Table of Contents
Advertisement
can
be obtained at various local plumbing or
hardware outlets at nominal cost.
2.
If an air-cooled aftercooler is to be used, provisions
to bypass the aftercooler must be made. Since cold
air contains very little moisture, successful opera-
tion can be achieved without the aftercooler.
3.
Provide at least some simple shelter such as a
plywood windbreak
to protect against drifting
snow.
4.
Use only Gardner-Denver@
AEON 'M 9000
SP
lubricant.
5.
Monitor unit carefully during start-up and operation
to be sure it is functioning normally.
6.
Specify NEMA 4 enclosure for electrical devices.
Extreme Cold Weather Operation (Down To -40"F)
In addition
to the above, the following should be
provided:
1.
2.
3.
It will be necessary to provide shutters or to block
off part of the cooler in some manner since the
cooler is greatly oversized for operation inthese low
temperatures.
Since shutters are not provided as
a factory option, blocking off a portion of the cooler
with plywood should be satisfactory.
In extreme environments, run the unit in "Constant
Speed" only.
Some means of ProvidinG heat during shutdown
should be provided. TherE are various-methods to
accomplish
this, but since openings
are not
provided for sump heaters, the use of radiant
heaters is recommended.
The heaters should be
sized to provide at least a + 10°F environment for
coolers, motor and sump. Figure 3-2 shows how
these might be located in a typical installation and
sizes required.
Remember unsheltered (outside) installations should be
avoided where possible.
Installation next to a heated
building where enough heat can be used to keep the
compressor room above freezing will save many com-
plications in the operation and installation of the unit.
Refer to Engineering Data Sheet 13-9-411, available from
an authorized Gardner Denver distributor, for the ad-
vantages of using the heat recovered from rotary com-
pressors.
This heat recovery could easily pay for an
adequate shelter for the unit.
AUXILIARY AIR RECEIVER - An auxiliary air receiver is
not required if the piping system is large and provides
sufficient storage capacity to prevent rapid cycling.
When used, an air receiver should be of adequate size,
provided with a relief valve of proper setting, a pressure
gauge and a means of draining condensate.
MOISTURE
SEPARATOR/TRAP
- Since
unit
is
equipped with a built-in aftercooler, a combination mois-
ture separator and trap is furnished with the unit.
CONTROL
PIPING - Control piping is not necessary
since the Electra-Screw@ unit is factory wired and piped
for the control system specified.
INLET LINE - Where an inlet line is used between the air
filter and the compressor, it must be thoroughly cleaned
on the inside to prevent dirt or scale from entering the
compressor. If welded construction
is used, the line
must be shot blasted and cleaned to remove welding
scale.
In either case, the inlet line must be coated
internally by galvanizing or painting with a moisture and
oil-proof sealing lacquer. Up to ten (1O) feet in length,
the inlet line should be the full size of the inlet opening
on the compressor.
If an extra-long line is necessary,
the pipe size should be increased according to Inlet Line
Chart below.
Accessibility for inlet air filter servicing must be con-
sidered when relocating the filters from the unit to a
remote location.
DISCHARGE
SERVICE
LINE - The discharge service
line connection is made at the upper right hand corner
of the cooler, viewed from the oil cooler side. A hand
operated valve, (air service valve) must be installed be-
tween the unit and the customer's air system. When
manifolding two or more Electra-Screw"
units
on
the
same line, each unit is isolated by the check valve in the
unit discharge
line. If an Electra-Screw@
unit
is
manifolded to another compressor, be sure the other
compressor has a check valve in the line between the
machine and the manifold. If an Electra-Screw" and a
reciprocating compressor are manifolded together, an
air receiver Rust be located between the two units.
DANGER
Discharge
air used for breathing
will
cause severe injury or death.
Consult filtration specialists
for addi-
tional filtration
and treatment
equip-
ment
to meet
health
and
safety
standards.
INLET LINE LENGTHS
Length of Inlet Line
Diameter of Pipe Size
Oto 10 Feet .......................................................................................................... Same as Compressor Inlet Opening
10to 17 Feet .......................................................................................................... One Size Larger Than Inlet Opening
17t038
Feet ........................................................................................................ Two Sizes Larger Than Inlet Opening
13-8-610
Section 2
Page 3
Hide quick links:
Advertisement
Table of Contents
