Daikin R32 SPLIT Serie Manuel D'installation page 23

SPECIAL PRECAUTIONS WHEN DEALING WITH R32 UNIT
R32 charge, kg
Model for 7.5m piping
ATXC20B - ARXC20B
ATXC25B - ARXC25B
ATXC35B - ARXC35B
ATXC50B - ARXC50B
ATXC60B - ARXC60B
ATXC71B - ARXC71B
* Calculation based on Installation Height of 1.8m
* Max. Allowable Length (L),m for:-
ATXC20/25/35B-ARXC20/25/35B:20
ATXC50/60/71B-ARXC50/60/71B:30
• Installation of pipe work shall be kept to a minimum and pipe work shall be protected from physical damage and shall
not be installed in an unventilated space.
• Reusable mechanical connectors and flare joints shall be accessible for maintenance purposes.
Prior to installation, ensure risk of ignition is minimised and avoid working in confined space.
Ensure adequate ventilation is available by opening windows or doors.
● When flared joints are reused indoors, the flare part shall be re-fabricated.
● A void installation of the air conditioner in a place where there is danger of exposure to continuously
operating open flames (for example an operating electric heaters).
● Any person who is involved with working on or breaking into a refrigerant circuit should hold a current
valid certificate from an industry-accredited assessment authority, which authorises their competence to
handle refrigerants safely in accordance with an industry recognised assessment specification.
● 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. nonsparking, adequately sealed or
intrinsically safe.
● 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
to the charging area.
● No ignition sources
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. "No Smoking" signs shall be displayed.
● The following checks shall be applied to installations:
– 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.
● Initial safety checks shall include:
– that capacitors are discharged, this shall be done in a safe manner to avoid possibility of sparking
– there shall be no live electrical components and wiring are exposed while charging, recovering or
purging the system;
Minimum floor area,
Xm (based on 7.5m
2
piping)
0.55 0.29
0.55 0.29
0.75 0.54
1.00 0.95
1.10 1.15
1.15 1.26
WARNING
1-21
R32 charge, kg for Minimum floor area, Xm
max allowable (based on max allowable
pipe length*
0.76
0.76
0.96
1.38
1.48
1.53
fire extinguisher adjacent
2
2
pipe length*)
0.55
0.55
0.88
1.82
2.10
2.24