Thermoscreens Air curtain system Installation, Operation & Maintenance Instructions Manual

T9901078-1 UK Page 1 of 36

VRF HP RECESSED HEAT PUMP RANGE AIR CURTAINS

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

For use with City Multi (VRF) systems

PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTI NG INSTALLATION

Thermoscreens Ltd

St. Mary’s Road Nuneaton

Warwickshire England

CV11 5AU

Email: [e-mail]

Tel: [phone]
Fax: [phone]

www.thermoscreens.com

English

T9901078-1 UK Page 2 of 36

Thermoscreens / Mitsubishi Electric

City Multi (VRF) HP Recessed

Heat Pump Air Curtain System

CONTENTS

Page

Air Curtain System Schematics 3
Design Information 5
Unpacking the Air Curtain 8

INSTALLATION

Installation of the Air Curtain 10
Figure 1 – Dimensions of VRF HP R Air Curtain 12
Fitting the Recessed Grille 13
Mitsubishi Electric Compressor Unit 14
Refrigerant Pipework 14
To gain access inside the Air Curtain 15
Electrical Supply and Wiring to the Air Curtain 16
Wiring Diagram 1 (Defrost Cycle Auxiliary Heater disabled - as supplied) 18
Wiring Diagram 2 (Defrost Cycle Auxiliary Heater enabled on site) 19
PAR-30MAA Remote Controller 20
Wiring of Air Curtain Fan Speed 20
Condensate Disposal System 20

COMMISSIONING

Air Curtain Checks 22
Selecting the Fan Speeds of the Air Curtain 24
Starting the Heat Pump System 26
Filter Dirty Indicator 27
Hand-over to End-User 29

USER INSTRUCTIONS

User Instructions for the Air Curtain 30

SERVICING

Fortnightly Cleaning 31
Six Monthly Servicing 31
Fault Finding 34

T9901078-1 UK Page 3 of 36

Thermoscreens / Mitsubishi Electric

Thermoscreens HP City Multi (VRF) Heat Pump Air Curtains can be used with Mitsubishi
Electric City Multi Y/WY-Series (Heat Pump) or City Multi R2/WR2-Series (Heat Recovery)
systems.

City Multi Y/WY-Series Heat Pump Air Curtain System

City Multi Y/WY-Series Heat Pump Air Curtain Schematic :-

City Multi Y-Series System:­ Indoor Units and Air Curtains(s) all operate on heating at the same time, or all operate on

cooling at the same time.

The City Multi Y Series Heat Pump Air Curtain system consists of :-

 one or more Thermoscreens VRF HP Heat Pump (heating and cooling) Air Curtains *
 one or more Mitsubishi Electric City Multi Y/WY-Series Compressor Units +
 a Mitsubishi Electric PAR-30MAA or PAR-F27MEA Remote Controller +
 a door switch to change fan speeds; higher speed when the door is open, lower speed

when the door is closed (optional)

^

 Mitsubishi Electric Indoor Unit(s)

+

[NB. Can be used on a full air curtain basis if required

up to 100% diversity]

* - supplied by Thermoscreens Ltd.

+

- Mitsubishi Electric items supplied by the installer

^

- supplied by the installer

Heat Pump

Air Curtain

Mitsubishi Electric

VRF Compressor Unit

M-Net Comms Link from
Compressor Unit

Permanent electrical supply

(from local switched spur)

Mitsubishi Electric

Mitsubishi Electric

PAR-30MAA

or PAR-F27MEA

Remote Controller

BMS

Control

On/Off
Mode change
Capacity control
3-Speed fan control
Temp. monitoring
Mitsubishi error

Refrigeration pipework
Electrical cables

Control cables
BMS Control

Door Switch to change fan speeds
Door open - High; Door shut - Low

(optional)

Permanent electrical supply (from local switched spur)
1-phase for air curtain as supplied,
3-phase only if defrost cycle auxiliary heater is needed
(site change then required to air curtain)

T9901078-1 UK Page 4 of 36

City Multi R2/WR2-Series Heat Pump Air Curtain System

City Multi R2/WR2-Series Heat Recovery Heat Pump Air Curtain Schematic :-

City Multi R2/WR2-Series System:­ Indoor Units and Air Curtains(s) can operate on heating or cooling simultaneously, e.g.

some indoor units are cooling whilst other indoor units and air curtain are heating at the
same time.

The City Multi R2/WR2-Series heat recovery system with Heat Pump Air Curtain(s) consists
of :-

 one or more Thermoscreens VRF HP Heat Pump (heating and cooling) Air Curtains *
 one or more Mitsubishi Electric City Multi R2/WR2-Series Compressor Units

+

 Mitsubishi Electric BC Controller

+

 a Mitsubishi Electric PAR-30MAA or PAR-F27MEA Remote Controller

+

 a door switch to change fan speeds; higher speed when the door is open, lower speed

when the door is closed (optional)

^

 Mitsubishi Electric Indoor Unit(s) + [NB. Can be used on a full air curtain basis if required

up to 100% diversity]

* - supplied by Thermoscreens Ltd.

+

- Mitsubishi Electric items supplied by the installer

^

- supplied by the installer

Permanent electrical supply (from local switched spur)
1-phase for air curtain as supplied,
3-phase only if defrost cycle auxiliary heater is needed
(site change then required to air curtain)

Heat Pump

Air Curtain

Mitsubishi Electric

VRF Compressor Unit

M-Net Comms
Link

Permanent electrical supply

(from local switched spur)

Mitsubishi Electric

BC Controller

BMS

Control

On/Off
Mode change
Capacity control
3-Speed fan control
Temp. monitoring
Mitsubishi error

Refrigeration pipework
Electrical cables

Control cables
BMS Control

Door Switch to change fan speeds
Door open - High; Door shut - Low

Mitsubishi Electric

PAR-30MAA

or PAR-F27MEA

Remote Controller

(optional)

T9901078-1 UK Page 5 of 36

DESIGN INFORMATION

AS SUPPLIED the air curtain operates on a 1 phase electrical supply (1L+N+E) from a local

switched spur which provides power for fans and controls. There is an integral defrost
cycle auxiliary heater located inside the air curtain but this is ‘disabled’ as supplied. If the
defrost cycle auxiliary heater is required the air curtain will then need a 3 phase electrical
supply (3L+N+E) from a local switched spur, instead of the 1 phase electrical supply, to
provide power for the heater as well which will need to be ‘enabled’ on site during
commissioning, see also notes on Page 6 and Section 'Installation - Electrical Supply and
Wiring to the Air Curtain', Page 16.
Electrical power to the Mitsubishi Electric Compressor Unit(s) and BC Controller is fed
separately in the normal way (see separate Mitsubishi Electric Instructions).

There is a Mitsubishi Electric M-Net communications link between the Mitsubishi Electric
Compressor Unit or BC Controller and the Thermoscreens Heat Pump Air Curtain. When
used with a Mitsubishi PAR-30MAA or PAR-27MEA Remote Controller this link provides:-

 On/Off control of the Mitsubishi Electric heat pump system
 Mode change between heating, fan only and cooling of the Mitsubishi Electric heat

pump system

 Capacity control of the Mitsubishi Electric heat pump system
 3-speed control of the Thermoscreens air curtain fans*
 Temperature monitoring of the inlet air entering the air curtain, or the room air

temperature at the remote controller

 Signal for when the outdoor unit is in defrost mode so a 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 system has a problem

* As an alternative a door switch can be used to switch between a higher fan speed with

the door open or a lower fan speed with the door closed.

The air curtain can be set to operate in HEAT, FAN or COOL mode within the Mitsubishi
Electric City Multi VRF system using a Mitsubishi PAR-30MAA or PAR-27MEA Remote
Controller or a Mitsubishi Electric BMS or Centralised Controller.

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 compressor unit goes into its defrost
cycle during cold weather, the air curtain fans will continue to operate to maintain the all­important 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.

