To Charge Refrigerant - Daikin VRV IV Installer And User Reference Manual

18 | Piping installation
Charging refrigerant
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Step 4
• Connect valve A to the refrigerant charge port (d)
• Open all outdoor unit stop valves
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

18.4.5 To charge refrigerant

Installer and user reference guide
98
R>Q
Follow the steps as described below.
Pre-charging refrigerant
1 Calculate the additional amount of refrigerant to be added using the formula
mentioned in
2 The first 10 kg of additional refrigerant can be pre-charged without outdoor
unit operation.
The additional refrigerant amount is
smaller than 10 kg
The additional refrigerant charge is
larger than 10 kg
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.
p <
A
R410A
"To determine the additional refrigerant
If
p >
d
amount" [
Then
Perform steps 2+3.
Perform steps 2~8.
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VRV IV system air conditioner
4
95].
4P543427-1A – 2020.10