ELTA FANS QUIETFLOW TWIN SQT Series Maintenance and service guide

These instructions must be read fully before commencing installation.
QUIETFLOW
TWIN SQT
Installation & Maintenance

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Installation Instructions
QUIETFLOW
TWIN SQT
1.0 General
1.1 It is important these Installation and Maintenance Instructions are fully adhered to.
1.2 Full details of the unit supplied are shown on the product nameplate. If in doubt about any detail contact Elta Fans Ltd or its agents for
clarification.
1.3 All electrical installation must be carried out by suitably qualified and competent personnel in accordance with all current statutory
requirements.
1.4 These instructions cover only the Elta Fans Ltd product and do not include the supply or installation of any safety equipment that may be
required e.g. adequate guarding or protection from rotating parts and proper electrical isolation.
1.5 Any declarations made by Elta Fans Ltd about product installation and safety, are dependant on the fan equipment being used within
installations which themselves meet the requirements of the relevant Standards and Directives of your region.
1.6 The fan is designed for use in an ambient temperature of -20°C up to a maximum of +60°C and up to 95% relative humidity. The fan is
not suitable for corrosive or explosive atmospheres.
1.7 The installer should provide easy access to the fan to facilitate future maintenance.
1.8 The installer should ensure the fan is adequately supported.
1.9 This product is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or instruction concerning use of the product by a person responsible
for their safety. Children should be supervised to ensure that they do not play with the product.
1.10 At end-of-life, the unit must be disposed of in an environmentally friendly manner by suitably qualified and competent personnel in
a ccordance with the requirements of applicable Standards and Directives.
2.0 Installation
WARNING – The fan must be isolated from the power supply during installation and maintenance. The fan must be earthed in
accordance with the local regulations.
2.1 Upon receipt, the fan equipment should be visually inspected to check for any damage. Ensure that the impeller is free to rotate.
2.2 If there are any queries concerning the fan equipment, Elta Fans Ltd should be contacted prior to the installation.
2.3 The fan must be securely mounted in the desired position to suit the application. The fan can be mounted at any angle.
2.4 Check the details on the motor rating plate to ensure that the correct power supply (voltage, frequency and phase) is available.
An incorrect power supply will lead to permanent damage to the fan motor.
2.5 Refer to the appropriate wiring diagram. Ensure that all earth connections are made.
2.6 Means for electrical disconnection must be incorporated in the wiring installation in accordance with the relevant wiring and electrical
regulations.
2.7 Precaution must be taken to locate the exhaust discharge terminal so as to avoid the backflow of gases into the room from the open flue
of gas or other fuel burning appliances.
EC
Please note: This is an estimated adjustment guide
149-CD-POT
The 149-CD-POT is a commissiong device designed to be used with our EC range of fans.
This device will be as standard with our box fan range from May 2018.
The device will allow the for the installer to set the maximum operating speed of the fan that it is
connected to.
The installer or commissioning engineer can adjust the fan speed using the potentiometer built onto the
149-CD-POT board. This potentionmeter can either be used for single speed adjustment or to set a
maximum speed for the fan to operate at when an external control source is used.
If external speed control is required, the jumper connection next to the potentionmeter on the board
would need to be removed, the installer can then connect to ST1 (using the diagram provided).
When an external speed control is tted, the maximum speed setting available to the external control is
limited by the potentiometer setting of the commissioning device.
10/07/2018
MK-149-CD-POT Issue: Saved Date:A
Level / Speed OHMS (Ω)
10 10 (Ω)
99 (Ω)
88 (Ω)
77 (Ω)
66 (Ω)
55 (Ω)
44 (Ω)
33 (Ω)
21.5 (Ω)
1500 (Ω)
01 (Ω)
149-CD-POT

