Alfalaval Arctigo IS User manual

ORIGINAL INSTRUCTIONS
AHE00041EN 1904 9460102298-04
Alfa Laval Arctigo IS/IST
Instruction manual
•Product description
•Product labels
•Unpacking & lifting
• Installation
• Maintenance
•Spare parts

AHE00041EN 1904
3
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
Index
1. Important information
1.1 Disclaimer...................................................................................................................................4
1.2 Intended use...............................................................................................................................4
1.3 Where to nd product information ..............................................................................................4
2. Product description
2.1 General information and application...........................................................................................5
2.2 Standard conguration ...............................................................................................................5
2.3 Options.......................................................................................................................................6
2.4 Code description ........................................................................................................................7
3. Product labels...........................................................................................................................7
4. Unpacking and lifting.............................................................................................................10
5. Installation
5.1 Assembly..................................................................................................................................12
5.2 Mounting dimensions ...............................................................................................................12
5.3 Mounting bracket......................................................................................................................13
5.4 Technical spaces......................................................................................................................13
5.5 Drain line ..................................................................................................................................14
5.6 Electrical connections...............................................................................................................14
5.7 Hot gas defrost.........................................................................................................................15
6. Maintenance
6.1 Fan replacement ......................................................................................................................18
6.2 Driptray.....................................................................................................................................18
6.3 Side covers...............................................................................................................................18
6.4 Defrost heater elements replacement ......................................................................................18
6.5 Sockring mounting....................................................................................................................19
6.6 Shutupsock mounting................................................................................................................20
7. Spare parts..............................................................................................................................22

AHE00041EN 1904
4
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
1 Important information
1.1 Disclaimer
This Instruction Manual applies to all Alfa Laval Arctigo IS and IST industrial air cooler products and
is supplied in combination with the Alfa Laval Air Cooler Product Manual AHE00042. Both manu-
als must be carefully examined and instructions should be followed up at all times. Alfa Laval does
not accept liability for any damage resulting from non-compliance to the instructions as given in the
manuals and order-related documents.
1.2 Intended use
Air coolers are partly completed machinery according to Machine Directive 2006/42/EC and intend-
ed for incorporation in cooling systems. Declarations of Incorporation are available on www.alfa-
laval.com. The units may not be put into operation until the conformity of the complete machine or
cooling system has been declared according to the following standards and directives:
• Pressure Equipment Directive 2014/68/EU
• Machine Directive 2006/42/EC
• Low voltage directive 2014/35/EU
• Electrical Equipment of Machines IEC 60204-1
• Electro Magnetic Compatibility 2014/30/EU
• Any applicable local or national legislation
1.3 Where to find product information
Detailed technical data for individual product models are available in order related documents, on
the product label and in product data sheets. Comprehensive technical information for all Alfa Laval
air heat exchanger products is available on-line on www.alfalaval.com. This includes:
• Product manuals
• Instruction manuals
• Product leaflets & brochures
• Product data sheets (selection software)
• Dimensional drawings
• Electrical wiring diagrams
• Certificates
Alfa Laval offers world-wide service and support in over 55 countries. In case of any questions
or uncertainty please contact your local Alfa Laval representative. Contact addresses are available
at www.alfalaval.com.
Arctigo IS

