Precautions On Refrigerant Leakage; Turn Over To Customer - Rinnai DONSR20Z9 Operation & Installation Manual

INSTALLATION OUTDOOR

22. PRECAUTIONS ON REFRIGERANT LEAKAGE

This air conditioner(A/C) adopts innocuous and non-flammable refrigerant. The location of the A/C should be large
enough that any refrigerant leakage is unable to reach critical concentration. So certain essential action can be
taken on time.
•
Critical concentration / Max concentration of refrigerant without any harm to person.
•
Refrigerant critical concentration: 0.44[kg/m
Confirm the critical concentration through follow steps, and take necessary actions.
1. Calculate the sum of the charge volume (A[kg]) Total Refrigerant volume of 10HP=factory refrigerant volume
+ super-addition
2. Calculate the indoor volume (B[m
3. Calculate the refrigerant concentration
A [kg]
critical concentration
B [m ]
3
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.

23. TURN OVER TO CUSTOMER

The owner's manual of the indoor and outdoor unit must be given to the customer. Explain the contents in the
owner's manual to the customer in detail.
Rinnai
] for R410A.
3
]) (as the minimum volume.
3
Outdoor unit
Indoor unit
Room full of leak refrigerant
(All refrigerant has run out)
b. Leak alarm related to mechanical ventilator
Indoor unit
(Leak detection siren should be installed)
Figure 46. Refrigerant precaution
A. Ventilation
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