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the unit is closed:
»
remove the filter protective foil,
»
fit the filters in their guides,
»
check condition of the filters and tightness of their fitting in the guides,
»
check settings of differential pressure switches (if any) indicating the accepted difference
in static pressure exceeding of which signals the need of replacing the filter. According to EN
13053, this value is 200Pa for M5 & F7 filters.
13.3. WATER HEATING COIL
Check:
»
condition of heating coil panels,
»
supply and exhaust pipework for correct connection,
»
whether capillar of the thermostat protecting the heat exchanger against freezing is firmly
attached to the heating coil casing,
»
set point of the thermostat protecting the heat exchanger against freezing (factory set point
+ 5°C),
»
whether control valve on heating coils is installed in accordance with markings on its housing.
13.4. WATER COOLING COIL
Check:
»
condition of cooling coil panels,
»
supply and exhaust pipework for correct connection,
»
setting of droplet eliminator in relation to air flow direction,
»
siphon for correct mounting – before starting the unit fill the siphon with water,
»
serviceability of condensate drain system.
13.5. FREON EVAPORATION COIL
Check:
»
condition of cooling coil panels,
»
supply and exhaust pipework for correct connection,
»
setting of droplet eliminator in relation to air flow direction,
»
siphon for correct mounting – before starting the unit fill the siphon with water,
»
serviceability of condensate drain system,
»
after completed installation of the cooling system, and before its filling with a cooling medium,
first perform pressure test, and end-to-end leakage test. The test pressure depends on working
pressure of the medium used,
»
pressure test may only be performed with use of dried nitrogen (air or standard nitrogen for
commercial use brings in too much moisture into the system),
»
leakage test should be carried out very carefully, and if during the subsequent vacuum
production in the system it is impossible to maintain the vacuum conditions, take the pressure
test again.
13.6. ROTARY HEAT EXCHANGER
Check whether:
»
rotor locks are removed,
»
transverse and circumferential seal does not block (interferes with) the rotor operation,
»
motor, controller, speed sensor are properly connected.
13.7. FAN UNIT
Check whether:
»
around the fan there are no objects which could be sucked into rotor once started,
»
fan rotor rotates freely, without rubbing housing parts,
»
motor is properly set and whether the system and operating conditions are compatible with
the data plate (supply voltage, current, frequency, winding connections,
»
motor rotor rotates freely, without rubbing the stator,
