Alfalaval Arctigo IS User manual

Arctigo IS/IST
Instruction manual
ORIGINAL INSTRUCTIONS
AHE00041EN

Contents
1 Important information..............................................................................3
1.1 Disclaimer..................................................................................................................................... 3
1.2 Intended use................................................................................................................................. 3
1.3 Where to find product information................................................................................................3
2 Product description................................................................................. 4
2.1 General information and application.............................................................................................4
2.2 Standard configuration..................................................................................................................4
2.3 Options..........................................................................................................................................4
2.4 Code description...........................................................................................................................5
3 Product labels.......................................................................................... 7
4 Unpacking and lifting............................................................................ 10
5 Installation...............................................................................................13
5.1 Assembly.....................................................................................................................................13
5.2 Mounting dimensions..................................................................................................................13
5.3 Mounting bracket........................................................................................................................ 14
5.4 Technical spaces........................................................................................................................ 14
5.5 Drain line.....................................................................................................................................15
5.6 Electrical connection...................................................................................................................16
5.7 Hot-gas defrost........................................................................................................................... 16
6 Maintenance............................................................................................19
6.1 Fan replacement.........................................................................................................................19
6.2 Driptray........................................................................................................................................19
6.3 Side covers................................................................................................................................. 20
6.4 Defrost heater element replacement.......................................................................................... 20
6.5 Sockring mounting...................................................................................................................... 20
6.5.1 Fan guard fixed on the inner side of the fan cowl........................................................22
6.5.2 Fan guard fixed on the edge of the fan cowl............................................................... 22
6.6 Shutupsock mounting................................................................................................................. 23
7 Spare parts............................................................................................. 26

1 Important information
1.1 Disclaimer
This Instruction Manual applies to all Alfa Laval Arctigo IS/IST industrial air cooler products and is supplied
in combination with the Alfa Laval Air Cooler Product Manual AHE00042. Both manuals 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 intended for
incorporation in cooling systems. Declarations of Incorporation are available on www.alfalaval.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
Arctigo IS
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.
AHE00041EN 3Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this 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 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 (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 through 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 reliable 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.
2.3 Options
• Defrost systems (incl. connection box for all electric defrost system)
AHE00041EN 4Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

• 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)
• Fan ring heater (FRH)
• 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)
• Switch on/off (SW)
• Fan motors wired to connection box (CB)
•
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 or 10 rows)
AHE00041EN 5Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

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 and 12 mm)
13.Fin spacing (4, 5, 6, 7, 8, 10 and 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.Options
AHE00041EN 6Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

3 Product labels
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.
Model Refer to Code
description on
page 5
Item ID, Serial no. Communicate
these when
ordering spare
parts as they
identify the unit
O.A. Order
Acknowledgement
number
2 Product label
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Manufactu rer: 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
Unit Net Weight Check before any
lifting operation
to ensure that
proper lifting tools
are used.
AHE00041EN 7Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

Model Refer to Code
description on
page 5
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
3 Product label - coil
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Manufactu rer: 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 G roup 2
Coil Ts: +125/-60 °C
Ps: 33 bar
Pt: 47 bar
Test Date: 04-2019
EXAMPLE
Test date Date on which
the coil has been
pressure tested in
the factory
4 Warning sign for fans
and fan type
Type DL
Airflow direction:
B= blow-through
D= draw-through
Rotation direction:
L= left
R= right
5 Lifting from above
Use all marked lifting lugs
Preferably use hoisting beams when
lifting from above.
AHE00041EN 8Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

6Lifting lug Use all marked lifing lugs when lifting
from above.
7 Electrical warning Electrically powered component.
Switch off power supply before any
maintenance or installation activity.
8 Fan motor Fan motor item number
9 In/Out
IN OUT
Refrigerant connections inlet and
outlet
AHE00041EN 9Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

4 Unpacking and lifting
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:
Unload and handle units only from the long side, one at a time.
When possible, casing options are supplied mounted on the unit. In such cases this warning might be
present on one side the unit packaging. 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
AHE00041EN 10 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

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.
Place the unit on the ground and loosen the fixing materials from the top pallet.
Remove the top pallet.
Lift the unit into mounting position and secure following instructions given in chapter
Installation on page 13
Once the unit is secured in the installation position, loosen the fixing materials from the lower support
pallet and remove pallet.
AHE00041EN 11 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

