Danfoss IPS 8 Instruction manual

User Guide
Intelligent Purger System (IPS 8) for Ammonia
Technical data, installation and use
ir.danfoss.com148R9645

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
2 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Legal notice.................................................................................................................................................................................................................................................................................3
Introduction................................................................................................................................................................................................................................................................................4
Features............................................................................................................................................................................................................................................................................................4
Working principle ...............................................................................................................................................................................................................................................................5
Working cycle...........................................................................................................................................................................................................................................................................6
Air traps............................................................................................................................................................................................................................................................................................7
Connection locations......................................................................................................................................................................................................................................................8
Connection points.......................................................................................................................................................................................................................................................... 10
Installation ................................................................................................................................................................................................................................................................................11
Electrical wiring ................................................................................................................................................................................................................................................................13
Light Indicators...................................................................................................................................................................................................................................................................15
Display........................................................................................................................................................................................................................................................................................... 16
Programming/Configuration............................................................................................................................................................................................................................17
Maintenance/Service/Disposal....................................................................................................................................................................................................................... 19
Technical data ......................................................................................................................................................................................................................................................................20
Ordering......................................................................................................................................................................................................................................................................................20
Contents

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 3
Legal notice This product information is a part of the documentation for the Danfoss scope of delivery and serves
as product presentation and customer advisory service. It contains important information and
technical data regarding the product.
This product information should be supplemented with the information about the industrial safety
and health related regulations at the site of installation of the product. The regulations vary from
place to place as a result of the statutory regulations applicable at the site of installation and are
therefore not considered in this product information.
In addition to this product information and the accident prevention regulations applicable for the
respective country and area where the product is used, the technical regulations for safe and
professional work must also be observed.
This product information has been written in good faith. However, Danfoss cannot be held responsible
for any errors that this document may contain or for their consequences.
Danfoss reserves the right to make technical changes during the course of further development of the
equipment covered by this product information.
Illustrations and drawings in this product information are simplified representations. As a result of
the improvements and changes, it is possible that the illustrations do not exactly match the current
development status. The technical data and dimensions are subject to change. No claims will be
accepted on the basis of them.
Date: YYYY.MM.DD
Place of issue:
Issued by Date: YYYY.MM.DD
Place of issue:
Approved by
Signature:
Name: Su Cheong Ho
Title: Lead Design Engineer
Signature:
Name: Behzad Parastar
Title: Product Manager
Danfoss only vouches for the correctness of the English version of this declaration. In the event of the declaration being translated into any other
language, the translator concerned shall be liable for the correctness of the translation
ID No: 084R9456
This doc. is managed by 500B0577
Revision No:AA Page 1 of
Danfoss A/S
6430 Nordborg
Denmark
CVR nr.: 20 16 57 15
Telephone: [phone]
Fax: [phone]
EU DECLARATION OF CONFORMITY
Danfoss A/S
Refrigeration & Air Conditioning Controls
declares under our sole responsibility that the
Product category:Intelligent Purger System (Air Purger)
Type designation(s):IPS 8
Covered by this declaration is in conformity with the following directive(s), standard(s) or other normative
document(s), provided that the product is used in accordance with our instructions.
Machine Directive 2006/42/EC
EN 378-2:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2: Design,
construction, testing, marking and documentation
IEC 60204-1:2018 Safety requirements for electrical equipment for measurement, control and laboratory use - Part 1:
General requirements
Pressure Equipment Directive 2014/68/EU (PED)
EN 378-2:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2: Design,
construction, testing, marking and documentation
Ammonia side (R717): Category A4P3. Fluid group: 1. PS = 40 bar. TS: -40 C to 60 C
R452A side: Category 1. Fluid group: 2. PS = 28 bar. TS: -40 C to 60 C
Ambient temperature: -10 C to 43 C
Electromagnetic Compatibility Directive 2014/30/EU (EMC)
IEC 61000-6-2 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity standard for industrial
environments (IEC77/488/CDV:2015)
EN 61000-6-4 Electromagnetic compatibiliy (EMC) - Part 6-4: Generic standards - Emission standard for industrial
environments
Note: EMC test performed with cable length < 30m.
1

