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3064058_201610
AHU TE
AHUW TE
Commissioning
Filter monitor
Frost stat
- Measure the air flow rate. Check pressure drop. The air flow rate in a unit with free
running fan impeller can be measured at the pressure testing connector provided as
standard.
- Measure the current drawn by the fan motor:
Ensure that motor current and motor rating are not in excess of the figures stated
on the motor type plate. Never permit the fan speed to exceed the maximum
stated, otherwise the overload will destroy motor and fan and detached or flying
fragments could damage other components.
Note
In the case of air-handling units with variable speed motors and/or variable recirculated
air volume, it is important to measure the highest current consumption across the entire
variable speed range.
Note
Damper (accessory)
Check that the dampers and linkage move freely.
Check that the direction of rotation of the drive motor(s) of the damper(s) is correct; if
required reverse the direction-of-rotation switch on the servomotor.
If necessary louver dampers must be insulated by the customer to prevent noise emis-
sions and the formation of condensation water or heat losses.
If the unit is fitted with dampers, comply with the separate installation instructions for
the damper positioning motor supplied.
Damper drive shaft: 15 x 15 mm
Fully open the dampers prior to starting the fan if they are arranged on the
pressure side.
Starting the fan against closed dampers can result in damage to the appliance.
OK
1
2
Frequent starting and stopping is to be avoided.
In case of operation with a frequency converter, it must be checked that the ‘over
modulation’ function on the frequency converter does not lead to an impermissible
increase in the resonance vibration within the operating range (speed range).
The over modulation must be switched off!
Check the tightening torque of the screwed connections after an operating period of
approx. 1 hr.