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 3
EC
3.0 Start Up
3.1 Before power is supplied to the unit, check that the wiring is correct as per the fan connection diagram.
3.2 At initial start-up, check that impeller rotation and airflow direction is correct.
3.3 Check that the motor amperage drawn does not exceed the nameplate rating.
4.0 Fan Maintenance
4.1 Inspection of the fan at least once every 12 months is recommended to ensure that the motor, fan blades, and supporting guards, are
clean. Any build up of dust and deposits on the blades or guards should be removed using a non-abrasive cleaner.
4.2 All fastenings should be checked for tightness. In addition, all rotating items should be checked.
4.3 Bearings are of the ‘sealed for life’ type and will not need a detailed inspection.
WARNING - The EC fan has internal electronic overload protection and the AC fan is fitted with an auto-reset thermal cut-out which
switches the fan off in the event of a fault condition.
Once the motor cools down the fan may start unexpectedly.
Only a suitably qualified and competent person may carry out maintenance after the electrical supply has been isolated.
Installation Instructions
QUIETFLOW
TWIN SQT
GND 10V E1
MIN MAX
E1 GND
ST1
ST2
ST2
E1 10V GND
MAX MIN
ST1
GND E1
THE ABOVE DIAGRAM SHOWS "ST2".
"ST2" CONNECTIONS ARE FACTORY FITTED.
GND = COMMON •
10V = 10VDC INPUT •
E1 = 0-10VDC OUTPUT •
YOU CAN DETERMINE THE CURRENT VDC OUTPUT BY
DISCONNECTING POWER TO THE UNIT, SETTING A
MULTIMETER TO OHMS (Ω) AND PLACING THE TEST PROBES
BETWEEN GND AND E1
PLEASE USE THE ESTIMATED ADJUSTMENT GUIDE FOR REFERENCE
THIS IS THE INTERNAL POTENTIOMETER
THIS POTENTIOMETER CAN BE ADJUSTED FOR SINGLE SPEED
SETTING OR MAX SPEED SELECTION
THIS LINK/JUMPER SHOULD BE REMOVED
WHEN USING AN EXTERNAL POTENTIOMETER
OR EXTERNAL CONTROL SIGNAL CONNECTED
TO "ST1"
THE ABOVE DIAGRAM SHOWS "ST1".
"ST1" CONNECTIONS ARE CLASSED AS
"CUSTOMER/USER CONNECTIONS".
GND = COMMON •
+ = VDC OUTPUT AS SET BY •
INTERNAL POTENTIOMETER
E1 = 0-10VDC INPUT •
149-CD-POT
10/07/2018
MK-149-CD-POT
Issue: Saved Date: A
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
149-CD-POT Issue A: 10.07.2018
Check the individual product accessories table for fan controller compatibility.
Please note: This is an estimated adjustment guide
149-CD-POT
The 149-CD-POT is a commissiong device designed to be used with our EC range of fans.
This device will be as standard with our box fan range from May 2018.
The device will allow the for the installer to set the maximum operating speed of the fan that it is connected to.
The installer or commissioning engineer can adjust the fan speed using the potentiometer built onto the 149-CD-POT board.
This potentionmeter can either be used for single speed adjustment or to set a maximum speed for the fan to operate at when an
external control source is used.
If external speed control is required, the jumper connection next to the potentionmeter on the board would need to be removed,
the installer can then connect to ST1 (using the diagram provided).
When an external speed control is fitted, the maximum speed setting available to the external control is limited by the potentiometer
setting of the commissioning device.

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Table 1: Operational Maintenance
Activity Frequency
Inspect AV mounts for Corrosion or “Sag” 6 months
Check earth bonding 6 months
Dampers check rubber stops and grease (lithium based) pivot points, by removing plastic caps Yearly
Check fixings tightness and conditions of brass track and rivets 26,000 hours / 3 years
Inspect and clean impeller 26,000 hours / 3 years
Remove dirt from motor cooling fins 26,000 hours / 3 years
Check operation of anti-condensation heaters 26,000 hours / 3 years
Check for even tip clearance between impeller and casing – For ATEX 10% of motor shaft
diameter with 2mm minimum and 13mm maximum. 26,000 hours / 3 years
Check motor Amps 26,000 hours / 3 years
Any corrosion - treat with suitable chemicals 26,000 hours / 3 years
Check casing seals 26,000 hours / 3 years
Table 2: Terminal Box Maintenance
Activity Frequency
Check that lid seal is in place and not damaged Each time the enclosure is opened
Check that lid fixing screws are in place and secured Each time the enclosure is closed
Check that the mounting bolts are tight and free from corrosion Annually
Check security of all cable glands Annually
Check that all screw clamps terminals are secure Annually and each time enclosure is opened
Check enclosure for damage Annually
5.0 Storage
5.1 If the fan is not to be used immediately then it should be stored in a clean, dry, vibration free and lockable location.
5.2 The impeller must be spun by hand (ensuring that it does not come to rest in the same position) on a monthly basis to prevent hardening
of the grease and possible damage to the bearings.
5.3 All items to be stored on pallets that afford adequate protection from damage, dust and high humidity.
5.4 If storage periods of longer than 1 month are anticipated then Elta (or their Agent) should be contacted prior to storage taking place,
to ensure the storage area provisions will not be detrimental to the well being of Elta products.
6.0 Guarantee
Elta Fans Ltd will, free of charge, within a period of 1 year from the date of dIspatch from their works, repair or at its option replace any
goods which are proved to have defects as a result of defective materials or workmanship. The goods MUST be returned to Elta Fans Ltd
carriage paid for examination.
Installation Instructions
QUIETFLOW
TWIN SQT

