KOJA 0603, Instruction For Operation And Maintenance

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AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
General
8 V. 2.0 2017-02-13
1.5. Safety devices
1.5.1. Anti-freezing thermostat
An anti-freezing thermostat (not included in delivery) is installed in the water space of the heat exchanger, or
on a heat transfer surface of the heat exchanger. The thermostat gives an alarm and stops the unit if the water
temperature in the heat exchanger drops below the set point (e.g., +8
o
C). Always determine the reason for the
tripping of the thermostat. The unit can be restarted by pressing the reset button of the anti-freezing thermo-
stat.
1.5.2. Filter indicator (differential pressure gauge)
A filter indicator (not included in delivery) is installed in the filter section, so that it can measure the pressure
difference across the filter. It indicates the pressure difference and/or gives an alarm. For the purpose of the
filter indicator, please refer to the section covering the filters.
1.5.3. Fire thermostat
A fire thermostat (not included in delivery) is installed in the inlet or outlet duct of the unit. It gives an alarm
(and stops the unit) if the supply air temperature exceeds the set point (e.g., +50
o
C). Always determine the
cause for the tripping of the thermostat, and also check if the fire dampers (if applicable) have been actuated.
The unit can be restarted by pressing the reset button of the fire thermostat.
1.5.4. Flow controller
A flow controller (not included in delivery) is installed in the inlet or outlet duct of the unit. It gives an alarm if
the sensor does not detect air flow. Always determine the cause for the alarm immediately.
CAUTION
Instructions for the operation and maintenance of safety devices are supplied by the
device manufacturers.