAA