Gardner Denver TWISTAIR EWDQ D Operating And Service Manual Download

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13–11–602 Page 10

cooling module; air is exhausted through the cooler,
then through the top of the unit. The air–cooled unit
with the standard enclosure requires sufficient flow,
FIGURE 2–2, page 9, for the compressor water/after-
cooling system and for electric motor cooling. Air is
drawn into the unit at the motor side of the enclosure
and is exhausted at the cooler side. Do not block the
air flow to and from the unit. Allow three and one–half
(3–1/2) feet (1.1 M) to the nearest obstruction on the
starter end and control box end of the unit. Allow three
(3) feet (.9 M) to the nearest obstruction above and on
other sides of unit.

For continuous efficiency, air cooled cooler cores must
be periodically cleaned with either vacuum or com-
pressed air.

For copper water coolers, do not use
any cleaning solution that is not com-
patible with copper. Use of improper
solution may result in damage to the
cooler.

If wet cleaning is required, shield the motor and spray
on a mild soap solution, then flush with clean water.

Water–Cooled Units – The water–cooled unit with the
standard enclosure requires sufficient air flow,
FIGURE 2–2, page 9, for electric motor cooling. Air is
drawn into the unit at the top of the enclosure on the
motor end and is exhausted at the top of the enclosure
above the coolers. Do not block air flow to and from the
unit. Allow three and one–half (3–1/2) feet (1.1 M) to the
nearest obstruction on the starter end and control box
side of the unit. Allow three (3) feet (.9 M) to the nearest
obstruction above and on other sides of the unit. For
additional information, see pages 13 through 15.

FOUNDATION – The Gardner Denver Rotary Screw
compressor requires no special foundation, but should
be mounted on a smooth, solid surface. Whenever pos-
sible install the unit near level. Temporary installation
may be made at a maximum 10

angle lengthwise or

sidewise.

Mounting bolts are not normally required. However,
installation conditions such as piping rigidity, angle of
tilt, or danger of shifting from outside vibration or mov-
ing vehicles may require the use of mounting bolts and
shims to provide uniform support for the base.

OIL BREATHER – To prevent oil leakage in shipment,
the breather vent normally located in the top of the res-
ervoir is replaced by a plug. Before operating the unit,
remove the 1–1/4 inch plugs and install the breathers.

Failure to remove the plug from the
top of the reservoir and install the
breather before operation will result
in machine damage.

Potential contamination of oil inlet supply due to minute
traces of vapors from the oil sump vent can be avoided
by piping the vents to the outside.

When remote mounting the oil breath-
er, be certain there are no low places
in the piping where oil could collect
and prevent proper venting of the oil
sump.

OIL RESERVOIR DRAIN – The oil drain is piped from
the bottom of the reservoir to the side of the frame. This
drain is approximately 4 inches (100 mm) above the
floor level. If this is not sufficient to conveniently drain
the oil, some other methods of providing drain are:

Elevate the compressor unit on raised blocks to
obtain the desired drain height.

If the compressor unit base is raised
above floor level, the space between
the floor and the base bottom must be
closed with solid material all around
to prevent recirculation of hot air from
the oil cooler end and over tempera-
ture operation.

Construct an oil sump or trough below the floor
level and pump or bail the drained oil.

Pump oil from the reservoir filler opening or drain
to a container.

ENCLOSURE – The compressor, electric motor, water
cooler and aftercooler are mounted inside the enclo-
sure. Service doors are provided for maintenance ac-
cess. Be sure to allow enough space around the unit