Reznor AB-2 Series Supplement

MANUAL PART NO. D301291
INSTALLATION & SERVICE MANUAL
AB-2 INDUSTRIAL
AIR CURTAIN RANGE
AMBIENT, ELECTRIC & LPHW MODELS
Please read this document carefully before commencing installation, commissioning and/or servicing.
Leave it with the end user/site agent to be placed in their premises technical file after installation.
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
All work must be carried out by appropriately qualified persons.
The manufacturer does not take any responsibility in the event of non-observance of the regulations concerning the connection of
the apparatus causing a dangerous operation possibly resulting in damage to the apparatus and/or environment in which the unit is
installed.
EN ISO 12100:2010 Safety of machinery.
EN 60204-1:2018 Safety of machinery. Electrical equipment of machines.
EN 55014-1:2017 Electromagnetic compatibility.
EN 60335-2-30:2009+A11:2012 Safety. Requirements for room heaters to the following
European CE directives- 2006/95/EC - low voltage; 2014/35/EU - Electromagnetic compatibility

Page 2 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
Document Index
GENERAL INFORMATION ...................................... ..3
SECTION 1 – TECHNICAL INFORMATION.............. ..4
SECTION 2 – DIMENSIONS .................................... ..4
2.1 Weights ............................................................. ..4
SECTION 3 – INSTALLATION DETAILS ................... 4
3.1 Health and safety............................................... ..4
3.2 Single module.................................................... ..5
3.3 Multiple modules............................................... ..5
3.4 Mounting .......................................................... ..5
3.5 LPHW models only............................................. ..6
SECTION 4 – WIRING DETAILS ................................ 7
4.1 Control panel .................................................... .7
SECTION 5 – SERVICING ........................................ ..7
5.1 Tools required .................................................... ..7
5.2 Air outlet louvres ............................................... ..7
5.3 Air distribution fans ........................................... ..7
5.4 Elements............................................................ ..7
5.5 Electrical...............................................................7
SECTION 6 – PARTS REPLACEMENT...................... ..7
6.1 Tools required .................................................... ..7
6.2 Air distribution fans ........................................... ..7
6.2.1 Fan closure plate...................................... ..8
6.2.2 Fan removal............................................. ..8
6.3 Heating element removal................................... ..9
SECTION 7 – SPARE PARTS .................................... 10
SECTION 8 – FAULT FINDING................................. 10
SECTION 9 – USER INSTRUCTIONS ....................... 11
9.1 Important information ....................................... 11
9.2 Control panel..................................................... 11
9.3 To start the AB air curtain................................... 11
Sample wiring diagrams........................................... 12

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 3
General Information
Welcome to the AB-2 air curtain range. There are 3
variants within the range, Ambient (unheated), Electric
heated & LPHW. With two sizes - 175 & 225.
Local regulations may vary in the country of use and it is
the installers responsibility to ensure that such regulations
are satisfied.
All installation, assembly, commissioning and service
procedures must be carried out by suitably qualified
competent persons to the statutory regulations in the
country of use.
When assembling, installing, commissioning and servicing
is undertaken on the air curtains please ensure that
working at height regulations are adhered to at the
mounting heights specified.
All dimensions shown are in mm unless otherwise stated.
The manufacturer reserves the right to alter specifications
without prior notice.
PLEASE READ this document prior to
installation to familiarise yourself with the
components and tools you require at the various
stages.
This manual provides detailed information on the
installation of AB-2 air curtains. It is essential that
these products are installed in accordance with these
manufacturers instructions.
UNDER NO CIRCUMSTANCES MAKE
MODIFICATIONS TO THE MACHINE AND
IT’S INTENDED USE.
The manufacturer declines all responsibility for any
damages which may be, directly or indirectly, caused
to exposed persons or property, due to improper use
or use of the machine for different purposes other
than the design purposes, incorrect installation,
inappropriate power supply, different or changes to the
installation environment from the one declared during
order confirmation, grave deficiency of maintenance,
unauthorized alterations and modifications, use of non-
original spare parts, removal of the protection guards,
ignoring the instructions for use, negligence, etc.
The primary reason for installing an air curtain is to
prevent the influx of cold outside air through a door
opening into a heated area. Typical applications
include large despatch bay doors in factories and
warehouses, and internal doors between areas of
different temperatures. Wider door openings can be
accommodated by bolting two or more units together.
Air curtains control the internal climate by emitting an
air stream with enough velocity to meet the floor so
creating an air barrier in the door area. To prevent the
ingress of outside draughts, the discharge louvre is angled
outwards, so that the air leaving the building meets the
wind trying to enter, thus deflecting it. (See diagrams
below).
AB air curtains provide uniform air distribution across the
full width of the door, keeping heated or conditioned air
inside the building and stopping the ingress of cold air,
draughts and dust.
Without an air curtain
With an air curtain
Pattern of airflow
InsideOutside
Air intake

