NOTE
The instructions included in this document must be followed at all times to guarantee the correct installation,
operation and maintenance of the system. The personnel in charge of installing, operating or servicing must
take the instructions into account at all times. The guarantee will be void if these system instructions are not
followed.
WARNING
MCUA units are specially designed for use in dangerous areas and comply with official regulations related to
the risks of explosion. The equipment might not operate correctly if the operation instructions are not
followed, the equipment is not correctly connected or is modified with no prior authorization, even in the case
of minor modifications.
The MCUA units are marked
Only qualified personnel who understand the regulations related to the risk of explosion can handle this type
of system.
Matched MMC units and evaporators are to be installed in safe areas.
All of Marstair’s equipment, including the complete line of accessories, have been manufactured with the
most rigorous manufacturing processes, quality systems and quality assurance procedures.
The equipment, testing, manufacturing and control activities comply with CEE regulations, in particular, with
current safety regulations. In addition, the materials and standardised components used to manufacture the
equipment comply with the relevant standards and are covered by the corresponding quality certificates.
The design and manufacturing processes of the different Marstair equipment have taken into account the
appropriate regulations and Risk Elimination instructions, in order to comply with the Essential Safety and
Health Requirements.
Whenever allowed by the configuration and manufacturing process, Marstair incorporates the most
appropriate Safety devices directly. If this is not possible at the factory, due to specific assembly or
application conditions, all additional Safety accessories are available and can be installed before starting the
equipment.
These accessories will cover the concept of residual risks described in the regulations.
TEV Limited recommends the installation of MAINTENANCE SWITCHES as a high safety accessory
(appropriate for use in potentially explosive environments, in accordance with Directive ATEX 94/4/CE), with
manual disconnection, allowing safe maintenance activities.
1. Marstair Ltd recommend that personnel working on this equipment be skilled and fully conversant with
the appropriate Air Conditioning, Refrigeration and Electrical practices and have sound knowledge of
current Industrial Safe Working practices.
2. These units are supplied with a dry nitrogen charge and polyolester oil.
Do not open the valves until the system is fully installed.
Do not mix oils or refrigerants.
3. These units contain live electrical components, moving parts and refrigerant under pressure. Always
site out of reach of children and protect from vandalism.
4. The data plates only give information for individual units. For system details add input power and
current of all units, including any heater load.
5. FUSES- for recommended fuse size see indoor unit instructions.