AHE00041EN 1904
5
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
2 Product description
2.1 General information and application
Arctigo IS/IST is a wide and flexible range of single discharge industrial air coolers for both cooling
and freezing applications in medium to large cold rooms, designed to keep fresh and frozen goods
refrigerated from +10 to -40 °C, with either high or low humidity content.
The Alfa Laval Arctigo range offers a wide variety of cooler configurations and a long list of options,
always allowing to select the best model to suit all applications in industrial cooling installations.
Arctigo cooler models are available for dedicated applications.
• Refrigerants: HFO/HFC, ammonia, brine, CO2
• Capacity range (SC2): 3 up to 250 kW
• Air volume: 3,000 up to 120,000 m3/h.
Refrigerant application Design pressure
HFO/HFC 33 bar
Ammonia 30 bar
CO2 33-40-50-60 bar
Brine 10 bar
2.2 Standard configuration
• Finned coil:
- 8 coil block modules
- 3, 4, 6, 8 or 10 tube rows deep
- Tubing ø 5/8”Cu ripple fin, smooth Cu tubing for brine or smooth stainless steel.
- Tube pitch 50 mm square or 48 mm triangular.
- Corrugated Alu-fins
- Fin spacings 4, 5, 6, 7, 8, 10 and 12 mm.
• 1 to 8 Fans, ø 450 mm up to ø 1000 mm, drawing or blowing trough the coil.
2-Speed fan motors 400/50-60/3 or 230/50-6-/1 (ø 450 only), two noise levels (D/Y).
AC/EC Fan motors with dynamically and statically balanced external rotors, manufactured in
accordance with VDE 530/12.84 IP54 class F. Integrated thermo contacts (Clickson) provide reli-
able protection against thermal overload.
• Corrosion resistant materials: coil frame and casing pre-galvanized sheet steel, epoxy coated
RAL 9002.
• Hinged side panels and driptray, drain(s) 1½" BSP external
• Fitted with schräder valve on the suction connection for testing purposes.
• Refrigerant connections right or left (L=default).
• Sufficient room for fitting the expansion valve inside.
• Suitable for dry expansion or pumped system.
• Stickers indicate fan direction and refrigerant in/out.

AHE00041EN 1904
6
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
2.3 Options
• Defrost systems (incl. connection box for all electric defrost system)
- Electric defrost - drip tray (E1)
- Electric defrost - heavy (E2)
- Electric defrost - light (E4)
- Hotgas defrost - light, not connected (HG1)
- Hotgas defrost - heavy, not connected (HG2)
- Hotgas defrost - light, connected (HG1C)
- Hotgas defrost - heavy, connected (HG2C)
- Water defrost (W1)
- Water defrost - low temperatures (W2)
- Hot water/glycol defrost light/heavy (HW1/HW2)
• Defrost damper heater (E5)
• Diffusor (D)
• Diffusor with defrost damper (DO)
• Hinged fan ring (HF)
• Inlet/discharge hood 45/90° (H2/H1)
• Driptray insulation 13 mm styropore + cladding (I2)
• Drain kit adapter, rubber O-ring and 45° 40 mm PVC connection,freely adjustable into either
horizontal or vertical position.
• Streamer (ST)
• Shutupsock (S)
• Fan casing 45/90° (FC1/FC2)
• Sockring (SR)
• Coil protection
- Pre-coated aluminium (EP)
- AlMg2.5 sea water resistant aluminium fins (SWR)
• Slip-on flanges (F) for brine models only:
-aluminium PN16 for copper tube units
-stainless steel PN16 for stainless steel tube units
• Dual fin spacing (DF) Available on request
• Stainless steel casing and frame (SSC)
• Mounting feet (MF)
• Fan ring heater (FRH)
• Switch on/off (SW)
• Fan motors wired to connection box (CB)

