27
3P362438-1B English
14 .3 . Method for adding refrigerant
14 .3 .1 . Flow chart
Step 1
•
Calculate additional refrigerant
charge amount: R(lbs.(kg)) (see
14.2. Calculating the additional
refrigerant charge on page 26)
Refrigerant overcharge happened
•
Recover refrigerant to reach
R=Q
•
Go to step 4a.
R<Q
Step 2+3
• Open valve C to field piping via liquid
stop valve.
• Execute pre-charging amount:
Q (lbs.(kg)).
•
Close valve C if no additional refrig-
erant can be charged.
R=Q
Step 4a
•
Close valve C.
• 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 38).
R<Q
You want to execute automatic
refrigerant charge?
B
A
Step 4b+5
Manual refrigerant charging method (in
cooling operation)
NO
YES
Step 4b+5
Automatic refrigerant charging method
Step 6B
Activate field setting [2-20]=1
Unit will start manual refrigerant charg-
ing operation.
Step 6A
• Push 1x BS2:
888
•
Push BS2 for more than 5 seconds
01
pressure equalization.
Step 6B
•
Open valve A.
•
Charge remaining amount of refrig-
erant P (lbs.(kg))
R=Q+P
Depending on ambient conditions, the
unit will decide to perform autocharge
operation in heating or cooling mode.
Step 6B
•
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 (see 15.4. Test opera-
tion on page 38).
Continued on next page >>
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