Operating Procedures - Toyotomi NTN-928R32 User Manual

INSPECTION OF THE SITE
Safety inspection must be taken before maintaining equipment with R32
refrigerant to make sure the risk of fi re is minimized. Check whether the place
is well ventilated, whether anti-static and fi re prevention equipment is perfect.
While maintaining the refrigeration system, observe the following precautions
before operating the system.

OPERATING PROCEDURES

1. General work area:
All maintenance staff and others working in the local area shall be instructed
on the nature of work being carried out. Work in confi ned spaces shall be
avoided. The area around the workspace shall be sectioned off. Ensure that
the conditions within the area have been made safe by control of fl ammable
material.
2. Checking for presence of refrigerant:
The area shall be checked with an appropriate refrigerant detector prior to and
during work, to ensure the technician is aware of potentially toxic or fl ammable
atmospheres. Ensure that the leak detection equipment being used is suitable
for use with all applicable refrigerants, i.e.non-sparking, adequately sealed or
intrinsically safe.
3. Presence of fi re extinguisher:
If any hot work is to be conducted on the refrigeration equipment or any
associated parts, appropriate fi re extinguishing equipment shall be available
to hand. Have a dry powder or CO2 fi re extinguisher adjacent to the charging
area.
4. No ignition sources:
No person carrying out work in relation to a refrigeration system which involves
exposing any pipe work shall use any sources of ignition in such a manner
that it may lead to the risk of fi re or explosion. All possible ignition sources,
including cigarette smoking, should be kept suffi ciently far away from the site
of installation, repairing, removing and disposal, during which refrigerant can
possibly be released to the surrounding space. Prior to work taking place, the
area around the equipment is to be surveyed to make sure that there are no
fl ammable hazards or ignition risks.
'No Smoking' signs shall be displayed.
5. Ventilated Area(open the door and window):
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
GB
87