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.
