Proper Cleaning Procedure For Brazed Plate Evaporators - Advantage Engineering Maximum Instruction Manual

MK Series Portable Chiller : Air-Cooled : HE INSTRUMENT
5.6 CHECKING THE REFRIGERANT CHARGE
A. All standard ADVANTAGE chillers
are manufactured with thermostatic
expansion valves as the metering
device to the evaporator.
B. All ADVANTAGE chillers have a
refrigerant sight glass (figure 5.6A)
with a moisture indicator. To check
the refrigerant charge under
normal operating conditions:
1.
2.
3.
4.
5.7 PROPER CLEANING PROCEDURE FOR BRAZED PLATE
EVAPORATORS
A. The brazed plate evaporator is
made of stamped stainless steel
plates, furnace brazed together
with copper based joints. The
complex geometry of the flow
passages promotes turbulent flow
which gives high efficiency and
reduces fouling by mineral
deposits. Large solids such as
plastic pellets or chunks of mineral
deposits will collect at the water
inlet port at the evaporator and
restrict flow through some of the
passages. If this possibility exists, ADVANTAGE recommends filters
or strainers be added to the "from process" line. If the evaporator
becomes fouled there are a couple of methods for cleaning.
Remove the plastic cap
covering the sight glass.
Start the chiller and allow system pressures and
temperatures to stabilize.
With the unit operating at 100% capacity (not in the
"capacity control" mode) the sight glass should appear
clear with no foam or bubbles evident. If foam or bubbles
are evident, the chiller has suffered from a loss of
refrigerant and should be checked by a qualified
refrigeration technician.
The "dot" in the middle of the sight glass is the moisture
indicator. It should appear green at all times. A white or
yellow color indicates moisture has invaded the
refrigeration system, which is detrimental to the life of the
compressor. The filter-drier should be replaced by a
qualified refrigeration technician.
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
Sight Glass
Evaporator
Fax: 317-881-1277
Figure 5.6A
Figure 5.6A
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