RIX Industries RIX 2V3B-4.1V Series Operating Instructions And Parts List Manual Download

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MAN-2V3B-4.1V REV (F)

With the selector switch in the HAND position the compressor is in manual mode and will start when
the START pushbutton is pressed. The unit will continue to run until one of the safety switches stops
the unit. At that point the compressor will not restart until the START pushbutton is pressed again. If
any switch remains above the "cut in" setting the compressor will not start. To manually stop the unit,
switch the HOA switch to the OFF position.

Automatic Mode of Operation

With the selector switch in the AUTO position the compressor will automatically start and stop based on
the signal from either the suction or discharge pressure switch. When shutdown by either switch, the
compressor will remain on standby until the pressure reverts back to the "cut in" point of the switch at
which point the compressor will restart. If shutdown by high gas temperature, the unit will remain off
until the unit cools down below the temperature switch set point and the fault is cleared by pressing and
releasing the emergency stop button. To manually stop the unit, switch the HOA switch to the OFF
position.

Electrical Schematic Description

The following explains the logic sequence as reflected on the schematic:

With power applied to the unit and the selector switch (HOA) in HAND, push the
START pushbutton.

The two pressure switches, low inlet (PSI) and discharge (PSD) are connected in
series to the motor controller. If the inlet pressure is high enough to close the
inlet switch, and the discharge switch remains closed (pressure below the switch
"cut in" setting) the compressor will start.

Current passes through the two closed pressure switches, the closed relay (R1-2)
and energizes the starter coil (C). The starter coil starts the main drive motor.
The fan motor and hourmeter also operate at this point. The green light (LG) will
energize indicating the compressor is running. Tripping of either the inlet or
discharge switch will break current to the coil (C) which will stop the drive motor.

If the 3

stage temperature reaches the switch set point the temperature switch

opens and de-energizes relay R1. When relay R1 is de-energized, contact R1-2
opens and removes power to the motor starter coil (C). This stops the compressor
motor, fan motor, and the hour meter. The green light will de-energize. Contact
R1-1 closes and the red light (LR) energizes signaling a high temperature
condition. After the temperature switch has reset, the emergency stop button must
be pushed to clear the fault, followed by the start button to restart the compressor
in manual mode. In auto mode the compressor will restart after the emergency
stop is pressed and released.

The compressor may also be run in the automatic mode by selecting AUTO on the
HOA switch. All features are the same as described above except that after the
inlet or discharge switch shut down the unit, the compressor will automatically
restart when the switches are moved to the "cut in" setting. The compressor will
continue cycling until the selector switch is moved to either HAND or OFF.

The unit may be stopped at any time by switching the HOA to OFF.