13–8–612 Page 10
Do not operate the compressor with
the fan and belt guard removed.
Exposed fan and belts may cause
injury to personnel.
INSTALLATION FOR COLD WEATHER OPERA-
TION (FIGURE 2–3, page 9) – 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 ad-
vantages of using the heat recovered from rotary com-
pressors. This heat recovery could easily pay for an ad-
equate shelter for the unit.
When an outside installation must be made, the pre-
cautions required will depend on the severity of the en-
vironment. The following are general guidelines for
outside installations:
Cold Weather (Down To +10
o
F)
1.
Be sure all drains, traps, and control lines, in-
cluding pressure transducer lines are heated to
avoid freezing of condensate. Heat tape with
thermostat control is generally satisfactory for
this purpose and can be obtained at various local
plumbing or hardware outlets at nominal cost.
2.
If an air–cooled aftercooler is to be used, provi-
sions to bypass the aftercooler must be made.
Since cold air contains very little moisture, suc-
cessful operation can be achieved without the
aftercooler.
3.
Provide at least some simple shelter such as a
plywood windbreak to protect against drifting
snow.
4.
Use only Gardner Denver
R
AEON
t
9000 SP
lubricant.
5.
Monitor unit carefully during start–up and opera-
tion to be sure it is functioning normally.
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.
OPTIONAL MOISTURE SEPARATOR/TRAP – The
unit is equipped with a built–in aftercooler, a combina-
tion moisture separator and trap is furnished as an op-
tion to the unit. This should be piped into the system
down stream of the aftercooler.
CONTROL PIPING – Control piping is not necessary
since the Electra–Screw
R
unit is factory wired and
piped for the control system specified.
INLET LINE – Where an inlet line is used between the
air filter and the compressor, it must be thoroughly
cleaned on the inside to prevent dirt or scale from en-
tering the compressor. If welded construction is
used, the line must be shot blasted and cleaned to
remove welding scale. In either case, the inlet line
must be coated internally by galvanizing or painting
with a moisture and oil–proof sealing lacquer. Up to ten
(10) feet in length, the inlet line should be the full size
of the inlet opening on the compressor. If an extra–
long line is necessary, the pipe size should be in-
creased according to Inlet Line Length Chart below.
Accessibility for inlet air filter servicing must be consid-
ered when relocating the filters from the unit to a remote
location.
DISCHARGE SERVICE LINE – The discharge service
line connection is made at the lower right hand corner
of the cooler, viewed from the oil cooler side. A hand op-
erated valve, (air service valve) must be installed be-
INLET LINE LENGTHS
Length of Inlet Line
Diameter of Pipe Size
0 to 10 Feet
Same as Compressor Inlet Opening
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 to 17 Feet
One Size Larger Than Inlet Opening
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 to 38 Feet
Two Sizes Larger Than Inlet Opening
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Contents for EBB BB-7.5 HP
Page 12: ...13 8 612 Page 2 FIGURE 1 2 PACKAGE COMPRESSOR MOTOR SIDE FIGURE 1 3 PACKAGE BELT GUARD SIDE...
Page 13: ...13 8 612 Page 3 FIGURE 1 4 PACKAGE CONTROLLER END...
Page 16: ...13 8 612 Page 6 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 17: ...13 8 612 Page 7 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 32: ...13 8 612 Page 22 FIGURE 4 7 AUTO SENTRY S SOLID STATE CONTROL TOUCH PAD...
Page 33: ...13 8 612 Page 23 200EBB546 Ref Drawing FIGURE 4 8 WIRING DIAGRAM...
Page 53: ...13 8 612 Page 43 PIPING AND MOUNTING GROUP 213EBB810 B Ref Drawing...
Page 77: ...13 8 612 Page 67 INTEGRATED DRYER ASSEMBLY AND PIPING 301EBB810 A Ref Drawing...
Page 82: ...13 8 612 Page 72 300EBB541 B Ref Drawing...
Page 84: ......
