13-10-618 Page 17
Extreme Cold Weather Operation
(Down To -10
°
F, -23
°
C)
In addition to the above, the following should be provided:
1.
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 in these low temperatures. Since shutters are not provided
as a factory option, blocking off a portion of the cooler with plywood should be satisfactory.
2.
Auto operation should not be used in extreme environments.
3.
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 (-12
°
C) environment for
coolers, motor and sump. Figure 2-3, page 16, 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 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. 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 the unit is equipped with a built-in aftercooler, a combination
moisture separator and trap is furnished with the unit. A means of draining condensate will be needed.
CONTROL PIPING
- Control piping is not necessary since the Electra-Saver unit is factory wired and
piped for the control system specified.
Length of Inlet Line
Diameter of Pipe Size
0 to 10 Feet (0 to 3 Meters)
Same as Compressor Inlet Opening
10 to 17 Feet (3 to 5 Meters)
One Size Larger Than Inlet Opening
17 to 38 Feet (5 to 11.5 Meters)
Two Sizes Larger Than Inlet Opening
Figure 2-4 – INLET LINE LENGTHS
Summary of Contents for AirSmart EAU99T
Page 13: ...13 10 618 Page 12 Figure 1 6 PACKAGE AIR OIL FLOW DIAGRAM 202EDM797 Ref Drawing...
Page 39: ...13 10 618 Page 38 Figure 4 8 CONTROL SCHEMATIC COMPRESSOR AT FULL LOAD 206EAU797 B Ref Drawing...
Page 42: ...13 10 618 Page 41 Figure 4 11 WIRING DIAGRAM WYE DELTA 329EAU546 A Ref Drawing Page 1 of 2...
Page 43: ...13 10 618 Page 42 329EAU546 A Ref Drawing Page 2 of 2...
Page 44: ...13 10 618 Page 43 Figure 4 12 WIRING DIAGRAM WYE DELTA 330EAU546 A Ref Drawing Page 1 of 2...
Page 45: ...13 10 618 Page 44 330EAU546 A Ref Drawing Page 2 of 2...
Page 49: ...13 10 618 Page 48 Figure 5 3 FLOW DIAGRAM 210EAU797 B Ref Drawing...