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 5
Single Phase 220V - 277V / 50Hz or 60Hz Three Phase 380V - 480V / 50Hz or 60Hz
Page
No.
Product
Code
Wiring
Diagram No.
5SQT125-1ECL 152-000236
5SQT150-1ECL 152-000236
5SQT200-1ECL 152-000236
5SQT250-1ECL 152-000236
6SQT315-1ECL 152-02298951
7SQT400-1ECL 152-2MOEA03K1
7SQT500-1ECL 152-2MOEA03K1
Page
No.
Product
Code
Wiring
Diagram No.
8SQT500-3ECL 152-2MOEA03K3
Wiring Diagrams
QUIETFLOW
TWIN SQT
Please use the table(s) below to match up the product code and the wiring diagram number.
EC

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Wiring Diagrams
152-000236
E
N
L
N1 L2 GNDE1N2L1 10VA1
VOLT FREE CONTACT
N/O CLOSE ON FAIL
230 VAC 5A
4 5 6 731 2 8 1211109
ACO PANEL
TWIN FAN
220 - 240V 1PH 50Hz SUPPLY
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E)
BROWN
BLUE
BLUE
BLUE
BROWN
BROWN
GREEN/YELLOW
GREEN/YELLOW
BLUE
BROWN
GREEN/YELLOW
GREEN/YELLOW
BLUE
BLUE
BROWN
BROWN
N1 L2 GNDE1N2L1 10VA1
VOLT FREE CONTACT
N/O CLOSE ON FAIL
230 VAC 5A
ACO PANEL
TWIN FAN
220 - 240V 1PH 50Hz SUPPLY
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E) AND SPEED CONTROLLER (149-POT-10)
L N E
1 2 9 10 11 1283 7654
1 149-POT-105672
ALL WIRING AND CONTROL EQUIPMENT MUST COMPLY TO THE
LATEST IEE REGULATIONS, IN PARTICULAR PART 552-01-02/03
11/07/2013
MK-152-000236 Issue: Saved Date:C
EC
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-000236 Issue C: 11.07.2013
Check the individual product accessories table for fan controller compatibility.

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 7
Wiring Diagrams
152-000236-CD
20/06/2018
MK-152-00236-CD
Issue: Saved Date:
A
ALL WIRING AND CONTROLS EQUIPMENT MUST COMPLY TO THE
LATEST IET REGULATIONS, IN PARTICULAR PART 552-01-02/03
G/Y
4
3
2
1
4
3
2
1
PEN2N1 L2L1
1PH EC TWIN FAN C/W 149-CD-POT & 149-POT-10
L2 N2
TWIN FAN
BLUE
BROWN
GREEN/YELLOW
1
149-POT-10
5672
GND 10V E1
MIN
E1GND
ST1
ST2
149-CD-POT
A1 GND 10V
E1
N1
L1
BROWN
BLUE
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
*JUMPER REMOVED WHEN EXTERNAL
CONTROL SOURCE IS USED.
POWER CONTROLS
FOR USE WITH:
SQT100-1ECL
SQT125-1ECL
SQT150-1ECL
SQT200-1ECL
SQT250-1ECL
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
JUMPER
REMOVED*
MAX SPEED
TRIMMER
MAX
CONTROLS
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
REMOVE LINK WHEN USING
EXTERNAL POTENTIOMETER OR
EXTERNAL CONTROL SIGNAL
POTENTIOMETER FOR SINGLE
SPEED ADJUSTMENT OR MAX
SPEED SELECTION
POWER
BLUE
BROWN
L1 N1 E1 10V
GND
A1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
GREEN/YELLOW
BROWN
BLUE
TWIN FAN
N2
L2
1PH EC TWIN FAN C/W 149-CD-POT
L1 L2N1 N2 PE
1
2
3
4
1
2
3
4
G/Y
FOR USE WITH:
SQT100-1ECL
SQT125-1ECL
SQT150-1ECL
SQT200-1ECL
SQT250-1ECL
EC
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-000236-CD Issue A: 20.06.2018
Check the individual product accessories table for fan controller compatibility.