AHE00041EN 1904
7
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
2.4 Code description
IS B 3 5 - 2 s H 8 CU - E - 50 AL - 7.0 2H-5 - L - FA04A - D FRH
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 IS=Alfa Laval Arctigo industrial air cooler - single discharge
IST=Alfa Laval Arctigo industrial air cooler - tunnel cooler
2 Air direction (B=blow through, D=draw through)
3 Cooler module size (1 to 7)
4 Number of fans (1 to 8)
5 Coil geometry (1=triangular, 2=square)
6 Short coil module (s)
7 Fan speed (H=high power fan)
8 Tube rows in air direction (3, 4, 6, 8, 10 rows)
9 Tube material (CU=copper, SS=stainless steel)
10 Refrigerant system (E=DX, W=brine, X=CO2,
PB=pumped bottom feed, PT=pumped top feed)
11 Maximum working pressure
12 Fin material (AL=aluminium, EP=precoated aluminium, SWR=sea water resistant aluminium)
13 Fin spacing (4, 5, 6, 7, 8, 10, 12 mm)
14 Circuiting code (2H, 1H, 1/2H ... 2D, 1D, 1/2D...)
15 Refrigerant connection side (R=right, L=left - fan side view)
16 Fan motor code
17 Fan connection
18 Option code
3 Product labels
⑤
⑥
⑧
⑦
③
②⑥
⑥
⑥
④
①
⑨
⑩
1. Nitrogen precharge warning
Units are delivered from the manufacturer
with an overpressure. Check pressure on
the Schrader valve. With unpressurised unit:
Immediate report to manufacturer and note on
bill of delivery.
5.307
ATTENZIONE!
CIRCUITO FRIGORIFERO PRECARICATO CON AZOTO
WARNING!
PRECHARGED REFRIGERANT CIRCUIT WITH NITROGEN
ACHTUNG!
VERLADTER KÄLTEMITTELKREISLAUF MIT STICKSTOFF
ATTENTION!
CIRCUIT FRIGORIFIQUE PRE-CHARGE AVEC AZOTE
BHИМАНИЕ!
СИСТЕМА ЗАПРАВЛНА АЗОТОМ

AHE00041EN 1904
8
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
2. Product label
Model Refer to paragraph
"Code description"
Item ID
Serial no.
Communicate these
when ordering
spare parts as they
identify the unit
O. A. Order
Acknowledgement
number
Unit Net Weight Check before any
lifting operation to
ensure that proper
lifting tools are used
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Manufacturer: Manuf. date:
AIR HEX ALONTE S.R.L. - Italy 04 / 2019
Model:
ISD12-16CU-EH33-AL10.0-1/2H-4-
GSE/E2
Item ID: 3289214612
Serial no. AA 2349091
O.A. 387589/20
Unit Net Weight: 171 Kg ±5%
Sn
EXAMPLE
Country of origin Italy
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Manufacturer: Manuf.date:
AIR HEX ALONTE S.R.L. - Italy 04 / 2019
Model: O.A. 387589/20
ISD12-16CU-EH33-AL10.0-1/2H-4-
GSE/E2
Item ID: 3289214612
Serial no. AA 2349091
Sn
Coil PED data: I
Max DN: 35
Fluid Group 2
Coil Ts: +125/-60 °C
Ps: 33 bar
Pt: 47 bar
Test Date: 04-2019
EXAMPLE
3. Product label - coil
Model Refer to paragraph
"Code description"
Item ID
Serial no.
Communicate these
when ordering
spare parts as they
identify the unit
Max DN Maximum diameter
of the distributor
tube
Fluid Group According to PED
Coil Ts Range of operating
temperatures for the
coil
Ps Design pressure
Pt Test pressure
Test date Date on which the
coil has been pres-
sure tested in the
factory

AHE00041EN 1904
9
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
4. Warning sign for fans and fan type
Airflow direction:
B= blow-through
D= draw-through
Rotation direction:
L= left
R= right
5. Lifting from above
Preferably use hoisting beams when lifting from
above.
Use all marked lifting lugs
Type DL
6. Lifting lug
Use all marked lifing lugs when lifting from
above.
7. Electrical warning
Electrically powered component. Switch off
power supply before any maintenance or instal-
lation activity.
Spare part
item no
9460088799
8. Fan motor
Fan motor item number.
9/10. In/Out
Refrigerant connections inlet and outlet.
IN OUT

