Charging Refrigerant; Before Charging Refrigerant; About Refrigerant Tank - Daikin RZQ200MY1 Installation Manual

[Tightening torque]
Tightening torque N·m (turn clockwise to close)
Size
(mm)
Shaft (stop valve body)
Inner hexagon
Ø9.5 5.4~6.6
wrench 4mm
Inner hexagon
Ø19.1 27.0~33.0
wrench 8mm
8.

CHARGING REFRIGERANT

WARNING
• Be sure to inform other installers or attach the front panel
well before you leaving with the power supply turned on for
the outdoor unit.
(Raise the front panel as high as possible during installation
to clamp it with the top panel.)

8-1 Before charging refrigerant

• Check the following works are completed in accordance with the
installation manual.
• Piping work
• Electrical work
• Air tight test and vacuum drying

8-2 About refrigerant tank

• Check whether the tank has a siphon pipe before charging and
place the tank properly so that the refrigerant is charged in the
liquid phase (see the figure in 8-3 Charging refrigerant).
8-3 Charging refrigerant
Electric shock warning
• Never touch other parts excluding the push buttons of the PC
board (A1P) during setting.
• There is a risk of electric shock if you touch wrong, since this
operation must be performed with the power on.
CAUTION
• Use protective equipment (groves and goggles) when charging
the refrigerant.
• To prevent the liquid hammer, the refrigerant must not be
charged over the allowable maximum amount.
• Do not perform the refrigerant charging operation when indoor
unit is under construction.
• Beware the fan running when opening the front panel.
The fan may continue rotating after the outdoor unit stops.
Note
• The refrigerant charge port is connected to the unit piping.
When shipped, the unit's piping is charged with refrigerant, take
care when attaching the charge hose.
• After refrigerant charging is completed, secure the refrigerant
charge port cap tightly, to a tightening torque of 11.5~13.9 N∙m.
• See stop valve operation procedure under "7. REFRIGERANT
PIPING CONNECTION" for details on Stop valve operation
procedure.
• When the refrigerant charging operation is completed or
paused, close the valve of the refrigerant tank immediately. If the
tank valve is left open, the amount of refrigerant which is
properly charged may be off the point. Because even if the air
conditioner stops, the refrigerant will be charged into the unit
under the residual pressure.
14
Cap (valve lid) Service port
13.5~16.5
11.5~13.9
22.5~27.5
Charge refrigerant using tank with siphon pipe Charge refrigerant using other tanks
Stand the tank upright
and charge.
(Due to the siphon pipe
within the tank, there is
no need to turn over the
tank to charge).
1. Calculate the refrigerant charge according to "How to calculate
the refrigerant to be charged" in "7. REFRIGERANT PIPING
CONNECTION".
2. After completing vacuum drying, discharge the air in the charge
hose, then open the valve and charge the refrigerant of the
calculated amount in the liquid phase from the liquid side stop
valve service port.
3. Close the valve after completing refrigerant charging.
Note) If it is impossible to charge the amount calculated
according to above procedure, charge the refrigerant
again using procedure on the right.
State of the stop valves and valve A
•
For operation instructions of the stop valves. refer to Stop valve operation
procedure in "7. REFRIGERANT PIPING CONNECTION".
R410A tank
(with siphon pipe)
Gauge
ON/OFF state of the valve A and stop valves
Before starting charging
During charging operation
If the refrigerant of the calculated amount is not charged fully
Perform refrigerant charging operation according to the following
procedure to charge refrigerant. For settings of refrigerant charging
operation, refer to the "Service Precautions" label attached under
the front panel of the electronic component box.
[Procedure]
1. Turn on the power supply of all indoor and outdoor units of the
system.
2. Open the gas side and liquid side stop valves and perform
refrigerant charging operation. (Open the valve A immediately
after compressor starts up.)
3. After charging a specified amount of refrigerant, press the
RETURN button (BS3) on outdoor unit's PC board (A2P) to
stop refrigerant charging operation.
4. Close the valve after completing charging operation.
State of the stop valves and valve A
•
For operation instructions of the stop valves. refer to Stop valve operation
procedure in "7. REFRIGERANT PIPING CONNECTION".
•
The service port (for refrigerant charging) is within the outdoor unit.
•
Since the unit is filled with refrigerant when shipped out of the factory, take
care while installing the charge hose.
• Be sure to close the service port cover (for refrigerant charging) after
completing refrigerant charging. Tightening torque of the service port cover is
11.5 ~ 13.9 N·m.
Gas side stop valve
Outdoor
unit
Liquid side stop valve
Stop valve
service port
Indoor unit
ON/OFF state of valve A and stop valves
Before starting charging
During charging operation
Stand the tank
upside-down and
charge.
Outdoor
Liquid side Gas side
unit
stop valve stop valve
Stop valve
Valve A
Indoor unit
service port
Liquid side Gas side
Valve A
stop valve stop valve
OFF OFF
ON OFF
Service port
(for refrigerant charging)
R410A tank
Valve A
(with siphon pipe)
Gauge
Liquid side Gas side
Valve A
stop valve stop valve
OFF ON
ON ON
OFF
OFF
ON
ON