7. PRECAUTIONS ON REFRIGERANT
LEAKAGE
This air conditioner(A/C) adopts inncouous and nonflammable
refrigerant. The locating room of the A/C should big enough
that any refrigerant leakage is unable to reach critical thickness.
So certain essential action can be taken on time.
A[kg]
B[m ]
3
Critical thickness------the Max. thickness of Freon without any
harm to person.
Refrigerant critical thickness: 0.44[kg/m ] for R410A.
3
Confirm the critical thickness through follow steps, and take
necessary actions.
1. Calculate the sum of the charge volume (A[kg]) Total
Refrigerant volume of 10HP=factory refrigerant
superaddition
2. Calculate the indoor cubage (B[m ]) (as the minimum
cubage.
3
3. Calculate the refrigerant thickness
≤
critical thickness
Counter measure against over high thickness
1. Install mechanical ventilator to reduce the refrigerant thickness
under critical level. (ventilate regularly)
2. Install leak alarm facility related to mechanical ventilator if
you can not regularly ventilate.
b. Leak alarm related to mechanical ventilator
A. Ventilation
peristome
(Leak hunting siren should be installed in
places easily keep refrigerant)
Indoor unit
Outdoor unit
Indoor unit
Room full of leak refrigerant
(All refrigerant has run up)
13
8. TURN OVER TO CUSTOMER
The owner's manual of indoor unit and owner's manual of
outdoor or unit must be turned over to the customer. Explain
the contents in the owner’s manual to the customers in details.
Please press “constraint cool” button to carry out refrigerant
recycling process. Keep the low pressure above 0.2MPa, other-
wise compressor may be burnt out.
Fig. 7-1
NOTE
7.1 Important information for the used
refrigerant
This product has the fluorinated gas, it is forbidden to release to air.
Refrigerant type: R410A; Volume of GWP: 2088;
GWP=Global Warming Potential
Attention:
Frequency of Refrigerant Leak Checks
1) For equipment that contains fluorinated greenhouse gases in
quantities of 5 tons of CO
2
equivalent or more, but of less than
50 tons of CO
2
equipment, at least every 12 months, or where
a leakage detection system is installed, at least every 24 months.
2) For equipment that contains fluorinated greenhouse gases in
quantities of 50 tons of CO
2
equivalent or more, but of less than
500 tons of CO
2
equipment,at least every six months, or where
a leakage detection system is installed, at least every 12 months.
3) For equipment that contains fluorinated greenhouse gases in
quantities of 500 tons of CO
2
equivalent or more,at least every
three months, or where a leakage detection system is installed,
at least every six months.
4) Non-hermetically sealed equipment charged with fluorinated
greenhouse gases shall only be sold to the end user where evidence
is provide that the installation is to be carried out by an undertaking
certified person.
5) Only certificated person is allowed to do installation, operation
and maintenance.
Model
Refrigerant/kg
tonnes CO
2
equivalent
2.20
2.35
3.00
3.40
3.80
4.59
4.91
6.26
7.10
7.93
Factory charge
42
kBtu/h
48
kBtu/h
56
kBtu/h
28
kBtu/h
36
kBtu/h