Daikin VRV IV RXYQ TTJU Series, Engineering Data

Page: 36 / 91

EDUS341411-N Installation Manual
Installation of Outdoor Units 37
3P362438-1B
27 3P362438-1B English
14.3. Method for adding refrigerant
14.3.1. Flow chart
Step 1
r Calculate additional refrigerant
charge amount: R(lbs.(kg)) (see
14.2. Calculating the additional
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Refrigerant overcharge happened
r Recover refrigerant to reach
R=Q
r Go to step 4a.
R<Q
Step 2+3
r 1RGPXCNXG%VQƂGNFRKRKPIXKCNKSWKF
stop valve.
r 'ZGEWVGRTGEJCTIKPICOQWPV
Q (lbs.(kg)).
r Close valve C if no additional refrig-
erant can be charged.
R=Q
Step 4a
r Close valve C.
r %JCTIKPIKUƂPKUJGF
r
Fill in the amount on the additional
refrigerant charge label.
r Go to test run (see 15.4. Test opera-
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R<Q
;QWYCPVVQGZGEWVGCWVQOCVKE
refrigerant charge?
B A
Step 4b+5
Manual refrigerant charging method (in
cooling operation)
NO ;'5
Step 4b+5
Automatic refrigerant charging method
Step 6B
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Unit will start manual refrigerant charg-
ing operation.
Step 6A
r 2WUJZ$5 888
r Push BS2 for more than 5 seconds
01 pressure equalization.
Step 6B
r Open valve A.
r 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
r Close valve A.
r Push BS3 to stop manual charging.
r %JCTIKPIKUƂPKUJGF
r
Fill in the amount on the additional
refrigerant charge label.
r Go to test run (see 15.4. Test opera-
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