Table of Contents
Advertisement
A Series Inverter Modular Air-cooled Chiller (Heat Pump)
■ 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 confined 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 flammable
material.
■ Checks on refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure
the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment
being used is suitable for use with flammable refrigerants.
■ Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate
fire extinguishing equipment shall be available to hand. Have a dry powder or CO
adjacent to the charging area.
■ No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work
that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner
that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking,
should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during
which flammable 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 flammable hazards or
ignition risks. "No Smoking" signs shall be displayed.
■ 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.
■ Checks on 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:
(1) The charge size is in accordance with the room size within which the refrigerant containing parts
are installed;
(2) Tthe ventilation machinery and outlets are operating adequately and are not obstructed;
(3) If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the
presence of refrigerant;
(4) Marks of the equipment continue to be visible and legible. Markings and signs that are illegible shall
be corrected;
(5) 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.
39
fire extinguisher
2
Advertisement
Table of Contents