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
4 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
The Danfoss Intelligent Purger System (IPS 8)
is a stand-alone, self-contained purging unit
designed to remove non-condensable gases
(NC gases = air and other unwanted foreign
gases) from industrial ammonia refrigeration
systems.
The IPS control can handle up to 8 purge points
automatically.
The ingress of NC gases into a refrigeration
system is inevitable, regardless of the refrigerant,
pressures, or temperatures. NC gases in the
system will result in a decrease in system
efficiency, both in terms of an increase in power
consumption and reduced cooling capacity.
Due to having a different density than ammonia,
the ingressed air will accumulate in specific areas
of the system, where it can be removed using the
Danfoss IPS 8.
The accumulation areas are identified in the
Connection locations section, along with
recommended connection principles.
The purger unit is an electronic-controlled, self-
employed R452A refrigerant system that runs
independent of the main ammonia system and
with only one flange connection to the ammonia
plant.
This flanged opening allows access of the
ammonia gas/NC gas mix to the purger
evaporator, where it is divided into ammonia
condensate and NC gases. The ammonia
condensate is returned by gravity to the main
plant, while the NC gases are purged to the
atmosphere through a water bath.
Through the flanged opening, the purger unit
has access to all parameters from the ammonia
plant required for full electronic control.
The unit runs automatically in 24-hour cycles,
checking for the presence of NC gases and, if
present, removed.
To regain the design capacity of the main
ammonia system and prevent future air
accumulation, it is highly recommended to install
the Danfoss IPS 8.
Introduction
Features • State-of-the-art electronic controlled unit
based on the Danfoss MCX controller platform
• Reduced power consumption
• Automatic purging response to NC gases in the
refrigeration system
• Continuous monitoring of differential pressure
between system refrigerant and purger
refrigerant
• Electronic purging that minimizes refrigerant
(ammonia) relief to the environment
• Self-contained unit operation, which functions
independently from the main plant
• An operation log for easy purging cycle data
monitoring
• Self-diagnostics for unit and system operation
to shut down in case of malfunction of air
purger components
• Cost-effective installation with few mechanical
and electrical connection interfaces
• A fully brazed R452A cooling system, which
minimizes leakage risks
• A plug-and-play stand-alone design, which
eases installation and commissioning with low
risk of potential errors
• No need for advanced settings
• A compact and easy-to-handle design
• Patent pending on IPS 8

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 5
Working principle The Danfoss IPS 8 is factory-tested and ready for
use in ammonia plants with a condenser pressure
of more than 6 bar (87 psi). The purger is charged
with 900 gram (31.7 oz) of R452A.
Only 2 mechanical connections are needed for
the purger (see fig. 1). The exchange of ammonia/
NC gases with the main plant is done through
the flange for ammonia access (see 13 in figure
below), while the NC gas purge is done through
the blow-off pipe after the purge restrictor (18).
Through the flange for ammonia access (13), a
mixture of ammonia gas and NC gases enters the
evaporator (12) of the purger.
This ammonia/NC mix is cooled down below
the condensing temperature of the ammonia
by the R452A circuit. At this point, ammonia gas
condenses and returns to the ammonia plant via
gravity, whereas the NC gases accumulates in the
evaporator (12) for subsequent purging.
By condensing the ammonia gas, a new
ammonia/NC gases mix is naturally pulled
through. This new mix is separated through a
continuous process.
While the NC gas concentration in the evaporator
(12) increases, the R452A evaporator pressure
and temperature will continuously lower.
The controller monitors R452A evaporator
pressure and ammonia pressure and temperature
and when R452A pressure reaches a predefined
pressure differential to the ammonia pressure/
temperature, it prepares to purge the NC gases
through the solenoid valve (16). The blow-off
is activated by the solenoid (16) and through
appropriate piping/hosing, it is led into a water
bath. This process is done to retain small amounts
of ammonia (see Installation section).
1 Compressor R452A 11 Expansion valve, R452A
1 Compressor Cranck case heater 12 Evaporator, R452A
2 Thermostat for crankcase heater control 13 Welding Flange
3 Compressor Hi-temp sensor 13 Flange blind blank
4 Pressure safety switch 14 Pressure transmitter evaporator
5 Condenser coil assy 15 Pressure transmitter - R717
5 Fan motor for conderser 16 Solenoid coil, 24V
6 Extration Fan 16 Purger solenoid kit
6 Air grid with filter (2 pieces) 17 Temperature sensor - R717
7 Pressure switch for Fan 18 Restrictor, purge line
8 Reciever 19 MCX 15 Pre-programmed
9 Filter 20 PSU, 24V
10 Sigth glass 900 gram (31.7 oz) R452A
Fig. 1 - Purger R452A lay-out
1
2
3
4
5
7
8
9
10
11
14
15
16
17 18
13
12
14
6
19 20

