Komfovent VERSO CF 1000 UH, Installation And Maintenance Service Manual

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UAB KOMFOVENT we reserve the right to make changes without prior notice
V_20-09
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6. FINAL CHECK BEFORE OPERATING AHU
Before turning on the AHU:
• Check there is no garbage, debris, or tools left inside. Clean the interior of AHU if needed.
• Check that all needed cables, wires and connectors between sections or external components are
connected.
• Make sure there is no humidity or condensate on electrical connectors and electrical parts (electron-
ics, motors, frequency inverters). Dry or replace affected components if needed.
• Check that air closing dampers can be fully opened and closed
• Check that all needed air filters are installed
• Check that all piping to the water coils are connected
• Check that condensate drain (if used) is correctly installed. Fill siphons with water.
• Close all the doors, fix all removable covers.
• Inspect ducting system: check there are no fully closed diffusers or regulation dampers; intake and
outlet grills are not blocked.
7. MAINTENANCE
It is recommended to carry out routine maintenance of the air handling unit, 3–4 times per year.
VERSO R 1300 F, 2000 F use the key to open the door. Do not release the door to swing freely, but open it
slowly at a 90 degree angle. Be careful while opening, because clogged filters might fall out.
The inspection must also include:
1. Rotary heat exchanger check.
Inspection of the rotary heat exchanger is performed once per year. Free
rotation of the rotary heat exchanger, continuity of the rotating belt, absence of damages of the rotor
drums and the seal gasket are checked. It is necessary to check the stretch of belt. Free belt will slide and the
efficiency of rotary heat exchanger will fall down. To reach maximal efficiency, rotor must turn at
least 8 times per minute. Polluted heat exchanger will decrease efficiency. Clean heat exchanger
with an air blast or wash with tepid water. Check out water falling on the electric motor.
2. Plate heat exchanger check. Inspection and dedusting of the plate heat exchanger is performed
once per year (it is removed from the unit and blown with an air blast or washed with tepid water).
Note: plate heat exchanger may be replaced with summer cassette, when recuperation is needless.
3. Fans check (once per year). Polluted fans decrease efficiency.
Before performing any inspection work, check whether the unit is
switched off from the electric power supply.
Fans should be carefully cleaned with textile or soft brush. Do not use water. Do not break balance.
Check if direction of fan turns is right, because wrong direction of turns gives only 30% rating. Check
if fan freely rotates and is not mechanically damaged, if impeller does not touch suction nozzles, fan
does not spread noise, the pressure tubes are connected to the nozzle (if it is required), mounting
bolts are screwed.
The rubber couplings connecting the motor base and the unit should be visually inspected for signs
of wear and replaced as necessary.
Any unusual noise or vibration when the fan is running should be immediately investigated, as this
usually an indication of wear or imbalance in the fan system.
4. Air heater check.
Recommended to perform periodical inspection and cleaning of heater. Check
the plates of water air heater. The air heater is cleaned with hoover from supply air side or with air
blast from exhaust air side. If it is very dirty, wash with tepid water, which will not make corrosion of
aluminium. Check if position of return water temperature sensor is right. Check if electric air heater
is properly fixed, wires connections are not damaged and heating elements are not bent. They can
be damaged or bent due to uneven heat or uneven and turbulent air direction. Check if electric air
heater is clear of unnecessary things and heating elements are not clogged, because this can cause
unpleasant smell or in the worst case – dust can start burning. Heating elements can be cleaned
with hoover or wet textile.