Page 4 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
Model AB175-2 AB225-2
Air distribution fans
Type Centrifugal c/w thermal trip
Speeds 3 3
No of fans 3 4
Max air volume (ambient only) 9,600m3/h 12,800m3/h
Electrical supply ambient &
LPHW models* 230V 1 Phase 50Hz
Current per fan (FLC) 5.2 A 5.2 A
Starting current per fan 12 A 12 A
*When multiple modules are used for a single door, a 3 phase supply
is required
Electric Heated models only
Elements 18 kW 24 kW
Electrical supply 415V 3 Phase 50Hz
Total power consumption 21.42 kW 30.56 kW
Max air volume 9,600m3/h 12,800m3/h
Temp rise - High speed 9.7OC 7.28OC
Temp rise - Low speed 13.86OC 10.39OC
LPHW models only
Coil rating 53 kW 63 kW
Water pressure drop thru coil 12 kpa 15 kpa
Water flow 1.18 l/s 1.4 l/s
Water capacity 3.5 Litres 4.5 Litres
Max water operating pressure 15 bar 15 bar
Max air volume 7,560m3/h 9,400m3/h
Temp rise - High speed* 20OC 20OC
Temp rise - Low speed* 29OC 29OC
*Based upon LPHW flow temp of 82OC, return 71OC
WARNING: This air curtain should not be
installed within a corrosive atmosphere.
2.1 Weights
Model Ambient Electric LPHW
Dry Wet
175 92kg 105kg 134kg 139kg
225 114kg 130kg 162kg 167kg
All weights are approximate
1. Technical information
* Only Electric &
LPHW models
260
Plan view
Front view
End view
758*
100
516
AB175 = 1695, AB225 = 2195
LPHW Coil Centres
AB175 = 1750, AB225 = 2250
28 86
2. Dimensions (mm)
456

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 5
3. Installation details.
3.1 Health and Safety.
Due account should be taken of any obligations arising
from the national Health and Safety legilastion or relevant
codes of practice. In addition the installation must be
carried out in accordance with the current IEE wiring
regulations and any other relevant national Standards
and Codes of Practice by a qualified installer. Isolate all
electrical supplies to the heater & control panel before
proceeding.
For your own safety we recommend the use of personal
protective equipment when handling this air curtain. AB
air curtains are supplied with mounting brackets pre-
fitted, and can be mounted either as single units, or in
multiples, which can be bolted together to suit various
door widths.
The minimum mounting height is 3m (See diagram 2).
3.2 Single module
Each single air curtain should be supported by cantilever
brackets (not supplied) then fixed back to the building
structure by bolting directly using suitable support
brackets, or by suspending from above using suitable
steelwork. (See diagram 3, page 6).
3.3 Multiple modules
Multiple air curtains should be bolted together using 3
off M10 set pins, nuts and washers fitted through the
holes provided in the mounting brackets, then suitable
support channels (not supplied) must be fixed on top of
the factory fitted brackets along the full length of the
assembled air curtains to spread the load.
The assembly can now be fixed back to the building
structure by bolting directly using suitable support
brackets, or suspending from above using steelwork. (See
diagram 4 page 6).
If required, the support channel may be extended slightly
past the ends of the air curtains to aid fixing.
Note: Where multiple air curtains are fitted
above up and over doors or where central
support is inappropriate, the support channel
should be replaced with channels of a greater
cross section to prevent the assembly from
bending.
It may be necessary to adjust the position of the air
outlet louvres to provide the correct airflow across the
door opening. This can be done by first loosening the
four locking pins located two at each end of the louvres
(arrowed, Fig. A), then loosening the intermediate locking
Allen pins (arrowed, Fig. B). The louvres can now be
moved to the desired position and the locking pins re-
tightened.
Note: The AB 225 model has two pairs of
intermediate locking Allen pins, whereas the AB
175 model only has one pair.
3.4 Mounting
Gap to be kept
to a minimum
Bottom of air
curtain to be
level with top of
door opening
3m minimum
Diagram 2.
Fig A
Locking Pins
Fig B
Locking Allen Pins