Tel [phone] Fax [phone] Email [email protected] Website eltafans.com8
Wiring Diagrams
152-02298951
BLUE
L1 L2 N2N1 111 141 112 142 GND10V D1E1 A1
9 10 11 12821 3 7654
BLUE
BROWN
E
N
L
ACO PANEL
TWIN FAN
220 - 240V 1PH 50Hz SUPPLY
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E)
BROWN
BLUE
BROWN
GREEN/YELLOW
GREEN/YELLOW
GREEN/YELLOW
GREEN/YELLOW
L1 L2 N2N1 111 141 112 142
BLUE
BROWN
TWIN FAN
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E)
BLUE
BROWN
BLUE
BROWN
220 - 240V 1PH 50Hz SUPPLY
ACO PANEL
LNE
4 5 6 731 2 8 1211109
1 149-POT-105672
A1E1 D110V GND
ALL WIRING AND CONTROL EQUIPMENT MUST COMPLY TO THE
LATEST IEE REGULATIONS, IN PARTICULAR PART 552-01-02/03
18/08/2014
MK-152-02298951 Issue: Saved Date:A
BLUE
L1 L2 N2N1 111 141 112 142 GND10V D1E1 A1
9 10 11 12821 3 7654
BLUE
BROWN
E
N
L
ACO PANEL
TWIN FAN
220 - 240V 1PH 50Hz SUPPLY
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E)
BROWN
BLUE
BROWN
GREEN/YELLOW
GREEN/YELLOW
GREEN/YELLOW
GREEN/YELLOW
L1 L2 N2N1 111 141 112 142
BLUE
BROWN
TWIN FAN
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-ACO14E)
BLUE
BROWN
BLUE
BROWN
220 - 240V 1PH 50Hz SUPPLY
ACO PANEL
LNE
4 5 6 731 2 8 1211109
1 149-POT-105672
A1E1 D110V GND
ALL WIRING AND CONTROL EQUIPMENT MUST COMPLY TO THE
LATEST IEE REGULATIONS, IN PARTICULAR PART 552-01-02/03
18/08/2014
MK-152-02298951 Issue: Saved Date:A
EC
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-02298951 Issue A: 18.08.2014
Check the individual product accessories table for fan controller compatibility.

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 9
Wiring Diagrams
152-02298951-CD
20/06/2018
MK-152-02298951-CD Issue: Saved Date:A
ALL WIRING AND CONTROLS EQUIPMENT MUST COMPLY TO THE
LATEST IET REGULATIONS, IN PARTICULAR PART 552-01-02/03
CONTROLS
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
FOR USE WITH:
SQT315-1ECL
STDR315-1EC
REMOVE LINK WHEN USING
EXTERNAL POTENTIOMETER OR
EXTERNAL CONTROL SIGNAL
POTENTIOMETER FOR SINGLE
SPEED ADJUSTMENT OR MAX
SPEED SELECTION
POWER
BLUE
BROWN
L1 N1 E1
10V GND D1 A1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
GREEN/YELLOW
BROWN
BLUE
TWIN FAN
142
112141111
N2
L2
1PH EC TWIN FAN C/W 149-CD-POT
L1 N1 L2 N2 PE
2
1
4
3
G/Y
5
6
7
8
1
2
3
4
5
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
WAGO BLOCK USED
5
4
3
2
1
8
7
6
5
G/Y
3
4
1
2
PEN2L2
N1L1
1PH EC TWIN FAN C/W 149-CD-POT & 149-POT-10
L2 N2 111 141 112 142
TWIN FAN
BLUE
BROWN
GREEN/YELLOW
1
149-POT-10
5672
GND 10V E1
MIN MAX
E1GND
ST1
ST2
149-CD-POT
A1
D1
GND
10V E1
N1
L1
BROWN
BLUE
POWER
MAX SPEED
TRIMMER
JUMPER
REMOVED*
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
*JUMPER REMOVED WHEN EXTERNAL
CONTROL SOURCE IS USED.
WAGO BLOCK USED.
FOR USE WITH:
SQT315-1ECL
STDR315-1EC
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
CONTROLS
EC
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-02298951-CD Issue A: 20.06.2018
Check the individual product accessories table for fan controller compatibility.

