Biddle MAT Technical Document

Installation, Operation, and Maintenance
Guide
Cold Store Air Curtain
Model MAT
a
Version of guide: 4.0 R

2
Copyright and trademarks
All the information and drawings in this manual are the property of Biddle and may not be used (other than for the
actual operation of the device), photocopied, duplicated, translated and/or be brought to the attention of third
parties without Biddle’s prior written permission.
The name Biddle is a registered trademark.
Warranty and Liability
Please refer to Biddle’s Terms of Sales and Delivery for warranty and liability conditions.
Biddle excludes liability for consequential loss at all times and under all circumstances.
Liability for the contents of this guide
However much care might have been taken in ensuring the correctness and, where necessary, completeness of the
description of the relevant parts, Biddle disclaims all liability for damage resulting from any inaccuracies and/or
deficiencies in this guide.
Should you detect any errors or ambiguities in this guide then we would be pleased to hear from you: it helps us to
improve our documentation even further.
Biddle retains the right to change the specifications stated in this guide.
For more information
If you have any comments or questions about specific topics relating to this product, please do not hesitate to
contact Biddle.
Biddle bv
P. O. B o x 1 5
NL-9288 ZG Kootstertille
The Netherlands
tel: [phone]
fax: [phone]
e-mail: [e-mail]
internet: www.biddle.info

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE
Version: 4.0 (19-02-2003) 3
. . . Table of contents
1 Introduction 6
1.1 About this guide 6
1.2 How to use this guide 6
1.2.1 For whom is this guide intended? 6
1.2.2 Marginal symbols 7
1.2.3 Pictograms on the device and in the guide 8
1.3 About the MAT air curtain 8
1.3.1 Application 8
1.3.2 Components of the MAT air curtain 9
1.3.3 How does the MAT air curtain work 10
1.4 Safety instructions 12
1.4.1 Using 12
1.4.2 Installing, maintaining, or repairing 12
2 Building the corridor 13
2.1 Introduction 13
2.2 Basic requirements 13
2.2.1 Essential features 13
2.2.2 Essential construction rules 14
2.3 Additional instructions 15
2.3.1 Possible corridor constructions 15
2.3.2 Points of attention 16
3 Installation 17
3.1 Introduction 17
3.2 Before you begin 17
3.3 Mounting the air curtain unit 18
3.3.1 Preparing 18
3.3.2 Suspending 19
3.3.3 Adjusting vertically and securing 19
3.3.4 Adjusting horizontally 20
3.3.5 Finishing the insulation 21
3.4 Installing the control unit 22
3.4.1 Mounting 22
3.4.2 Connecting the control unit to the air curtain unit 22
3.5 Installing the door switch 23
3.5.1 Mounting 23
3.5.2 Connecting 24
3.6 Connecting to the mains 25
3.6.1 Introduction 25
3.6.2 Instructions 25
3.7 Making the MAT air curtain ready for use 26
3.7.1 Initializing and testing the MAT air curtain 26
3.7.2 Adjusting the door switch 26
3.7.3 Settings 27

COLD STORE AIR CURTAIN
4
4 Operation 28
4.1 Introduction 28
4.2 Operation in everyday use 28
4.2.1 Working modes 28
4.2.2 Controlling the working mode manually 29
4.2.3 Verifying the door position 30
4.2.4 Icing indication and alert light 30
4.2.5 Additional indications on the display 31
4.2.6 Faults 31
4.3 Controlling the heating level 32
4.3.1 General 32
4.3.2 Setting the heating level 32
4.3.3 Reading climate conditions 33
4.4 Settings in the advanced menu 34
4.4.1 Introduction 34
4.4.2 Operation 34
4.4.3 Functions in the advanced menu 35
4.5 Settings in the expert menu 36
4.5.1 Introduction 36
4.5.2 Operation 36
4.5.3 Functions in the expert menu 37
5 Adjusting the air curtain 38
5.1 Introduction 38
5.2 General working order 38
5.3 Adjusting the air curtain velocity 38
5.4 Adjusting the heating 39
5.4.1 Adjusting the heating with manual control 39
5.4.2 Adjusting the automatic heating control 39
6 Maintenance 40
6.1 Periodical maintenance 40
6.1.1 Introduction 40
6.1.2 Weekly check-up 40
6.1.3 Three-monthly check-up 41
6.1.4 Yearly maintenance 41
6.2 Access to the interior of the air curtain unit 42
6.2.1 Access to the electronics compartment 42
6.2.2 Access to the A section 42
6.2.3 Access to the B section 42
6.2.4 Access to the C section 43
6.3 Access to the fuses 43
7 Troubleshooting 44
7.1 Introduction 44
7.2 What to do if you found a problem 44
7.3 Unexpected behaviour 45
7.4 Undesired side effects 47

