Powerex manual 9

Oilless Reciprocating Air Compressor Pumps

4.Clearance must allow for safe, effec- tive inspection and maintenance.

Minimum Clearances

Above	24”
Drive belt side	12”
Other sides	20”

5.If necessary, use metal shims or level- ing pads to level the compressor. Never use wood to shim the compressor.

VENTILATION

1.If the oilless compressor is located in a totally enclosed room, an exhaust fan with access to outside air must be installed.

2.Never restrict the cooling fan exhaust air.

3.Never locate the compressor where hot exhaust air from other heat generating units may be pulled into the unit.

WIRING

Refer to the general safety guidelines manual. All electrical hook-ups must be performed by a qualified electrician. Installations must be in accordance with local and national electrical codes.

Use solderless terminals to connect the electric power source.

PIPING

Refer to the general safety guidelines manual.

1.Make sure the piping is lined up without being strained or twisted when assembling the piping for the compressor.

2.Appropriate expansion loops or bends should be installed at the com- pressor to avoid stresses caused by changes in hot and cold conditions.

3.Piping supports should be anchored separately from the compressor to reduce noise and vibration.

4.Never use any piping smaller than the compressor connection.

5.Use flexible hose to connect the out- let of the compressor to the piping so that the vibration of the compressor does not transfer to the piping. Make

sure the flexible hose is rated for proper pressure and temperature before installing.

SAFETY VALVES

Tank mounted compressors are shipped from the factory with safety valves installed in the tank manifold. The flow capacity of the safety valve is equal to or greater than the capacity of the compressor.

1.The pressure setting of the safety valve must be no higher than the maximum working pressure of the tank.

2.Safety valves should be placed ahead of any possible blockage point in the system, i.e. shutoff valve.

3.Avoid connecting the safety valve with any tubing or piping.

4.Manually operate the safety valve every six months to avoid sticking or freezing.

HOURMETER

The hourmeter on the oilless compressor indicates the actual number of hours the unit has been in operation. The hourmeter is also used to determine maintenance and service timing.

An hourmeter must be installed with every oilless compressor.

CONDENSATE DRAIN VALVE

A condensate drain valve must be installed on any tank to allow removal of the liquid which will collect during compressor operation.

	Drain liquid from
NOTICE
	tank daily.

Operation

Powerex oilless single stage compressors operate at a maximum pressure of 125 PSIG. Two stage compressors operate at a maximum of 145 PSIG and are equipped for continuous run operation. Compressor RPM’s are established by Powerex based on horsepower and operating pressure.

BEFORE START UP

1.Make sure all safety warnings, labels and instructions have been read and understood before continuing.

2.Remove any shipping materials, brackets, etc.

3.Confirm that the electric power source and ground have been firmly connected.

4.Be sure all pressure connections are tight.

5.Check to be certain all safety relief valves, etc., are correctly installed.

6.Check that all fuses, circuit breakers, etc., are the proper size.

7.Make sure the inlet filter is properly installed.

8.Confirm that the drain valve is closed.

9.Visually check the rotation of the compressor pump. If the rotation is incorrect, have a qualified electrician correct the motor wiring.

START-UP AND OPERATION

1.Follow all the procedures under “Before start-up” before attempting operation of the compressor.

2.Switch the electric source breaker on.

3.Open the tank discharge valve com- pletely.

4.Check that the compressor operates without excessive vibration, unusual noises or leaks.

5.Close the discharge valve completely.

6.Check the discharge pressure. Also make sure the air pressure rises to the designated pressure setting by check- ing the discharge pressure gauge.

7.Check the operation of the pressure switch or the pilot valve for continu- ous run units by opening the stop valve and confirming the compressor starts or reloads as pressure drops.

Switch the breaker OFF if the compressor is not to be used for a long period of time.

	These units are
NOTICE
	equipped with

head unloaders for continuous run operation.

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