37
Heat exchangers
1
Filter monitor, HUBA 604
Function: When the filter gets too dirty, an alarm will be triggered.
Verification: Open the cover for the filter cassette and put a piece of cardboard (approximately
half the size of the filter) under the filter for top-mounted heat exchangers, and
on the far side from the fan for side-mounted heat exchangers. Turn the fan on
and the alarm should go off. Turn the fan off, remove the cardboard and turn the
fan back on and the filter monitor must not give an alarm.
Adjustment: The setting depends on the size of the heat exchanger. The settings from the
factory should not be changed.
Note: The pressure drop of the filter monitor is measured over the filter plus the heat exchanger
2
Pressure switch, HUBA 625
Function: When the fan stops, the pressure drops and an alarm will be trigged off.
Verification: Turn the fan on and the pressure switch must not give an alarm. Shut the fan
down and the alarm should go off
Adjustment: Setting is same for all sizes of heat exchangers for DMI 180-400. The settings from
the factory should not be changed
3
Thermostat, Trafag MST 9515
Function: Gives an alarm if the air intake temperature is above the maximum allowable
temperature for the specific DC-motor
Verification: Open the casing and turn the adjustment knob. The alarm should go off when the
setting gets below room temperature. Remember to set the knob back to the
same position again
Adjustment: The setting is dependent on size and type of the DC-motor. The settings from the
factory should not be changed
4
Temperature regulator, Samson 43-6
Function: A self-regulated temperature regulator that requires no auxiliary energy. Sets the
water flow to obtain a set temperature
Verification: Only to be done by trained personnel from Samson. If done wrongly, the
thermostat might be destroyed
Adjustment: Contact ABB
5
PT100, Inor RNT8
Function: For measuring the temperature of the cooling air
Verification: Compare the readings with another thermometer
Adjustment: N/A
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