AHE00041EN 1904
10
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
Always follow guidelines and instructions as given in the air cooler product manual AHE00042.
Arctigo air coolers are delivered in mounting position, mounted on wooden beams. Handling and
positioning can take place with use of a forklift. When more than one cooler units are delivered in a
single shipment, packed air coolers may be stacked during transportation (max. 2 units). Packed air
coolers are to be unloaded one by one and lifted according to the following procedure:
Units must be unloaded and handled only from
the long side, one at a time.
www.alfalaval.com
1:2
A1
This document and its contents is owned by Alfa Laval AB (publ.) or its affiliates and protected by laws governing intellectual property and thereto related rights. Without limiting any rights related to this document, no part of this
document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval. Nor may it
be used in any other way or for any other purpose than expressly permitted by Alfa Laval. Alfa Laval will enforce its rights related to this document to the fullest extent of the law, including the seeking of criminal prosecution.
Scale
Format
- -00
Tolerance class M EN 22768-1 22768-2
Drawn by Approved by DateDate
Weight
Treatment
mm
Replaces
161517.6Kg
Assosiated / References to
Article number
REV Date
Modifications Revisor
Approved by
Dimensions
REV
00
In order to avoid damage to the driptray or falling
of the unit, ensure that the lifting forks cover all
beams from the lower support pallet.
When possible, casing options are supplied
mounted on the unit. In such cases this warning
might be present on one side the unit packag-
ing. In order to ensure safe lifting, the unit must
be loaded on the heavier side i.e. the one where
this warning sign is not present.
DO NOT LIFT
ON THIS
SIDE
4 Unpacking and lifting

AHE00041EN 1904
11
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
www.alfalaval.com
1:2
A1
This document and its contents is owned by Alfa Laval AB (publ.) or its affiliates and protected by laws governing intellectual property and thereto related rights. Without limiting any rights related to this document, no part of this
document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval. Nor may it
be used in any other way or for any other purpose than expressly permitted by Alfa Laval. Alfa Laval will enforce its rights related to this document to the fullest extent of the law, including the seeking of criminal prosecution.
Scale
Format
- -00
Tolerance class M EN 22768-1 22768-2
Drawn by Approved by DateDate
Weight
Treatment
mm
Replaces
5702.8Kg
Assosiated / References to
Article number
REV Date
Modifications Revisor
Approved by
Dimensions
REV
00
Remove the top pallet.
www.alfalaval.com
1:2
A1
This document and its contents is owned by Alfa Laval AB (publ.) or its affiliates and protected by laws governing intellectual property and thereto related rights. Without limiting any rights related to this document, no part of this
document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval. Nor may it
be used in any other way or for any other purpose than expressly permitted by Alfa Laval. Alfa Laval will enforce its rights related to this document to the fullest extent of the law, including the seeking of criminal prosecution.
Scale
Format
- -00
Tolerance class M EN 22768-1 22768-2
Drawn by Approved by DateDate
Weight
Treatment
mm
Replaces
5702.8Kg
Assosiated / References to
Article number
REV Date
Modifications Revisor
Approved by
Dimensions
REV
00
Lift the unit into mounting position and secure
following instructions given in chapter "5
Installation"
www.alfalaval.com
1:2
A1
This document and its contents is owned by Alfa Laval AB (publ.) or its affiliates and protected by laws governing intellectual property and thereto related rights. Without limiting any rights related to this document, no part of this
document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval. Nor may it
be used in any other way or for any other purpose than expressly permitted by Alfa Laval. Alfa Laval will enforce its rights related to this document to the fullest extent of the law, including the seeking of criminal prosecution.
Scale
Format
- -00
Tolerance class M EN 22768-1 22768-2
Drawn by Approved by DateDate
Weight
Treatment
mm
Replaces
5702.8Kg
Assosiated / References to
Article number
REV Date
Modifications Revisor
Approved by
Dimensions
REV
00
Once the unit is secured in the installation posi-
tion, loosen the fixing materials from the lower
support pallet and remove pallet.
When unit lifting from above is required, follow
the lifting instructions in the air cooler product
manual AHE00042
Place the unit on the ground and loosen the fix-
ing materials from the top pallet.
www.alfalaval.com
1:2
A1
This document and its contents is owned by Alfa Laval AB (publ.) or its affiliates and protected by laws governing intellectual property and thereto related rights. Without limiting any rights related to this document, no part of this
document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval. Nor may it
be used in any other way or for any other purpose than expressly permitted by Alfa Laval. Alfa Laval will enforce its rights related to this document to the fullest extent of the law, including the seeking of criminal prosecution.
Scale
Format
- -00
Tolerance class M EN 22768-1 22768-2
Drawn by Approved by DateDate
Weight
Treatment
mm
Replaces
5702.8Kg
Assosiated / References to
Article number
REV Date
Modifications Revisor
Approved by
Dimensions
REV
00

