CYBERHANDLER 2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
EN/05.2019 © STULZ GmbH – all rights reserved
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Handling refrigerants (units with DX Top-up or DX Redundant)
According to EN 378, refrigerants are divided in groups in respect of health and safety: R410a
belongs to Group L1.
• Adherence to the regulations by law and guide-lines.
• Execution only by competent staff.
• Responsability for correct disposal of refrigerant and system parts is incumbent on the
operator.
• Refrigerants have a narcotic effect when inhaled in high concentrations.
• The room is to be evacuated immediately if high concentrations of refrigerant suddenly occur.
The room may only be entered again after adequate ventilation.
• If unavoidable work is required in the presence of a high concentration of refrigerant, breath-
ing apparatus must be worn. This does not mean simple filter masks. Comply with breathing
protection data sheet.
• Safety glasses and safety gloves are to be worn.
• Do not eat, drink or smoke at work.
• Liquid refrigerant must not get onto the skin (risk of burns).
• Only use in well ventilated areas.
• Do not inhale refrigerant vapours.
• Warn against intentional misuse.
• It is absolutely essential to comply with the first aid measures if accidents occur.
Only trained and qualified electricians are permitted to undertake work on the
electrical system
Respect the corresponding EN- and IEC standards for the electrical connection of the
unit and observe the conditions of the power supply companies
• installation, commissioning, maintenance and operation works have to be carried out by
qualified persons only,
• Observance of the regulations for accident prevention,
• Stay out of danger when lifting and setting off the unit,
• The AHU may only be operated with its revision doors and panels (casing) completely closed
• The air-handling unit must always be operated within the range of operating parameters
stipulated in the technical documentation supplied by STULZ.
• Secure the unit to avoid the risk of overturning
• Safety devices may not be bypassed.
• Prior to all work on the AHU – or opening the revision doors – ensure that:
• power supply is shut off (power off all poles) and safeguarded from unauthorized power-
ing on,
• all moving components - in particular - fan impeller, motor, rotary heat exchanger, control
and shut-off dampers – have come to a standstill: wait at least 5 minutes after deacti-
vating the unit,
• Heat exchangers have cooled down to reach ambient temperature,
• No persons are present in danger areas e.g. inside the unit
• Work performed on the AHU requires personal protective equipment (Personal Protective
Equipment),
• The air handled by the equipment must not contain health-endangering, flammable, explo-
sive, aggressive, corrosive or otherwise hazardous constituents, which would otherwise be
distributed by the ducting system or the building and can have a health-impairing or even
fatal effect on personnel, animals or plants living in the building.
