Rasonic RC-S70U, Operation Manual & Installation Manual

Page: 28 / 44

6
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 repair to the refrigerating system, the following precautions shall be complied with
prior to conducting work on the system.
2)Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being
present while the work is being performed.
3)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 con-
ditions within the area have been made safe by control 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. non-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 CO
2
fire extinguisher adjacent to the charging area.
6)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.
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 circuit shall be checked for the presence of refrigerant;
WARNING
This symbol shows that this appliance
used a mildly flammable refrigerant.
If the refrigerant is leaked and exposed
to an external ignition source,
there is a risk of fire.
CAUTION
This symbol shows that the operation
manual should be read carefully.
CAUTION
This symbol shows that a service
personnel should be handling
this equipment with reference
to the installation manual.
CAUTION
This symbol shows that inform-
ation is available such as the
operating manual or installation
manual.
Explanation of symbols displayed on the unit(For the unit adopts R32 Refrigerant only):
1.Transport of equipment containing flammable refrigerants
See transport regulations.
2.Marking of equipment using signs
See local regulations.
3.Disposal of equipment using flammable refrigerants
See national regulations.
4.Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
5.Storage of packed (unsold) equipment
Storage package protection should be constructed such that mechanical damage to the equipment inside the package
will not cause a leak of the refrigerant charge.The maximum number of pieces of equipment permitted to be stored
together will be determined by local regulations.
6.Information on servicing