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13-25-608 Page 16
INSTALLATION FOR COLD WEATHER OPERATION
(Figure 2-3, page 15) - It is recommended that
the unit be installed inside a shelter that will be heated to temperatures above freezing (32
o
F, 0
o
C). This
will eliminate many of the problems associated with operating units in cold climates, such as freezing in
control lines and downstream of the cooler.
Refer to Engineering Data Sheet 13-9-411 for the advantages of using the heat recovered from rotary
compressors. This heat recovery could easily pay for an adequate shelter for the unit.
When the unit must be installed in an outdoors installation and/or exposed to ambient temperatures below
freezing (32
o
F, 0
o
C), contact Gardner Denver for recommendations.
When using a Total System with a compressed air dryer option, refer to Section 10 for details.
Unsheltered (outdoors) installation shall be avoided. Installation next to a
heated building may be sufficient to keep the compressor package room above
freezing temperature and thus avoid operational complications.
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
OPTIONAL MOISTURE
SEPARATOR/TRAP
- The unit can be provided with an optional stand-alone
combination moisture separator and trap that is field-installed downstream of the after cooler.
CONTROL PIPING
- Control piping is not necessary since the rotary screw unit is factory wired and piped
for the control system specified.
INLET LINE
- The filter is close-coupled to the compressor intake flange, thus no inlet line is used or
recommended.
DISCHARGE SERVICE LINE
- The discharge service line connection is provided at the outlet of the field
installed water separator, which in turn is located at the upper right hand side of the inlet air grill.
A hand operated valve, (air service valve) and a separate (swing-type) check valve must be installed
between the unit and the customer
’s air system. If a fast operating valve such as a ball valve is used, it
must be closed slowly to give the intake valve time to shut and keep the discharge pressure from spiking.
When using a Total System, refer to Section 10 for details.
The controller has an automatic start/stop sequence built in. You do NOT need
to close the air service valve. Closing the air service valve on start-up or prior
to shutdown will cause rapid cycling, and could cause a high pressure
shutdown.
Summary of Contents for APEX25-30B
Page 11: ...13 25 608 Page 10 Figure 1 2 COMPRESSOR ILLUSTRATION VARIABLE SPEED 304USC797 01 Ref Drawing...
Page 12: ...13 25 608 Page 11 Figure 1 3 COMPRESSOR ILLUSTRATION FIXED SPEED 305USC797 01 Ref Drawing...
Page 27: ...13 25 608 Page 26 Figure 4 2 WIRING DIAGRAM VS 230 VOLT 306USC546 01 Ref Drawing Page 1 of 4...
Page 28: ...13 25 608 Page 27 Figure 4 3 WIRING DIAGRAM VS 230 VOLT 306USC546 01 Ref Drawing Page 2 of 4...
Page 29: ...13 25 608 Page 28 Figure 4 3 WIRING DIAGRAM VS 230 VOLT 306USC546 01 Ref Drawing Page 3 of 4...
Page 30: ...13 25 608 Page 29 Figure 4 3 WIRING DIAGRAM VS 230 VOLT 306USC546 01 Ref Drawing Page 4 of 4...
Page 31: ...13 25 608 Page 30 Figure 4 3 WIRING DIAGRAM VS 575 VOLT 307USC546 02 Ref Drawing Page 1 of 4...
Page 32: ...13 25 608 Page 31 Figure 4 4 WIRING DIAGRAM VS 575 VOLT 307USC546 02 Ref Drawing Page 2 of 4...
Page 33: ...13 25 608 Page 32 Figure 4 4 WIRING DIAGRAM VS 575 VOLT 307USC546 02 Ref Drawing Page 3 of 4...
Page 34: ...13 25 608 Page 33 Figure 4 4 WIRING DIAGRAM VS 575 VOLT 307USC546 02 Ref Drawing Page 4 of 4...
Page 45: ...13 25 608 Page 44 Figure 4 7 WIRING DIAGRAM FS 575 VOLT 309USC546 01 Ref Drawing Page 1 of 3...
Page 46: ...13 25 608 Page 45 Figure 4 8 WIRING DIAGRAM FS 575 VOLT 309USC546 01 Ref Drawing Page 2 of 3...
Page 47: ...13 25 608 Page 46 Figure 4 8 WIRING DIAGRAM FS 575 VOLT 309USC546 01 Ref Drawing Page 3 of 3...
Page 51: ...13 25 608 Page 50 Figure 4 8 PIPING AND INSTRUMENTATION ILLUSTRATIONJ 301USC797 C Ref Drawing...
Page 86: ...NOTES...
Page 87: ...NOTES...