Samsung MXJ-YA1509 Series, Installation Manual

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Installation guide Installation guide
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5. Refrigerant pipe flushing 5. Refrigerant pipe flushing
[3 major effects] [3 major effects]
(1) Removal of oxidation bubbles formed inside copper pipes (1) Removal of oxidation bubbles formed inside copper pipes when “nitrogen replacement is when “nitrogen replacement is
insufficient” during brazing work insufficient” during brazing work
(2) Removal of extraneous material and moisture (2) Removal of extraneous material and moisture from pipes when covering has been i from pipes when covering has been insufficient nsufficient
(3) Check connection in pipes l (3) Check connection in pipes linking outdoor and indoor units (Both liquid and gas pipes) inking outdoor and indoor units (Both liquid and gas pipes)
[Example of procedure] [Example of procedure]
(1) Set pressure regulator on nitrogen cyli (1) Set pressure regulator on nitrogen cylinder. nder.
∗ ∗
The gas used must be nitrogen. The gas used must be nitrogen.
(There is a danger of condensation if fleon or carbon dioxide are used and oxygen carries the (There is a danger of condensation if fleon or carbon dioxide are used and oxygen carries the
risk of explosions.)
risk of explosions.)
(2) Connect the charge hose from the pressure (2) Connect the charge hose from the pressure regulator to the service port on the regulator to the service port on the liquid pipe side liquid pipe side
of the outdoor unit. of the outdoor unit.
(3) Fit blanking plugs to all (3) Fit blanking plugs to all indoor units (B) other than unit A. indoor units (B) other than unit A.
(4) Open the main valve on the (4) Open the main valve on the nitrogen cylinder and set the pre nitrogen cylinder and set the pressure regulator to 72 psi. ssure regulator to 72 psi.
Flushing is a method of Flushing is a method of cleaning extraneous matter out of pipes using cleaning extraneous matter out of pipes using pressurized gas. pressurized gas.