For Y-Series systems the temperature of the discharge air can be low during the 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 Y-Series 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.

T9901078-1 UK Page 6 of 36

NB. The defrost cycle auxiliary heater should not be site enabled during commissioning on

R2, WY and WR2 systems. On R2 systems the LEV in the air curtain closes during system
defrost and defrost does not occur on WY and WR2 systems.

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.

The air curtain is supplied with an integral condensate drain tray fitted inside the unit 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 within the ceiling void 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 suitable it will be necessary to remove condensate using a condensate pump,
supplied and fitted by the installer. The condensate pump can be located inside the right
hand end of the air curtain or in a remote location outside of the unit if required. It must be
of sufficient capacity, see Page 21, self priming and capable of providing the appropriate
suction head so the pump will lift condensate out of the air curtain, particularly if it is in a
remote location. There are two hole penetrations at the right hand end of the air curtain for
condensate pipework to pass through, see Figure 1, Page 12. Suitable condensate pumps
are Peristaltic or Rotary Diaphragm type. We recommend the Blue Diamond rotary
diaphragm type with cooling signal sensor (drainStik) manufactured by Charles Austen
Pumps Ltd. (www.miniblue.co.uk).

If using a condensate pump it is recommended that it has the facility so it only operates
when the air curtain is in cooling mode by detection of water in the drain tray or by
detecting a cooling differential in the airflow. It should also have a pump overrun feature to
empty the drain tray as much as possible when the air curtain is switched off. It should
have an alarm system with appropriate sensor fitted in the drain tray that will give a volt­free signal (open circuit = alarm) and stop the air curtain cooling if the condensate drain
tray is in danger of flooding (air curtain fans will continue to operate). Other indoor units on
the same City Multi system are unaffected if the air curtain condensate alarm occurs.
There is a fixing bracket with 8mm diameter hole attached to the drain tray inside the air
curtain so a condensate sensor can be fixed in the tray by the installer. The hole can be
enlarged, if necessary, to suit the type of sensor used so it is located in the tray at the
appropriate position, see the manufacturer’s instructions that come with the condensate
pump for further information. A 230V AC, single phase electrical supply is provided inside
the air curtain to power a condensate pump and a condensate alarm connection is
provided for the condensate pump alarm circuit.

Warning: The air curtain condensate collection system is designed to remove condensate

with the air curtain operating in cooling mode during normal summer weather conditions in
countries with a temperate climate. In case of extreme weather conditions, drain tray
blockage or condensate pump failure, which can occur, it is vital that the design of the floor
beneath the air curtain and its surface is such that it will not become slippery or damaged if
it became wet. This is similar to the conditions that might be experienced with heavy

T9901078-1 UK Page 7 of 36

rainfall in at an open doorway or wet pedestrian foot traffic, so careful consideration must
be paid to the design of the floor and its surface finish.

If it is intended that the air curtain should not operate in cooling mode and a condensate
drain system is not fitted, the BMS System, Centralised Controller or PAR-30 MAA / PAR­27 MEA Remote Controller must be configured at commissioning so that COOL or AUTO
mode can never be selected (see Section – Commissioning, Page 22). It is still
recommended, however, that the floor design and surface be as described above, in case
cooling mode is used in the future and also to cope with heavy rainfall or wet pedestrian
foot traffic.

Note: It could still be possible for an end user to unlock a PAR-30 MAA / PAR-27 MEA

remote controller if they found out how to and switch it into cooling, not realising that
condensate would then flood out of the drain tray. It may be considered prudent, therefore,
to install a condensate drain system even if it is intended that the unit should only be used
in HEAT or FAN mode.

The air curtain is designed only for use with a Mitsubishi Electric City Multi (VRF) system
for use on R410A. The complete Thermoscreens air curtain / Mitsubishi Electric heat pump
system, including fridge pipework, wiring, controls, etc. must be installed only by an
approved Mitsubishi Electric refrigeration contractor.

Persons using the air curtain must be given adequate instruction and supervision
concerning the use of the appliance by a person responsible for their safety. The air
curtain is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities.

These instructions must be read in conjunction with the separate Mitsubishi Electric
instructions that come with other components of the heat pump system, e.g. Compressor
Unit, BC Controller, PAR-30 MAA / PAR-27 MEA Remote Controller, BMS System,
Centralised Controller, etc. All instructions should be kept by the building facilities manager
for future reference.

T9901078-1 UK Page 8 of 36

UNPACKING THE AIR CURTAIN

The following items are supplied and packaged within the air curtain box :-

If anything is missing or damaged please contact your place of purchase immediately.

There will also be a 'City Multi (VRF) heat pump system' supplied by Mitsubishi Electric.

The Installer will also need to supply and install the following:-

The installer may also need to supply and install the following optional items:-

Condensate Pump – self priming with
cooling mode detection, alarm
system and pump overrun

If Air Curtain is to be operated in COOL or

AUTO mode and gravity drain cannot be used

– see text on Page 6 & 7 for more information

Door Switch – for energy efficient,

noise friendly, fan speed control,

Door open – Higher fan speed

Door shut – Lower fan speed

Gives industry standard fan speed control –see

wiring diagrams on Pages 18 & 19 and text on

Pages 20 & 24 for more information

Example Switch only

PAR-30 MAA or PAR-F27 MEA

Remote Controller

If Air Curtain is to be manually controlled,

also needed for commissioning

NB. The PAR-F27 MEA

Remote Controller
does not have a
timer/clock

V

RF Recessed Heat Pump Air Curtain

Air Inlet

Air Discharge

Recessed Grille with Filter

Air Discharge

A

ir Inlet

T9901078-1 UK Page 9 of 36

The complete Thermoscreens air curtain / Mitsubishi Electric heat pump system, to provide a
heat pump air curtain over a doorway, including wiring, fridge pipework, etc. is to be installed
only by an approved Mitsubishi Electric refrigeration contractor.

IMPORTANT
This Heat Pump Air Curtain is intended only for use with a Mitsubishi Electric City

Multi (VRF) system, for use on R410A.
These instructions must be read in conjunction with the separate Mitsubishi Electric

City Multi (VRF) instructions.

(All documentation supplied with the unit should be stored and kept for future reference.)

For your records:

Date of Purchase……………………………..

Place of Purchase…………………………….

Serial Number…………………………………

For warranty purposes proof of purchase is necessary so please keep a copy of your invoice.

T9901078-1 UK Page 10 of 36

Air Discharge

A

ir Inlet

DOORWAY

INSTALLATION OF THE HEAT PUMP AIR CURTAIN

The air curtain is designed to be recessed within ceiling voids or bulkheads within a
building and located horizontally over a doorway. It must not be installed outside of
the building.

Location

The air curtain must be mounted so the recessed grille
is located up to 3.8m maximum above floor level and
as close to the doorway as possible. The Air Discharge
section of the recessed grille must be nearest to the
doorway and the Air Inlet section furthest from the
doorway. The air curtain must be installed level or
condensate may leak out if used for cooling. Beware of
doorway top edges, structural beams, door
opening/closure devices, etc. which may interfere with
the air stream and affect the location of the unit.

Ensure there will be adequate clear space above the top of the unit within the ceiling void
to safely allow for pipework brazing operations.

Ceiling Suspension

Make the cut-out in the ceiling to the dimensions given
in Figure 1, Page 12, being as accurate as possible.
The air curtain can be manoeuvred straight up through
the ceiling cut-out. It may be necessary to notch the
ceiling cut-out in places to clear screws on the casing.
Alternatively the ceiling can be fitted after the air
curtain is installed. Bear in mind it will be necessary to
carry out pipework brazing operations above the air
curtain once it is located in position. Ensure there is
sufficient access and height clearance within the
ceiling void to do this.

Holes are provided in the top face of the casing (see Figure 1, Page 12 for positions) to
allow the unit to be suspended on M10 threaded rods (not provided). There are 4 hanging
points on the VRF HP1000R unit and 5 hanging points on the VRF HP1500R and VRF
HP2000R units - all hanging points must be used.

