Jenny Reciprocating Air Compressors, Operation And Maintenance Manual

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OPERATING INSTRUCTIONS
This section describes the operating controls and indicators, detail theory of operation, and
operating procedures.
OPERATING CONTROLS AND INDICATORS
Jenny compressors are designed to be highly reliable and very simple to operate. Therefore, there
are only a few operating control and indicators. They are as follows:
On/Off Switch
(SW-3, SW-4, Start/Stop Control & Dual Control)- A switch which allows
the operator to manually turn the machine on and off. The switch is located either on
the motor, as in the case of the SW-3 and SW-4, or a rotatable lever on the pressure
switch for Dual Control and Start/Stop control.
Receiver Pressure Gauge
- Indicates the receiver tank air pressure in PSI. The receiver
gauge is located either directly f tted to the receiver tank or on the manifold block.
Pressure Regulator - The pressure can be increased or decreased by turning the
knob on the regulator. Clockwise increases the outlet pressure and counterclockwise
decreases the outlet pressure.
Pressure Regulator Gauge - Indicates the outlet or line pressure in PSI. The pressure
regulator gauge is located on the pressure regulator
Oil Level Gauge
(If so equipped) - Allows for the visual inspection of the oil level in the crankcase of
the pump through a clear window or sight glass.
Pressure Switch (Start/Stop Control & Dual Control) - Starts and stops the unit
at predesignated high and low pressures. The compressor will start when the
pressure within the receiver tank falls below the preset low pressure setting
and will stop when the system has reached the high pressure setting. Also
located on the pressure switch is a rotatable lever that allows the operator of
the unit to turn the unit on or off.
Pilot Valve
(Constant Run and Dual Control) - Opens and closes the air intake
check valves at predesignated high and low pressures while the motor or engine
runs. The air intake check valves will be allowed to operate normally when the
pressure within the receiver tank falls below the preset low pressure setting and
will hold the intake check valves open when the system has reached the high
pressure setting.
Safety Valve - A safety valve is provided on all Jenny compressor units. The
purpose of the safety valve is to relieve system and tank pressure to the
atmosphere at a predetermined high pressure limit. In most cases, this is
an indication that there has been a failure in air system somewhere and the
cause should be investigated immediately.
Dual Control Switch (If so equipped) - Dual Control Units allow the compressor to operate in both
constant run and start-stop control. The unit has both a pilot valve and a pressure switch. The unit