Gardner Denver ELECTRA-SAVER EAU PD - 200 HP, Руководство по эксплуатации и обслуживанию

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13–10–612 Page 10
FIGURE 2–3 – PIPING SCHEMATIC
When the oil cooler is mounted above the compressor
unit, a check valve is to be mounted on the compressor
unit in the line to the oil cooler; see FIGURE 5–5, page
39. A pneumatic pilot–operated normally–closed valve
is to be mounted at the oil filter inlet on the compressor
unit line from the oil cooler; see FIGURE 5–5, page 39.
The check valve permits oil flow to the oil cooler during
operation, but prevents return oil flow from the cooler
when the unit is shut down. The pilot valve is held open
by air pressure from the unit oil reservoir during opera-
tion and closes under spring load when the unit is shut
down to prevent return oil flow from the oil cooler.
An oil filler stand pipe and plug must be located in the
piping on the oil cooler module for ease of filling of a re-
mote oil cooler, see FIGURE 5–4, page 38.
Oil Cooler – Installation – Inspect the unit upon arriv-
al. In case of damage, report immediately to the trans-
portation company. Before installation, check the rating
plate on the motor to verify that power input and motor
specification requirements match available electric
power at the point of installation.
1. Set the unit level on a firm, solid foundation. The
larger oil cooler models have lifting holes to facili-
tate unit hoisting.
2. Allow for linear expansion and contraction of pip-
ing in the direction away from the oil cooler. Use
flexible connectors or suitable expansion joints on
all oil cooler inlet and outlet piping. See
FIGURE 2–3 for typical schematics.
3. Select properly tensioned and aligned piping sup-
port clamps or hangers and position them to re-
lieve any piping stress at the oil cooler inlet and
outlet ports. Do not support from flexible connec-
tors.
4. Service – For continuous efficiency, oil cooler
cores must be periodically cleaned with either
vacuum or compressed air. If wet cleaning is re-
quired, shield motor and spray on a mild soap
solution and flush with clear water.
For aluminum oil coolers do not use
any cleaning solution that is not com-
patible with aluminum. Use of im-
proper solution may result in damage
to the cooler.
AUXILIARY AIR RECEIVER – The unit requires an
auxiliary air receiver unless the piping system is large
and provides sufficient storage capacity to prevent rap-
id cycling. When used, an air receiver should be of ade-
quate size, provided with a relief valve of proper setting,
a pressure gauge, and a means of draining conden-
sate.
AFTERCOOLER (FIGURE 1–2 and FIGURE 1–3,
page 2) – An aftercooler will provide control of moisture
entering the shop air lines while reducing the normal
low discharge temperature of about 180
_
F at 100
PSIG discharge pressure to near inlet air temperature,
or cooling water temperature.
Air–Cooled Machines – When an aftercooler is fur-
nished on an air–cooled machine, the aftercooler is
installed on the oil cooler module between the fan and
the oil cooler. The moisture separator is furnished by
Gardner Denver but must be mounted by the customer
between the aftercooler and the auxiliary air receiver
with a condensate drain provided at the bottom. All air
piping from the compressor discharge to aftercooler to
auxiliary air receiver is to be furnished and mounted by
the customer. The design of the aftercooler piping