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7.5 Fault messages 48
7.5.1 Display of fault messages 48
7.5.2 Resetting faults 48
7.5.3 What to do if there is a fault 48
7.5.4 Fault codes 49
Index 54
EC declaration of agreement 56

INTRODUCTION COLD STORE AIR CURTAIN
6
1. . Introduction
1.1 About this guide
This guide describes the installation, operation, and
maintenance of the MAT cold store air curtain.
This document contains important instructions in order to
ensure that the device works safely, correctly, and effectively.
For that reason, please read through this guide thoroughly
before carrying out any action with the device. Familiarise
yourself with it and follow the instructions carefully.
1.2 How to use this guide
1.2.1 For whom is this guide intended?
This guide is intended for those involved in the installation, the
operation, or the maintenance of a MAT air curtain. Table 1-1
gives a recommendation of which parts you should read at
least.
Note:
nUnderstanding the basic working principles of the MAT air
curtain is essential for correctly installing, operating and
maintaining the device.
All readers should at least read section 1.3 ’About the
MAT air curtain’ first.
Table 1-1 Reading recommendation
IFYOU ARE GOING TO... ... YOU SHOULD READ THIS
build and/or apply the insulation to the corri-
dor
• Chapter 1 ’Introduction’
• Chapter 2 ’Building the corridor’
• dimension sketch of corridor (provided separately)
carry out the installation this entire guide
connect the device to the mains • Section 3.6 ’Connecting to the mains’
do the technical management of the device in
the cold store
• Chapter 1 ’Introduction’
• Chapter 4’Operation’
• Chapter 5 ’Adjusting the air curtain’
• Chapter 7 ’Troubleshooting’

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE INTRODUCTION
Version: 4.0 (19-02-2003) 7
If you are unfamiliar with the MAT air curtain then read the
chapters in sequence.
If you are familiar with the device then you may use this guide
as a reference. You can use the Table of Contents and the
Index to find information.
1.2.2 Marginal symbols
In this guide the following marginal symbols are used:
Note:
nDraws your attention to an important part of the text.
Read this part of the text carefully.
Caution:
cIf you do not perform this procedure or action correctly you
can damage the device.
So follow the instructions carefully.
Warning:
wIf you do not perform this procedure or action
correctly you can cause bodily injury and/or damage.
So follow the instructions carefully.
Danger:
dThis indicates actions which are not permitted.
Ignoring this warning can lead to serious damage or
accidents which may involve bodily injury.
The action concerned may only be performed by
qualified technical staff when carrying out
maintenance or repair.
use the cold store door in everyday work at
the cold store
•Section4.2 ’Operation in everyday use’
carry out periodical maintenance • Chapter 1 ’Introduction’
• Chapter 6’Maintenance’
• Chapter 7 ’Troubleshooting’
carry out repair • this entire guide
• wiring diagram
Table 1-1 Reading recommendation
IFYOU ARE GOING TO... ... YOU SHOULD READ THIS

INTRODUCTION COLD STORE AIR CURTAIN
8
1.2.3 Pictograms on the device and in the guide
The pictograms in Table 1-2 refer to possible risks and/or
dangers. You will find these pictograms in the text when risky
actions are being discussed. The same pictograms will also be
found on the device.
1.3 About the MAT air curtain
1.3.1 Application
The MAT cold store air curtain separates the climates of the
cold store and the front hall in order to:
- save energy,
- improve maintenance of temperature in the cold store,
- prevent mist and precipitation of ice in the cold store,
without physical or visual obstruction of the doorway.
A MAT air curtain works in cooperation with a common cold
store door. It is in effect while the door is open.
The MAT air curtain is intended for this application exclu-
sively. Biddle recommends against any other use.
Table 1-2 Pictograms
PICTOGRAM DESCRIPTION
WARNING: You are entering an area which contains ‘live’ components.
Accessible to qualified maintenance staff only.
Caution is urged.
WARNING: This surface or part can be hot. There is a risk of burns on
contact.
ê
ç