Page 6 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
Diagram 3. Mounting method (single module)
Front View (Single module)
Cantilever brackets
(not supplied)
Factory fitted
mounting brackets
Diagram 4. Support channel (multiple modules)
Plan View (Twin modules)
Support points
Module 1 Module 2
Typical support channels Factory fitted brackets
WARNING: This air curtain should not be
installed within a corrosive atmosphere.
3.5 LPHW models only.
Each AB module is fitted with a 1¼” (BSP) flow and return
connection. When more than one module is used, size of
the common pipework is to be calculated by the installer
using the flow information shown within technical data
on page 4.
Use of an isolation valve in the pipework for each
coil connection, is highly recommended.
The image on the right illustrates a typical
installation using two AB-2 modules. Note: Each water coil is fitted with a 1/8” drain point
located below either the flow or return connection
Coils are not handed, so flow/return
can be on either coil connection per
module

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 7
4. Wiring details
4.1 Control panel
The panel incorporates an on/off selector switch, a high/
low fan speed selector switch, and a heat on/off selector
switch.
Panel operation is described in section 9 of this manual
(user instructions).
A customer specific control panel wiring diagram
will be supplied within each air curtain control
panel. However sample diagrams are shown at
the rear of this manual
5. Servicing
These appliances should be serviced annually by a
competent person to ensure safe and efficient operation.
In exceptionally dusty or polluted conditions more
frequent servicing may be required.
Isolate electricity supplies before commencing any work.
5.1 Tools required
The following tools and equipment are recommended to
complete the tasks laid out in this manual.
5.2 Air outlet louvres.
The air outlet louvres should be cleaned with a soft brush.
Check that the louvres are set to the required angle. (See
Figs. A/B on page 5 for setting procedure).
5.3 Air distribution fans.
The air distribution fans can be accessed by opening the
fan access lid as described in section 7.1 Fig.2.
Clean off any dust or deposits with a soft brush paying
particular attention to the impeller. Check that the
impeller spins freely, and that there is no play in the fan
bearings.
The fan(s) can be removed, if necessary, as described in
section 6.2.
5.4 Elements
Remove element housing as described in section 6.3
(parts replacement). Clean off any dust or deposits with a
soft brush.
Visually inspect element coils for signs of discolouration,
burning, sagging etc.
5.5 Electrical.
Isolate electricity supplies before commencing
any work.
Check condition and tightness of all terminations in
control panel.
Remove the fan/elements terminal box cover located on
top of the air curtain (Fig.1), and repeat above procedure
for the fan/elements terminations.
Check that the plug/socket connection to each fan (inside
the unit) is tight and that the cable is in good condition.
Switch control panel on and check air curtain operation
in each selector switch position (heat on/off, low//high
speed).
6. Parts replacement
All servicing/maintenance work on this air curtain
should be carried out by suitably qualified
person. Before commencing any work please
ensure that the electricity supplies are turned off.
6.1 Tools required.
6.2 Air distribution fans.
The air distribution fans can be accessed by removing the
three screws along the bottom edge of the air inlet grille
(Fig.2), and the retaining screws securing the hinged lid
on the underside of the air curtain next to the louvres
(Fig.3).
Adjustable
spanner
Cross point
screwdriver
Small
flat head
screwdriver
Allen key
set
Soft
brush
10mm &
13mm
Spanners
Fig 1
Adjustable
spanner
Cross point
screwdriver
10mm &
13mm
Spanners
Allen key
set

