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5. Commissioning & Operation
5.1 Housing/Units
General
Before opening the doors, the fan must be switched off,
the electrical power source disconnected and the system
allowed to come to a standstill (minimum 2 minute wait-
ing period).
The pertinent directives and national regulations are appli-
cable to the electrical installation.
As a matter of principle, the accident prevention regula-
tions must be observed!
A functional inspection of safety measures should be regu-
larly carried out at the rated air volume!
The primary equipment operator is responsible to allow
only those persons to work on the equipment, who are
familiar with the fundamental regulations of occupational
safety and accident prevention, as well as this manual, and
who have been instructed in the handling of a fan.
These operating instructions are to be permanently main-
tained at the on-site location of the air handling unit
deployment.
Commissioning
In order to put the system into service, the equipment
must be completely assembled with all media lines con-
nected and all electrical components properly cabled.
Check all flanges and boltings.
Close drain valves during operation.
Prior to switching on the system, an inspection of the
protective earth conductor must be carried out.
A functional inspection and performance measurement
must be carried out with a written protocol being estab-
lished.
5.2 Fan
Commissioning
Prior to commissioning the fans, the following prerequi-
sites must be fulfilled:
• Connection to the ducting system in place.
• Extract air and supply air lines open.
• Transport protection has been removed.
• Ducting system and equipment chamber free of foreign
objects and contaminants.
• Fan wheel checked for freedom of movement by
manual spin-up.
• All inspection doors are closed.
• V-belt tension checked.
• If using frequence converter, max number of revolutions
on the type plate must be observed.
The company reserves the right to make design changes without prior notice.
After completion, a test run is to be carried out to check
performance and direction of motor rotation.
Check the turning direction against the directional arrow
on the housing by briefly switching on the system. In the
event of an incorrect direction of travel, electrical polar-
ity on the motor must be changed while observing safety
regulations.
After obtaining the fans operating turning speed, immedi-
ately measure the power input from all three phases with
doors closed.
The measured values must not exceed the rated values
(hence, the motor rated performance) depicted on the
type data plate. Shut off the unit immediately if an over-
current situation exists. If a dissimilar phase current exists,
check the motor connection.
The manufacturer's specifications for maximum motor-
ambient temperature should be observed.
Removal from service
For lengthy periods of downtime, the ventilator should be
turned 1x per month in order to prevent one-sided loading
of the bearing.
For periods of downtime longer than 3 months, the v-belt
should be removed in order to prevent spot-loading of the
bearing.
Prior to re-commissioning bearings with a re-lubrication
adapter, remove the old grease and re-lubricate. The direc-
tives of the ventilator manufacturer must be observed.
EN.SILVER.110322
www.swegon.com
17
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