Daikin JEHBCU-0150-M-1, Техническое руководство

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T-CU01-NOV17-1 26
9.11 Safety pressure switch settings
The pressure switch fitted to JEH model condensing units with auto reset for Low Pressure and
manual reset for High Pressure is
NOT factory preset. BOTH THE LP AND HP SWITCH
SETTINGS MUST BE ADJUSTED TO SUIT THE APPLICATION BEFORE
STARTING THE UNIT.
Be sure that the high pressure setting does not exceed the receiver’s
maximum service pressure.
9.11.1 Setting adjustment
High pressure side
Turning the adjusting screw (5) clockwise will increase the cut-out pressure setting. Turning the adjusting screw
anti-clockwise will decrease the cut-out pressure setting. The differential setting is fixed so the cut-in will vary
with the cut-out setting.
Low pressure side
Range: Turning the range adjusting screw (1) clockwise will decrease the cut-in pressure setting. Turning the
range adjusting screw anti-clockwise will increase the cut-in pressure setting.
Differential: Turning the differential adjusting screw (2) clockwise will increase the differential pressure setting.
Turning the differential adjusting screw anti-clockwise will decrease the differential pressure setting.
9.11.2 High pressure safety (Manual reset)
The high pressure safety switch is required to stop the compressor should the discharge pressure exceed the values
shown in the following table. The high pressure switch can be set to lower values depending on the type of
refrigerant, application and ambient conditions.
Refrigerant R404A R134a
Cut Out (bar g) 27.7 18
Cut Out (psi g) 402 261