AHE00041EN 1904
12
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
5.2 Mounting dimensions
Tolerance on dimensions: ± 5 mm
Detailed drawings showing all required mounting and refrigerant connec-
tion dimensions are available for download on www.alfalaval.com.
L1
L1
L2
L1
L3
L1
L2
L1
L2
L2
L3
L2
L3
L1
L1 L1
L2
L1 L1 L1
L2
L1 L1 L1 L1
L3
L 2 L2
L3 L2
L3L2
L1 : all modules
L2 : modules 1, 2, 3, 3s
L1 : modules 4, 5, 6, 7
module 1
module 1
L3 : module 1
L1 : modules 2, 3, 3s, 4, 5, 6, 7
L2 : modules 1, 2, 3, 3s
L1 : modules 4, 6, 7
L2 : modules 1, 2, 3, 3s
L1 : module 7
L3 : module 1
L2 : modules 2, 3, 3s
912
ArctigoISD, ISB
modules 1,2,3,3s
807
Arctigo ISD
modules 4,5,6,7
1312
ArctigoISB
modules 4,5,6,7
H
H
H
H
H
H
H
H
Module H L1 L2 L3
1 587 800 1600 2400
2 687 1000 2000 -
3 887 1200 2400 -
3s 887 1000 2000 -
4 1107 1600 - -
5 1307 2000 - -
6 1507 2000 - -
7 1707 1600 - -
Dimensional drawings
5 Installation
Always follow guidelines and instructions as given in the air cooler product manual AHE00042.
5.1 Assembly
Air cooler units may be delivered as separate components that need to be assembled on site. This
could occur when casing options like discharge diffusors and suction hoods are selected, causing
the unit to exceed the maximum width for transportation by truck (240 cm). Depending on handling
conditions on site, assembly should take place either before or after mounting the unit to the final
installation position. When supplied in components, assembly instructions are included with the air
cooler unit.

AHE00041EN 1904
13
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
5.3 Mounting bracket
M10 stud (minimum)
Washer
Lock nut 12
24
Use extra wide washer (ISO 7093) when mount-
ing the unit to the ceiling.
Avoid any lateral torque on the mounting brack-
ets.
5.4 Technical spaces
The following guidelines are to be respected when positioning air cooler units.
Minimum wall distance on suction side.
D
D≥Hcoil
Hcoil
L
D
D≥L
Minimum space for defrost heater replacement
Minimum wall distance on suction side for air
cooler models with water defrost system.
Hcoil
D
D≥Hcoil
D > Wdriptray+100
Wdriptray
Adequate spacing for driptray opening shall be
left below the cooler.

AHE00041EN 1904
14
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
5.6 Electrical connections
The following data determine which connection diagram is to be selected and respected for electri-
cal installation:
• Heat exchanger model indication
• Fan motor type
• Electrical options
Electrical connection diagrams are available for download on
www.alfalaval.com. When in doubt always contact your local supplier
or Alfa Laval Market Support for assistance.
5.5 Drain line
The drain line diameter must be at least the size of the driptray drain diameter and should be laid
with an adequate slope. For room temperatures below 0° C drain line insulation and an internal or
external heating element are required to prevent freezing.
Tighten drain connection by hand only.
A syphon must be installed on the drain line,
outside the cold room.
Optional drain kit for PVC click-on connection
including adapter, O-ring and 40 mm 45° PVC
connection, freely adjustable into either horizon-
tal or vertical position.
Electrical connections

