Daikin VRV IV RXMLQ8T7Y1B Series - To Charge Refrigerant

5 Installation
Installation and operation manual
17
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1 – 2018.07
Charging refrigerant
Step 5
Proceed with manual charge
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
• Go to test run
Step 4
• Connect valve A to the refrigerant charge port (d)
• Open all outdoor unit stop valves
R>Q
<< Continuation of previous page
p
<
p
>
R410A
d
A
5.6.5 To charge refrigerant
Follow the steps as described below.
Pre-charging refrigerant
1 Calculate the additional amount of refrigerant to be added using
the formula mentioned in "5.6.3 To determine the additional
refrigerant amount"on page15.
2 The first 10 kg of additional refrigerant can be pre-charged
without outdoor unit operation.
If Then
The additional refrigerant amount
is smaller than 10kg
Perform steps 2+3.
The additional refrigerant charge
is larger than 10 kg
Perform steps 2~8.
3 Pre-charging can be done without compressor operation, by
connecting the refrigerant bottle to the service ports of the liquid
and equalising stop valves (open valve B). Make sure that valve
A and all outdoor unit stop valves are closed.
NOTICE
During pre-charging, the refrigerant is charged through the
liquid line. Close valve A and disconnect the manifold from
the gas line.
p
<
p
>
R410AN2
C
b c e
a
g
f
d
A B
a Pressure reducing valve
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
A Valve A
B Valve B
C Valve C
4 Do one of the following:
If Then
4a The calculated additional
refrigerant amount is reached
by above pre-charging
procedure
Close valves C and B and
disconnect the manifold
connection to the liquid line.
4b The total amount of
refrigerant could not be
charged by pre-charging
Close valves C and B,
disconnect the manifold
connection to the liquid line,
and perform steps 4~8.