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
6 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Working cycle The Danfoss IPS 8 operates in 24-hour cycles, of
which 45 minutes are dedicated to a R452A pull
down. At power on, the pull down is initiated
immediately. If no NC gases are detected during
the 45 minute pull down, the system will close
the solenoid valve at purge point 1 and open the
solenoid valve at point 2. After a cycle time of 24
hours/N (Number of purge points), the
compressor will pull down again condensing the
ammonia. After 24 hours all purge points has
been vented one time.
To identify NC gases, the controller utilizes
upper and lower thresholds for R452A
evaporating temperature. If, during pull down,
the temperature continues decreasing and the
lower threshold is passed, the controller consider
this to be a high concentration of NC gases
and opens the purge solenoid valve. The purge
valve will stay open until sufficient condensing
ammonia is present to lift the R452A evaporating
temperature above the upper threshold.
The compressor will continue running and if the
temperature again decreases below the lower
threshold, a new purging will be performed. This
process will be repeated until the evaporator
temperature stays above the lower threshold
for 45 minutes after the previous closing of the
purge valve.
Fig. 2 - Power on & Cycle at no NC gases present: CST (compressor start time) and PDT (pull down time) are configurable
* Cycle (CST) = 24 hours/N (number of purge points)
Cycle (CST) *
Purger Pull down (PDT): 45 min
Cycle (CST) *
Purger Pull down (PDT): 45 min
Time
Power on Purger Pull down (PDT): 45 min
On
Off
On
Off
Compressor
Purge valve
Fig. 3 - Purging procedure - Low R452A evap. temperature detected during PDT: Tresholds are configurable
* If low evaporator temperature is detected (passing lower threshold), the purging procedure will be repeated immediately
Time
On
Off
On
Off
Compressor
Purge valve
Evaporator Temp. (Tsat452)
Upper Threshold (VClseT)
Lower Threshold (VClseT)
Non condensables has been purged
- new cycle starts *

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 7
Air traps
2
1
a
b
3
4
y
x
2
1
a
b3
4
y
x
Fig. 4 Liquid level. Bottom connected receiver Fig. 5 Liquid level. Top connected receiver
For systems with low pressure liquid level control,
the proper installation of the condenser/ receiver
is as shown in fig. 4 and 5.
The discharge gas from the compressor (1) is
led to the condenser (2) where it is condensed.
The receiver (3) holds the liquid until there is a
demand for liquid from the LP side, e.g., until the
expansion valve (4) opens. If the expansion valve
is closed, the liquid condensed in the condenser
will need to be stored in the receiver and the
level will increase. To secure a free flow to the
receiver, the gas must be allowed to leave the
receiver; this process is accomplished through
the pressure equalizing line (a). The pressure
equalizing line makes the pressure in the receiver
the same as in the compressor discharge line.
The pressure in the condenser outlet is lower
due to the pressure loss in the condenser. Since
the pressure is lower than in the receiver, it is
necessary to mount the condenser higher than
the receiver and allow for a higher liquid level
in the piping between the condenser and the
receiver (b).
This liquid column in the line (b) compensates for
the pressure difference.
Fig. 4 shows the connection to the bottom of the
receiver.
If the liquid from the condenser is connected to
the top of the receiver (fig. 5), a slightly different
arrangement must be made.
The liquid line (b) from the condenser to the
receiver will need to have a goose neck/liquid
trap to secure the additional liquid column to be
established.
While air is heavier than ammonia gas, the air will
collect in two locations in this type of installation:
On top of the liquid in the receiver (x) or on top
of the liquid in the drop leg from the condenser
(y).
Liquid level
dP cond
Liquid level
dP cond

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
8 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Connection locations
The correct locations for the air purger to be
connected to the ammonia plant are:
(See fig. 6 and 7)
- on top of the receiver or
- on top of the liquid in the drop leg from the
condenser.
The air purger (5) is connected to the two purge
points through solenoid valves (px and py).
Note that only one solenoid should be open at
any given time. Otherwise the liquid column in
the condenser will be short-circuited.
The air purger must have its own liquid return
drop leg (c) connected in parallel with the
condenser’s drop legs (b).
When the purger is connected to the receiver,
the liquid level in the air purgers drop leg (c)
will be equal to the receiver level (3); when it is
connected to the condenser outlet, the level will
be equal to the level in the condenser drop leg (b).
Fig. 6 Purger connections (px) & (py). Drain piping (c) must be vertical/downward slope
2
1
a
b
3
4
5
py
c
px
Danfoss
IPS 8
Air purger installation in a low-pressure liquid level controlled installation
Alternatively, the air purger draining of liquid can
be done through an HP float valve (6) to the low
pressure side (see fig. 7).
Fig. 7 Purger connections (px) & (py). Drain piping (c) must be vertical/downward slope
2
1
a
b
3
4
5
py
c
px
6
Danfoss
IPS 8
Liquid level
Low pressure side
Liquid level

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 9
Connection locations
(continued) For systems with a high-pressure liquid level
control, the air will collect in the float valve (3).
(See fig. 8).
For this reason, all float valves have been fitted
with a small bypass to avoid the air affecting the
function of the float valve. The compressor (1)
supplies high-pressure gas to the condenser (2),
where it is condensed.
The float valve (3) will flash any liquid back to
the LP side. The air purger (5) must be connected
to the float valve through a solenoid valve (pv).
The ammonia liquid condensed in the air purger
must be drained through drain pipe (c) to the LP
side through a float valve (6).
Air purger installation in a high-pressure liquid level controlled installation
The air purger must always be mounted
above the highest liquid level to be able
to drain the ammonia condensed in it.
Otherwise, the air purger will be flooded
and it can potentially purge ammonia
liquid.
The purger liquid return legs (c) must
always be vertical or with a downward
slope. Never let drain liquid flow
upwards.
The solenoid valves at the connection
points must never be activated at the
same time. Finalize purging at one
location before switching to the next.
General
Fig. 8 Purger connections (pv). Drain Piping (c) must be vertical/downward slope
2
1
3
5
6
c
pv
Danfoss
IPS 8
Follow the installation guide strictly during Purger installation.
Install the Purger unit in a location where the bottom flange level
and any gas inlet connection level is above any possible ammonia
liquid level.
Liquid drain piping from the purger must always have a downward
slope.
Install a shut off valve close to the bottom flange entrance to
enable removal of the unit and closing for high pressure ammonia
gas.
Connect proper resistant piping to the purging outlet pipe and
make sure the purged non-condensables is discharged into a water
bath of max. 200 liter.
Cod. 99000572
WARNING !
Low pressure side