Air Curtain Weight (kg)

Number of

hanging points

VRF HP1000R DXE 52 4

VRF HP1500R DXE 75 5

VRF HP2000R DXE 93 5

There are two M10 hanging rods at each end of the unit (four in total) that enter the casing
from the top and attach to fixing brackets near the bottom of the unit (see picture above –
looking up into the air curtain). Use M10 lock-nuts either side of the fixing bracket to
secure the hanging rod. Do not let these four hanging rods come below the bottom of the
unit casing or they may prevent the recessed grille fitting properly.

M10
threaded
hanging
rods

Not to come
below casing

T9901078-1 UK Page 11 of 36

On the VRF HP1500R and VRF HP2000R units there is an additional hanging point
located towards the middle of the unit for an M10 hanging rod and this must be used.

Ensure each of the hanging rods is secured onto a suitable structure that can support the
weight of the unit (see Table on Page 10).*

Adjust the height of the unit on its hanging rods so the bottom surface of the casing goes
38mm up into the ceiling as shown in the diagram. Ensure the unit is level or condensate
may leak out if it is used for cooling.

CEILING LEVEL

38

CEILING LEVEL

38

Bottom surface of recessed
air curtain casing

M10 hanging rods

RECESSED AIR CURTAIN

* It is the sole responsibility of the installer to ensure that the building fixing locations and suspension system

used are suitable for the air curtain being installed.

T9901078-1 UK Page 12 of 36

CEILING LEVEL

539

6

D

A

65 265

2525

Liquid Line Refrigerant Connection (L)

Gas Line Refrigerant Connection (G)

485

348

Cut-Out

in Ceiling

1250 1750 2340

Length (mm)

Width (mm)

-

1129

1303 1803 2393

1250 1750 2340

485

-

1161

485 485

A (mm)

B (mm)

C (mm)

D (mm)

G

L

5

8

in.

1

2

in.

1

2

in.

170 166 189

E (mm)

E

100 115200

5

8

in.

7

8

in.

5

8

in.

VRF

HP1000R DXE

VRF

HP1500R DXE

VRF

HP2000R DXE

Holes for M10 drop rods

4 for 1m unit,

5 for 1.5m & 2m units

Use all drop rod holes !

724

976

B

C

100

20mm hole for gravity or pumped

condensate disposal (if cooling)

200

20mm hole on top for pumped

condensate disposal (if cooling)

Liquid Line Refrigerant

Connection (L)

Gas Line

Refrigerant

Connection (G)

Electrical Supply

and Mitsubishi

Wiring Inlets (M20)

Additional (M20)

Wiring Inlets on top

FIGURE 1 – DIMENSIONS OF VRF HP R HEAT PUMP AIR CURTAIN

T9901078-1 UK Page 13 of 36

HP1500R &

HP2000R only

Adjust
hanging rods

Fitting the Recessed Grille

The recessed grille consists of a metal frame, cellular
discharge grille and hinged inlet grille with inlet air filter
attached to it. There are 4 fixing points on the VRF
HP1000R unit and 6 fixing points on the VRF HP1500R
and VRF HP2000R units, see picture - arrows indicate the
fixing points.

Open the hinged inlet grille using a flat bladed screwdriver
to release the quarter turn fasteners, see picture. There
are 2 fasteners on the VRF HP1000R unit and 3 fasteners
on VRF HP1500R and VRF HP2000R units.

Make sure the grille will go the correct way around with the
cellular discharge nearest to the doorway. Offer the
recessed grille up through the cut-out in the ceiling and
attach it to the bottom of the air curtain casing using the
No.8 pozi head screws supplied. Start with the screws
shown in the picture and then fit the two at each end of the
discharge grille.

On VRF HP1500R and VRF HP2000R units there are two
additional screw fixing points, one at the middle of the unit
as shown in the picture,

and the other at the middle of the discharge grille, see
picture (this screw is easier to access if the hinged inlet
grille is temporarily shut).

With the hinged discharge grille open again adjust the
hanging rods so the grille frame fits neatly against the
ceiling. The grille frame should be a snug fit against the
ceiling with no gaps all the way around.

Note: Access for electrical connections, servicing and maintenance is by opening the

hinged grille core.

T9901078-1 UK Page 14 of 36

Mitsubishi Electric Compressor Unit

See table below for the VRF System Index Size to be used together with performance
data for the air curtain.

Air Curtain

VRF

system

Index Size

Air Curtain Parameters

Maximum

Heating

Output

(kW)

Maximum

Cooling

Output

(kW)

Max. Air

Volume

Flow Rate

(m3/h)

Maximum

Noise

Level

dB(A) @3m

Effective

Width of

Airstream

(m)

VRF HP1000R DXE P71 8.3 7.4 1310 58 1.18

VRF HP1500R DXE P125 13.2 11.8 2070 58 1.68

VRF HP2000R DXE P140 15.7 14.0 2590 58 2.27

Outputs based on:- Indoor air temperature = 20ºC. Outdoor condition = 7/6 db/wb ºC for heating output,
35/27 db/wb ºC for cooling output.
Performance figures derived from independent testing by UK test houses BRE and BSRIA in accordance with
test standard EN14511. Noise testing carried out at Sound Research Laboratories to ISO3741 and BS4856-4.
See Table on Page 25 for more details of air volume flow rates and noise levels.

Refrigerant Pipework

This must be carried out before connection of any electrical and controls cables
and in accordance with the Instructions that come with the Mitsubishi Electric
City Multi system. This work must only be undertaken by a Mitsubishi Electric
approved Contractor.

Contact Mitsubishi Electric for recommended pipework sizes, pipework lengths,
numbers of fittings, etc.

The installation must be carried out in accordance with the Mitsubishi Electric
Installation Manual that comes with the compressor unit and with reference to the Index
Size of the air curtain (indoor unit).

It is intended that refrigerant pipe connections to the air curtain are made using brazed
joints and these must be carried out in a professional and safe manner. If installation
pipe sizes for the discharge (gas) line and liquid line are different from the pipe
connection sizes on the air curtain (see Figure 1, Page 10), suitable pipe reducers must
be used for the connection. R410A refrigerant systems can operate at pressures up to
610 psi (c. 42 Bar). These brazed joints may well be located in a public area and a
weakness leading to an explosion could be extremely dangerous.

The air curtain with its coil is manufactured in accordance with the Pressure Equipment
Directive (PED) and the installation must be carried out to a good standard of
workmanship. Protect the top surface of the air curtain and use a heat sink on the
copper pipes during brazing to reduce the transfer of heat to the inside of the air curtain
where sensitive components are located. Make sure the thermistor (gas) sensor has not
been inserted into its pocket on the gas line pipe at the top of the air curtain before
brazing. Remove it if it has or it will burn and damage when the pipe connection is
brazed.

T9901078-1 UK Page 15 of 36

For the City Multi (VRF) R2 and WR2 Series system, pipework from each air curtain
must connect to one pair of ports on the Mitsubishi Electric BC Controller. Do not
combine pipework from two or more air curtains together into one set of pipework and
then connect this to one pair of ports. With the VRF HP2000 DXE air curtain, however,
although a maximum P140 Index is possible from 1 pair of ports it is recommended that
2 pairs of ports on the BC Controller are used to achieve the correct output, contact
Mitsubishi Electric for advice.

Fit the thermistor (gas) sensor bulb into the Hot-Gas pocket on
the refrigerant gas pipe at the top of the air curtain after brazing
all pipe connections. Insulate over the pocket when insulating
the refrigerant pipework.

To gain access inside the Air Curtain

To gain access for connection of the electrical supply, controls wiring and to work on the
unit during commissioning it is necessary to open the hinged inlet grille.

Open the hinged inlet grille using a flat bladed
screwdriver to release the quarter turn fasteners, see
picture. There are 2 fasteners on the VRF HP1000R
unit and 3 fasteners on VRF HP1500R and VRF
HP2000R units.

