Information Servicing - CANVAC T-Series Installation Manual

INFORMATION SERVICING

1. Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is
minimised. For repairing the refrigerating system, the following precautions shall be taken prior to conducting work on the system.
2. Work procedure
Works shall be carried out under controlled procedures so as to minimise the risk of flammable gas or vapour being present while the
work is being performed.
3. General work area
All maintenance staff and others working in the nearby area shall be instructed as to the nature of the work being carried out. Work in
confined spaces shall be avoided. The area around the work space shall be sectioned off. Ensure that the conditions within the area
have been made safe in regards to the controlling of flammable material.
4. 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 flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants,
i.e. no sparking,
adequately sealed or intrinsically safe.
5. 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 CO2 fire extinguisher adjacent to the charging area.
6. No ignition sources
No person carrying out work on or near a refrigeration system involving exposing any pipes that contain or has contained flamma-
ble 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, repair, removal 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 there are no flammable hazards or ignition risks. NO SMOKING signs shall be displayed.
7. 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.
8. 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 circuits shall be checked for the presence of refrigerant; marking of
the equipment shall continue to be visible and legible.
• marking 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.
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