Parker V200 User manual

Auto Purger Model V200
Product Bulletin 75-00 J
Contact Information:
Parker Hannin Corporation
Refrigerating Specialties Division
2445 South 25th. Avenue
Broadview, IL 60155-3891
phone [phone]
fax [phone]
www.parker.com
Pressure Rating: 21 bar (305 psig)
Purpose:
The Model V200 Auto Purger is
a unique energy-saving device
designed to efciently remove
foreign non-condensable gases from
ammonia refrigeration systems.
Product Features:
Smaller compact design with •
equivalent capacity of our current
model
Light weight 29.5 kg (65 lbs) •
Proprietary microprocessor control •
for all sensing and control functions
Factory calibrated and wired •
Auto or manual cycling capabilities •
Up to 20 “Purge Points” •
Automatically adjusts vent pressures •
Energy saving sleep mode that •
will activate with lack of non-
condensables
Electronic level, temperature, and •
pressure monitoring for improved
performance
Records number of purger cycles •
and times for each purge point
during a 7 day period
Purger is made of corrosion •
resistant material

Page 2 / Bulletin 75-00 J
High
Pressure
Receiver
Evaporative
Condenser
Auto Purger
(Model V200)
Evaporator
Liquid Line
Liquid
Refrigerant
Line
Gas
Refrigerant
Line
Foul
Gas
Line
P
P
P
P
P
Purge Points (P)
V200 Auto Purger Multiple Purge Points
High
Pressure
Gas
Refrigerant
Foul
Gas
Liquid
Refrigerant
P
High Pressure Receiver
Purge Point
Liquid
Refrigerant
Foul
Gas
P
Introduction
Non-condensables like air, hydrogen,
nitrogen, and hydrocarbon gases
reduce the overall capacity of
the refrigeration system. Higher
pressures, which in turn causes
longer compressor runtime, longer
condenser fan runtime, higher
compressor discharge temperatures,
increase compressor power costs,
increase wear and tear on equipment,
increase leaks, reduce system
eciency, increase overall system
energy costs are all consequences of
non-condensables in the refrigeration
system.
In a refrigeration system non-
condensables can be introduced by:
• Inadequate system evacuation such
as servicing compressors, strainers,
valves, start-up, etc.
• Refrigerant additions
• Leaks from valve stem packings,
bonnet gasket, compressor shaft
seal, control transducers, etc.
• Separation of ammonia molecules
(hydrogen and nitrogen)
• Compressor oil breakdown
(hydrocarbon gases)
e base V200 Rapid Auto Purger
removes the non-condensable gases
from four purge points. With the
addition of up to two slave units, 36
purge points possible. is leads to
lower condensing pressure, runtime
of the compressors, and operating
costs.
Non-condensable indicators
are excessively high condensing
temperatures/pressures and
saturated temperature/pressure
deviations. One indicator is a higher
saturated condensing pressure/
temperature at the condenser for
the given outdoor air wet bulb
and heat rejection load. Another
indicator is the increasing dierence
between the observed condensing
pressure and the saturation
pressure corresponding to the liquid
refrigerant temperature exiting the
condenser.
Purge Points
e most common purge points
in a refrigeration system are at the
condenser drain, pilot receivers,
thermosyphon receivers, high
pressure receivers, liquid drain
header, equalizing lines, and low
velocity-high side areas.
Purge points should be located to
ensure no liquid refrigerant is drawn
by the purger. e Auto Purger V200
has a liquid drainer at the foul gas
inlet to prevent any liquid refrigerant
from entering the shell side of the
heat exchanger.
Auto Purging
e start of a purge cycle can
commence automatically, manually,
time based, central management,
and/or using the microprocessor. e
Auto Purger V200 can only purge one
point at any given time.
In automatic mode each purge point
is sampled for a minimum of ve
minutes. If the purge conditions are
not met within the sample time limit,
the Auto Purger continues to the next
purge point. When a purge point
meets the purge conditions within
the sample time limit the Auto Purger
starts the purge cycle. e purge
cycle shuts o when the non-purge
conditions are met.
Evaporative Condenser
Purge Point