The hinged inlet grille then hinges down to provide
access into the air curtain, see picture.

T9901078-1 UK Page 16 of 36

Electrical Supply and Wiring to the Air Curtain

This must be carried out AFTER the connection of the refrigerant pipework. All
electrical wiring and connections MUST be carried out by a competent qualified
electrician in accordance with the latest edition of the IEE wiring regulations
and/or local statutory regulations. (see also Wiring Diagrams 1 & 2 on Page 18/19)

 A local isolator having a contact separation of at least 3mm on all poles must be

fitted in the 1 phase electrical supply (1L + N + E) to the air curtain and located in
an accessible position adjacent to the unit.

 If the defrost cycle auxiliary heater is to be used the air curtain then requires a 3

phase electrical supply (3L + N + E) to the air curtain instead of a 1 phase
electrical supply. A local isolator having a contact separation of at least 3mm on all
poles must be fitted in the 3 phase electrical supply and located in an accessible
position adjacent to the unit. The defrost cycle auxiliary heater will need to be
enabled during commissioning (see Section ‘Design Information’ – Page 5 and
Section ‘Commissioning’ Page 22).

 The appliance must be connected using cables having an appropriate temperature

rating (heat resistant).

 Ensure that the supply cables, circuit breakers and other electrical installation

equipment are correctly sized for the air curtain being installed. See Table below.

 A 25mm size cable gland or conduit connector should be used for the Electrical

Supply into the air curtain. See Figure 1, Page 12 showing where the electrical
supply enters the unit.

 This appliance must be Earthed.

 Wire in accordance either with 1) or 2) in the Table below:

Air Curtain

1) Unit as supplied - defrost cycle

auxiliary heater is disabled

(230V/1ph/50Hz electrical supply from

separate local isolator)

2) the defrost cycle auxiliary heater is

to be enabled during commissioning

(400V/3ph/50Hz electrical supply from

separate local isolator)

Rated Electrical

Power Input (kW)

Rated Current (A)

Rated Electrical

Power Input (kW)

Rated Current per

phase (A)

VRF HP1000R DXE

0.2 0.8 4.7 7.3

VRF HP1500R DXE

0.3 1.2 7.8 12.1

VRF HP2000R DXE

0.35 1.4 9.35 14.4

1) Unit as supplied – defrost cycle auxiliary heater
is disabled, see Wiring Diagram 1, Page 18

(230V/1ph/50Hz electrical supply from separate

local isolator)

Connect to terminals Earth, L1 and N with a 1-phase
electrical supply.

Connect a Mitsubishi Electric PAR-30MAA Remote
Controller to terminals 1 and 2 on the air curtain, or a
PAR-F27MEA to terminals M1 and M2.

Connect the M-Net 2-core cable to terminals M1 and
M2 on the air curtain – this is the communication link
between the City Multi system and the air curtain.

T9901078-1 UK Page 17 of 36

2) If the defrost cycle auxiliary heater is to be
enabled during site commissioning, see Wiring
Diagram 2, Page 19

(400V/3ph/50Hz electrical supply from separate

local isolator)

Connect to terminals Earth, L1, L2, L3 and N with a 3­phase electrical supply.

Connect a Mitsubishi Electric PAR-30MAA Remote
Controller to terminals 1 and 2 on the air curtain, or a
PAR-F27MEA to terminals M1 and M2.

Connect the M-Net 2-core cable to terminals M1 and
M2 on the air curtain – this is the communication link
between the City Multi system and the air curtain.

If required the defrost cycle auxiliary heater can be enabled
by disconnecting the neutral wire (violet) from the auxiliary
terminal 14NO on the contactor inside the air curtain. This
wire is then connected onto terminal A2 on the contactor
as shown in the adjacent picture (see also Wiring Diagram 2

on Page 19).

Recommended wire sizes for electrical connections are as follows:

Electrical Connection Wire Size

1-phase electrical supply from separate local isolator 2.5mm2 max. for access
3-phase electrical supply from separate local isolator - if the
defrost cycle auxiliary heater is to be enabled

2.5mm2 max. for access

Mitsubishi Electric PAR-30MAA or PAR-27MEA Remote
Controller (2-core cable)

0.75mm2

Mitsubishi Electric M-Net (2-core cable) 0.75mm2
Door switch to change fan speeds as door opens and shuts 0.75mm2

T9901078-1 UK Page 18 of 36

230V/1ph/50Hz Electrical Supply

VRF HP1000DXE = 0.8A

VRF HP1500DXE = 1.2A

VRF HP2000DXE = 1.4A

L1 N

TERMINAL

BLOCK

K1

K1

THERMOSCREENS HEAT PUMP AIR CURTAIN

PAR-30MAA MANUAL

ROOM CONTROLLER

M-NET COMMUNICATION BUS TO CITY

MULTI SYSTEM & PAR-F27MEA CONTROL

MITSUBISHI HEAT PUMP SYSTEM ERROR

SIGNAL (OUTPUT) Cl osed Circuit = Error

S

I

T

E

W

I

R

I

N

G

L1

L2

L3

N

1

2

M1

M2

3

A1

A2

D11

D12

Orange

Pink

Black

Pink/Black

Brown

Violet

Blue

White

Brown

Black

Grey

DEFROST CYCLE

AUXILIARY HEATER

Yellow

Red

Black

Brown

FILTER

INDICATOR

PCB

ERROR

SIGNAL

OPERATING

SIGNAL

DEFROST

Mitsubishi

Transformer

12V DC DURING OPERATION

0V DURING DEFROST

Red Red

Red

Black

Yellow

Grey

Yellow

Red

Blue

Green/Yellow

Blue

Brown

Violet

LEV

Brown

Brown

MITSUBISHI ELECTRIC

INTERFACE PCB

from PAC-AH...M-G

Black rectangle indicates moveable head of dip switch

Thermistor (Gas) - Sensor fitted on

site in top pocket after brazing

Thermistor (Liquid) - Factory fitted

Thermistor (Inlet Air) - Factory fitted

CONDENSATE ALARM

Open Circuit = Alarm

(Compressor Stops)

Black

White

Red

A

B

FUSE

TERM.

Grey

T 5A

FUSE

L

N

230v AC electrical power for

condensate pump (if required)

High

Low

Med

Fan

Grey

0

1

2

345

6

1~

White (Neutral)

Black (High)

Grey

Yellow

Brown

Blue

Red (Low)

FAN MOTOR 1

012

345

6

1~

White (Neutral)

Black (High)

Grey

Yellow

Brown

Blue

Red (Low)

Green

Orange

Blue

Red

FAN MOTOR 2

(2m unit only)

White

The air curtain is

delivered with the

Defrost Cycle Auxiliary

Heater disabled.

