Gardner Denver ELECTRA-SAVER EAU PD - 200 HP, Operating And Service Manual, Page: 23 / 65

13–10–612 Page 13
AFTERCOOLER
Approx.
Water Temperature to Heat Exchanger Water Pressure
Rated Maximum Drop @
Pressure Water Maximum Flow
Size PSIG 60
_
F. 70
_
F. 80
_
F. 90
_
F. Flow (PSI)
200 HP ALL 19 24 32 48 60 21.0
250 HP ALL 24 30 40 60 60 23.0
300 HP ALL 29 36 48 ––– 60 25.0
HEAT EXCHANGER
Approx.
Water Temperature to Heat Exchanger Water Pressure
Rated Maximum Drop @
Pressure Water Maximum Flow
Size PSIG 60
_
F. 70
_
F. 80
_
F. 90
_
F. Flow (PSI)
200 HP ALL 4.7 5.8 7.8 11.6 37.0 3.5
250 HP ALL 6.4 8.0 10.6 16.0 37.0 3.5
300 HP ALL 7.9 9.9 13.2 19.7 50.0 2.0
FIGURE 2–7 – HEAT EXCHANGER (OIL COOLER) APPROXIMATE WATER FLOW (U.S. Gallons/Minute)
The maximum water flow shown is that allowable through the heat exchanger.
FIGURE 2–8 – AFTERCOOLER APPROXIMATE WATER FLOW (U.S. Gallons/Minute)
Water flow rates (gpm) are based on 110
_
F. water temperature out of cooler. Maximum water flow shown is the maximum allowable flow
through the aftercooler.
opening on the compressor. If an extra–long line is nec-
essary, the pipe size should be increased. See
FIGURE 2–6 , Page12.
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 on water–cooled units with aftercooler
is made at the moisture separator. On air–cooled units
and water–cooled without aftercooler, the connection
is made at the pipe nipple located behind the instru-
ment panel. When manifolding two or more Electra–
Saver units on the same line, each unit is isolated by
the check valve in the unit discharge line.
If an Electra–Saver unit is manifolded to another com-
pressor, be sure the other compressor has a check
valve in the line between the machine and the manifold.
If an Electra–Saver and a reciprocating compressor
are manifolded together, an air receiver must be lo-
cated between the two units.
Do not use the air discharged from
this unit for breathing – it is not
suitable for human consumption.
Use of this air for breathing may
result in personal injury or death.
WATER PIPING (Water–Cooled Heat Exchanger
Models Only) – On machines equipped with a water–
cooled heat exchanger, pipe water to the inlet of the
heat exchanger. Pipe outlet water from the outlet or
magnetic water shutoff valve to a sump or drain. The
thermal bulb of the water flow control valve is inserted
in the heat exchanger oil outlet line; refer to the unit out-
line drawing for location.
The water source should be capable of supplying up to
the maximum flow shown in FIGURE 2–7, at a mini-