Gardner Denver VS-11, Operating And Service Manual, Page: 17 / 68

13-18-606 Page 16
INSTALLATION FOR COLD WEATHER OPERATION - It is recommended that the unit be installed inside a
shelter that will be heated to temperatures above freezing (40
°
F, 5
°
C). This will eliminate many of the problems
associated with operating units in cold climates where freezing rain, drifting snow, freezing condensate and bitter
cold temperatures are encountered.
Unsheltered (outside) installations should be avoided whenever possible. Installation next to a heated building
where enough heat can be used to keep the compressor room above freezing will save many complications 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
advantages of using the heat recovered from rotary compressors. 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. An adequate receiver capacity for the VS units is 1/2 gallon
for each cfm delivered by the compressor package. The VS11 package is offered mounted on an optional 80
gallon receiver.
MOISTURE SEPARATOR/TRAP - Since the unit is equipped with a built-in aftercooler, a combination moisture
separator and drain valve is furnished (loose) with the unit. The device must be piped at the outlet of the
compressor package during final installation. This device is not used on packages equipped with integrated
dryers.
CONTROL PIPING - Control piping is not necessary since the Gardner Denver compressor package is factory
wired and piped for the control system specified.
INLET LINE – The air filter assembly used in the VS compressor package is not suitable for relocation, as its
housing assembly is an integral part of the enclosure sheet metal components. See “LOCATION” comments in
this section of the manual for duct work recommendations to bring in ventilation air.
DISCHARGE SERVICE LINE - The discharge service line connection on the air-cooled units is located at the
upper leftt-hand area of the intake grill side of the enclosure. Gardner Denver compressor packages are
inherently isolated from the service line by their own minimum pressure/check valves. Installer or end user must
ensure that other compressors that are piped into a common pipe manifold with the Gardner Denver compressor
package are each provided with an isolation check valve. It is recommended that an additional receiver be
installed between the rotary screw and reciprocating compressors sharing a common pipeline. Do not install
another check valve in the unit’s discharge line as operational upsets will occur.
Discharge air used for breathing will cause severe injury or death.
Consult filtration specialists for additional filtration and treatment equipment to
meet health and safety standards.
BLOW DOWN VALVE PIPING – The blow down valve is vented between the air filter and inlet valve, thus
avoiding the need of any external pipe work.