Enable/Disable 'PAR Controller' for ON/OFF

(ENABLE = NO LINK, DISABLE = LINK)

REMOTE ON/OFF, if li nk is between (A1 - 3)

Pink

Pink

4

Defrost Heater

Thermal Trip

(x2 on 2m unit)

12V

230V

High

Low

Med

Fan

Door Open - Higher speed

Door Closed - Lower speed

Door-Switch

2A - AC3, 230v AC

REMOVE

WIRE LINK

CHANGE PCB

DIP SW4 TO

4

Wire in door switch:-

UN-PLUG CONNECTOR CN90 FROM PCB

1

2

3

4

4

12V DC

Relay

12V DC

Relay

12V DC

Relay

12V DC, 1mA

0V

Grey

Black

TOC

TOC

Black

Yellow

Red

Red

WIRING DIAGRAM 1 – VRF HP HEAT PUMP AIR CURTAIN (No Defrost Cycle Heater – unit as supplied)

T9901078-1 UK Page 19 of 36

TERMINAL

BLOCK

K1

K1

1m unit 3 x 1.5kW = 4.5kW

1.5m unit 3 x 2. 5kW = 7.5kW

2m unit 3 x 3.0kW = 9kW

12V DC

Relay

400V/3ph/50Hz Electrical Supply

for if Defrost Cycle Auxiliary Heater is to

be enabled during site commissioning

VRF HP1000DXE = 7.3A per phase

VRF HP1500DXE = 12.1A per phase

VRF HP2000DXE = 14.4A per phase

PAR-30MAA MANUAL

ROOM CONTROLLER

M-NET COMMUNICATION BUS TO CITY

MULTI SYSTEM & PAR-F27MEA CONTROL

Enable/Disabl e 'PAR Controller' for ON/OFF

(ENABLE = NO LINK, DISABLE = LINK)

REMOTE ON/OFF, i f link is between (A1 - 3)

MITSUBISHI HEAT PUMP SYSTEM ERROR

SIGNAL (OUTPUT) Closed Circuit = Error

S

I

T

E

W

I

RI

NG

L1

L2

L3

N

1

2

M1

M2

3

A1

A2

D11

D12

Pink

Black

Pink/Black

Brown

Violet

Blue

White

L1 L2 L3 N

Brown

Black

Grey

Red

Black

Brown

FILTER

INDICATOR

PCB

ERROR

SIGNAL

OPERATING

SIGNAL

DEFROST

Mitsubishi

Transformer

12V DC DURING OPERATION

0V DURING DEFROS T

Red Red

Grey

Black

Pink

Yellow

Red

Blue

Green/Yellow

Blue

Brown

Violet

LEV

Brown

Brown

MITSUBISHI ELECTRIC

INTERFACE PCB

from PAC-AH...M-G

Black rectangle indicates moveable head of dip switch

Thermistor (Gas) - Sensor fitted on

site in top pocket after brazing

Thermistor (Liquid) - Factory fitted

Thermistor (Inlet Air) - Factory fitted

CONDENSATE ALARM

Open Circuit = Alarm

(Compressor Stops)

Black

White

Red

A

B

FUSE

TERM.

3-PHASE

CONTACTOR

FOR DEFROST

HEATER

Grey

T 5A

FUSE

L

N

230v AC electrical power for

condensate pump (if required)

WARNING! 400V on some terminals

High

Low

Med

Fan

Grey

0123456

1~

White (Neutral)

Black (High)

Grey

Yellow

Brown

Blue

Red (Low)

FAN MOTOR 1

012

3

4

5

6

1~

White (Neutral)

Black (High)

Grey

Yellow

Brown

Blue

Red (Low)

Green

Orange

Blue

Red

FAN MOTOR 2

(2m unit only)

Defrost Heater

Thermal Trip

(x2 on 2m unit)

MOVE VIOLET

NEUTRAL WIRE

FROM TERMINAL

14NO TO TERMINAL

A2 FOR DEFROST

HEATER TO WORK

High

Low

Med

Fan

Door Open - Higher speed

Door Closed - Lower speed

Door-Switch

2A - AC3, 230v AC

REMOVE

WIRE LINK

CHANGE PCB

DIP SW4 TO

DEFROST CYCLE

AUXILIARY HEATER

Pink

Orange

Yellow

Yellow

TOC

TOC

4

4

12V

230V

Wire in door switch:-

UN-PLUG CONNECTOR CN90 FROM PCB

1

2

3

4

4

12V DC

Relay

12V DC

Relay

12V DC, 1mA

0V

Red

Black

White

Black

Yellow

Red

Grey

THERMOSCREENS HEAT PUMP AIR CURTAIN

Red

WIRING DIAGRAM 2 – VRF HP HEAT PUMP AIR CURTAIN (Defrost Cycle Auxiliary Heater enabled on site)

T9901078-1 UK Page 20 of 36

PAR-30MAA Remote Controller

If the air curtain is to be manually controlled by the end user a
Mitsubishi Electric PAR-30MAA remote controller (not supplied by
Thermoscreens) must be supplied and fitted by the installer. This is
wired to terminals 1 and 2 on the air curtain using 2-core cable. Refer
to the Mitsubishi Electric instructions that come with the PAR-30MAA
remote controller for the installation and wiring of the controller.
A PAR-30MAA Remote Controller is also required for commissioning
purposes and if using AUTO mode with a BMS System or Centralised
Controller. Master/Slave control with a PAR-30MAA should be done
as follows:-

NB. Y-Series systems need two controllers for AUTO control, Master at the lower address,

refer to Mitsubishi Electric for details.

A PAR-F27MEA can also be used to manually control the air curtain. The PAR-F27MEA is
a M-NET device and must be connected to terminals M1 & M2 on the air curtain or
anywhere in the M-NET wiring, it does not offer timed switching however.

Wiring of Air Curtain Fan Speed

As delivered the air curtain is set-up to provide 3-speed fan control (High, Medium and
Low) using a PAR-30MAA or PAR-F27MEA remote controller. A suitable alternative is to
have a Door-Switch wired to switch the unit between a Higher fan speed - Door Open and
a Lower fan speed - Door Closed. This is both energy efficient and noise friendly. There is
a wire link that needs to be removed from the air curtain terminals and dip switch SW4
needs to be changed (the PAR-30MAA or PAR-F27MEA remote controller will not then
provide 3-speed fan control). See Wiring Diagram 1 or 2 on Pages 18 or 19 for details and
Section, Commissioning; ‘Selecting the fan speeds of the air curtain’ on page 24 which
gives details as to how the available speeds of the six speed fan motor(s) can be set to
suit outdoor environmental conditions and indoor noise levels.

Condensate Disposal System

If it is intended to use the air curtain in cooling mode a condensate disposal system must
be installed.

The air curtain is fitted with a condensate drain tray with
15mm copper outlet pipe at the right hand side of the air
curtain. Suitable condensate hose can be fitted to the pipe
(see picture) and fed through a 20mm hole at the back of the
unit, see Figure 1, Page 12, so condensate will gravity drain
away. Means of condensate disposal must then be provided
at the rear of the air curtain.

21

AIR CURTAIN

PAR-30MAA

12V DC

2121

AIR CURTAIN AIR CURTAIN

T9901078-1 UK Page 21 of 36

If it is not practical to gravity drain from the air curtain a suitable condensate pump (not
supplied with the unit) can be supplied and fitted by the installer to remove condensate
directly from the unit. The condensate pump must be of sufficient capacity (see Table
below) and if located higher than the drain tray; self priming and capable of providing the
appropriate suction head so the pump will lift condensate out from the top of the air
curtain. Suitable condensate pumps with a suction head are Peristaltic or Rotary
Diaphragm type. It is recommended that the condensate pump has the facility so it only
operates when the air curtain is in cooling mode by detection of water in the drain tray or
by detecting a cooling differential in the airflow. It should also have a pump overrun to
empty the drain tray as much as possible when the air curtain is switched off. We
recommend the Blue Diamond rotary diaphragm type with cooling signal sensor (drainStik)
manufactured by Charles Austen Pumps Ltd. (www.miniblue.co.uk).

Air Curtain

Maximum likely condensate flow rate

(litres/hour)

VRF HP1000R DXE

6.0

VRF HP1500R DXE

9.0

VRF HP2000R DXE

11.0

There is space inside the air curtain at the right hand end of the unit to mount a
condensate pump. A permanent 230V AC, single phase electrical supply is provided inside
the air curtain at the DIN-Rail terminals to power the pump. See Wiring Diagrams 1 & 2 on
Pages 18 and 19. There are two 20mm condensate outlet holes in the casing, one at the
top of the unit and a lower one at the rear, both fitted with rubber plugs (see Figure 1,
Page 12). These can be used to feed a hose from the condensate pump to a remote
condensate drain.

Condensate drain hose should be pushed through either of the two condensate outlet
holes after removing the plug and connected to the condensate pump using the adapter
supplied with the pump. It may be necessary to extend the hose if the pump is remotely
located.