Page 8 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
The lid can now be hinged down to access the fans as
shown in Fig.4.
6.2.1 Fan closure plate
Before individual fans can be removed it will be necessary
to remove the fan closure plate. Remove the retaining
screws around the perimeter of the plate. (See Figs.5/6)
The plate can now be removed.
6.2.2 Fan removal
Identify the feed cable for the fan requiring removal and
disconnect it from its cable mounted plug/socket. (See
Fig.7)
The four bolts securing the fan can now be removed as
shown in Fig.8, and the fan removed from the air curtain
downwards.
CAUTION: These fan units are heavy.
Fig 3
Fig 4
Fig 5
Fan outlet
Fan closure plate
Fan outlet
Fan closure plate
Fig 6
Fig 7
Fig 8
Fig 2

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 9
Fig. 9 Shows single air distribution fan inisolation for
clarity.
6.3 Heating element removal (see Diagram 7)
To gain access to the elements first remove the 9 screws
(A) retaining the element housing.
Remove the 2 screws (B) retaining the top element plate
ends.
Remove the 3 screws (C) retaining the top rail of the
element assembly.
The element assembly can now be tilted forward slightly
and lifted from the 3 retaining tab slots (D).
See diagram 8.
The wiring to the element assembly can now be accessed
at the rear of panel (E), and disconnected after first noting
the cable positions.
Finally disconnect the two female spade connectors from
the overheat thermostat (F). The element assembly can
now be withdrawn from the air curtain.
Refitting a new element assembly is the reverse of the
above procedure.
Fig 9
Blanking Plate
Diagram 7
Diagram 8

Page 10 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
7. Spare parts
Item Description Part No
3 speed air
distribution fan
unit
AB-FAN
AB 225E 24kW
elements
(full set)
100528
Thermal cutout
(1 per module
fitted with
electric element)
900001
Air distribution
fan 5 pin plug/
socket
Plug: 3127
Socket: 3126
AB 175E 18kW
elements (full set) 100527
8. Fault finding
Air distribution fans
Elements - Electric Heat Models
* If it is determined that the overheat thermostat has
tripped it will be necessary to remove the blanking plug
located on the top face of the element housing to enable
resetting. (See Diagram 7 in section 6 of this manual).
This MUST be done with the electrical supply to the air
curtain turned OFF.
Power on to
panel?
NO Check:
1. Power supply
YES
All air
distribution
fans off?
Check:
1. Control panel man/off/
auto switch position
2. Fan circuit breaker(s)
3. Fan contactor and
associated wiring.
YES
Single fan
unit off?
YES
Check:
1. Motor thermal trip(may
run when cool), test
motor.
2. Motor wiring.
3. Motor plug/socket.
If the fan(s) still fail to
operate normally, please
contact your supplier.
NO
YES
YES
Power on to
panel?
NO Check:
1. Power supply
No heat?
Check:
1. Control panel heat on/
off switch position.
2. Element circuit breaker(s)
3. Overheat thermostat.
Low heat?
Check:
Current load on all
elements. Should be
balanced. If not element(s)
could be open circuit
If the element(s) still fail to
operate normally, please
contact your supplier.
NO

