Daikin RXYTQ20U7YF [93/152] Piping installation

Daikin RXYTQ10U7YF [93/152] Piping installation
18 | Piping installation
Installer and user reference guide
93
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P561157-1A – 2020.10
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.
INFORMATION
If the total additional refrigerant amount was reached in step 3 (by pre-charging
only), record the amount of refrigerant that was added on the additional refrigerant
charge label provided with the unit and attach it on the back side of the front panel.
Perform the test procedure as described in "21Commissioning"[4125].
Charging refrigerant
5 After pre-charging, connect valve A to the refrigerant charge port and charge
the remaining additional refrigerant through this port. Open all outdoor unit
stop valves. At this point, valve A must remain closed!
p
<
p
>
R410A
a c
d
b
A
a Weighing scales
b Refrigerant R410A tank (siphon system)
c Vacuum pump
d Refrigerant charge port
A Valve A

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