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5.3 Commissioning
Any work on the control system (replacing / removing sensors, checking connections of individual parts etc.) must be
done when the system is not live (after disconnecting the power supply)!
Connecting to the mains power supply
The mains power supply connection can only be performed by persons acquainted with CSN 332000-3 Art. 322.1-BA 5 (and IEC
364-3 Art. 322.1-BA 5) – that is, low-voltage electrical installations. For Slovakia: In compliance with Decree 74/1996 Z.z., and
Decree 57/78 Zb.).
The inspection of the wiring should ideally be carried out once a year, with the required maximum interval once every 3–5 years.
The wiring should be inspected once a year if possible, but no less frequently than once every 3–5 years.
Required protection and mains power supply connection
All units must be connected only as part of a definitive 230 V / 50 Hz 1F power supply system, with protection 1×10 A char. C and
required connection cabling at least CYKY 3J×1.5. The minimum requirement for heaters is 400 V with protection 1×16 A incl. a trip
coil with CYKY 7J×2.5 connection cabling.
Connecting and installing sensors
As part of commissioning the installer must complete a commissioning report, which is used for recording all value settings and the
date of commissioning.
The following must be performed before actual commissioning:
• Visual inspection of the unit
• Inspection of wring including circuitry protection
• Inspection of all peripheral devices such as sensors, thermostats, controllers and external signals for correct connection
• Inspection of air duct connection
• Ceiling-suspended units to be checked for sloping and wall-mounted units for a vertical position
• Inspection of condensate drain line connections
• Inspection of all connected dampers – shut-off, recirculation, bypass
• Inspection of correct supply / exhaust orientation
• Instructing the user on operating the system
5.4 Warranty
The warranty period is in line with the General Terms and Conditions, which means the standard period of 2 years. If customers
would like an extension on the warranty period, it is available as per the table below. Available options and the maximum warranty
period will be provided by the Sales Department. The wiring should be inspected once a year if possible, but no less frequently than
once every 3–5 years.
6. Maintenance and service
6.1 Maintenance and service
General maintenance such as the cleaning of the interior can be done by the user. For servicing related to replacement operations
or work on the electric part of the system use solely the service technicians who are members of the certified network. For the list
see www.atrea.com
• Maintenance consists of visual inspection of the unit, regular filter replacement and the cleaning of the heat recovery
exchanger. Air filters should be replaced at a minimum interval as notified by the controller or as necessary and
required by the rate of pollution of the ambient environment.
• During maintenance observe personal health and safety and use protective equipment (a face mask, packaging for
contaminated filters).
• Before opening the AHU’s door always disconnect the unit from the power supply (using a circuit breaker or fuse disconnector
or by unplugging it from the power socket, if it is connected this way).
• During maintenance observe the safety instructions provided in the manual (“Important Notices“), follow the general rules of
occupational safety and use a suitable means of access to HVAC equipment (ladders, stepladders).
6.2 Replacing G4/F7 air filters – fabric version
● The unit’s ODA fresh air inlet has a filter from expanded metal to be cleaned after its removal from the unit using a water and
detergent solution. It is inserted back into the unit after it has fully dried off. This filter can be replaced by a standard G4 fabric
version.
● The unit’s ETA exhaust air inlet has a G4 fabric frame filter. For the process of replacement including its removal from the unit
see below. This fabric filter with frame can be replaced by a cassette filter.
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