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 11
9. User instructions
9.1 Important information
This appliance must only be installed by a competent
person in accordance with the requirements of the codes
of practice and the rules in force in the country of use.
The appliance must be earthed.
Never rest anything, especially ladders, against the air
curtain.
9.2 Control panel
Appearance and function of the control panel will vary
depending upon the size and model of air curtain. The
image below illustrates a typical control panel for ambient
& LPHW models
Ambient & LPHW Models
Auto/Off/Man - In auto position the unit will operate via
a door interlocked switch (by others) i.e when the door
opens the air curtain will work, when the door closes
the air curtain will stop. Man position will cause the air
curtain to operate continuously. Off will prevent the air
curtain from operating.
Fan speed selector - This allows the user to select the
speed of the air leaving the unit depending upon external
conditions or individual preference
Electric heated models
On/Off switches the system on or off.
Heat on/off enables the system to run in fan only or
heated mode.
An optional room thermostat may be wired into the
control panel, this will allow the air curtain to operate as a
heater on low fan speed, providing the heat on/off & on/
off switches are set to ‘on’.
A door interlock switch (by others) will automate the
operation of the air curtain on high fan speed, each time
the door is opened providing the heat on/off & on/off
switches are set to ‘on’.
9.3 To start the AB air curtain
• Rotate the control panel on/off (auto/off/man)
selector switch to the ‘on’ position.
• Rotate the fan speed selector switch (if fitted) to the
desired position.
• Rotate the heat on/off selector switch (if fitted) to the
desired position.
• Switch on electrical supply to the control panel. The
panel live lamp will illuminate, the air distribution fans
will start and, if selected (or fitted), heating elements
will be on.
To start the AB air curtain (BMS control, if specified)
• Rotate the control panel on/off (auto/off/man)
selector switch to the ‘on’ position.
• Rotate the fan speed selector switch (if fitted) to the
desired position.
• Rotate the heat on/off selector switch to the desired
position (if fitted).
• Switch on electrical supply to the control panel. The
panel live lamp will illuminate and the unit will now
only operate when the BMS relay or remote switch is
closed.
• To switch off the AB air curtain
• Rotate the on/off (auto/off/man) control panel
selector switch to the ‘off’ position.
Servicing
To ensure continued efficient and safe operation it is
recommended that the air curtain is serviced regularly
by a competent person, once a year in normal working
conditions, but in exceptionally dusty or polluted
conditions more frequent servicing may be required.
WARNING: This air curtain should not be
installed within a corrosive atmosphere.
Isolator
Power on
indicator
Auto/Off/Man
selector
Fan speed
selector

Page 12 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
Sample wiring diagrams
Please note the following wiring diagrams are supplied as a guide only. Wiring diagrams supplied with the control
panel MUST be followed as they may included specific control functions/features..
Ambient & LPHW single module
APPROVED
CHECKED
DATE
DRAWN
TITLE
CLIENT DRAWING No
REVISION 2
JOB No
SHEET
REV DATE DESCRIPTION
SH
12/09/12
JC CP-AB-AMB-SINGLE R2
STANDARD
1 of 1
STANDARD
LOW SPEED HIGH SPEED
MEDIUM SPEED CA
CONTACTOR
PANEL LIVE
4
DOOR INTERLOCK MAKES AS DOOR OPENS
L1
N E
230 VOLT 1 PHASE 50 Hz
SUPPLY
DOOR LOCKED ISOLATOR
1 4
CA
5 6
4
789
10
11
12
AUTO OFF MAN
MCB2 4A
CONTROL PANEL TERMINALS
PRE-WIRED FAN MOTORS
LAST WIRE No 12
MCB1 25A
FAN MODULE
TERMINAL BOX
1.75M 2.25M
AB175 AB225
DOOR WIDTH
AIRBLOC
MODEL
No OF MODULES
AB175 AB225
1 -
- 1
MOTOR LEAD COLOURS RED LOW SPEED WHITE NEUTRAL BLACK HIGH SPEED BLUE MEDIUM SPEED
12 3
NE
Wiring Colour Scheme
Phases..............: Black
Control 230V.....: Red
Neutral...............: Light Blue
24 VAC...............: Violet 24 VAC Ground.: White 24 VDC...............: Dark Blue
0-10 VDC............: Orange
Analogue Inputs: Grey
FAN
CUSTOMER SUPPLIED
4 CORE CABLE
1 GANG 3 POSITION
= WHERE
SINGLE FAN MODULE
*
*APPLICABLE
SELECTOR SWITCH
SINGLE MOTOR FLC 5.2A
TOTAL No
OF FANS
3 4
SPARE Nos. 2 & 3
SCHEMATIC WIRING DIAGRAM FOR AMBIENT SINGLE MODULE DOOR
CURTAINS 230v 1PH+N SUPPLY
13
REMOVE LINK FOR BMS CONTROL
1 22/12/15 MAINS ISOLATOR SWITCHED NEUTRAL
25A
2 23/03/18 MCB AND CONTACTOR CHANGED

