Gardner Denver AUTO SENTRY EAU99G Operating And Service Manual page 25

SERIES PIPING (Figure 2-7, page 17) - Water flow must be through aftercooler first for effective cooling
of discharge air and is so piped on the standard water-cooled unit.
PARALLEL PIPING (Figure 2-8, page 17) - A separate water control valve is required to control the
discharge air temperature. If a remote (externally mounted) water-cooled aftercooler is piped in parallel
with the heat exchanger, provide a separate water control valve for the aftercooler and pipe separate inlet
water lines to both the aftercooler and heat exchanger.
The water control valve is to be adjusted to maintain oil out of the heat exchanger within the 140° F to
150° F (60° C to 66° C) range regardless of inlet water flow or temperature as long as a minimum flow for
a given temperature is met (Figure 2-5, page 15 and Figure 2-6, page 15. See Section 5, for adjustment
instructions and maximum allowable lubricant temperature.
ELECTRICAL WIRING - Standard Units - The Electra-Saver compressor is factory wired for all starter
to motor and control connections for the voltage specified on the order. It is necessary only to connect
the unit starter to the correct power supply. The standard unit is supplied with an open drip-proof motor, a
NEMA 12 starter and control enclosure. See "Location" paragraph, page 9, for distance to the nearest
obstruction on starter and control box sides of the unit.
Lower operating voltages (200/208) require that the unit starter be remote mounted since the starter is too
large to be mounted within the control enclosure. If not supplied with the compressor unit, the starter
must be a Size 6 full voltage non-reversing type in NEMA (CEMA) enclosure suitable for the environment,
with two (2) rejection type control circuit fuses (size according to motor starter manufacturer's standard), a
200 (208) volt coil, and three (3) overload heaters for the motor. The overload heaters are to be selected
according to starter manufacturer's tables based on motor nameplate full load amperage.
Electrical shock can cause injury or death. Open main disconnect switch,
lockout and tagout before working on control box.
GROUNDING - Equipment must be grounded in accordance with Table 250-95 of the National Electrical
Code.
Failure to properly ground the compressor package could result in injury or
death. Install ground wiring in accordance with the National Electrical Code
and any applicable local codes.
WARNING
WARNING
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