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
10 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Connection points
Single point purging is the basic setup in the
Danfoss IPS 8 unit.
The installation should be done as shown in
fig. 9 on top of the receiver or a float valve. (See
connection locations).
The supply and drainage are mechanically
controlled, with no special configuration in the
purger control required.
The purger unit is able to handle up to 8 purge
points in total (see fig. 10).
Separate control of the supply solenoids must be
setup.
This control should be based on a timer and must
be established at site.
N = number of purge points
The solenoid activation control must activate/
deactivate each individual solenoid in a sequence
of 24/N hour (example 3 purge points – 24/3 = 8
hour).
Single point or multi-point purging
NEVER HAVE MORE THAN 1 POINT OPEN AT A
TIME.
Always close one valve before opening the
next.
The integrated Danfoss purger control needs
to be adapted to the actual number of purging
points during configuration.
This is done by activating the multipurger
(label y02) and entering the number of actual
purge points in the program. See section
“Programming/configuration”.
Please contact Danfoss for instructions on multi-
point purging activation.
Fig. 9 Single point purging from receiver Fig. 10 Multi-point purging from up to 8 purging points
Purge Points
- up to 8 points
ICF 15-4
Be aware of liquid traps
NH₃ gas + NC gases
SVA
SNV
Make slope
shown above
Liquid drain to Low
pressure side
Receiver
Ammonia Liquid
Ammonia Liquid
Ammonia gas + NC gases
NH₃ bypass for draining purger
SVA
SNV
SNV
SV3
SVA

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 11
Installation The Danfoss IPS 8 should be installed in
accordance with locations recommended in the
Connection locations and Connection points
sections.
The unit is IP55 and can be installed outside,
where it will operate from -10 °C to 43 °C
14 °F to 109 °F) ambient temperature.
Avoid installation in direct sunlight as this
might cause too high ambient temperature.
For ambient temperatures below -10 °C (14 °F)
the air purger shall be installed in a heated and
ventilated area. The unit shall be installed in a
non-ATEX atmosphere as the purger unit is not
explosion proof
The purger unit should be kept in an upright
position all the way from receipt to final
installation.
Use all 4 lifting eyes and appropriate lifting gear
during installation (unit weight 100 kg/220 lbs).
Install the unit on a horizontal construction 0.05
to 1.1 meter (2 to 43 in) above a service
platform with sufficient support and allowing the
purger subframe to be bolted to the support
(see example in fig. 12). Maintain recommended
distances in all directions (fig. 12) to allow fan
cooling and service.
Allways leave the unit 12 hours from finished
installation before first time switching on
It is important that the support
construction is level to ensure the
internal liquid trap is properly filled.
Angle to horizontal < 2 degrees
Fig. 11
Fig. 12 Installation dimensions
*
Flange for R717 access
Support for 100 kg/ 220 lbs
Service platform
*
Flange for R717 access
Support for 100 kg/ 220 lbs
Service platform
Use all 4 lifting eyes and appropriate
lifting gear for lifting the purger unit
* For easy access to the main switch
and servicing, the Purger unit shall be
installed between 0,05 to 1,1 m (2 to 43 in)
above service platform level.
Min. 900 mm 1051 mm Min. 500 mm
32 mm
446 mm
Min. 300 mm Min. 900 mm
Min. 300 mm
703

