Advantage BG-N4 Series, Instruction Manual

Page: 56 / 76

BG-N4 Glycol Chiller
Page: 56
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
6.1 WATER SYSTEM
A. MOTOR/PUMP ASSEMBLY: The motor/pump assembly
circulates chilled fluid to the process loop. The pump
assembly is built of total stainless steel to maintain water
quality.
B. RESERVOIR. The vented reservoir is sized for the chiller
application to support the flow rate. The reservoir provides a stable
water temperature under varying load conditions.
6.2 REFRIGERATION SYSTEM
A. COMPRESSOR: Compressors take low pressure/low temperature
refrigerant gas and compress the gas into high pressure/high
temperature gas.
B. AIR COOLED CONDENSER: The air cooled condenser removes
heat from the compressed refrigerant gas. The action causes
the gas to “condense” into a liquid state still under high pressure.
Air flow across the condenser is achieved via a motor driven fan
assembly or centrifugal blower.
C. FILTER-DRIER: The filter-drier removes contaminants and
moisture from the liquid refrigerant.
D. LIQUID LINE SOLENOID VALVE: Controlled by the instrument,
this valve closes when the compressor cycles off to prevent
refrigerant liquid from migrating to the evaporator. The valve
opens when the compressor cycles on.
E. REFRIGERANT SIGHT GLASS: The refrigerant sight glass
indicates refrigerant charge and moisture content (figure 6.2F).
• Full refrigerant charge is determined by a clear liquid
flow.
• Bubbles indicate low refrigerant.
• Moisture content is indicated by the color of the
element.
• Element color is normally green.
• If the color of the element is chartreuse or yellow, the
system has been contaminated with moisture. In such
case, the filter-drier must be replaced. The replacement of
the filter-drier must be completed by a qualified refrigerant
service technician.
F. EXPANSION VALVE: The expansion valve throttles flow of refrigerant liquid into the
evaporator and creates a pressure drop in the refrigerant system that allows the liquid
refrigerant to “boil off” inside the evaporator.
Typical filter drier
Typical air-cooled condenser
Typical Reservoir
Typical scroll compressor
Typical Coolant Pump