MANDÍK CPV Installation, commissioning, and
maintenance
IZU 06/2021
MANDÍK, a.s., www.mandik.cz
R
39
may only be conducted by qualified refrigeration technicians certified for work with
refrigerants and per the instructions of the condenser unit’s manufacturer.
Check heat exchangers for contamination, leaks and any damage. Remove any contaminants by
blowing down with compressed air or steam. In any case, ensure that the fins of the heat
exchanger are not damaged. and therefore high-pressure compressed air equipment should not
be used for such work. Regularly check the circuit for leaks.
For cold water coils, also check the condition and operation of all condensate pans, the
functionality of the pan drains and the condition and functionality of the trap, and then clean
and fill with water as needed. Before winter, check the functionality of all freeze protection
measures for the condensate drain (if operated during winter and there is the potential for
them to freeze). Check for any deposits or other settled materials, and the condition and
cleanliness of the drip eliminator, which is to be removed and cleaned as needed.
For direct evaporators, check for any freezing of the heat exchanger itself while cooling.
Comply with all applicable environmental protection regulations when disposing of refrigerants
and compressor oil.
9.11
PLATE RECUPERATOR
Operable damper blades must be locked to prevent spontaneous or accidental closure. Never
put your fingers between the blades of an open damper as this is a serious injury hazard!
Check the condition of the recuperator and for contamination, check the functionality of the
dampers, and condensate drain.
Blow down the recuperator with compressed air, steam or a hot water pressure washer to
clean. Ensure that the fins of the heat exchanger are not deformed or damaged by this process.
Check for contamination and damage and the movement of the damper blades. Vacuum up any
dirt deposits. Then clean the surfaces of the damper blades using a damp rag. The plastic gears
on dampers are manufactured from a material that does not require subsequent lubrication.
Use a lubricating spray on the lever mechanism on those dampers with lubricated lever
mechanisms.
Check the condition and operation of all condensate pans, the functionality of the pan drains
and the condition and functionality of the trap, and then clean and fill with water as needed.
Before winter, check the functionality of all freeze protection measures for the condensate
drain (if there is the potential for them to freeze).
9.12
ELECTRIC HEATER
The heating unit contains a heat exchanger with resistor elements, an operating thermostat set
to a fixed value of +50°C and alarm thermostat set to +80°C. The resistor rods are already wired
from the factory and are connected to the terminal blocks with the thermostats. The terminal
block is mounted to the heat exchanger on the operator’s
side.