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12 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Installation (continued)
Fig. 13 Ammonia connection
Fig. 14 Enclosed weld flange
Prepare the ammonia pipe work with the weld
flange according to fig. 13 and 14. The main/
drain piping should never be smaller than inner
diameter Ø37 mm (1.5 in).
Establish the support construction able to carry
100 kg (221 lbs).
Lift the purger into position using the lifting eyes
on each side of the cabinet.
Remove the rubber plug from the flange opening.
Connect the weld flange with the purger flange
using the enclosed flat gasket and tighten the 4
bolts diagonally to a torque of 60 Nm (44.3 ft-lb).
Insert 4 bolts through the purger frame and the
support construction and tighten.
Perform a leak test to ensure tight connection.
In case the purger unit needs to be dismantled
please contact Danfoss for instructions.
Establish a proper pipe/hose from the purge
solenoid valve for blow-off of NC gases according
to local or national regulations.
Note: Prior to replacing the water in the
water tank it must be secured that the
purger is switched off and the shut off
valve at the flanged purger inlet is closed.
Leave the unit in this condition for a
period to allow the remaining gas in the
piping to be dissolved/escaped.
Watch out for bubbles.
Establish a procedure for regular check of
Ph and bubble pattern.
If continuous bubbles are observed in
the water tank during‘‘stand by” (Green
light indicator) in normal operation the
purge solenoid valve needs repair or
replacement.
Prepare an outside water tank with a maximum
of 200 liters (53 gal.) and make sure the piping
allows the purged gas to be immersed in the
water.
Regularly check the Ph value of the tank’s
contents.
The Ph value should never exceed 12.6 else the
content must be renewed.
Dispose of highly concentrated waste water
according to local/national regulations.
120°
Ø43
Ø37
82
57
57
4 x Ø14
82
Ø22
57
57
Enclosed gasket
Flange for NH₃ connection. Remove rubber plug
Enclosed bolts, Torque: 60 Nm
(44.3 ft lb) diagonal tension
Purging pipe OD 17.2 for rubber hose to water bath
Do not unscrew restrictor inside pipe.
Risk of purging high NH₃ concentration
Enclosed weld flange (fig. 14)
547
8 x 11 mm (hole) 274
416,4
198
310
155

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
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Electrical wiring The internal wiring of the purger is done at the
factory. Only the electrical wiring for the main
power supply, the purge point solenoids and
optional bus communication must be done on site.
Controller box cover can only be opened at key unlock and main switch off.
Note: Authorized personel only
Fig. 15 Controller box external
Fig. 16 Controller box internal
It is recommended to protect all external cables
from the IPS 8 to the power supply and to all
purge point solenoids by metallic pipes.
Electrical
hazards.
Authorized
personnel only.
WARNING
ON/OFF Switch
STANDBY RUN ERROR
PURGING
Key Lock
COM
AI1 AI2
ANALOG INPIT 1-6
COM
AI7 AI8 AI9 AI10
5V+
ANALOG INPUT 7-10
DI 2H
DI 2
COM
DIGITAL INPUT 2
CAN
CAN RJ
MCX
DI 3H
DI 3
COM
DIGITAL INPUT 3
DI 4H
DI 4
COM
DIGITAL INPUT 4
AO5
COM
ANALOG OUTPUT 5-6DIGITAL OUTPUT 15
AI3
5V+
12V+
5V+
AI4 AI5
L N
POWER
DI 17 DI 18
COM
COM
DIGITAL INPUT 17-18
DI 13
DI 14 DI 16
COM
DIGITAL INPUT 13-16
DI 15
DI 9
DI 10 DI 12
COM
DIGITAL INPUT 9-12
DI 11
DI 5
DI 6 DI 8
COM
DIGITAL INPUT 5-8
DI 7
AO6
COM
DI 1
D1 H
DIGITAL INPUT 1DIGITAL OUTPUT 14
NO 14
COM
NC 14
NO 15
COM
NC 15
AI6
COM
MCX15B Controller
Up to 8 purge valves
Optional 24V DC
power supply for (8)
purge solenoids
(not included)
MCX15B Controller
On/Off
Main Switch
Main Power
230V 50 Hz
L
Compressor relay24V Converter
Compressor/condenser
fan On/Off
Purge valve
Earth
N
Solenoid valves
On/Off

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Electrical wiring
(continued)
Fig. 17 Power Supply
*By useof GD2 24V DC remove 1-2 and 3-4 bridges between the terminals and connect power supply
Fig. 18 Controller MCX15B Inputs and Outputs
L/1
N/1
L
N
L/3
L/4 L/5
9 8
L/2
Compressor
M1 M2 VR1
1 1 1
Press.
Switch
Extraction
air fan Crankcase heater
24V DC 0V DC
Power supply
MCX15B Power supply Solenoid valves*
Condenser
Fan
230V AC
QS1
QM1 QM2
GD1 GD2
QM3
KL1 KL1
TR
RC
NO1
C 1
NO2
C 2
NO3
C 3
NO4
C 4
NO5
C 5
N1 L1 NO
6
C 6
NO7
C 7
NO8
C 8
NO9
C 9
NC15
C 15
NO15 NC14
C 14
NO14
NC13
C 13
NO13
NC
12
C 12
NO12
NC11
C 11
NO
11
NC10
C 10
NO
10
9
8
12 3
4
5 6 7
10 11 12 13 14 17 18 15 16
Solenoid valve System running System running System error
Solenoid valve Solenoid valve Solenoid valve Solenoid valve Solenoid valve Solenoid valve Solenoid valve Solenoid valve Solenoid valve
24V DC
0V DC
MCX15B OUTPUT