Whether a gravity drain system or a condensate pump is used to remove the condensate
there should be an alarm system with appropriate sensor fitted in the drain tray that will
give a volt-free signal (open circuit = alarm). A 2-wire condensate alarm signal should be
wired back to the condensate alarm connection provided at the Interface PCB inside the
air curtain. This will stop the air curtain cooling if the condensate drain tray is in danger of
flooding, bringing up an error code on the Mitsubishi Electric system (air curtain fans will
continue to operate). Other indoor units on the same City Multi system are unaffected if the
air curtain condensate alarm occurs.

There is a fixing bracket with 8mm diameter hole attached to
the drain tray inside the air curtain so a condensate alarm
sensor can be fixed in the tray by the installer. Hinge the
drain tray down to gain better access to the fixing bracket
(see picture and Section, Servicing – Page 31). Enlarge the
hole if necessary to suit the type of sensor being used so it is
located in the tray at the appropriate position. If a
condensate pump is being used see the manufacturers
instructions that come with the pump for further information.

T9901078-1 UK Page 22 of 36

COMMISSIONING THE AIR CURTAIN

Ensure that the local electrical supply to the Air Curtain and if necessary the
electrical supply to the Mitsubishi Electric City Multi system are switched off.

Air Curtain Checks

Check that the components inside the air curtain are as shown in the picture below. If
the defrost cycle auxiliary heater has been enabled check that the thermal overheat cut­out switch(s) has not ‘tripped’. Press the reset button in the unit (2 on a VRF HP2000R
unit). If the cut-out switch has tripped it will click back on – see picture.

There is a Mitsubishi Electric Interface PCB located within the left hand end of the
Thermoscreens Air Curtain. This provides control and communication between the
Mitsubishi Electric City Multi system and the Air Curtain Indoor Unit. It is held in place by
a fixing screw located at the bottom edge of the PCB, see picture. Remove the screw
and carefully slide the PCB partially out.

HP2000R onl

y

Interface
PCB

Air Inlet

Sensor

RED

PCB fixing screw

DIP SWITCHES

Condensate
Pump Alarm

Connection

T9901078-1 UK Page 23 of 36

Check that the dip switches on the Interface PCB are set as shown in Wiring Diagram 1
or 2 on Pages 18 and 19. The SW2 Capacity Setting dip switch should be as follows:

Black rectangle indicates moveable head of dip switch

VRF HP1000R

1

OFF

3

45

62

SW2 for P71

VRF HP1500R VRF HP2000R

13

45

6213

45

62

ON

OFF

ON

OFF

ON

SW2 for P125 SW2 for P140

NB. If a Door Switch to switch fan speeds has been fitted, as an alternative to the PAR-

30MAA 3-speed fan control, dip switch SW4 will also need to be changed. See
Wiring Diagram 1 or 2 on Pages 18 and 19 for details.

Check that the wiring between the Air Curtain and the City Multi (VRF) system is in
accordance with Wiring Diagrams 1 or 2 on Pages 18 and 19. If still withdrawn, carefully
slide the Interface PCB back into place. Ensure cables are not trapped inside and refit
the retaining screw.

If not already done wire a Mitsubishi Electric PAR-30MAA Remote Controller to
terminals 1 and 2, or a PAR-F27MEA Remote Controller to terminals M1 and M2 (see
Wiring Diagram 1 or 2 on Pages 18 and 19 for details). This is used to set the air curtain
to the mode of operation, HEAT, FAN, AUTO or COOL, and to set the target
temperature.

T9901078-1 UK Page 24 of 36

Selecting the Fan Speeds of the Air Curtain

The fan motor(s) in the air curtain is a 6-speed motor and fan speeds can be re-selected at
commissioning to suit the installation, both to suit the outdoor environmental conditions
and for indoor noise levels.

As delivered, for the 3 fan speeds available from the PAR-30MAA or PAR-F27MEA remote
controller:-

the HIGH fan speed (black wire) is wired into motor tapping 1 (highest motor speed
tapping),

the MEDIUM fan speed (yellow wire) is wired into motor tapping 3,

the LOW fan speed (red wire) is wired into motor tapping 6 (lowest motor speed tapping),

VRF HP1000R DXE
VRF HP2000R DXE

VRF HP1500R DXE

6 5 4 3 2 1

6

5 4 3 2 1

T9901078-1 UK Page 25 of 36

The table below provides guidance as to how the fan speeds can be set. WARNING:
There are two motors on the VRF HP2000R DXE model, make sure both motors are
wired up in exactly the same way or the motors will overheat with possible damage.

Fan

Speed

(air curtain

as

delivered)

Motor Speed

Tapping

(see Wiring Diagram
1, Page 16 or Wiring
Diagram 2, Page 17)

Recommended air

curtain mounting height

(m)

Sound

Pressure

Level of air

curtain

[dB(A) at 3m]

Air Volume

Flow Rate

(m

3

/h)

Normal

site

Exposed

site

HIGH

(black
wire)

1 – black wire at

motor

(Highest speed)

3.8

3.3

HP1000DXE - 58
HP1500DXE - 58
HP2000DXE - 58

1310
2070
2590

2 – grey wire at

motor

3.5

3.0

HP1000DXE - 57
HP1500DXE - 55
HP2000DXE - 57

1250
1900
2480

MEDIUM

(yellow
wire)

3 – yellow wire at

motor

3.2

2.8

HP1000DXE - 55
HP1500DXE - 54
HP2000DXE - 55

1170
1800
2340

4 – brown wire at

motor

2.8

2.3

HP1000DXE - 53
HP1500DXE - 52
HP2000DXE - 53

1070
1650
2160

5 – blue wire at

motor

2.4

2.0

HP1000DXE - 50
HP1500DXE - 49
HP2000DXE - 50

970
1450
1930

LOW

(red wire)

6 – red wire at

motor

(Lowest speed)

2.0

1.7

HP1000DXE - 48
HP1500DXE - 45
HP2000DXE - 48

900
1240
1810

See also Section, Installation; ‘Wiring of Air Curtain Fan Speed’ on Page 20 giving details of how
to wire in fan speeds.

Sound pressure levels dB(A) at 3m distance are for a single air curtain mounted at its maximum mounting height, operating in a room
with average acoustic characteristics as defined in CIBSE Guide B5 (reverberation time 0.7s at 1kHz) and a room size equivalent to 8
air changes per hour (ac/h). Care needs to be taken when selecting air curtains for an installation as noise levels can be several dB
higher if the mounting height is reduced, if the room is more ‘live’ (i.e. hard surfaces, no furnishings or absorbent materials), if the room
is smaller than 8 ac/h equivalent or a combination of these factors. Noise levels will also increase if more than one air curtain is
installed at the same doorway (e.g. +3dB(A) for 2 equal point sources: direct field).

T9901078-1 UK Page 26 of 36

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

T9901078-1 UK Page 27 of 36

curtain and it should run in this set-up with no further adjustments, automatically heating
as required. If the target temperature is reached the air curtain fans will still operate but
the air stream is then not heated (ambient air curtain).

If the end user is to operate the air curtain with a remote controller, set up the No.1
locking function on the controller so they can only switch the air curtain ON or OFF, with
no control of mode or target temperatures. If there is no condensate disposal system
fitted COOL mode must be locked off on the remote controller so it cannot be used. See
instructions for the Mitsubishi Electric PAR-30MAA or PAR-F27MEA remote controller.

If the air curtain is to be operated from a BMS System or Centralised Controller this
should be configured such that the air curtain can only operate in HEAT or FAN mode if
it is not fitted with a condensate disposal system. The air curtain should only be
configured to operate in AUTO or COOL mode if it is fitted with a condensate disposal
system.

BEWARE: It is possible for the air curtain to go into cooling mode on a warm day if the

Remote Controller, BMS System or Centralised Controller is set in AUTO mode. A
condensate disposal system must therefore be fitted if the air curtain is to be used in
AUTO mode.

