To Charge Refrigerant: Flow Chart; To Charge Refrigerant - Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual

16 Charging refrigerant
16.4

To charge refrigerant: Flow chart

For more information, see "16.5 To charge
Step 1
Calculate additional refrigerant charge amount: R (kg)
Step 2+3
• Close valve A
• Open valve B to the liquid line
• Execute pre-charging amount: Q (kg)
Step 4a
Close valve B
Step 5
• Connect valve A to the refrigerant charge port (d)
• Open all outdoor unit stop valves
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
• Input the additional refrigerant amount via setting [2-14]
• Go to test run
16.5

To charge refrigerant

To speed up the refrigerant charging process, it is in case of larger
systems recommended to first pre-charge a portion of refrigerant
through the liquid line before proceeding with the manual charging. It
can be skipped, but charging will take longer then.
Pre-charging refrigerant
1 Calculate the additional amount of refrigerant to be added using
the formula mentioned in
amount" [ 4 37].
refrigerant
Note: The first 10 kg of additional refrigerant can be pre-charged
without outdoor unit operation.
Note: Pre-charging can be done without compressor operation
Installation and operation manual
38
refrigerant" [ 4 38].
Q<R
"16.3 To determine the additional
p < p >
A B
R32
Q=R
Step 4c
Refrigerant overcharge happened, recover
refrigerant to reach Q=R
Step 4b
• Close valve B
• Charging is finished
• Fill in the amount on the additional refrigerant charge
label
• Input the additional refrigerant amount via setting [2-14]
• Go to test run
Prerequisite: Make sure that all outdoor unit stop valves and
manifold valve A are closed. Disconnect the manifold from the gas
lines.
2 Connect the manifold valve B to the service port of the liquid
stop valve.
3 Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore.
d
Q>R
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12