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 15
Fig. 20
Lights ON Status Compressor
ON
Compressor
OFF
Purge Valve
ON
Purge Valve
OFF Alarm
Green Stand by x x
Yellow Run x x
Green & Yellow Purging x x
Green & Yellow
& Red
Uninterupted Long time
purging (> 150 h) x x*
Red Occurs when: Check list
of alarms description (x**) x** x
* The purger continuous purging until max running period (default 160 h) is reached and the purger compressor will stop
** The purger compressor stops when alarm occurs
Electrical wiring
(continued)
Fig. 19 Controller MCX15B Inputs
Light Indicators
21 22 23 19 20
5V+
DI COM
DI1
COM
DI1H
DI
5
DI
6
DI7 DI8
12V+
AI
4
AI
1
AI2
AO1 AO2 AO3
D + GND D - CAN H R120 CAN L
CAN GND
CAN H
ID
CAN L
CAN GND
DI9
DI10 DI11
DI12
DI13 DI14 DI15 DI16
COM DI17 DI18 DI
2
DI
2H
DI
3
DI3H
DI COM
DI4 DI4H
DI COM
D + GND D -
AO4
L1 N 1
AI5 AI6
COM
AO5
COM
AO
6
COM
COM
AI7 AI8 AI9 AI10
5V+
AI3
COM
DI COM
COM
COM
5V+
24 25
26
Compressor
relay
24V DC 24V DC
0V DC 0V DC
XT1
Discharge
Temp. sensor
MCX15B INPUT
Suction
Temp. sensor
R717
Temp.
sensor
Low
pressure
sensor
High
pressure
sensor
STANDBY RUN ERROR
PURGING
Green
light
Yellow
light
Red
light
ON/OFF Switch
Key Lock
KL1
BPL
ST1 ST2 ST3
BPH

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
16 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Display After switching on the controller, a display
window will momentarily show the actual
software version, followed by the default main
operating window shown in fig. 21.
While in operation mode, the Up/Down arrows
lead to the status windows mentioned in the
table below.
Fig. 21 - Default main window. Operating (start) mode. (Examples only)
Purge Point percentage Distribution of the actual purging on the various purge points
Dis. temp. Actual R452A discharge temperature (°C)
Main Window default See above
Cycle info Acc. time Purge valve open (h)
Past events Last 7 purging events (min)
Standby Run (Pull down)
Purging
Esc.
Up
Down Enter
R717 low Pres limit
Actual R717 Pres
Actual R452A Pres
Upper
Threshold for Purge Valve
Lo
wer Threshold for Purge Valve
Actual R452A Temp
Not
Used
P717On _bar
Psat717_bar
Psat452_bar
VClseT _°C
VOpenT _°C
Tsat452_°C
P717On6.5 bar
Psat7179.0 bar
Psat4528.7 bar
VClseT 45.0 °C
VOpenT 50.0 °C
Tsat45211.9 °C
P717On
Psat717
Psat452
VClseT
VOpenT
Tsat452
6.5
9.0
1.3
45.0
50.0
-39.9
bar
bar
bar
°C
°C
°C
VClseT
VOpenT
Tsat452
6.5
9.0
0.7
45.0
50.0
-52.6
bar
bar
bar
°C
°C
°C
Alarm present
P717On
Psat717
Psat452
VClseT
VOpenT
Tsat452
6.5 bar
9.0 bar
0.1 bar
45.0 °C
50.0 °C
-83.9 °C
Psat717
Psat452
P717On

