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HHCompact Air Handling Units
•
The AHU with recirculation damper is therefore NOT
suitable for modulating operation of the recirculation
damper. This is due to the non-guaranteed damper
authority and the fan position in the AHU relative to
the recirculation damper.
AHU with control
The recirculation damper is supplied with an open/closed
actuator with spring return (24 V). The control used for
the recirculation damper is an open/closed control.
4.10 - Fan
Remove after
transport
CAUTION: The air flow may cause stationary parts to move
(even a fan that is switched off)!
•
Remove the transport brackets. This is indicated by a
label on the door.
•
Check if the fan can move freely without obstructing
the frame, flexible connection or wiring.
•
Check for possible condensate/moisture. Condensate
may form in the period before the first AHU start-
up as a result of weather change and/or humid air
from the building. Remove all condensate from
the construction components and dry the electrical
components using warm (dry) air (e.g. with a drier)
•
This applies to both motor and frequency converter.
•
Check the connection voltage.
•
Check and/or connect the motor in accordance with
local instructions and the data of the supplier.
•
Check the direction of rotation of the impeller. The
direction is indicated on the fan by an arrow.
•
Separately measure the current draw of the electric
motor for all phases. The value of all phases must
be approximately the same and agree with the
nameplate data. Set the motor protection device to
the nominal value.
•
The motor data shown is for an altitude of up to 1000
m above sea level and an ambient temperature of
40°C maximum.
•
The data for belt type, belt tension, number of belts,
size and pulley type is given on a sticker on the fan
housing.
•
If the fans are shut down for long periods (longer
than three months), the bearings may be damaged.
To prevent this it is recommended to reduce the fan
belt tension or to remove the fan belts temporarily.
When the fans are restarted the belt tension has to
be reset to the specified value. This type of damage
can also be prevented by controlled rotation of the
fan impeller
This is recommended for direct-drive fans.
•
Check if the flexible connection is correctly installed.
•
If used, check the pressure switch and set the correct
•
pressure.
•
Check the operation of the main switch.
CAUTION: While working on the fan the switch has to be
locked open.
•
The warning pictograms on rotating parts, electrical
voltage and opening doors are attached to the door.
! Waarschuwing !
Voor openen deuren, ventilator
uitschakelen, spanningsloos
maken en uit laten lopen
(minimaal 2 minuten).
Transportbeugels
Verwijder transportbeugels voor
opstarten ventilator.
! Warning !
Before opening the doors, switch
off and deenergise the fan and
allow it to run down
(minium 2 minutes)
Transport brackets
Remove transport brackets before
starting up the fan.
! Attention !
Avant ouverture des portes, le
ventilateur doit être déconnecté
et avoir eu le temps, de s’arrêter
completement
(2 minutes minimum)
Fixations de transport
Retirer les fixations de trans-port
avant la mise en route.
! Gefahr !
Vor Öffnen der Türen den
Ventilator abschalten, span-
nungslos machen und zum
Stillstand kommen lassen
(mindestens 2 Minuten warten).
Transportsicherungen
Transportsicherungen vor der
Inbetriebnahme demontieren.
200034906
If the machine has stopped due to an unexpected power
supply failure, avoid sudden re-starting. The control
system must include an appropriate protection device.
General data, fan motor
Insulation class motor : F
PTC trip temperature : 155°C
Connection voltage : 3 x 230 V/50 Hz
3 x 400 V/50 Hz
3 x 690 V/50 Hz
The fan motor must have a power supply of 230 V, 3 ph,
50 Hz or 400 V, 3 ph, 50 Hz. The connection must be
made with short circuit protection (fuses) and a thermal
motor safety switch, matched to the nominal current of
the motor. The AC motor can also be protected against
overheating by three series-connected PTC thermistor
fuses, installed in the windings. If a frequency converter is
