Scroll Medical & Laboratory Compressed Air Systems
Powerex
•
150 Production Drive
•
Harrison, OH 45030
•
USA
P 1.888.769.7979
•
F 513.367.3125
•
www.powerexinc.com
IN907800AV
•
08/2018
Page 6 of 40
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.
Electrical Wiring of System Shipped In Separate Modules
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.
9.
Once power is connected to the unit, visually check the
rotation of the compressor pump. If the rotation is incorrect,
have a qualified electrician correct the motor wiring.
Safety Valves, Pressure Vessels, and Piping
1.
Powerex systems are shipped with ASME safety valves sized so
that the maximum system flow is less than the capacity of the
valve or valves at the rated pressure. The rated pressure of the
valve is equal to or less than the maximum allowable working
pressure of the vessel or upstream pressure bearing parts. DO
NOT MODIFY or install any valves with different specifications
unless appropriate evaluations are completed. Do not modify
the structure of the pressure vessel or weld on the vessel.
2.
Do not install any shut off valves between the safety valve
and the vessel or between the compressor pump and the
first system safety valve. Doing so can result in a dangerous
condition and lead to death or injury.
3.
Do not install shut off valves in the system that create trapped
compressed air.
4.
Manually operate the safety valve every six months or 2,500
operating hours to provide assurance that the mechanism is
free to operate. Replace valve if it is leaking when it is closed
or if it fails to vent when actuated.
5. Any piping or pressure bearing connection hose or tubing used
in the system must be rated equal to or higher than the safety
valve pressure rating. Inadequate pressure rating could result
in bursting.
Modular Placement
1.
Unpack each frame module and discard or recycle all wood
shipping materials.
2.
Systems consist of multiple frame modules. The steel base
platforms are intended to be bolted to the floor as shown in
the design drawings and connecting hoses provided (found in
the parts pack box). Systems may be placed on isolation pads
if desired. Modules may be spaced farther apart without any
structural problems, but electrical connections may need to be
modified—additional isolation pads and longer hoses may be
needed.
3.
Place frame modules at location designated on build drawing.
Provide sufficient clearance around system for servicing (see
minimum clearance section).
4.
Install frame assembly fasteners to each frame joining the
frames together.
5. Lift corners of each frame assembly and install isolation pads
provided.
Connecting Piping (if applicable)
1.
Locate connection for piping at rear of compressor module to
receiver tank module.
2.
Remove plastic caps or adhesive covering on ports and
connectors.
3.
Connect flex line to the ports making sure each flex line is not
pinched or kinked.