Line, Discharge Service - Gardner Denver EDF-KB Operating And Service Manual

* (OPTIONAL) WATER CONTROL VALVE AND WATER SHUTOFF VALVE MUST BE ORDERED SEPARATELY.
FIGURE 2–7 – SERIES PIPING
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 both water–cooled and air–cooled
units is made at the right hand corner of the unit, viewed
from the opposite end from control panel side. When
manifolding two or more rotary screw units on the same
line, each unit is isolated by the check valve in the unit
discharge line. If a rotary screw unit is manifolded to
another compressor, be sure the other compressor has
a check valve in the line between the machine and the
manifold. If a rotary screw and a reciprocating com-
pressor are manifolded together, an air receiver must
be located between the two units.
Discharge air used for breathing will
cause severe injury or death.
Consult filtration specialists for addi-
tional filtration and treatment equip-
ment to meet health and safety stan-
dards.
BLOWDOWN VALVE PIPING – The blowdown valve
is fitted with a muffler for operation indoors. If the instal-
lation requires, the muffler may be removed and the
FIGURE 2–8 – PARALLEL PIPING
blowdown valve piped to the outside with a pipe size the
same as the blowdown valve outlet connection.
WATER PIPING (Water–Cooled Heat Exchanger
Models Only) – On machines equipped with water–
cooled heat exchangers, the water inlet and outlet con-
nections are located in the unit base flange on the left
side of the unit.
The water source should be capable of supplying up to
the maximum flow shown in FIGURE 2–5 and
FIGURE 2–6, page 11, at a minimum pressure of 40
psig (2.8 Bars); maximum allowable water pressure is
150 psig (10.3 Bars). The water flow rates shown are
approximate and a guide to sizing piping, cooling tower
and other water system equipment.
The heat exchanger system is designed to operate with
water inlet temperatures from 60 to 90 F (16 to 32
C) and a water outlet temperature not to exceed 110 F
(43 C). If water cooler than 60 F is used, high water
outlet temperatures (over 110 F, 43 C) will be experi-
enced along with shortened heat exchanger life caused
by tube fouling and corrosion. If water warmer than 90
F (32 C) is used, higher compressor oil inlet tempera-
tures and high water usage will result.
Most water systems will require control of impurities:
filtration, softening or other treatment. See "Compres-
sor Oil Cooler – Water–Cooled Heat Exchanger" for
more information on the water system.
SERIES PIPING (FIGURE 2–7) – Water flow must be
through aftercooler first for effective cooling of dis-
charge air and is so piped on the standard water–
cooled unit.
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