Bimar DEU315 Notice D'instructions page 43

Prior to work taking place, the area around the equipment is to
be surveyed to make sure that there are no flammable hazards
or ignition risks. No Smoking signs shall be displayed.
1.1.8 Ventilated area. Ensure that the area is in the open or that
it is adequately ventilated before breaking into the system or
conducting any hot work.
a degree of ventilation shall continue during the period that the
work is carried out. The ventilation should safely disperse any
released refrigerant and preferably expel it externally into the
atmosphere.
1.1.9 Checks to the refrigeration equipment. Where electrical
components are being changed, they shall be fit for the
purpose and to the correct specification. At all times the
manufacturer's maintenance and service guidelines shall be
followed. If in doubt consult the manufacturer's technical
department for assistance.
The following checks shall be applied to installations using
flammable refrigerants. The charge size is in accordance with the
room size within which the refrigerant containing parts are
installed; the ventilation machinery and outlets are operating
adequately and are not obstructed; if an indirect refrigerating
circuit is being used, the secondary circuit shall be checked for
the presence of refrigerant; marking to the equipment
continues to be visible and legible. markings and signs that are
illegible shall be corrected; refrigeration pipe or components are
installed in a position where they are unlikely to be exposed to
any substance which may corrode refrigerant containing
components, unless the components are constructed of
materials which are inherently resistant to being corroded or are
suitably protected against being so corroded.