Method For Adding Refrigerant - Daikin VRV RXYQ72AATJ Series Installation Manual

14.3. Method for adding refrigerant

14.3.1. Flow chart
Refrigerant overcharge happened
• Recover refrigerant to reach
R=Q
• Go to step 4a.
B
Step 4b+5
Manual refrigerant charging method (in
cooling operation)
Step 6B
Activate field setting [2-20]=1
Unit will start manual refrigerant charg-
ing operation.
Step 6B
• Open valve B.
• Charge remaining amount of refrig-
erant P (lbs.(kg))
R=Q+P
Step 6B
• Close valve B.
• Push BS3 to stop manual charging.
• Charging is finished.
• Fill in the amount on the additional
refrigerant charge label.
• Go to test run (see 15.4. Test opera-
tion on page 43).
31
Step 1
• Calculate additional refrigerant
charge amount: R(lbs.(kg)) (see
14.2. Calculating the additional
refrigerant charge on page 30)
Step 2+3
• Close valves B and C.
• Open valve A to field piping via liquid
R<Q
stop valve.
• Execute pre-charging amount:
Q (lbs.(kg)).
• Close valve A if no additional refrig-
erant can be charged.
R>Q
You want to execute automatic
refrigerant charge?
NO
A
B
C
Step 4a
• Close valve A.
• Charging is finished.
R=Q
• Fill in the amount on the additional
refrigerant charge label.
• Go to test run (see 15.4. Test opera-
tion on page 43).
A
YES
Step 4b+5
Automatic refrigerant charging method
Step 6A
• Push 1x BS2: 888
• Push BS2 for more than 5 seconds
01 pressure equalization.
Continued on next page >>
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