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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isolation valves and each dryer has a pre-filter to remove water and
particulates, and an after filter. Differential pressure indicators show
when the elements need to be replaced.
Lab system dryers are installed with automatic switching valves and
check valves that allow the offline dryer to be utilized when system
flow requires the extra drying capacity. The control panel selector
switch designates the lead/lag status of the dryers.
Dew Point Monitor
The Powerex Dew Point Monitor provides indication of dew point
temperature. Its microprocessor is controlled with alarm and self-
calibration sensor.
Regenerative dryers paired with the Powerex dew point monitor
may be operated in Econ Mode where the dew point monitor will
signal the dryer to cease purge if system dew point is below the set
point. The dryer control forces purge cycles at predefined intervals to
assure proper operation.
Frames or Tank Mount Structure
Powerex designed the system to bear the weight and stress of the
compressor pumps, controls, and receiver tank and dryers. When
lifting the system, use the designated fork lift slots or rig straps to
lift the main system skid. Do not attempt to lift the system using
individual component lifting hooks and eyes. Piping may need to be
supported during lift up or transport to avoid damaging the supplied
flex connectors for intake and exhaust.
Systems will require interconnection of modules on site. Make sure
individual modules are located per the design drawing and pneumatic
and electrical connections are made as shown in the supplied wiring
diagram. Some systems will have separately mounted inlet manifolds.
Condensate Traps & Automatic Drains
Powerex 7.5-10 HP scroll systems are equipped with cyclonic
condensate traps after the aftercoolers. Each trap has a “quiet zone”
near the bottom of the bowl and the accumulated condensate is
piped to a common timer drain through a service isolation valve.
The timer drain assembly is duplexed so the system remains fully
functional if our timer drain valve is isolated for service. Under
normal conditions the valves to one or both may be opened. Adjust
the timer settings to increase duration and frequency of opening if
large amounts of condensate accumulates in the receiver tank.
A similar timer drain is installed to drain the tank. Adjust the timer
to increase duration and frequency if condensate accumulates in the
tank.
Operation at High Altitudes
Compressor pumps are sensitive to reduced atmospheric pressure
encountered as altitude increases. Powerex will adjust the operating
set points to compensate for altitude if the original order is designated
for high altitude and the expected conditions provided to us.
Installation
Disconnect, tag and lockout power before
attempting to install, service, relocate or perform
any maintenance.
Do not lift or move unit without appropriately rated
equipment. Be sure the unit is securely attached to
lifting device used. Do not lift unit by holding onto tubes or coolers. Do not
use pumps to lift other attached equipment.
Installation of inlet / outlet air plumbing from
the system and electrical connections must be
in accordance with National Fire Protection Association (NFPA99) Code
Compliance for Medical Gas Breathing Air (Level 1).
Installation Site
1. The compressor system must be located in a clean, well lit and
well-ventilated area.
2. The area should be free of excessive dust, toxic or flammable
gases and moisture.
3. Never install the system where the surrounding temperature is
higher than 104°F or where humidity is high.
4. Clearance must allow for safe, effective inspection and
maintenance.
5. If necessary, use metal shims or leveling pads to level the
system. Never use wood to shim the unit.
NOTE:
Minimum of 36 in. of clearance is recommended on all sides.
36 in. is required in front of the electrical panel. 24 in. is required
on the remaining sides.
Ventilation
1. If the oil-less compressor system is located in a totally enclosed
room, an exhaust fan with access to outside air make up air
must be installed. Room temperature must remain below
104°F. Circulation must be sufficient to prevent local hot spots.
2. Never restrict the cooling fan exhaust air. Maintain a minimum
of 24 in. of clearance around the entire unit (36 in. is preferred).
3. Never locate the compressor where hot exhaust air from other
heat generating units may be pulled into the system.
Vibration
The Powerex Scroll systems are designed to minimize generated
vibrations by using balanced rotary scroll pumps. Each pump is
mounted on base plate with a motor and the base mount assembly is
isolated from the main support frame by use of cork-rubber pads at
the support points.
Powerex scroll systems are provided with cork-rubber vibration
isolation pads for use between the base platforms and the facility
floor to give further isolation. Normal practice is to install a pad
at each corner. Drill a hole through the pad to accommodate the
fastener selected to attach the base platform to the floor, positioning
the hole to maximize the contact between the platform lower surface
and the pad. When tightening the fastener, apply sufficient torque to
