To Check For Refrigerant Leaks After Charging; To Insulate The Refrigerant Piping - Daikin VRV 5 S Series Installer And User Manual

19.8 To check for refrigerant leaks after charging

19.9 To insulate the refrigerant piping

RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02
NOTICE
Applicable legislation on fluorinated greenhouse gases requires that the refrigerant
charge of the unit is indicated both in weight and CO
Formula to calculate the quantity in CO
refrigerant × total refrigerant charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge label.
2 Fix the label on the inside of the outdoor unit. There is a dedicated place for it
on the wiring diagram label.
All field made refrigerant joints must be tested for tightness.
No leak shall be detected with a test method that has a sensitivity of 5 grams
refrigerant per year or better, at a pressure of at least 0.25 times the maximum
working pressure (see "PS High" on the unit name plate).
In case a leak is detected
1 Recover the refrigerant and repair the joint(s).
2 Perform the leak tests see
3 Charge refrigerant.
4 Check for refrigerant leaks after charging (see above).
After finishing the charging procedure, the piping must be insulated. Take into
account the following points:
▪ Make sure to insulate the connection piping and refrigerant branch kits entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a temperature of 70°C
for liquid piping and polyethylene foam which can withstand a temperature of
120°C for gas piping.
▪ Reinforce the insulation on the refrigerant piping according to the installation
environment.
Ambient temperature
≤30°C
>30°C
Between outdoor and indoor unit
NOTICE
It is recommended that the refrigerant piping between indoor and outdoor unit is
installed in a ducting or the refrigerant piping is wrapped with finishing tape.
1 Insulate and fix the refrigerant piping and cables as follows:
19
2
equivalent tonnes: GWP value of the
2
"18.3.4 To perform a leak
Humidity
75% to 80% RH
≥80% RH
Charging refrigerant
|
equivalent.
4
test" [ 94].
Minimum thickness
15 mm
20 mm
Installer and user reference guide
103