Replacement of Main Units
TD831077
VII-18
7
2. Indoor Units
2-2. Refrigerant Recovery Operation
(When a ball valve is installed)
Cooling operation
1877_M_I
M M
Outdoor unit
Gas pipe
(wide pipe)
Liquid pipe
(narrow pipe)
Ball valve (option)
Service port
(ø6.35 flare with push-pin)
Valve (field supply )
Indoor unit
1 Fully close the ball valve at the liquid pipe side.
2 As shown in the figure, pass the ball valves on the liquid pipe and gas pipe sides through the respective service port
(ø 6.35 flare with push-pin) so that the passages are joined. (Perform an air purge using a charge hose or other
equipment.)
3 Operate for 10 to 20 minutes in this state.
4 Fully close the ball valve on the gas pipe side.
5 Release the small amount of residual refrigerant in the indoor unit to a safe location.
Refrigerant Recovery Operation
(When a ball valve is not installed)
* Refer to P VII-13, Cleaning of Dry Cores in the System, when replacing the compressors.
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