Switch off the electrical power to the Air Curtain and the Mitsubishi Electric City Multi
system. Carefully slide the Interface PCB back into place. Ensure cables are not
trapped inside and refit retaining screw.

Filter Dirty Indicator

The air curtain is fitted with a Filter Dirty Indicator. It is located at
the left-hand end of the unit just above the inlet grille and signals
when the air curtain inlet grille/filters should be vacuum cleaned
or the air curtain requires servicing. Open the hinged inlet grille
to gain access to the filter dirty indicator.

NB.The filter dirty interval feature on the Mitsubishi Electric

remote controller is not available.

The indicator states are outlined below:

Indicator State Indicator Light Action Required Reset Button

GREEN FLASH On 0.5s; Off 3s None N/A

RED ON On permanently Vacuum inlet Quick reset

RED FLASH On 0.5s; Off 0.5s Service filters Press for 5s

The filter indicator schedule is based on fan operating hours. For the default schedule,
shown schematically below, the inlet grilles should be vacuum cleaned every 240hrs of
fan operation (3 to 4 weeks depending on use) and a full service should take place
every 960hrs of fan operation (4 to 6 months depending on use).

T9901078-1 UK Page 28 of 36

jumper

The factory set default schedule is suitable for most applications. However, the actual
frequency of cleaning required will depend on the environment. Two alternative filter
indicator schedules are available, and can be selected by changing the ‘jumper’ position
(marked 1, 2 or 3) on the Filter Indicator PCB.

Filter Indicator Schedule

Half

Period

Default

Period

Double

Period

Jumper position

Inlet grille vacuum interval 120 hrs 240 hrs 480 hrs

Filter service interval 480 hrs 960 hrs 1920 hrs

To access the Filter Indicator PCB to change the jumper position:-

Open the hinged recessed inlet grille (see Section ‘To gain access inside the Air
Curtain’, Page 15).

The Filter Indicator PCB is now accessible to change the
jumper position, see picture.

Final Check of the Unit

Close the hinged inlet grille and re-fasten the quarter turn fasteners.

Power-up both the Mitsubishi Electric City Multi system and the Air Curtain and re-check
the operation of the unit.

1

23

   

123

   

1 2

3

   

MT2

START

240 hrs

240 hrs

240 hrs

240 hrs

960 hrs

RED ON: Quick reset

RED ON: Quick reset

RED ON: Quick reset

RED FLASH: Hold 5s to reset

Fan operating hours

T9901078-1 UK Page 29 of 36

Hand-over to End-User

Before leaving site it is important that there is a 'Hand-Over Meeting' to hand-over the
heat pump system and air curtain installation to the end user or their representative.
This should include a full and clear explanation of how the system operates and a
demonstration showing the air curtain running. Be sure to explain the Filter Indicator
Schedule, that the air inlet grilles and air filters must be regularly vacuum cleaned and
the unit serviced at regular intervals. See “Servicing the Air Curtain” page 31.

If the air curtain is to be operated under manual control using a PAR-30MAA or PAR­F27MEA remote controller, it is important that the end user understands how the heat
pump system works. That the air curtain operates in FAN (Ambient) mode or in HEAT
mode with a fixed target temperature of, say, 24°C.

Explain how the fan speeds operate, whether this is manual 3-speed fan control using a
PAR-30MAA or PAR-F27MEA remote controller if there is a door operated switch that
switches fan speeds to High – Door open, or Low – Door closed.

If a condensate drain system has been installed and it is intended that the unit is to
operate in cooling mode, show the end user how the COOL/AUTO mode operates.
Leave the system set to HEAT and lock all buttons on the remote controller except the
ON/OFF button before leaving site (No.1 locking function).

If the air curtain is to be operated under the control of a BMS System or Centralised
Controller, explain all the settings and demonstrate the operation of the system. That
the air curtain should be operated in FAN (Ambient) mode or in HEAT mode with a fixed
target temperature of, say, 24°C. It is vital they understand that the air curtain must not
be run in COOL or AUTO mode if a condensate drain system has not been installed.

If a condensate pump and drain system has been fitted and the air curtain is to be
operated in COOL mode explain that the target temperature should be adjusted to a
comfortable level of cooling, not necessarily to the lowest target temperature possible
as this uses a lot more energy and increases the carbon footprint.

Explain to the end user that the doorway should be closed whenever possible but
that during times of high pedestrian use it will become effectively ‘open doorway’.
The air curtain serves an essential purpose by saving energy and providing
comfort to the occupants when compared to an open doorway with no air curtain
fitted.

Ensure that all instructions and manuals are handed to the end user or their
representative.

T9901078-1 UK Page 30 of 36

USER INSTRUCTIONS FOR THE AIR CURTAIN

To Switch On and Off:

Turn the air curtain ON by pressing the ON/OFF Button on the PAR-30MAA (or PAR­F27MEA) Remote Controller and the air curtain fans will start within a few seconds. As

set up by the Commissioning Technician the air curtain will operate in Heat mode,

automatically heating as required, with a target temperature of 24°C - all other buttons
on the Remote Controller are locked out.

Turn the air curtain OFF by pressing the ON/OFF Button on the Remote Controller and
the air curtain fans will stop. Do not turn off if DEFROST shows on the screen, wait until
5 minutes after defrost has finished.

If the Remote Controller is not locked the following functions operate:-

FAN SPEEDS:

If enabled, press the Fan Speed Button on the Remote Controller to operate the fans on
LOW, MEDIUM or HIGH fan speed. Fan speed logic is explained in the diagram above.
If a door switch is set-up to change fan speeds Fan Speed Button will not operate.

HEAT Mode:

Press the Mode Button on the Remote Controller until Heat appears on the display.
Adjust the target temperature using the - or + Temp. buttons between 22°C and 28°C

maximum. This is the normal mode of operation for the heat pump air curtain and it
should run in this set-up with no further adjustments, automatically heating as required.
Allow time for the air stream to heat up.

AUTO Mode: (only use if a condensate pump and drain system is fitted)

Press the Mode Button on the Remote Controller until Auto appears on the display.
Adjust the target temperature using the - or + Temp. buttons. Allow time for the air

stream to heat up or cool down.

FAN Mode (Fan only - no heating or cooling):

Press the Mode Button on the Remote Controller until Fan appears on the display.

COOL Mode: (only use if a condensate pump and drain system is fitted)

Press the Mode Button on the Remote Controller until Cool appears on the display.
Adjust the target temperature using the - or + Temp. buttons between 24°C and 19°C

(minimum recommended). Allow time for the air stream to cool. Do not necessarily use
the lowest target temperature possible as this uses more energy and carbon resources.

PAR-30MAA Remote Controller

20°C

26°C

Inlet Air Temp. or
Room Air Temp.

Target

Tem

p

erature

ON/OFF Button

Mode

Temp. Fan

+

-

Fan Speed Button

Heat, Auto heating & Fan Modes

(Low or Medium or High Fan Speed)

Cool & Auto cooling Modes

(fixed Medium Fan Speed)

T9901078-1 UK Page 31 of 36

SERVICING THE AIR CURTAIN

Vacuum Clean the Air Inlet Grilles / Filters

(Fortnightly, or when the Filter Dirty Indicator shows PERMANENT RED)

With the air curtain switched OFF, a vacuum cleaner with an
extension tube and brush attachment at its end should be used
to clean the face of the air inlet grille and the filter at the back
of the grille. This is important to minimise the build-up of dust
and lint on the air filter which will affect the performance of the
air curtain. This is a simple service task that can be carried out
by the Cleaner or Janitor on a weekly basis from floor level
without having to access the air curtain at high level. This
should be done weekly as a regular service task and/or when
the Filter Dirty Indicator shows permanent red.

ONLY if the Filter Dirty Indicator shows PERMANENT RED

Open the hinge down recessed grille and reset the Filter
Dirty Indicator after cleaning by a quick press of the Reset
Button.

