Advantage OACS Series, Инструкция по эксплуатации

Страница: 22 / 86

OACS Central Chillers : with MG Series Control Instrument
Page: 22
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
3.1 GENERAL
A. Failure to follow the factory required operations procedure may adversely affect the unit’s
ability to adequately control process temperature and may create a hazardous operating
condition which may result in serious operator injury and/or unit damage.
B. IMPORTANT. If this unit contains a hermetic or semi-hermetic reciprocating compressor
it is equipped with a crankcase heater on the compressor. While the compressor is idle,
the crankcase heater prevents freon vapor from migrating to and condensing in the
compressor crankcase. If freon is allowed to condense in the crankcase, it can be drawn
into the cylinders upon start up. This can cause catastrophic damage to the connecting
rods, pistons, and valve plates.
To avoid this, BEFORE THE UNIT IS STARTED, THE POWER SUPPLY SHOULD BE
APPLIED TO THE UNIT FOR AT LEAST 12 HOURS, OR UNTIL THE BOTTOM OF
THE COMPRESSOR IS WARM TO THE TOUCH.
If the power has been disconnected more than two hours, the power should be applied
for six hours before restarting. Power should be applied to the unit continuously, except
for service purposes. The crankcase heater should be checked for proper operation on a
regular basis.
C. The OPERATIONS segment of this manual is divided into the following sections:
3.2 Start up/operations - follow this segment to start the unit after the initial
installation to the process system or to restart the unit after re-installation to the
same or different process system. This section includes information on system
fill, electric motor phasing (motor rotation) and process flow adjustments.
3.3 Chiller Control - follow this segment to start up and operate the chiller control.
This section includes information on setpoint selection and adjustment, and
feature explanations. There are three types of control that can be installed on the
OACS unit:
a. M1 Controller
b. LE Controller
c. MZC III Controller
3.4 Shut down procedure - follow this segment to shut down the unit. This segment
includes information on system shut down, electrical power supply precautions,
and disconnection from system.
WARNING: Follow all Factory operations procedures. Failure to do so may create a hazardous
operating condition which may result in serious operator injury and/or unit damage.