Product Manual

4
Scroll Air Compressors Tankmount/Basemount
Installation (Continued)
PIPING
General Guidelines
Refer to the general product 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 compressor 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 outlet
connection.
5. Use fl exible hose to connect the outlet of the compressor
to the piping so that the vibration of the compressor
does not transfer to the piping.
Remote Intake Piping
Powerex Compressor Systems with pipe thread connectors on
the intake fi lters are intended for installation with remote air
intake. Piping for the remote intake system must be installed
at the fi nal operating site.
Under some conditions, the intake piping may facilitate the
condensation of humidity in the intake air stream into liquid
water.
The intake fi lters supplied by Powerex will
not stop ingestion of liquid water by the
pumps. Liquid water going into the pumps will damage the
pumps and void the warranty.
Always install drip legs with suffi cient capacity to capture
liquid water in the intake piping before the air fi lters. Drip
legs must be sized with low enough air velocity to make sure
they are effective at capturing liquid water in the intake air
and must be maintained (drained) at frequent intervals to
make sure they remain effective.
SAFETY VALVES
Tank mounted compressors are shipped from the factory with
safety valves installed in the tank. The fl ow 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.
Operation
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. Confi rm that the electric power source and ground have
been fi rmly 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 fi lter is properly installed.
8. Confi rm that the drain valve is closed.
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 completely.
4. Check that the compressor operates without excessive
vibration, unusual noises or leaks.
5. Close the discharge valve completely.
6. If the pressure does not rise on a three phase unit, turn
the unit off. Have a qualifi ed electrician switch the
breaker OFF and exchange the L1 and L2 connections (two
out of three phases of electric source) inside the magnetic
starter enclosure.
7. Check the discharge pressure. Also make sure the air
pressure rises to the designated pressure setting by
checking the discharge pressure gauge.
8. Check the operation of the pressure switch by opening the
tank outlet valve and confi rming the compressor starts as
pressure drops.