Bulletin 75-00 J / Page 3
V200 Auto Purger Fill and Cool Down
Pressure Transducer
Suction
Line
Vent
Solenoid
Bubbler
Water Inlet
Water
Drain
line
Level
Sensor
Heat
Exchanger
Oil
Drain
Foul Gas line
Liquid
Drainer
Check Valve
w/ Orice
Liquid
Refrigerant
Line
Check
Valve w/
Orice
Liquid
Solenoid
w/ Check
Valve
& Orice
Vapor Vent
Flow
Controller
Check Valve
w/ Orice
Flow
Controller
Low Temp. Liquid
High Pressure Gas
Non-Condensable
Gases
Water
A built in feature of the Auto Purger
is sleep mode. Sleep mode allows the
system to bypass purge points after
two cycles of not meeting the purge
conditions within the minimum
sample time of ve minutes. After the
Auto Purger samples each purge point
twice without a vent occurring, the
system will shut o for two hours.
Purge Cycle
e purge cycle consist of three main
operations: ll & pre-cool, separating
non-condensable gases & refrigerant,
and the release of non-condensable
gases.
1. Fill & Pre-Cool
Foul gas enters the V200 Auto
purger at the foul gas line. e
liquid drainer separates the liquid
refrigerant from the foul gas.
Using the suction line; the liquid
refrigerant from the liquid drainer
is transported to the shell side of the
heat exchanger.
Liquid makeup to the heat
exchanger is controlled by the
level sensor. As liquid refrigerant
boils o in the heat exchanger the
level drops. When the refrigerant
reaches a critical level the sensor
energizes the liquid solenoid,
opening the check valve, and letting
liquid refrigerant through to ll up
the heat exchanger. e level sensor
is set on a timer to prevent from over
lling the heat exchanger.

Page 4 / Bulletin 75-00 J
V200 Auto Purger Separating Non-Condensables Gases
WARNING
Do not trap the foul line prior to
entering the purger foul gas line.
is will cause the foul gas to
condense.
!
Pressure Transducer
Suction
Line
Vent
Solenoid
Bubbler
Water Inlet
Water
Drain
line
Level
Sensor
Heat
Exchanger
Oil
Drain
Foul Gas line
Liquid
Drainer
Check Valve
w/ Orice
Liquid
Refrigerant
Line
Check
Valve w/
Orice
Liquid
Solenoid
w/ Check
Valve
& Orice
Vapor Vent
Flow
Controller
Check Valve
w/ Orice
Flow
Controller
Low Temp. Liquid
High Pressure Gas
Non-Condensable
Gases
Water
2. Separating Non-Condensable
Gases & Refrigerant
e foul gas enters the heat
exchanger through a check valve
with an orice and condenses
immediately. e non-condensable
gases remain in a gas state, because
the non-condensable gases require
lower temperatures to condense.
Condensed refrigerant and non-
condensable gases rise through the
heat exchanger and into the vapor
vent. As the liquid rises it lifts an
orice, ow controller, to the top of
the vapor vent allowing pressure to
build. Once the pressure exceeds
the high pressure check valve the
refrigerant then ows back into the
tube side of the heat exchanger.
e high pressure refrigerant
runs through the tubes of the heat
exchanger absorbing heat from the
high temperature foul gas of the
shell side of the heat exchanger. e
refrigerant begins to boil and vapor
refrigerant, free of non-condensable
gases, is returned to the plant by the
suction line.
Any oil that may collect in the V200
purger can be drained o from the
two oil drains. Before draining the
oil, shut-o the purger and close the
liquid and foul gas valves. Allow the
purger to pump out any remaining
refrigerant and close the suction
line valve. Use normal oil draining
precautions to prevent injury or
property damage.

Bulletin 75-00 J / Page 5
V200 Auto Purger Release of Non-Condensable Gases
Pressure Transducer
Suction
Line
Vent
Solenoid
Bubbler
Water Inlet
Water
Drain
line
Level
Sensor
Heat
Exchanger
Oil
Drain
Foul Gas line
Liquid
Drainer
Check Valve
w/ Orice
Liquid
Refrigerant
Line
Check
Valve w/
Orice
Liquid
Solenoid
w/ Check
Valve
& Orice
Vapor Vent
Flow
Controller
Check Valve
w/ Orice
Flow
Controller
Low Temp. Liquid
High Pressure Gas
Non-Condensable
Gases
Water
3. Release of Non-Condensable Gases
As the refrigerant level drops in
the vapor vent the oat will fall
allowing the non-condensable gases
to escape through the orice. Non-
condensable gases will continue to
accumulate, producing an elevated
pressure. Once the pressure of the
non-condensable gases exceed
the set point of the vent solenoid
and vent check valve with orice,
the gases are then released into
the bubbler. At the same time the
vent solenoid is activated the water
supply solenoid is also activated.
Non-condensable gases and
residual amounts of refrigerant
entering the bubbler are diluted
into the water. As the water in the
bubbler rises it will overow the
drain tube and exit the drain line.
Once the vent line pressure drops
below the pressure switch set point
the vent solenoid and water supply
solenoid close.