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 17
Programming/Configuration By pressing the main menu will show up with below options
Main Menu Submenu Submenu/status Submenu/status Min Max Default Description Label
Alarms
Active alarms
No alarm
up to 15 alarms
(see table
below)
Up to 15 possible alarms listed by arrow up/down
Reset alarms Reset all actual alarms
Log history View log history
Clear log
history Clear log history
Login Password *** 200 N/A
Start Turn On Main swith ON
Turn Off Main swith OFF
Parameters Unit config
Compressor
0 sec 100 sec 20 sec SDT (Compressor start delay) CM2
5 min 2000
min 45 min PDT (Pull down time) CM3
180 min 2000
min
1440
min CST (Cycle time) CM4
24 hours 768
hours
160
hours PLT (Endless purging max time) VA5
Limits settings
0 bar 5 bar 0.5 bar Comp Diff (Hysteresis min allowed ammonia pressure) CM5
0 bar 12 bar 6.5 bar Setpoint (Min allowed ammonia pressure) CM1
Input/Output Input / Output Display & Config
All alarms except (*) activates red light on box outside
For alarms not resettable and/or cause not identified please contact Danfoss
Occurring active alarms, possible reasons and recommended action
Code Modbus address Alarm Description Possible reason Recommended action
A01 1901 .08 General alarm Adjustable external alarm (default not
used) Fault in system connected to the DIO4 Contact contractor
E01 1901 .09 Temp. Sensor Fault Electrical failure to R452A Temp. sensor Cut wire Repair the wiring
E02 1901 .10 BPL Sensor Fault Electrical failure to Ammonia Pressure
sensor Cut wire Repair the wiring
E03 1901 .11 BPH Sensor Fault Electrical failure to R452A Pressure
sensor Cut wire Repair the wiring
E04 1901 .12 Low temperature R452A Temp. too low Low ambient temperature Wait for higher ambient temp. or move
IPS to a place with high ambient temp..
E05 1901 .13 Hi temperature R452A Temp. too high Hi ambient temperature Wait for lower ambient temp. or move
IPS to a place with lower ambient temp.
E06 1901 .14 Low pressure BPL Ammonia Pressure too low Closed stop valve Open inlet stop valve
E07 1901 .15 Hi pressure BPL Ammonia Pressure too high Ammonia system pressure too high Wait for lower pressure
E08 1901 .00 Low pressure BPH R452A Pressure too low Low R452A charge Find and repair leak, evacuate and
recharge with R452A
E09 1901 .01 Hi pressure BPH R452A Pressure too high Ammonia system pressure too high Wait for lower pressure
E10 1901 .02 System is OFF System is Off (*) Main switch is OFF Switch ON the main switch
E11 1901 .03 Memory is full Memory is full Memory is full from long time operation Clean the memory in the MCX
E12 1901 .04 Total purge time error Total purge time exceeded Restrictor is plugged Replace the restrictor
E13 1901 .05 Compressor error No feedback from KL1 relay Wiring from MCX is cut Repair the wiring
Code Possible reason Recommended action Possible reason Recommended action Possible reason Recommended action
E01 Faulty sensor Replace sensor Measurement out of range Check actual pressure.
Replace sensor if needed
E02 Faulty sensor Replace sensor Measurement out of range Check actual pressure.
Replace sensor if needed
E03 Faulty sensor Replace sensor Measurement out of range Check actual pressure.
Replace sensor if needed
E05 Low R452A charge Find and repair leak, evacuate
and recharge with R452A
E06 Rubber plug in flange not
removed Remove rubber plug
E08 Expansion valve may be
clogged or have lost charge Replace expansion valve
E09 Expansion valve may be
clogged or have lost charge Replace expansion valve Condenser fan is not running properly
Clean or Replace fan or
fan motor
Air in the R452A
circuit
Empty vacuum and
recharge R452A
E12 Large hole in ammonia
system Isolate the hole and close it

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
18 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Bus and Map
Label Description Value Unit Decimals Level R/W Mode Enumeration Modbus Address (ADU)
GENERAL > SETUP
y01 ON/OFF 1 = ON 0 0 R/W OFF;ON 3001
y02 Activate Multipurger 0 = NO 0 3* R/W NO;YES 3002
UNIT CONFIG > COMPRESSOR
CM3 PDT 45 min 0 0 R/W 3015
CM4 CST 1440 min 0 0 R/W 3016
VA5 PLT 160 h 0 0 R/W 3017
UNIT CONFIG > LIMITS SETTINGS
CM5 Comp Diff 0,5 1 0 R/W 3033
CM1 Setpoint 6,5 bar 1 0 R/W 3034
STATUS VAR > MCX DESIGN
HOTSPOTS
C01 Reset Alarms 0 0 0 R/W 1859
V02 SystemOnOff 0 0 0 Read 8101
V03 ValveStatus 0 0 0 Read 8102
V04 CompressorStatus 0 0 0 R/W 8103
V05 ALARActive 0 0 0 Read 8104
V06 PressTotemp 0 1 0 Read 8105
V07 ValveCount 0 0 0 Read 8106
V08 ComprTime 0 0 0 Read 8108
V09 COmprStartAfter 0 0 0 Read 8110
V10 ResetMem 0 0 0 R/W 9901
V11 ValveHour 0 1 0 Read 8112
V12 StatusKL 0 0 0 Read 8114
V13 WaringCompr 0 0 0 Read 8115
V14 ValveSetpoint 0 0 0 Read 8116
V15 ValveClose 0 0 0 Read 8117
V16 Event1 0 1 0 Read 8119
V17 Event2 0 1 0 Read 8120
V18 Event3 0 1 0 Read 8121
V19 Event4 0 1 0 Read 8122
V20 Event5 0 1 0 Read 8123
V21 Event6 0 1 0 Read 8124
V22 Event7 0 1 0 Read 8125
V23 PP1 0 0 0 Read 8126
V24 PP2 0 0 0 Read 8128
V25 PP3 0 0 0 Read 8130
V26 PP4 0 0 0 Read 8132
V27 PP5 0 0 0 Read 8134
V28 PP6 0 0 0 Read 8136
V29 PP7 0 0 0 Read 8138
V30 PP8 0 0 0 Read 8140
V31 Val1 0 0 0 Read 8142
V32 Val2 0 0 0 Read 8143
V33 Val3 0 0 0 Read 8144
V34 Val4 0 0 0 Read 8145
V35 Val5 0 0 0 Read 8146
V36 Val6 0 0 0 Read 8147
V37 Val7 0 0 0 Read 8148
V38 Val8 0 0 0 Read 8149
V39 RangedVal 0 0 0 Read 8150
Programming/Configuration
(continued)
Level legend: 0 = Read view, 2 = Installer view (code 200) 3 = Danfoss Service view (Contact Danfoss)

