SiEN34-705
Heat Pump 60Hz (RXYQ5~54P)
Installation Manual
301
<About refrigerant charging>
!
The refrigerant charge port is connected to the piping inside the unit.
When the unit is shipped from the factory, the unit’s internal piping is already charged with
refrigerant, so be careful when connecting the charge hose.
!
After adding the refrigerant, make sure to close the lid of the refrigerant charging port.
The tightening torque for the lid is 11.5 to 13.9 Nm.
!
See [Shutoff valve operation procedure] in chapter 2-11-1 for details on how to handle
shutoff valves.
!
When done or when pausing the refrigerant charging operation, close the valve of the
refrigerant tank immediately. If the tank is left with the valve open, the amount of refrigerant
which is properly charged may be off the point. More refrigerant may be charged by any
remaining pressure after the machine is stopped.
<About check operation>
!
Make sure to perform the check operation after installation. Otherwise, the malfunction code
“U3” will be displayed and normal operation cannot be performed.
And the failure of “Check of miswiring” may also cause abnormal operation. Performance
may drop due to the failure of “Judgment of piping length”.
!
Check operation must be performed for each refrigerant piping system.
Checking is impossible if plural systems are being done at once.
!
The individual problems of indoor units can not be checked.
About these problems check by test run after the check operation is completed. (See
chapter 2-13)
!
The check operation cannot be performed in recovery or other service modes.
1. Make sure the following works are complete in accordance with the installation manual.
!
Piping work
!
Wiring work
!
Air tight test
!
Vacuum drying
!
Installation work for indoor unit
2. Calculate the “additional charging amount” using “How to calculate the additional refrigerant
to be charged” in “2-6-5 Example of connection”.
3. Open the valve C (See the figure 31. The valve A, B and the liquid and gas side shutout
valve must be left closed), and charge the refrigerant of the “additional charging amount”
from the liquid side shutout valve service port.
If the “additional charging amount” was charged fully, close the valve C and go to step 5.
If the “additional charging amount” was not charged fully, go to step 4.
figure 31
Charge hose
Refrigerant charge port
Valve B
Outdoor
unit
Outdoor
unit
To indoor unit
Field pipings
Refrigerant flow
Liquid side
shutoff valve
Shutoff valve
service port
Gas side
shutoff valve
Valve C
Valve A
R-410A tank
(with siphon)
Measuring
device
Содержание RXYQ5PY1
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