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE INTRODUCTION
Version: 4.0 (19-02-2003) 9
1.3.2 Components of the MAT air curtain
A MAT air curtain is built up around a cold store door. It is
always situated in the front hall, at the outside of the cold
store.
A MAT air curtain consists of several standard components,
which are included in the delivery: they are explained in Fig-
ure 1-1.
An essential part is the corridor, a special structure that is not
included in the delivery, but built on location. Its purpose is
explained in section 1.3.3.
Figure 1-1 A typical MAT air curtain and its components
protection bara)
ll
corridor frame
the primary unit has 1 or 2
alert lights
primary air curtain unit
(always applied)
secondary air curtain unit
(additionally applied with wider doors)
corridor insulation structure cold store door door switch
controls the
working mode
control panel
control unit
a) The protection bar is recom-
mended to guard against collisions
with transport vehicles. It may be
mounted in a later stage to facili-
tate the mounting of the air cur-
tain units.
display

INTRODUCTION COLD STORE AIR CURTAIN
10
Note:
nThe MAT air curtain shown in the figures in this guide is an
example. There may be only one air curtain unit in your
MAT air curtain. Also, the size(s) of the air curtain unit(s)
may be different to suit the width of the cold store door.
However, the procedures are similar, unless specified
otherwise.
1.3.3 How does the MAT air curtain work
General
The MAT air curtain unit generates a constant, vertical air
stream, throughout the width of the doorway. It works as a
barrier between the climates of the cold store and the front
hall. By this, the exchange of heat and moisture is reduced.
Note:
nClimate separation is not in effect, when the air curtain
stream is disturbed.1) Therefore:
- All obstacles in the air curtain stream must be avoided:
even small irregularities may cause turbulence, and by
this, disturb effective working.
- All inlets and outlets must be kept free entirely.
- The doorway must be entirely open.
Principle of the MAT air curtain
MAT stands for ‘Multi Airstream Technology’. According to this
principle, the stream generated by a MAT air curtain consists
of three layers, as shown in Figure 1-2:
- stream A is extracted from the front hall, and dis-
charged unheated,
- stream B is extracted from the cold store, and heated
before discharge,
- stream C is extracted from the cold store, and dis-
charged unheated.
The streams are discharged at the same speed, and combined
in a rectifier grille. By this, turbulence is avoided, and mixing of
air between the streams is strongly reduced.
1) The air curtain stream is actually disturbed during the passage of a person or vehicle. However, it restores itself in seconds, as soon as the
person or vehicle has passed.
C + B
A
CAB
Figure 1-2 MAT working principle

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE INTRODUCTION
Version: 4.0 (19-02-2003) 11
Purpose of the heating
By the heating of stream B, its relative humidity is reduced:
this prevents the development of mist in the air curtain.
To save energy, the heating level should be as low as possible.
The minimum required level depends on the climate condi-
tions in the cold store and the front hall. If your MAT air cur-
tain has a humidity sensor (optional), it can set the heating
temperature automatically.
Purpose of the corridor
The corridor is essential for the working of the MAT air cur-
tain.
While the cold store door is closed (Figure 1-3, above), it sep-
arates the climates of the cold store and the front hall. When
it is opened, the MAT air curtain becomes the effective separa-
tion instead (Figure 1-3, below). The corridor is then neces-
sary:
• to keep both climates separate, there where they are not
separated by the air curtain,
• to lead the air from the cold store into the air curtain unit
and back without disturbance.
Note:
nEven small openings disturb the working of the air curtain,
making it ineffective. Therefore:
- the corridor must be free of air leaks at all places,
- the corridor must fit narrowly to the air curtain unit.
Note:
nWhile the MAT air curtain is in effect, the walls of the cor-
ridor separate the air that is lead from the cold store, from
the warm and humid air in the front hall. Therefore:
- the corridor must be thermally insulated at all places,
- cold bridges must be avoided.
Otherwise, undesired precipitation of water and/or ice will
occur on the outside, which may cause unhygienic situa-
tions.
Separation between the climates while the
door is closed.
Separation between the climates by the MAT
air curtain, while the door is open.
Figure 1-3 Working principle
of the corridor
cold store climate
front hall climate

