Introduction
© robatherm 3
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Safety Instructions
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Caution
Serious bodily injuries and even loss of life and material damage can result from non-
observation of the following instructions of the valid national and international safety
regulations.
Even if the unit is switched off, certain regulating functions can lead to sudden switching on
of unit components such as e.g. resumption of power supply, compressor pump-out, fan
overshoot, frost protection, timer programs.
When the fan is in operation, there is perilous voltage on the permanent-magnet
synchronous motor --> danger to life.
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Do not commission ATEX units until the following requirements are met:
Conditions of use in accordance with the purpose for which the unit is intended.
No substances nearby that are prone to spontaneous combustion e.g. pyrophoric
substances under EN 1127-1.
Constant and adequate ventilation of the installation site (mechanical equipment room)
in the case of ATEX units without a specified exterior ex zone so that unavoidable
leakage to the exterior of the unit does not result in an explosive atmosphere.
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Only enter the unit or work on it when the following conditions are met:
All-pole disconnection of power supply.
Minimum waiting period of frequency converter 15 minutes (due to remaining voltage).
Protected against switching on by installations in accordance with DIN EN 60204 (VDE
0113) (e.g. lockable service switch).
Standstill of all moving parts, especially fan impeller, belt drive, motor, rotary heat
exchanger.
Heat exchanger and hydraulic systems adapted to ambient temperature.
Pressure bearing systems must be free of pressure.
Wear protective clothing.
No explosive atmosphere present. (rinse unit beforehand if necessary)
The following requirements must be met before the unit is switched on:
Protective devices must be fitted and effective in accordance with DIN EN ISO 12100
(e.g. protective grille).
Check that no persons are in the danger area, e.g. inside the unit.
Work must only be carried out by a qualified expert.
The floor loading in the AHU must not exceed 100 kg/m² of floor surface.
Basically, the units’ roof is not designed to any additional load. In case of need, please
contact robatherm directly.
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