Parker V200 User manual

Auto Purger Model V200
Product Bulletin 75-00 E
Contact Information:
Parker Hannin Corporation
Refrigerating Specialties Division
2445 South 25th. Avenue
Broadview, IL 60155-3891
phone [phone]
fax [phone]
www.parker.com/refspec
Customer Value
Proposition:
The Model V200 Auto Purger is a
unique energy-saving device designed
to efficiently remove foreign non-
condensable gases from ammonia
refrigeration systems.
Product Features:
• Smaller compact design with
equivalent capacity of our current
model
• Light weight (65 lbs)
• Proprietary microprocessor control
for all sensing and control functions
• Factory calibrated and wired
• Auto or manual cycling capabilities
• Up to 36 “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 purge cycles and
times for each purge point during a
7 day period
• Purger is made of corrosion resistant
material

Page 2 / Bulletin 75-00 E
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 evap 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
Evaporative Condenser Purge Point
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)
Auto Purger (Model V200) Mutiple Purge Points
High Pressure
Gas
Refrigerant
Foul Gas
Liquid
Refrigerant
P
Liquid
Refrigerant
Foul
Gas
High Pressure Receiver Purge Point
P

Bulletin 75-00 E / Page 3
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 Low Temp. Liquid
High Pressure Gas
Non-Condensable
Gases
Auto Purger (Model V200) Fill and Cool Down
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.
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.
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
Flow
Controller
Water

Page 4 / Bulletin 75-00 E
Auto Purger (Model V200) Separating Non-Condensables Gases
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.
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.
As the non-condensable gases and
residual amounts of refrigerant
enters the bubbler they 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.
Installation Instructions
1. Mount the Rapid Auto Purger to a
wall or structure that can easily
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
Low Temp. Liquid
High Pressure Gas
Non-Condensable
Gases
Flow
Controller
Water

Bulletin 75-00 E / Page 5
Auto Purger (Model V200) Release of Non-Condensable Gases
handle its weight and installation
hardware. Make sure to leave
access for servicing the unit if
required. Pipe the unit into the
refrigeration system along with an
electrical supply, water, and a water
drain as needed.
Note: Wire only one purge point
solenoid to each controller contact
relay. See electrical wiring diagram
on page 6.
2. Before opening the purger to the
refrigeration system turn power on
to the controller and open the water
supply ball valve.
3. is is done by pressing and holding
the “Initiate” (INIT) button on
27.25”
12.375”
35.75”
Auto Purger (Model V200) Compact Design Dimensions
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