INTRODUCTION COLD STORE AIR CURTAIN
12
1.4 Safety instructions
1.4.1 Using
Warning:
wHigh temperatures
Do not block the inlets and outlets of the air cur-
tain unit.
The upper surface of the air curtain unit can
become very hot: do not put inflammable objects
on it.
Danger:
dHigh voltages
The air curtain unit is not water proof: do not spray
water on it.
1.4.2 Installing, maintaining, or repairing
Danger:
dHigh temperatures
High voltages
Do not attempt to carry out installation, mainte-
nance, or repair, unless you are technically quali-
fied.
Warning:
wBefore accessing the interior of the air curtain unit:
1. Set the insulation switch which is located on top of the
unit in position “0” (off).
2. Wait until the fans have stopped.
3. Allow the unit to cool down before you start to work near
the heating elements.
4. If you are going to access the electronics compartment,
switch off the mains power supply also.
ç
ê

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE BUILDING THE CORRIDOR
Version: 4.0 (19-02-2003) 13
2. . Building the corridor
2.1 Introduction
This chapter contains instructions for building the insulation of
the corridor.
At this stage, the corridor frame is supposed to be built and
ready, as shown in Figure 2-1.
Note:
nThe required dimensions of the corridor depend on the
individual situation. They are shown on the dimension
sketch, that is provided separately.
2.2 Basic requirements
2.2.1 Essential features
An example of a corridor is shown in Figure 2-2. Its essential
features are:
•thecorridorframe1, which carries the corridor, and the
air curtain unit(s) (to be installed later)
• two thermally insulating side panels 2, narrowly enclosing
the air curtain unit(s),
• an entirely closed thermally insulating structure 3
between the air curtain unit(s) and the side panels on one
side, and the cold store door opening on the other side.
Figure 2-1 Example of a corridor frame
1
Figure 2-2 Example of a corridor, built
around the frame and the cold store door
2
2
3

BUILDING THE CORRIDOR COLD STORE AIR CURTAIN
14
2.2.2 Essential construction rules
The construction of the corridor is critical for the correct
working of the MAT air curtain. The rules in this section must
be followed carefully.
Rules on geometry
1. The entire corridor must be free of air leaks at all places.
Even small holes or gaps letting air trough will disturb the
working.
2. The side panels must fit narrowly to the air curtain unit.
3. The surface of the side panels must be smooth. Even small
irregularities will disturb the working.
Caution:
cFollow these rules strictly. Otherwise:
- there will be no effective climate separation, making the
MAT air curtain useless,
- side effects, like mist and precipitation of water and ice,
may occur, causing unhygienic, and possibly dangerous
situations.
Rules on materials
4. The corridor must be thermally insulated at all places.
5. Cold bridges must be avoided.
Caution:
cDo not leave any part without insulation.
Otherwise, precipitation of ice and water will occur on the
outside, causing unhygienic situations.

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE BUILDING THE CORRIDOR
Version: 4.0 (19-02-2003) 15
2.3 Additional instructions
2.3.1 Possible corridor constructions
Depending on the situation in the cold store, the following
principles for the corridor are possible:
1. With the door inside the cold store: the corridor fits directly
to the door opening. (preferable)
2. With the door outside the cold store: the corridor is built
entirely surrounding the door. (preferable)
To enable access to the door mechanism for maintenance,
parts of the corridor structure should be made remova-
ble, or enough space should be left between the corridor
structure and the door.
3. With the door outside the cold store: the corridor fits to the
door. (not preferable)
All gaps between the opened door and the corridor must
be sealed with a flexible material, like PVC sheet.
1. example of corridor fitting to the door
opening (door inside)
2. example of corridor surrounding the door
(outside)
3. example of corridor fitting to the door, using flexible sheet
material (door outside)

