Gardner Denver VST110 Operating And Service Manual page 17

Water-Cooled Units – Separate shell-and-tube coolers for air and oil services are supplied on water-
cooled packages. The heat exchangers require sufficient cooling water flow to operate efficiently – please
refer to Section 6, page 50 of this manual for detailed instructions on the operation and maintenance of
water-cooled heat exchangers, including minimum cooling water flow requirements.
Air for motor cooling, electronics cooling, and for the compressor intake is drawn in at the controller end
and exhausted through three (3) roof vents – refer to Section 6, page 50 of this manual for enclosure
ventilation requirements. Refer to Package Illustrations on Figure 1-4 and Figure 1-5, pages 12 and 13,
for hardware details.
Do not block flow of air entering or exiting the enclosure - allow 3-1/2 feet (1.1 m) clearance to the nearest
obstruction all around and on top.
FOUNDATION - The Gardner Denver Rotary Screw compressor requires no special foundation, but
should be mounted on a smooth, solid surface and as near level as possible. Temporary installation may
be made at a maximum 10° angle lengthwise or 10° 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 moving vehicles may require the use of mounting bolts
and shims to provide uniform support for the base.
OIL RESERVOIR DRAIN - The oil drain is piped from the bottom of the reservoir to the side of the base.
This drain is approximately 4.50 inches (115 mm) above the floor level. If this is not sufficient to
conveniently drain the oil, other methods are:
1. Elevate the compressor unit on a suitable structure 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 main motor from running hot.
2. Construct an oil sump or trough below the floor level and pump or bail the drained oil.
3. Pump oil from the reservoir filler opening or drain to a container.
ENCLOSURE - The compressors, electric motors and oil/air cooler assembly are mounted inside the
enclosure. Service doors are provided for maintenance access. Be sure to allow enough space around
the unit for the doors to open completely.
To remove the enclosure doors, open the door and lift it up slightly to disengage the hinges.
Ducting may be required on air-cooled enclosed machines.
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