Powerex MTSD0503 - Safety Valves, Pressure Vessels, and Piping; Electrical Wiring of System Shipped In Separate Modules; Operation; Before Start Up

Scroll Medical & Laboratory Compressed Air Systems
Powerex • 150 Producon 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 ex line from dryer package to inlet of
receiver tank (if applicable).
NOTE: All piping is provided and sealed for this poron of
installaon.
5. If applicable, locate and aach intake inline air lter to outside
source air or header. A ex line is provided for aaching intake
of compressors to air lter 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. Connecon of wiring should be
performed by a qualied electrician.
1. Systems are provided with overload protecon. 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 connecons.
Locate the supplied landing points and install wire connecons
as appropriate.
4. Wiring connecons can become loose during shipping and
storage. Check all connecons for integrity when installing and
starng unit.
For quesons concerning assembling and start-up, contact Powerex
at 1-888-769-7979 for technical assistance.
Operaon
Before Start Up
1. Make sure all safety warnings, labels and instrucons have
been read and understood before connuing.
2. Remove any shipping materials, brackets, etc.
3. Conrm that the electric power source and ground have been
rmly connected. Conrm supply voltage and amps match the
system requirements.
4. Be sure all pressure connecons are ght.
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 lter assembly is properly installed and all
intake isolaon valves are open.
8. Conrm that the tank manual drain valve is closed.
9. Once power is connected to the unit, visually check the
rotaon of the compressor pump. If the rotaon is incorrect,
have a qualied 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 ow 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 dierent specicaons
unless appropriate evaluaons are completed. Do not modify
the structure of the pressure vessel or weld on the vessel.
2. Do not install any shut o valves between the safety valve
and the vessel or between the compressor pump and the
rst system safety valve. Doing so can result in a dangerous
condion and lead to death or injury.
3. Do not install shut o valves in the system that create trapped
compressed air.
4. Manually operate the safety valve every six months or 2,500
operang 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 connecon hose or tubing used
in the system must be rated equal to or higher than the safety
valve pressure rang. Inadequate pressure rang could result
in bursng.
Modular Placement
1. Unpack each frame module and discard or recycle all wood
shipping materials.
2. Systems consist of mulple frame modules. The steel base
plaorms are intended to be bolted to the oor as shown in
the design drawings and connecng hoses provided (found in
the parts pack box). Systems may be placed on isolaon pads
if desired. Modules may be spaced farther apart without any
structural problems, but electrical connecons may need to be
modied—addional isolaon pads and longer hoses may be
needed.
3. Place frame modules at locaon designated on build drawing.
Provide sucient clearance around system for servicing (see
minimum clearance secon).
4. Install frame assembly fasteners to each frame joining the
frames together.
5. Li corners of each frame assembly and install isolaon pads
provided.
Connecng Piping (if applicable)
1. Locate connecon for piping at rear of compressor module to
receiver tank module.
2. Remove plasc caps or adhesive covering on ports and
connectors.
3. Connect ex line to the ports making sure each ex line is not
pinched or kinked.