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
© Danfoss | DCS (ms) | 2019.06 BC306932151284en-000101 | 19
Maintenance/Service/
Disposal
Maintenance minimum once per year
1 Use P&I dagram and check that all powered components is working properly
2 Check for alarms in the MCX controller
3 Fans and fins shall be cleaned for dirt and dust
4 Expansion valve shall be inspected and shall be replaced if damaged
5 Ensure expansion valves sensor bulb has good contact with suction line
6 Replace water in water bubble bath. Check Ph level frequently and replace when Ph > 12.6
7 Check cover is mounted correctly and all bolts are tightened
8 Check and verify the amperage of the unit
9 Check for compressor noices in normal operating conditions (may indicate loos bolts, worn bearings or pistons)
Procedure to isolate IPS for service
Multipoint Single point
1
Close the individual supply of gas line(s) from the ammonia
system.
Do not close any stop valve between IPS 8 and float valve
Restart the controller to force pump down
2 Restart the controller to force pump down Wait 10 – 20 minutes
3 Wait 10 – 20 minutes Close the stop valve in the ammonia drain line under the IPS 8
4 Stop the compressor by switching of the compressor fuse Stop the compressor by switching of the compressor fuse
5 Close the stop valve in the ammonia drain line under the IPS 8 Close the stop valve in the ammonia drain line under the IPS 8
6
Relief the remaining system pressure down to ambient pressure
by opening the AKVA using a permanent magnet or a possible
SNV purge valve mounted in the inlet line (see fig.10)
Relief the remaining system pressure down to ambient pressure
by opening the AKVA using a permanent magnet or a possible
SNV purge valve mounted in the inlet line (see fig.10)
Disposal of the IPS 8
If an IPS 8 unit is worn out and has to be replaced
the disposal must be done in accordance with
national legislation and only done by competent
personnel.

User Guide |Intelligent Purger System (IPS 8) for Ammonia - Technical data, installation and use
20 | BC306932151284en-000101 © Danfoss | DCS (ms) | 2019.06
Technical data
Ordering Unit Code number
Danfoss Intelligent Purger System IPS 8 unit 084H5001
Supply voltage 230V AC, 1ph, 50Hz
Current 5.7 A (max. 6.5 A)
Power consumption max. 1.3 kW
Short-circuit current rating Icc 10kA
Temperature range ambient -10 °C to +43 °C (14 °F to 109 °F)
Temperature range transport/storage -30 °C to +60 °C (-22 °F to 140 °F)
Enclosure IP55
Weight max. 100 kg (221 lbs)
Dimensions (LxWxH) 1051 x 441 x 703 mm (41.4 x 17.4 x 27.7 inches)
Purger refrigerant R452A 900 gram (31.7 oz)
Max. operating pressure (PS) R452A 28 bar (406 psi)
System refrigerant R717
Min. operating pressure R717 6.5 bar (94 psi)
Max. operating pressure R717 40 bar (580 psi)
Operating temperature R717 -40 °C to +60 °C (-40 °F to 140 °F)
Accessories/Spare parts Accessory Spare part Code
Flange blind blank incl Bolts, nuts and Gaskets* x 084H5053
SV3 Float Valve x 027B2023
ICF 15-4 solenoid, DIN x 027L4543
ICF 15-4 solenoid, ANSI x 027L4538
Welding Flange incl Bolts, nuts and Gaskets x 084H5055
Purger solenoid kit (Armature, tube, Sealing, Orifice, Filter insert) x 084H5051
Solenoid coil, 220 – 230V, 50 HZ for AKV x 018F6801
Solenoid coil, 24V for AKV x 018F6757
PSU, 24V - optional for powering purge points x 080Z0055
Restrictor, purge line x 084H5054
Compressor Cranck case heater x 084H5058
Condenser coil assy incl screws x 084H5059
Fan motor for condenser Incl fan grid and screws x 084H5060
Extraction Fan x 084H5056
Air grid with filter (2 pieces) x 084H5057
Pre-programmed MCX 15 x 084H5052
Pressure transmitter evaporator, soldered (AKS 32R) x 060G3552
Compressor including Start relay box and Start and Run Capacitor x 123F2126
Compressor Hi-temp sensor x 084N2003
Expansion valve, R452A x 068U3881
Sigth glass x 014-0191
Pressure transmitter - R717, Threaded, AKS2050 x 060G5750
Thermostat for crankcase heater control x 060L111166
Temperature sensor - R717, AKS 21M x 084N2003
Pressure switch for Fan x Contact Danfoss
Pressure safety switch x Contact Danfoss
* For closing system flange during system pressure testing