Tel [phone] Fax [phone] Email [email protected] Website eltafans.com10
Wiring Diagrams
152-2MOEA03K1
L1 L2 N2N1 111 141 112 142 GND24V 10V D1 E1
9 10 11 12821 3 7654
BLUE
BROWN
E
N
L
ACO PANEL
TWIN FAN
220 - 240V 1PH 50Hz SUPPLY
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-AC0/18)
BROWN
BLUE
BLUE
BROWN
GREEN/YELLOW
GREEN/YELLOW
L1 L2 N2N1 111 141 112 142
BLUE
BROWN
TWIN FAN
EC TWIN FAN C/W AUTO CHANGOVER PANEL (149-AC0/18)
BLUE
BROWN
GREEN/YELLOW
BLUE
BROWN
220 - 240V 1PH 50Hz SUPPLY
ACO PANEL
LNE
4 5 6 731 2 8 1211109
GREEN/YELLOW
1 149-POT-105672
E1D1
10V24V GND
ALL WIRING AND CONTROL EQUIPMENT MUST COMPLY TO THE
LATEST IEE REGULATIONS, IN PARTICULAR PART 552-01-02/03
06/01/2014
MK-152-2MOEA03K1 Issue: Saved Date:B
EC
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-2MOEA03K1 Issue B: 06.11.2014
Check the individual product accessories table for fan controller compatibility.

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 11
Wiring Diagrams
152-2MOEA03K1-CD EC
20/06/2018
MK-152-2MOEA03K1-CD Issue: Saved Date:A
ALL WIRING AND CONTROLS EQUIPMENT MUST COMPLY TO THE
LATEST IET REGULATIONS, IN PARTICULAR PART 552-01-02/03
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
FOR USE WITH:
SQT400-1ECL
SQT500-1ECL
STDR400-1EC
STDR500-1EC
REMOVE LINK WHEN USING
EXTERNAL POTENTIOMETER OR
EXTERNAL CONTROL SIGNAL
POTENTIOMETER FOR SINGLE
SPEED ADJUSTMENT OR MAX
SPEED SELECTION
CONTROLS
POWER
BLUE
BROWN
L1 N1 GND
24V 10V D1 E1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
GREEN/YELLOW
BROWN
BLUE
TWIN FAN
142
112141111
N2
L2
1PH EC TWIN FAN C/W 149-CD-POT
L1 N1 L2 N2 PE
2
1
4
3
G/Y (X2)
5
6
7
8
1
2
3
4
5
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
WAGO BLOCK USED.
200 - 277V 1PH 50Hz
MAINS SUPPLY
(SEE ACO NOTE)
FOR USE WITH:
SQT400-1ECL
SQT500-1ECL
STDR400-1EC
STDR500-1EC
JUMPER
REMOVED*
MAX SPEED
TRIMMER
CONTROLS
POWER
BLUE
BROWN
L1 N1 GND
24V 10V D1 E1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
2 7 6 5
149-POT-10
1
GREEN/YELLOW
BROWN
BLUE
TWIN FAN
142
112141111
N2
L2
1PH EC TWIN FAN C/W 149-CD-POT & 149-POT-10
L1 N1 L2 N2 PE
2
1
4
3
G/Y (X2)
5
6
7
8
1
2
3
4
5
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
*JUMPER REMOVED WHEN EXTERNAL
CONTROL SOURCE IS USED.
WAGO BLOCK USED.
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-2MOEA03K1-CD Issue A: 20.06.2018
Check the individual product accessories table for fan controller compatibility.

