Gardner Denver AUTO SENTRY EAU99G Operating And Service Manual page 50

AFTERCOOLER PIPING - At shutdown of the system, all units should be drained completely of
condensate if there is any possibility of freezing or corrosion damage. To help remove the condensate,
the cooler may be tapped per Figure 5-5, page 42, and a drain cock installed. After opening the drain
cock, blow air into the cooler from a connection on the opposite side of the cooler. At the same time the
connection on the drain side of the cooler should be plugged. The drain cock should be left open until the
machines are ready for start-up.
Failure to remove condensate from an idle cooler in freezing temperatures will
cause permanent cooler damage. Drain condensate after system shutdown. It
is the owner/operator's responsibility to ensure that condensate has been
drained and cooler dried out to prevent cooler damage.
When removing the cooling module from the package for remote operation, do
not use the flexible coupling (when supplied) between the air/oil separator
housing and the minimum pressure/check valve. The discharge piping from the
air/oil separator housing should be piped into the minimum pressure/check
valve, then into piping to the cooler, with a flexible connection between the
minimum pressure/check valve and aftercooler to keep the weight of the piping
off of the cooler.
HEAT EXCHANGER (OIL) PIPING - All remote elevated cooler applications must be sent through
Engineering for approval and for recommending pipe size. When the cooling module is removed from the
package, the thermal mixing valve (H) remains on the package. The new control group will be mounted
on package at the factory. This group controls the oil stop valve as well as not allowing machine to run
blowndown. See Figure 5-4, page 41.
Remote mounted elevated coolers have a maximum pipe length of 30 feet (9 m)
(each way) and a maximum height of 20 feet (6 m) with a minimum of fittings. A
remote elevated cooler form, J214, is required to be filled out. Customer
Service will review all forms while in the quote stage. Customer Service will
include the filled out J214 form on any special orders sent to Engineering.
When removing the cooling module from the package for remote operation, the
oil stop valve and the check valve that are shipped loose should be mounted as
close to the compressor package as possible. Flexible connections should be
used to keep the weight of the piping off of the cooler.
WARNING
NOTICE
NOTICE
NOTICE
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