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14 Piping installation
Installation and operation manual
27
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546221-1B – 2020.10
14.4.4
To charge refrigerant: Flow chart
28].
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
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 additional refrigerant can be charged
Step 4a
• Close valve B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Go to test run
Step 4b
• Close valve B
R=Q
R>Q
R<Q
Step 5
• Connect valve A to refrigerant charge port
• Open all outdoor unit stop valves
Proceed with automatic or manual charge
Step 6b
Activate field setting [2-20]=1
Unit will start manual refrigerant charging operation.
Step 6a
• Push 1x BS2: "
888
"
• Push BS2 for more then 5 seconds "
t01
" pressure equalisation
• Open valve A
• Charge remaining amount of refrigerant P (kg)
R=Q+P
Depending on ambient conditions, the unit will decide to perform
autocharge operation in heating or cooling mode.
• 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
Automatic charge
Continued on next page >>
Manual charge
B
A
B
C
A
Содержание VRV IV Q+ Series
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Страница 48: ...4P546221 1B 2020 10 Copyright 2018 Daikin 4P546221 1 B 0000000Y Verantwortung f r Energie und Umwelt...