Sinclair SWH-200DE Service And Installation Manual page 33

SINCLAIR
(1) Requirements
The radius of the bending pipe must exceed 3.5D. The ratio of the short diameter after bending to
the original diameter must exceed 2/3.
(2) Processing methods:
1) Manual bending: applies to thin copper pipes (Φ6.35 mm to Φ12.7 mm)
2) Mechanical bending: applicable range (Φ6.35 mm to Φ44.45mm)
5.1.1.4 Pipe Expanding
Pipe expanding is used to provide a welding point for pipe connection. Requirements on pipe
expanding are as follows:
(1) Before pipe expanding, apply appropriate amount of lubricant on the surface of the pipe. (The
lubricant must meet the refrigerant system's requirements.)
(2) Pipe expanding length must be in accordance with the insertion depth of the caliber.
(3) To avoid leakage due to straight lines at the expanding point, turn round the copper pipe and
then make corrections.
(4) Apply appropriate force during pipe expanding to avoid crack.
5.1.1.5 Flaring
Another mode of pipe connection is flare opening connection, which requires pipe flaring before
connection.
(1) Install the flaring nut to the copper pipe.
(2) Put the copper pipe into the root of the pipe expander.
1) Before pipe flaring, apply appropriate amount of lubricant on the surface of the opening to
ensure smooth pass of flaring nuts and avoid pipe distortion.
2) The concentricity must be ensured after pipe flaring. The sealing face must be intact
without any burr, crack, or wrinkle.
3) Small burrs at the pipe opening can be cleared using a grater.
5.1.2 Installation of Refrigerant Pipes
5.1.2.1 Installation Sequence
The sequence for installing the refrigerant pipe is as follows:
Preparing and installing the support, hanger, and bracket – Piping according to the drawing –
Cleaning the pipe – Processing the pipe – Adding an thermal insulation sleeve – Connecting the pipe –
Fixing the pipe – Blowing contaminants in the pipe system – Performing an air-tightness test –
Performing thermal insulation
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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