WITH DESICCANT DRYERS
Furnish and install, where shown on the drawings a duplex stack mounted prefabricated medical compressed air plant with desiccant air dryers model____________ as manufactured by:
Amico Source
Toll Free Tel: 1.877.462.6426
The unit furnished shall be
a standard catalog item of the supplier regularly engaged in the business of
providing packaged systems for hospitals and laboratories and shall meet and
exceed the requirements of NFPA 99.
The package shall include
two oil-less air compressors and associated equipment, one horizontal ASME tank
and one duplex control panel. The entire system including the dryers, filters
and monitors shall be mounted on the tank. The only field connections required
will be system intake, exhaust and power connection at the control panel. All
components shall be completely pre-piped and pre-wired to single-point service
connections. All interconnecting piping and wiring shall be completed and
operationally tested prior to shipment. Provide liquid tight conduit, fittings
and junction boxes for all control and power wiring.
The medical air compressors
shall be of the totally oil-less reciprocating air-cooled design. Connecting rod
and bearings shall be packed with lifetime lubrication and sealed.
Each compressor shall be
belt driven by a ____ HP, 3 phase, 60 cycle, ______ volt, 1750 RPM, ODP NEMA
construction motor. Slide bases for
convenient belt tension adjustment and totally enclosed OSHA approved belt
guards shall be provided.
Each air compressor shall
have a capacity of ________ SCFM at 100 PSIG.
The system shall include
individual compressor inline intake filters, discharge check valves of bronze
construction, safety relief valves, bronze intake and discharge flexible
connectors, solenoid unloaders, isolation valves, air cooled aftercoolers for
each compressor, high discharge temperature shut down switches on each cylinder,
pressure control switches, as well as copper tubing with shut-off cock for gauge
and switches. The system shall include a 120 gallon pressure storage tank of
ASME construction rated for 200 PSI MWP service.
The tank shall be equipped with a pressure gauge, safety relief valve, 3
way by-pass, gauge glass and automatic electronic tank drain with manual
override. The inside of the tank shall be coated for rust protection with a two
component coating which provides a hard, durable lining.
The system shall include a
UL listed control panel in a NEMA 12 enclosure with the following accessories
for each pump:
Externally operable circuit
breaker with door interlock, control circuit transformer with fused primary
and secondary coils, H-O-A switch, magnetic starter with 3 leg overload
protection, hour meter and motor running light. Provide the panel with a
multiple position selector switch for selection of normal operation (automatic
alternation) or manual selection of lead and lag pumps if one of the pumps is
taken out of service due to scheduled maintenance. Provide audible and visual
local alarm (complete with indicating lights and individual sets of auxiliary
contacts wired to the terminal strip for remote alarm indication) for the
following: compressor temperature malfunction and reserve compressor in use.
Provide manual reset for thermal malfunction shut-down. All control and alarm
functions shall remain energized while any compressor in the system remains
electrically on-line. The lag compressor shall be able to start automatically if
the lead compressor fails to operate.
A completely packaged NFPA
99 and NEC compliant assembly featuring dual desiccant air dryers, dual 05
micron pre-filters, dual 0.5 micron after-filters, line pressure regulating
valves, dew point monitor, CO monitor and other accessories required to meet and
exceed the current code requirements shall be mounted on the compressor system
base. All components shall be completely pre-piped and pre-wired to single-point
service connections.
There shall be two identical banks of air treatment equipment, piped in parallel and provided with valves to by-pass either filter set for element replacement, maintenance and repair work on one of the sets while still treating medical compressed air through the other set without any sacrifice in air quality. Each bank consists of three stages of treatment.
The first stage is a
prime efficiency coalescer with particle removal down to 0.5 micron. Maximum
downstream remaining oil content 0.5 PPM/WT.
Retention on DOP test >99.97%. This filter removes aerosols and solid
particles.
The second stage is a
desiccant heatless air dryer, equipped with purge control. Pressure dewpoint of
0oF is attained by directing the
flow of saturated compressed air over a bed of desiccant which is contained in
two separate but identical "twin" towers. The dry compressed air is
discharged from the "on line" tower into the third stage.
The third
stage is a prime efficiency particulate afterfilter with particle removal down
to 0.5 micron. The after filter element is provides high particle retention, low
pressure drop and long element life.
Downstream pressure
regulators will maintain constant discharge pressure of 55 PSIG (field adjustable).
Digital dew point and
CO monitors with alarm set points at +390F
and 10 PPM are provided with dry contacts for connection to remote alarm panels.
A "demand check" for maintenance is included per current NFPA 99 for
each instrument.
The compressed air system
shall be guaranteed in writing by the manufacturer for a period of 12 months
from the date of start-up or 18 months from the date of shipment (whichever
comes first) against defects in design, materials, or construction. In addition,
the compressors are guaranteed for 36 months from the date of shipment.
The service of a factory trained representative shall be made available at the jobsite to check installation, start-up and instruct operating personnel in the proper operation and maintenance.