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 13
Sample wiring diagrams
Please note the following wiring diagrams are supplied as a guide only. Wiring diagrams supplied with the control
panel MUST be followed as they may included specific control functions/features..
CB
15
16
17 18
CC1 CC2
CONTACTOR
PANEL LIVE
4
L1 L2 L3
N E
415 VOLT 3 PHASE 50 Hz 4 WIRE SUPPLY
DOOR LOCKED ISOLATOR
1 2 3 4
4A
CA
ROOM THERMOSTAT BREAKS ON RISING TEMP
4
CC2
AB225 MODULE
ON/OFF SWITCH
2.5mm2
2.5mm2
40A
5 6 7
8 9 10 11 12 13
CA
14
19
21
23
24
HEATING
MCB1
MCB3
22
CB
19
20
DOOR
INTERLOCK
MAKES AS DOOR
OPENS
10.0mm2
4.0mm2
CB
HEAT ON/OFF SWITCH
19
FAN
CONTACTOR
(LINK IF NOT REQD)
21
25A MCB2
14
4
LINK (REMOVE
FOR REMOTE
ENABLE)
DR
DR/1
DOOR RELAY
THERMAL CUTOUT
CC1
LOW
SPEED
CONTACTOR
DR/2
25
HIGH
SPEED
CONTACTOR
25A 25A 25A
APPROVED
CHECKED
DATE
DRAWN
TITLE
CLIENT DRAWING No
REVISION 2
JOB No
SHEET
REV DATE DESCRIPTION
SH
13/03/14
JC CP-AB-ELEC-SINGLE-24 R2
1 of 2
SCHEMATIC WIRING DIAGRAM 2 SPEED
ELECTRICALLY HEATED SINGLE MODULE DOOR CURTAINS 24kW
STANDARD
Wiring Colour Scheme
Phases..............: Black
Control 230V.....: Red
Neutral...............: Light Blue
24 VAC...............: Violet 24 VAC Ground.: White 24 VDC...............: Dark Blue
0-10 VDC............: Orange
Analogue Inputs: Grey
122/12/15 MAINS ISOLATOR SWITCHED NEUTRAL
202/02/18 MCBS/CONTACTORS UPRATED
Electric heat single module

Page 14 Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291
Sample wiring diagrams
Please note the following wiring diagrams are supplied as a guide only. Wiring diagrams supplied with the control
panel MUST be followed as they may included specific control functions/features..
APPROVED
CHECKED
DATE
DRAWN
TITLE
CLIENT DRAWING No
REVISION 2
JOB No
SHEET
REV DATE DESCRIPTION
SH
12/09/12
JC CP-AB-TWIN-AMBIENT R2
STANDARD
1 of 1
STANDARD
SCHEMATIC WIRING DIAGRAM FOR
AMBIENT TWIN MODULE DOOR CURTAINS
415v 3PH+N SUPPLY
LOW SPEED HIGH SPEED
MEDIUM SPEED
LOW SPEED HIGH SPEED
MEDIUM SPEED CA
CONTACTOR
PANEL LIVE
4
DOOR INTERLOCK MAKES AS DOOR OPENS
L1 L2 L3
N E
415 VOLT 3 PHASE 50 Hz
4 WIRE SUPPLY
DOOR LOCKED ISOLATOR
1 2 3 4
CA
5 6
4
789
4
MCB2
10
11
12 13 14
15
18
17
AUTO OFF MAN
MCB3 4A
CONTROL PANEL TERMINALS
PRE-WIRED FAN MOTORS
LAST WIRE No 17
MCB1 25A 25A
FAN MODULE 1
TERMINAL BOX
3.5M 4.0M 4.5M
AB350 AB400 AB450
DOOR WIDTH
AIRBLOC
MODEL
No OF MODULES
AB175 AB225
2 1 -
- 1 2
MOTOR LEAD COLOURS RED LOW SPEED WHITE NEUTRAL BLACK HIGH SPEED BLUE MEDIUM SPEED
CA
12 3
N E 1 2 3
NE
FAN MODULE 2
TERMINAL BOX
Wiring Colour Scheme
Phases..............: Black
Control 230V.....: Red
Neutral...............: Light Blue
24 VAC...............: Violet 24 VAC Ground.: White 24 VDC...............: Dark Blue
0-10 VDC............: Orange
Analogue Inputs: Grey
CONTROL PANEL TERMINALS
FAN
CUSTOMER SUPPLIED
4 CORE CABLES
2 GANG 3 POSITION SELECTOR SWITCH
PRE-WIRED FAN MOTORS
*
= WHERE
FAN MODULE 1 FAN MODULE 2 *
*
*APPLICABLE
= WHERE
APPLICABLE
TOTAL No
OF FANS
6 7 8
SINGLE MOTOR FLC 5.2A
16
REMOVE LINK FOR BMS CONTROL
1 22/12/15 MAINS ISOLATOR SWITCHED NEUTRAL
25A
2 23/03/18 MCB AND CONTACTOR CHANGED
63A
Ambient & LPHW Twin module

Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291 Page 15
CB
23
24
25 26
CC1 CC2
CONTACTORS
PANEL LIVE
4
L1 L2 L3
N E
415 VOLT 3 PHASE 50 Hz 4 WIRE SUPPLY
DOOR LOCKED ISOLATOR
1 2 3 4
4A
CA1
ROOM THERMOSTAT BREAKS ON RISING TEMP
4
CC
MODULE
ON/OFF SWITCH
2.5mm2
4.0mm2
14 15 16
17 18 19 20 21 22
CA2
31
33
34
36
37
HEATING
MCB2
MCB5
35
CB
33
40
DOOR
INTERLOCK
MAKES AS DOOR
OPENS
10.0mm2
4.0mm2
CB
HEAT ON/OFF SWITCH
33
FAN
CONTACTOR
(LINK IF NOT REQD)
34
25A MCB3
31
4
LINK
(REMOVE
FOR REMOTE
ENABLE)
2.5mm2
32A
5 6 7
8 9 10 11 12 13
CA1
MCB1
4.0mm2
CB
27
28
29 30
CC1 CC2
25A MCB4
CA2
36
38
DR
DR/1
DOOR RELAY
32A
THERMAL CUTOUT
THERMAL CUTOUT
LOW LOW HIGH
HIGH
HIGH SPEED
CONTACTOR
CC1
LOW SPEED
CONTACTOR
DR/2
25A 25A25A
39
33
32
APPROVED
CHECKED
DATE
DRAWN
TITLE
CLIENT DRAWING No
REVISION 1 SHEET
REV DATE DESCRIPTION
SH
14/03/14
JC CP-AB-ELEC-TWIN-36 R1
1 of 2
SCHEMATIC WIRING DIAGRAM 2 SPEED
ELECTRICALLY HEATED TWIN MODULE DOOR CURTAINS 36kW
STANDARD
Wiring Colour Scheme
Phases..............: Black
Control 230V.....: Red
Neutral...............: Light Blue
24 VAC...............: Violet 24 VAC Ground.: White 24 VDC...............: Dark Blue
0-10 VDC............: Orange
Analogue Inputs: Grey
1 22/12/15 MAIN ISOLATOR SWITCHED NEUTRAL
2 02/02/18 MCBS/CONTACTORS UPRATED
Fens Pool Avenue
Brierley Hill
West Midlands DY5 1QA Tel: [phone]
Fax: [phone]
Electric Heated Twin module
Sample wiring diagrams
Please note the following wiring diagrams are supplied as a guide only. Wiring diagrams supplied with the control
panel MUST be followed as they may included specific control functions/features..

NORTEK GLOBAL HVAC (UK) LTD
Fens Pool Avenue
Brierley Hill
West Midlands DY5 1QA
United Kingdom
Tel [phone]
Fax [phone]
[email protected]
www.reznor.eu
Nortek Global HVAC is a registered trademark of the Nortek Global HVAC limited. Because of the continuous product
innovation, Nortek Global HVAC reserves the right to change product specification without due notice.
Reznor, AB-2 Ambient Electric & LPHW, Installation Manual, EN 2020-05, D301291