NB. The filter dirty interval feature on the Mitsubishi Electric

remote controller is not available

Servicing the Air Curtain

(suggest every 6 Months, or if the Filter Dirty Indicator shows FLASHING RED)

Before servicing, maintaining or repairing the Air Curtain always isolate the local
electrical supply to the Air Curtain and, if necessary, the electrical supply to the
Mitsubishi Electric City Multi system.

Note: All servicing, maintenance and repairs to the air curtain must be carried out by an

approved Service Agent. Keep any loose fixings for re-assembly.

Open the hinged inlet grille using a flat bladed
screwdriver to release the quarter turn fasteners, see
picture. There are 2 fasteners on the VRF HP1000R
unit and 3 fasteners on VRF HP1500R and VRF
HP2000R units.

The hinged inlet grille then hinges down to provide
access into the air curtain, see picture.

T9901078-1 UK Page 32 of 36

The air inlet filter can now be unclipped from the
top of the grille and brushed and vacuum cleaned.

Refit the filter opposite to removal. The filter is durable but may need to be replaced
after a number of service intervals.

Vacuum clean and remove any build-up of dust, dirt and debris within the air-curtain,
especially on the fans.

Note: Fan motors are permanently lubricated and require no additional lubrication.

If the Air Curtain has been used in Cooling:-

Remove condensate hose from the drain tray outlet

pipe, see picture.

Loosen the row of screws that secure air guide (see
picture) and pull air guide up on slots. Do not remove
these screws completely.

Remove the row of fixing screws along the whole
length of the drain tray (see picture).

The drain tray now hinges down along its front
edge and the inside surface of the tray can be
cleaned. Remove all debris and deposits from
the coil face, drain tray, outlet pipe, condensate
hoses and the condensate disposal system.

T9901078-1 UK Page 33 of 36

Check there are no kinks in condensate hoses. If the condensate pump is a peristaltic
type change the rubber pump head tube. Refit drain tray opposite to removal.

Once the air curtain has been cleaned, visually inspect the air curtain components.
Ensure pipe temperature sensors are located in their pockets and any foam insulation
covering these pockets is un-damaged. Check that the thermal overheat cut-out switch
(two on a VRF HP2000DXE R unit) has not tripped (see Section – Commissioning,
Page 22). Check all electrical connections and terminals within the unit are tight and
that crimp connections have not become loose.

Close the hinged inlet grille and re-fasten the quarter turn fasteners.

Switch on the electrical supplies and fully function test the air curtain to ensure correct
operation (see Section – Commissioning, Page 22). Check the condensate pump
operates, if fitted.

Reset the Filter Dirty Indicator after the service by pressing
the Reset Button for at least 5 seconds (even if the indicator
has not gone flashing red) and hand back the unit to the
end user.

T9901078-1 UK Page 34 of 36

Fault Finding

If the Thermoscreens Heat Pump Air Curtain System does not operate as expected refer
to the fault finding table below:

Symptom Possible Cause Action Required

Air curtain

fans do not

operate

Electrical power is not switched on to
the Mitsubishi Electric City Multi system
and at the local electrical isolator next to
the Thermoscreens Air Curtain

Switch on power to all
components in the heat pump
system and wait for system to
boot-up

Air curtain is not switched On

Switch on the air curtain using
the Remote Controller, BMS
System or Centralised

Controller
Remote ON/OFF or ENABLE/DISABLE
wiring to terminals 3, A1 & A2 not wired
up correctly

Wire terminals 3, A1 & A2

correctly – see Wiring

Diagrams
Problem with air curtain fan motor(s),
internal wiring, controls or fan speed
door switch if fitted

Use wiring diagram to

investigate possible cause of

fault

Air curtain
discharge air
stream is not

heating or
cooling when

required

Air curtain has been running for less
than 20 minutes and is still warming up
or cooling down

Give system sufficient time to
reach operating condition

Air curtain is set to Fan-Only on PAR­30MAA/F27MEA Remote Controller,
BMS System or Centralised Controller

Check schedule on Controller
and amend if necessary

Target temperature is set incorrectly,
i.e. too low for heating or too high for
cooling

Adjust the target temperature
on the Remote Controller,
BMS System or Centralised
Controller

The operating mode is set incorrectly,
i.e. set on COOL when heating is
required

Select the correct mode for the
conditions on the Remote
Controller, BMS System or
Centralised Controller

Condensate Alarm circuit is open circuit
and air curtain will not COOL or HEAT

Rectify alarm circuit which
must be closed circuit for heat
pump system to operate

Air Curtain filters and/or coil is dirty.

Service air curtain as
described in Section –
Servicing, Pages 31 to 33

Mitsubishi

Electric

system is

indicating an

error code

Error Code 2503 indicating condensate
alarm from condensate pump alarm
system

Inspect air curtain condensate
tray and condensate pump,
service or repair if necessary

A variety of error codes can occur
because of a fault within the air curtain

Refer to Mitsubishi Electric
Service Manual to understand
fault, then inspect and repair
air curtain if there is a fault

If the Heat Pump Air Curtain system is still not operating correctly call for a Mitsubishi
Electric Service Agent.

T9901078-1 UK Page 35 of 36

Warranty

If any problems are encountered with the heat pump warm air curtain please contact
your Mitsubishi Electric Service Agent.

Care has been taken in compiling these instructions to ensure they are correct, although
Thermoscreens Ltd. disclaims all liability for damage resulting from any inaccuracies
and/or deficiencies in this documentation. Thermoscreens Ltd. retain the right to change
the specifications stated in these instructions.

Thermoscreens Ltd
St. Mary’s Road Nuneaton
Warwickshire England
CV11 5AU

Email: [e-mail]
Tel: + 44 (0) 24 7638 4646
Fax: + 44 (0) 24 7638 8578

www.thermoscreens.com

T9901078-1 UK Page 36 of 36

EC DECLARATION OF CONFORMITY

as defined by the EC Council Directive on Machinery 2006/42/EC, the Low Voltage Directive 2006/95/EC,

Electromagnetic Compatibility Directive 2004/108/EC, the Pressure Equipment Directive 97/23/EC

Herewith we declare that the air movement equipment designated below, on the basis of its design and
construction in the form brought onto the market by us in accordance with the relevant safety, health and
performance requirements of the Machinery.

If alterations are made to the machinery without prior consultations with us, this declaration becomes invalid.
Designation of Equipment : THERMOSCREENS HEAT PUMP AIR CURTAINS used with a

MITSUBISHI ELECTRIC CITY MULTI HEAT PUMP SYSTEM
Series Type : VRF HP1000 DXE; VRF HP1000R DXE; VRF HP1500 DXE;

VRF HP1500R DXE; VRF HP2000 DXE; VRF HP2000R DXE

Relevant EC Council the Machinery Directive (2006/42/EC)
Directives : the Low Voltage Directive (2006/95/EC)

the Electromagnetic Compatibility Directive (2004/108/EC)
the Pressure Equipment Directive (97/23/EC)

Applied Harmonised Machinery - EN ISO 14121-1:2007, EN 294:1992, EN 414:2000
Standards : LVD - EN 60335-1:2002, EN 60335-2-30:2003, EN 60335-2-40:2003

EMC - EN 61000-6-1:2007, EN 61000-6-3:2007,

EN 61000-3-2:2006 + A2:2009, EN 61000-3-3:2008

PED - EN 13133:2000, EN 13134:2000
Basis of Self Attestation : Quality Assurance to BS EN ISO 9001 : 2008

B.S.I. Registered Firm Certificate Number FM 85224
SGS Test Report DUR 43908/2/R/RG/05; GL Test Report TR/09/149;
Wemtech Test Report 6619

Responsible Person : Mr. P.Casey, Site Managing Director, Thermoscreens Ltd.
Date : 19th January 2012

Signed :

Thermoscreens Ltd
St. Mary’s Road
Nuneaton
Warwickshire
CV11 5AU
United Kingdom
Telephone: [phone]
Fax: [phone]