Komfovent DOMEKT RHP 400 U-2.8/2.4, Инструкция по установке и эксплуатации

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UAB KOMFOVENT we reserve the right to make changes without prior notice
RHP-C5.1_21-01
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4. MAINTENANCE
It is recommended to carry out routine maintenance of the air handling unit, 3–4 times per year.
Units are filled with f-gas. Service should be carried out in accordance with the
local laws.
Besides preventive maintenance inspection, the following operations should be performed:
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. 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.
3. 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.
4. 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.
5. Air filter clogging check. Change air filters when air filter clogging is indicated. We recommend to
change filters at least twice per year: before and after heating season, or more
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.
Filters are one time used. We do not recommend clean-
ing them. Stop the air handling unit before changing
filters.
6. Pressure sensor setting, which indicates impu-
rity 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.
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Clogged filters unbalance ventilation system, air handling unit uses more power.
Pressure sensor
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