Tel [phone] Fax [phone] Email [email protected] Website eltafans.com12
Wiring Diagrams
152-2MOEA03K3 EC
1 2 67 5
149-POT-10
24V 10V GND D1 E1
2L3
FAN
FAN 1
TO MOTOR
GREEN/YELLOW
GREEN/YELLOW
1L1 1L2 1L3 142141 112
2L1 2L2
FAN 2
BROWN
BLACK
GREY
BLUE
GREEN/YELLOW
380 - 440V 3PH 50 Hz SUPPLY
ACO PANEL
TERMINAL BOX
ACO PANEL TYPES:
AC03/B AC03/BDV
AC03/BV AC03/BO
AC03/BD AC03/BDVO
L1 L2 L3 N E
FAN1FAN2
ONLY APPLICABLE
TO SUFFIX
'O'
MODELS
'V'
MODELS
ENABLE
VFC
FAIL
N/O
5 4 3 26E 7 1 W W V U L1 L2 L3 N E
AC03/BDO
FULL SPEED CONFIGURATION - WITH ACO PANEL
111
UV
ENL3L2L1UVWW17E 6 2345
FAIL
N/O
ENABLE
VFC
'V'
MODELS
'O'
MODELS
ONLY APPLICABLE
TO SUFFIX
FAN2 FAN1
ENL3L2L1
ACO PANEL
TERMINAL BOX
ACO PANEL TYPES:
AC03/B AC03/BDV
AC03/BV AC03/BO
AC03/BD AC03/BDVO
380 - 440V 3PH 50 Hz SUPPLY
GREEN/YELLOW
BLUE
GREY
BLACK
BROWN
FAN 2
2L22L1 112141 142
1L31L2
FAN
2L3 E1D1
GND10V24V
UV
FULL SPEED CONFIGURATION - WITH ACO PANEL
111
AC03/BDO
ALL WIRING AND CONTROL EQUIPMENT MUST COMPLY TO THE
LATEST IEE REGULATIONS, IN PARTICULAR PART 552-01-02/03
06/01/2014
MK-152-2MOEA03K3 Issue: Saved Date:B
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-2MOEA03K3 Issue B: 06.01.2014
Check the individual product accessories table for fan controller compatibility.

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 13
Wiring Diagrams
152-2MOEA03K3-CD EC
20/06/2018
MK-152-2MOEA03K3-CD Issue: Saved Date:A
ALL WIRING AND CONTROLS EQUIPMENT MUST COMPLY TO THE
LATEST IET REGULATIONS, IN PARTICULAR PART 552-01-02/03
380-480V 3PH 50Hz
MAINS SUPPLY (SEE ACO NOTE)
FOR USE WITH:
SQT500-3ECL
STDR500-3EC
JUMPER
REMOVED*
MAX SPEED
TRIMMER
CONTROL
POWER
1L1 GND
24V 10V D1 E1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
2 7 6 5
149-POT-10
1
GREEN/YELLOW
TWIN FAN
142
112141111
3PH EC TWIN FAN C/W 149-CD-POT & 149-POT-10
2
1
4
3
G/Y (X2)
7
8
9
10
1
2
3
4
5
1L2 1L3 2L32L2
2L1
5
6
L1 L2 L3 L1 L2 L3 PE
BROWN
GREY
BLACK
BROWN
GREY
BLACK
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
*JUMPER REMOVED WHEN EXTERNAL
CONTROL SOURCE IS USED.
WAGO BLOCK USED
380-480V 3PH 50Hz
MAINS SUPPLY (SEE ACO NOTE)
FOR USE WITH:
SQT500-3ECL
STDR500-3EC
REMOVE LINK WHEN USING
EXTERNAL POTENTIOMETER OR
EXTERNAL CONTROL SIGNAL
POTENTIOMETER FOR SINGLE
SPEED ADJUSTMENT OR MAX
SPEED SELECTION
CONTROL
POWER
1L1 GND
24V 10V D1 E1
149-CD-POT
ST2
ST1
GND E1
MAXMIN
E110VGND
GREEN/YELLOW
TWIN FAN
142
112141111
3PH EC TWIN FAN C/W 149-CD-POT
2
1
4
3
G/Y (X2)
7
8
9
10
1
2
3
4
5
1L2 1L3 2L32L2
2L1
5
6
L1 L2 L3 L1 L2 L3 PE
BROWN
GREY
BLACK
BROWN
GREY
BLACK
NOTE:
AUTO CHANGE-OVER PANEL NOT
SHOWN FOR CLARITY.
WAGO BLOCK USED.
All wiring and control equipment must comply to the latest IEE regulations, in particular part 552-01-02/03.
MK-152-2MOEA03K3-CD Issue A: 20.06.2018
Check the individual product accessories table for fan controller compatibility.