When unit lifting from above is required, follow the lifting instructions in the air cooler product manual
AHE00042.
AHE00041EN 12 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

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.
5.2 Mounting dimensions
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
L3
L2
L1 : all modules
L
2
: 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
Arctigo ISD, ISB
modules 1,2,3,3s
807
Arctigo ISD
modules 4,5,6,7
1312
Arctigo ISB
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 - -
AHE00041EN 13 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

5 1307 2000 - -
6 1507 2000 - -
7 1707 1600 - -
Tolerance on dimensions: ± 5 mm
Drawings showing all required mounting and refrigerant connection dimensions are available for download
on www.alfalaval.com.
Dimensional drawings
5.3 Mounting bracket
M10 stud (minimum)
Washer
Lock nut 12
24
Use extra wide washer (ISO 7093) when mounting the unit to the ceiling. Avoid any lateral torque on the
mounting brackets.
5.4 Technical spaces
The following guidelines are to be respected when positioning air cooler units.
Minimum wall distance on suction side.
D
D
≥ H
coil
H
coil
Minimum wall distance on suction side for air cooler models with water defrost system.
AHE00041EN 14 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

H
coil
D
D
≥
H
coil
Minimum space for defrost heater replacement
L
D
D ≥ L
Adequate spacing for driptray opening shall be left below the cooler.
driptray
+100
W
driptray
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.
A syphon must be installed on the drain line, outside the cold room.
Tighten drain connection by hand only.
AHE00041EN 15 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

Optional drain kit for PVC click-on connection including adapter, O-ring and 40 mm 45° PVC connection,
freely adjustable into either horizontal or vertical position.
5.6 Electrical connection
The following data determine which connection diagram is to be selected and respected for electrical
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.
Electrical connections
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.
ISD direct expansion
driptray IN
coil OUT
driptray OUT
coil IN
ISB direct expansion
coil OUT
driptray OUT
driptray IN
coil IN
ISD pumped, bottom feed ISB pumped, bottom feed
AHE00041EN 16 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

driptray IN
coil IN
coil OUT
driptray OUT
driptray IN
driptray OU
T
coil IN
coil OUT
ISD pumped, top feed
coil IN
coil OUT
driptray IN
driptray OUT
ISB pumped, top feed
coil IN
coil OUT
driptray IN
driptray OUT
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.
ISB pumped, bottom feed
50
30°
Top header
Connection tube
from HG serpentine
ISB/ISD direct expansion
Header DX
Connection tube
from HG serpentine
AHE00041EN 17 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

ISD pumped, bottom feed
45°
Top header
50
Connection tube
from HG serpentine
ISB/ISD pumped, top feed
Bottom header
Connection tube
from HG serpentine
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.
ISB/ISD pumped, top feed
driptray IN
driptray OU
T
REFRIGERANT-I
N
HOT
-
GA
S
CONDENS
AT
E OU
T
REFRIGERANT
-OUT
HO
T
-
GAS IN
(FROM DRIPTRA
Y
SPIRA
L IF CONNECTED
IN SERIES)
AIRFLO
W
ISB/ISD pumped, bottom feed
driptray IN
driptray OU
T
REFRIGERANT-I
N
HO
T
-
GA
S
CONDENS
AT
E OUT
REFRIGERANT
-OUT
HO
T-
GAS IN
(FROM SPIRA
L
IF CONNECTED IN
SERIES)
AIRFLO
W
AHE00041EN 18 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this 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
M8
max 90°
Figure 1: Opening the 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 (90°) to avoid damage to the driptray
hinges.
AHE00041EN 19 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.

6.3 Side covers
Hinged side covers can be opened for inspection, cleaning and maintenance purposes. This can only be
done by qualified personnel. To open side covers, loosen fixing bolts.
6.4 Defrost heater element 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.
6.5 Sockring mounting
Fan guard can be fixed to the cowl in two different manners:
AHE00041EN 20 Alfa Laval is a trademark registered and owned by Alfa Laval Corporate AB.
Alfa Laval reserves the right to change this specification without prior notification.