Medical Air & Laboratory Air Systems – 7.5 & 10 HP Pumps
Powerex
•
150 Production Drive
•
Harrison, OH 45030
•
USA
P 1.888.769.7979
•
F 513.367.3125
•
www.powerexinc.com
IN594402AV
•
06/2017
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pinched or kinked.
4. Follow steps 1 to 3 for flex line from dryer package to inlet of
receiver tank (if applicable).
NOTE:
All piping is provided and sealed for this portion of
installation.
5. If applicable, locate and attach intake inline air filter to outside
source air or header. A flex line is provided for attaching intake
of compressors to air filter assemblies.
6. Connect outlet of tank/dryer module to outlet source piping.
Attach all inlet and outlet source piping in
accordance with NFPA 99 for Medical Gas.
Electrical Wiring of System Shipped In
Provide electrical power in accordance to NEC
and local codes. Connection of wiring should be
performed by a qualified electrician.
1. Systems are provided with overload protection. A main system
service disconnect must be installed. Powerex recommends
the main system disconnect should be placed as close as
possible to the system.
2. Refer to the system wiring diagram. Temperature switches
shutdown the compressor when temperature reaches above a
pre-set limit. Connect dryer power cords, electric drain power
cord, dew point power cord, and alarm wiring to the master
control panel.
3. The system has a terminal strip in the control panel with
“landing points” for the master alarm panel connections.
Locate the supplied landing points and install wire connections
as appropriate.
4. Wiring connections can become loose during shipping and
storage. Check all connections for integrity when installing and
starting unit.
For questions concerning assembling and start-up, contact Powerex
at 1-888-769-7979 for technical assistance.
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. Confirm that the electric power source and ground have been
firmly connected. Confirm supply voltage and amps match the
system requirements.
4. Be sure all pressure connections are tight.
5. Check to be certain all safety relief valves, etc. are unrestricted.
6. Check that all fuses, circuit breakers, etc. are the proper size.
7. Make sure the inlet filter assembly is properly installed and all
intake isolation valves are open.
8. Confirm that the tank manual drain valve is closed.
rotation.
If all pumps are running in the wrong direction,
change the incoming power leads to correct
Start Up and Operation
1. Follow all procedures under “Before Start-Up” before
attempting operation of the lab air system.
2. Make sure all HOA switches are in the OFF position.
3. Switch on electric source and silence all alarms.
4. Make absolutely certain that the intake isolation valves to
all pumps are in the open position.
OPERATION OF PUMPS
WITH THE INLET VALVES CLOSED WILL DAMAGE THE PUMPS.
Open tank connection valve or valves completely. For medical
systems open the valves to and from Dryer A. Valves for Dryer
B should be closed.
5. Using the selector switches on the control panel, jog each
pump/motor in hand position and verify proper direction of
rotation then turn on each pump—motor in the “Auto” mode
until all are running. If any pump has incorrect rotation, turn
off and lock out power and correct phase conductor wiring
to achieve proper rotation before proceeding. If all pumps
are incorrect, the incoming power phases can be switched to
correct rotation.
6. Check for excessive vibration, unusual noises or leaks during
operation. If problems are detected, shut down the system
and make corrections or repair as needed before operating the
system.
7. Pumps may be operated in “hand” mode to override the
function of the automatic controls. The pumps and the system
will not be damaged during “hand” mode operation is used
for a short time. If hand mode if used for many hours, possible
overload and overheating may result along with more rapid
pump wear. The system safety valves may open if operated in
“hand” mode.
8. In normal operation, leave all selector switches in the “Auto”
position and allow the controls to cycle the pumps as needed
based on compressor demand.
