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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.
5. Air damper check (if it is required). Not fully opened outside air damper rises up the pressure in the system.
Water air heater can freeze if outside air damper does not fully close in not working air handling unit. Mounting
and running of air damper should be checked and regulated.
6. Air filter clogging check. Change air filters when air filter clogging is indicated. We recommend changing
filters at least twice per year: before and after heating season or more
Filters are one time used. We do not recommend cleaning them. Stop the air handling unit before changing
filters.
7. Pressure sensor setting, which indicates impurity of filters. Pressure sensor is set according to EN
13779:2007 standard: 100 Pa for small systems, 150 Pa for big systems. Remove cover from the pressure
sensor and turn the cursor due to proper position. The indicator will turn on when filters will be clogged.
•
One of pressure sensors shown in 4 Picture can be mounted in the air handling unit.
•
Close the door after pressure sensor regulating process. Be sure that sensor does not indicate impurity
of clear filters.
•
Pressure sensors in the air handling units up to size 900 are regulated and set in factory.
1
Clogged filters unbalance ventilation system, air handling unit uses more power.
UAB AMALVA we reserve the right to make changes without prior notice
Pressure sensor
.
1
4 Picture
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