To Charge Refrigerant: Flow Chart - Daikin VRV IV Q+ Series Installer And User Reference Manual

18 | Piping installation

18.4.4 To charge refrigerant: Flow chart

For more information, see
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Step 2+3
• Open valve B to the field piping via liquid stop valve
• Execute pre-charging amount: Q (kg)
• Close valve B if no
R=Q
Step 4a
• Close valve B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Go to test run
B
Step 6b
Activate field setting [2-20]=1
Unit will start manual refrigerant charging operation.
• Open valve A
• Charge remaining amount of refrigerant P (kg)
R=Q+P
• 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
Installer and user reference guide
98
"To charge refrigerant" [
additional refrigerant can be
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
Manual charge
4
99].
charged
R<Q
Step 4b
• Close valve B
Step 5
• Connect valve A to refrigerant charge port
• Open all outdoor unit stop valves
Proceed with automatic or manual charge
A
Step 6a
• Push 1x BS2: "888"
• Push BS2 for more then 5 seconds "t01" pressure equalisation
Depending on ambient conditions, the unit will decide to perform
autocharge operation in heating or cooling mode.
A
B
C
R>Q
Automatic charge
Continued on next page >>
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
RXYQQ8~20U7Y1B