AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Commissioning and maintenance
10 V. 2.0 2017-02-13
2. COMMISSIONING AND MAINTENANCE
2.1. Commissioning
Before commissioning the air handling unit, make sure that the unit has been installed and cleaned according to
the instructions, that the components and safety devices essential for the safe operation of the unit have been
installed properly, and that the flow rates have been adjusted.
The commissioning of the air handling unit and the training of the operating personnel are usually carried out
by the supplier of the air-conditioning plant in question.
WARNING
Observe general and section-specific safety instructions.
Earthing of the access doors
CAUTION
Earthing of the access doors must be checked visually after closing the access doors.
In access doors without hinges the earthing conductor must be connected to a quick
disconnect connector after attaching the door (see picture Earthing of access doors).
CAUTION
The motor of the fan FFTK-xx-AF may become overloaded, if the air volume flow exceeds the
designed level. This may happen if, for example, the air handling unit is switched on before all the
sections of the unit and the ductwork are installed, if the fan is switched on with the access door
open, or if the access door is opened during operation of the fan.
CAUTION
The FFTS casing fan models are not designed to be disassembled. If the fan has to be
disassembled, due to, for example, narrow hauling routes, the fan-motor assembly must
be balanced and the certificate of balancing must be presented, in order to retain the
warranty. If the motor has to be removed or the fan disassembled due to maintenance or
repair work, permission is needed from Koja Ltd’s Warranty Handler. Otherwise, the fan
warranty will be voided.
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