17
|
Piping installation
Installer and user reference guide
86
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
Charging refrigerant
Step 5
Proceed with manual charge
Step 6
Activate field setting [2-20]=1
Unit will start manual refrigerant charging operation.
Step 7
• Open valve A
• Charge remaining amount of refrigerant P (kg)
R=Q+P
Step 8
• Close valve A
• Push BS3 to stop manual charging
• Charging is finished
• Fill in the amount on the additional refrigerant charge label
• Go to test run
Step 4
• Connect valve A to the refrigerant charge port (d)
• Open all outdoor unit stop valves
R>Q
<< Continuation of previous page
p< p>
R410A
d
A
17.4.5 To charge refrigerant
Follow the steps as described below.
Pre-charging refrigerant
1
Calculate the additional amount of refrigerant to be added using the formula
mentioned in
"17.4.3 To determine the additional refrigerant amount"
83].
2
The first 10 kg of additional refrigerant can be pre-charged without outdoor
unit operation.
If
Then
The additional refrigerant amount is
smaller than 10 kg
Perform steps 2+3.
The additional refrigerant charge is
larger than 10 kg
Perform steps 2~8.
3
Pre-charging can be done without compressor operation, by connecting the
refrigerant bottle to the service ports of the liquid and equalising stop valves
(open valve B). Make sure that valve A and all outdoor unit stop valves are
closed.
