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EIOM v2018.04
14. CHECKLIST FOR UNIT START-UP AND MAINTENANCE
Periodically check, clean and repair (if necessary) all AHU components. Proper maintenance ensures a long service life of the unit. Document and
keep all maintenance works journal in a well-known place.
• Device can be started only by trained and qualified personnel;
• Unit (with built-in control system) is prepared for work only when voltage is supplied to control panel and selected accessories are connected and
when ventilation device is fully connected to the duct system;
• Before starting device, inspect:
FUNCTIONAL COMPONENT OF
THE DEVICE
INSPECTED ITEMS
Supply and extract air fan
Check cable connectors
Check if there are no foreign objects or waste in the fan section. If yes, remove it.
Check if the fan is connected to the power source in accordance with the basic connection diagram.
Pay special attention to the thermal protections.
Check if the bearings of fans rotate freely (move blades by hand).
Check if cables used for connecting fan meet the safety requirements and long term current load
capacity (A)
Check fan grounding
Check if fans safety switch is turned ON **
Check if fan is attached firmly.
Electric heater **
Check connectors of the electric heater connection cable.
Check if there are no foreign objects or waste in the heater section. If yes, remove.
Check if cables used for connecting electric heater meet the safety requirements and long term cur-
rent load capacity (A).
Check if the electric heater is connected to the power source in accordance with the basic connection
diagram. Pay special attention to the connection of the thermal protections.
Check grounding of the electric heater.
Check if the tubes of the thermal protections of the electric heater do not contact the heating elements.
Check if the cables are installed through the seals of the electric heater. If cables do not contact the
heating elements.
Water heater **
Check if fully connected and filled water heater does not leak.
Check if anti-freeze protections is properly installed and connected.
Check if anti-freeze temperature sensor is attached on the return pipe of the water heater.
Check capillary thermostat. It must be installed after the water heater and its adjustment knob must
be turned at +5°C.
Check if the actuator of the circulation pump and valve are connected in accordance with the basic
electrical diagram.
Check if the circulator pump is grounded.
Rotory heat exchanger **
Check cable connectors of rotor motor.
Check if there are no foreign objects or waste in the rotary heat exchanger section. If yes, remove.
Check if cables used for connecting rotor motor meet the safety requirements and long term current
load capacity (A).
Check if the rotor motor is connected to the power source in accordance with the basic connection
diagram.
Check if the rotor motor is grounded.
Check if the belt of the rotary heat exchanger is sufficiently tensioned, does not stuck and has no
signs of mechanical damage.
Check if the rotary heat exchanger is stable, rotates and is not stuck (move by hand).
Check if the rotor rotation sensor is installed and connected properly. Maximum distance between the
sensor and rotor – 20 mm. **
Check if the cables do not contact and do not rub against the heat exchanger.
Plate heat exchanger **
Check if there are no foreign objects or waste in the plate heat exchanger section. If yes, remove.
Check if the drainage system is installed correctly. If it does not leak.
Check if the by-pass actuator of the plate heat exchanger is connected to the power source in accor-
dance with the basic connection diagram.
Check if by-pass valve of the plate heat exchanger opens smoothly. No jamming.
