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5.9 Humidifier
General
Switch on the pump only if the tray is filled with water in
order to prevent damage to the slip-ring seal.
In order to warrant protection against a dry running condi-
tion, the pump must switch off when the water level falls
below 20mm above the suction line.
Pull the floating switch cable in or out as appropriate.
The water quality must be hygienically faultless (germ-
free), at least corresponding to drink water quality. Further
more, make sure that condensation water is not recircu-
lated to the drink water net.
The conductivity of the water must lie within the limits as
set by the manufacturer.
The float valve must be set so that the fresh water supply
shuts off at a maximum water level 10 to 20mm below
the overflow nozzle.
UV-radiation can be suitable for a continual air disinfec-
tion.
Chemical disinfection media (biocide) should be used only
when its harmlessness to health in operational concentra-
tions can be verified.
When using additives, it must be ensured that foam is not
produced when mixed with water.
Commissioning
Commissioning tasks are to be carried out in the following
order:
• Clean any foreign objects from the spray humidifier
tank
• Check the spray humidifier for proper condition as well
as possible visible damage (transport and installation
damage).
• Check the nozzle support tubing and nozzles for firm
seating and direction (with or opposed to airstream)
• Inspect spray humidifier pump screen
• Fill water level to 20mm above suction pipe.
• Set dry running condition protection.
The company reserves the right to make design changes without prior notice.
• Fill the system to ca. 10-20mm below the overflow
nozzle
• Set the float valve (slide the float element and adjust
the lever).
• Start equipment operation, initially on the air-side, then
switch on the spray humidifier.
• Check the pump turning direction.
• Set the pump motor over current actuator to rated
current, measure the power input and record in the
protocol
• Check all pipe connections for leak-tightness and re-
tighten as necessary.
• Check the float valve for function.
• Set blow-down device
• Set possible biocide additives
• Operate the spray humidifier for ca. 2-3 hours and
check for function and leak-tightness
Subsequent to commissioning and within the first 700
operating hours, a weekly germ-count should be made of
the circulation water and, as necessary, measures should
be taken to improve the water quality.
Removal from service
The tray, pump and fixtures must be completely emptied
for longer periods of standstill.
5.10 Louver dampers
Commissioning
If multiple dampers are coupled with one another, the
connecting rods should be checked for proper seating and
freedom of movement.
If drive is accomplished by means of a servo-motor, the
rods are to be adjusted so that a rotation angle of 90° is
warranted and the louvers will reach their end position
when closing.
The louver damper positioner can be mounted on the
interior, as well as on the exterior of the housing. It should
be mounted on the interior of those units designed for
outside use, or protected against moisture.
During commissioning, the louvers must be driven to all
required operating positions. The respective louver posi-
tion must correspond to the control drive.
EN.SILVER.110322
www.swegon.com
21
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