Tel [phone] Fax [phone] Email [email protected] Website eltafans.com14
EC Declaration of Conformity EC Declaration of Incorporation
Description of Equipment:
Building Services Ranges - Air movement fan
Equipment model numbers for safe area fans:
SCP, SPA, SAX, SCD, SDA, SCC, SLC, SCPP, SPP, SAMF, HIT, SEM,
SEL, ISEO IMF, SH, SSD, SQS, SQSDCV, SQU, SMB, STD, SQT, SQT-
DCV, SCH, SCHT, SSDR, SSDRDCV, STDR, STDRDCV, SB, SQU-HT,
SSQU-HT, SDF, ZFHIC, SRC, CF, TF
Relevant / applied directives:
Machinery directive 2006/42/EC, Low voltage directive 2014/35/EU
Relevant / applied directives where applicable:
Energy related products directive 2009/125/EC (when used in Europe)
Electromagnetic compatibility directive 2014/30/EU (where driven via
Inverter)
Relevant / applied directives where applicable:
BS EN ISO 12100 : 2010
BS EN 14694 : 2003 + A1 : 2011
BS EN 308:1997
BS EN ISO 5801:2008
In accordance with the Machinery Directive 2006/42/EC;
The design of the partly completed machine, listed above, complies
with the Essential Health and Safety Requirements (EHSRs) of ANNEX
I, sections 1.1.2, 1.1.5, 1.4.1, 1.5.1 in EC Machinery Directive 2006/42/
EC.
Machinery is incomplete and must not be put into service until such
time as the machinery which is partly complete, is to be incorporated,
and has been assessed and Declared in Conformity with the provi-
sions of any relevant parts of the Machinery Directive.
We undertake to transmit, upon reasoned request by appropriate na-
tional authorities, relevant information relating to the partly completed
machinery identified above.
Manufacturer:
Elta Fans Limited
46 Third Avenue
Pensnett Trading Estate
Kingswinford
West Midlands
DY6 7US
United Kingdom
Date / Signature of Manufacturer: Document last revised: 28th March 2017
Name / Position of Signatory: Mr. Robert Rees Q.A.Manager Elta Fans Ltd
This is an electronic document and is valid without a signature or date. Issue Status B
Herewith we declare that the air movement equipment below, on the basis of its design and construction as partly completed
machines brought onto the market complies with relevant health and safety requirements of the EC Directives stated below. In the
event that alterations are made to the machinery without prior consent from Elta Fans Ltd, this declaration becomes invalid.
EC Declaration of
conformity/incorporation

Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication.
Confirmation of dimensions and data will be supplied on request. 15
Notes
QUIETFLOW
TWIN SQT

Tel [phone] Fax [phone] Email [email protected] Website eltafans.com16
Notes
QUIETFLOW
TWIN SQT

535-IOM0031 Issue A
eltafans.com
Tel [phone]
Fax [phone]
Email [email protected].uk
46 Third Avenue, Pensnett Trading Estate, Kingswinford,
West Midlands, DY6 7US United Kingdom
Tel [phone]
Fax [phone]
Email [email protected] /[e-mail]
17 Barnes Wallis Road, Segensworth East Industrial Estate,
Fareham, Hampshire, PO15 5ST United Kingdom
Applied Technology &
Building Services Export
Building Services
BS EN ISO 9001:2015 FM 556465
A member of
HEVAC ASSOCIATION