BUILDING THE CORRIDOR COLD STORE AIR CURTAIN
16
2.3.2 Points of attention
Note:
nWhen building the corridor, pay special attention to the
following:
• Attach the side panels 1 inside the frame as shown in the
pictures, not outside.
• Seal gaps between insulating elements.
• Also close the space 2above the door opening, between
the wall and the air curtain unit.
• Leave the space for the inlet 3at the back side of the air
curtain unit free: it must be entirely inside the corridor.
• If you use a flexible material to seal the gap 4near the
door, also close the gap 5around the door guiding rail.
• The housing of the air curtain unit 6is thermally insu-
lated itself. If it fits narrowly to the corridor, it is not nec-
essary to apply insulating material there.
• Leave some space 7above the air curtain unit(s) free: it
will be needed to enable access for maintenance.
5
4
11
2
3
7
7
6

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Version: 4.0 (19-02-2003) 17
3. . Installation
3.1 Introduction
This chapter describes how to mount the components of the
MAT air curtain, how to connect them, and how to make the
device ready for use.
At this stage, the corridor is supposed to be ready.
Danger:
dDo not attempt to carry out the installation, unless
you are a qualified installation technician.
3.2 Before you begin
• On delivery, check the components of the MAT air curtain
and their packaging. Report any transport damage to the
supplier immediately.
• Make sure that all components and accompanying parts
have been supplied.
• A lifting device, e.g. a lifting platform, or a fork lift truck, is
necessary to carry out the installation.
Warning:
wRead the safety instructions in Section
1.4 on page 12.

INSTALLATION COLD STORE AIR CURTAIN
18
3.3 Mounting the air curtain unit
If there are two air curtain units
The primary unit may be placed either on the left side or on
the right side. However, take into consideration the place-
ment of the control unit (see Section 3.4.1).
Follow the instructions in this section for each unit.
3.3.1 Preparing
1. Remove the package material from the unit, but leave the
unit itself on the pallet.
2. Screw a thread rod 1into each of the 4 rivet holes 2on
top of the unit, approximately 3 cm deep.
3. Secure each thread rod with a counter nut 3. Fasten them
tightly.
Warning:
wThe thread rods must be secured.
If the pallet is too wide
If the pallet does not fit between the corridor walls, you can
Interchange the pallet for a smaller one, as follows:
1. Place the suspension frame 4onto the thread rods.
2. Fix the suspension frame onto each thread rod with a
nut 5.
3. Lift the unit by the suspension frame, using a fork lift
truck.
4. Interchange the pallets.
5. Lower the unit onto the pallet.
6. Dismount the suspension frame.
2
3
1
Figure 3-1 Attaching the thread rods
to the air curtain unit
Figure 3-2 Lifting the air curtain unit to inter-
change pallets
45

INSTALLATION, OPERATION, AND MAINTENANCE GUIDE INSTALLATION
Version: 4.0 (19-02-2003) 19
3.3.2 Suspending
1. Lift the unit by its pallet, and place it approximately into its
final position, according to Figure 3-3. Use a lifting device.
2. Place the suspension frame 4onto the thread rods, over
the horizontal bars of the corridor frame.
3. Fix the suspension frame, by applying a nut 5on each
thread rod.
4. Take the lifting device with the pallet away. The unit should
now be hanging freely.
3.3.3 Adjusting vertically and securing
1. Adjust the vertical position of the unit with the nuts 5,
according to Figure 3-5.
Caution:
cThe unit must be suspended level.
2. Secure the nuts by applying a counter nut 6on each
thread. (Figure 3-4)
Warning:
wThe nuts on the thread rods must be secured.
3. Saw off the superfluous parts 7of the thread rods. (Fig-
ure 3-4) Leave approximately 10 cm.
Figure 3-3 Suspending the air curtain unit to the corridor frame
4
5
6
7
Figure 3-4 Finishing the suspension

INSTALLATION COLD STORE AIR CURTAIN
20
3.3.4 Adjusting horizontally
• Place the unit into exact position, according to Figures 3-5
and 3-6, by moving it by its suspension frame over the
horizontal bars of the corridor frame.
Warning:
wMake sure that it is impossible to move the suspen-
sion frame off the corridor frame in any way.
Attach them to each other if necessary
If there are two air curtain units
• Position the units with their sides against each other,
according to Figure 3-6.
Caution:
cDo not leave any space between the air curtain units, nor
between the air units and the corridor.
Otherwise, the MAT air curtain will not work effectively,
and undesired effects like mist and icing will occur.
Figure 3-5 Correct horizontal and
vertical placement of air curtain unit
Figure 3-6 Correct placement of two air curtain units