Caution for Refrigerant Leaks
Si39-303
194
Installation Manual
9. Caution for
Refrigerant Leaks
9.1
Caution for Refrigerant Leaks
9.1.1 Introduction
Points to note in connection with refrigerant leaks
The installer and system specialist shall secure safety against leakage according to local
regulations or standards. The following standards may be applicable if local regulations are not
available.
9.1.2 Maximum Concentration Level
The maximum charge of refrigerant and the calculation of the maximum concentration of
refrigerant is directly related to the humanly occupied space in to which it could leak. The unit of
measurement of the concentration is kg/m
3
(the weight in kg of the refrigerant gas in 1m
3
volume of the occupied space). Compliance to the local applicable regulations and standards of
the maximum allowable concentration level is required. In Australia the maximum allowed
concentration level of refrigerant to a humanly space is limited to 0.35kg/m
3
for R407C and
0.44kg/m
3
for R410A.
Pay special attention to the place, such as a basement, etc., where refrigerant can stay, since
refrigerant is heavier than air.
9.1.3 Procedure for Checking Dangerous Concentration
Check the Dangerous concentration in accordance with steps (1)-(4) below and take whatever
action is necessary.
Step1:
Calculate the amount of refrigerant (kg) charged to each system separately.
Notes:
Where a single refrigerant facility is divided onto 2 entirely independent refrigerant systems then
use the amounts of refrigerant with which each separate system of charged.
O tdoor nit
Indoor nit
Room where
refrigerant leak has
occurred (Outflow
of all the refrigerant
in system).
Direction of refrigerant flow
(Amount of refrigerant
(Additional charging
Total amount of
in a single indoor
+
amount)
=
refrigerant (kg) in
unit system)
the system
Amount of refrigerant with which
the system is charged before
leaving the factory
Amount of refrigerant added
locally in accordance with the
length or diameter of the
refrigerant piping
Summary of Contents for VRV II Series
Page 6: ...Si39 303 iv Table of Contents...
Page 31: ...Si39 303 Installation General Information 25 Flaring Procedure...
Page 124: ...Appendix Si39 303 118 General Information 3P114237A...
Page 141: ...Si39 303 Appendix General Information 135 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 4D040338A...
Page 142: ...Appendix Si39 303 136 General Information RXYQ14MY1B RXYQ16MY1B 4D040339A...
Page 144: ...Appendix Si39 303 138 General Information 7 11 Wiring Diagrams 7 11 1 Outdoor Unit RXYQ5MY1B...
Page 145: ...Si39 303 Appendix General Information 139 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 3D038582...
Page 146: ...Appendix Si39 303 140 General Information RXYQ14MY1B RXYQ16MY1B 3D038058...
Page 147: ...Si39 303 Appendix General Information 141 7 11 2 Field Wiring RXYQ5 16MY1B 3D040746...
Page 148: ...Appendix Si39 303 142 General Information RXYQ18 32MY1B 3D040747...
Page 149: ...Si39 303 Appendix General Information 143 RXYQ34 48MY1B 3D040748...
Page 158: ...Appendix Si39 303 152 General Information...
Page 180: ...Refrigerant Piping Si39 303 174 Installation Manual...
Page 226: ...Troubleshooting Si39 303 220 Operation Manual...