AHE00041EN 1904
15
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
5.7 Hot-gas defrost
Whenever hot-gas defrost "not connected" (HG1, HG2) is selected, we recommend to connect it as
shown below for optimal defrost.
driptray IN
driptray OUT
coil IN
coil OUT
50
30°
Top header
Connection tube
from HG serpentine
Header DX
Connection tube
from HG serpentine
coil OUT
driptray OUT
driptray IN
coil IN
45°
Top header
50
Connection tube
from HG serpentine
driptray IN
coil IN
coil OUT
driptray OUT
driptray IN
coil OUT
driptray OUT
coil IN
ISB pumped, bottom feed
ISB direct expansion
ISD pumped, bottom feed
ISD direct expansion
coil IN
coil OUT
driptray IN
driptray OUT
coil IN
coil OUT
driptray IN
driptray OUT
ISB pumped, top feedISD pumped, top feed

AHE00041EN 1904
16
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
45°
Top header
50
Connection tube
from HG serpentine
driptray IN
coil IN
coil OUT
driptray OUT
ISD pumped, bottom feed
Bottom header
Connection tube
from HG serpentine
ISB/ISD pumped, top feed
If driptray and coil defrost are connected in series we recommend that hot-gas passes first trough
the driptray. Connection as below are recommended to avoid liquid recirculation.
driptray IN
driptray OUT
coil IN
coil OUT
50
30°
Top header
Connection tube
from HG serpentine
ISB pumped, bottom feed
Header DX
Connection tube
from HG serpentine
coil OUT
driptray OUT
driptray IN
coil IN
ISB/ISD direct expansion

AHE00041EN 1904
17
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
In case of double coil units, hot-gas defrost is always supplied not connected. This is due to the fact
that we recommend to connect hot gas to the common line both for the inlet and the outlet. This
recommendation applies both for connection in series and in parallel.
driptray IN
driptray OUT
REFRIGERANT-IN
HOT-GAS
CONDENSATE OUT
REFRIGERANT-OUT
HOT-GAS IN
(FROM DRIPTRAY
SPIRAL IF CONNECTED
IN SERIES)
AIRFLOW
driptray IN
driptray OU
T
REFRIGERANT-IN
HOT-GAS
CONDENSATE OUT
REFRIGERANT-OUT
HOT-GAS IN
(FROM SPIRAL
IF CONNECTED IN
SERIES)
AIRFLOW
ISB/ISD pumped, top feed
ISB/ISD pumped, bottom feed

AHE00041EN 1904
18
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
6 Maintenance
Ensure complete electrical isolation before performing any maintenance activity and always follow
guidelines and instructions as given in the air cooler product manual AHE00042.
6.1 Fan replacement
Cable glands must be positioned downwards.
Use an anti-corrosion coating like Geomet or
comparable when remounting using new fixing
bolts.
6.2 Driptray
Always disconnect drain line before opening the
driptray. To open tray, first loosen and remove
fixing bolts and then lower the driptray. Respect
the maximum opening angle to avoid damage to
the driptray hinges.
M8
max 90°
6.3 Side covers
Hinged side covers can be opened for inspec-
tion, cleaning and maintenance purposes. This
can only be done by qualified personnel. To
open side covers, loosen fixing bolts.
6.4 Defrost heater elements replacement
Always disconnect power supply before handling
heater elements. To remove heater elements,
remove fixing screw and extract element from
coil. Mount new element in reverse order and
restore electrical connections.

AHE00041EN 1904
19
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
Fan guard fixed on the inner side of the fan cowl
6.5 Sockring mounting
Fan guard can be fixed to the cowl in two different manners.
Fan guard fixed on the inner side of the fan cowl Fan guard fixed on the edge of the fan cowl
Place the sockring on the top of the fan cowl
and fix it to the edge with four rivets.
Restore electric connection of the fan. For
electrical connections please refer to the wiring
diagrams.
Fan guard fixed on the edge of the fan cowl
Unscrew fixing bolts and remove the fan.

AHE00041EN 1904
20
Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change specification without prior notification.
Position the sockring on the top of the fan cowl.
Align the fixing holes of the sockring and the fan
cowl. Remount the fan using the bolts provided.
Restore electric connection of the fan. For
electrical connections please refer to the wiring
diagrams.
6.6 Shutupsock mounting
Position the shutupsock such that the belt is
mechanically blocked by the rounding on the
sockring.
Slacken the shutupsock belt. Let the sock over-
lap the sockring. Fasten the belt.