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User Guide 

|

 Intelligent Purging System (IPS 8) for Ammonia - Technical data, installation and use

22 | BC306932151284en-000201

© Danfoss | DCS (ms) | 2020.01

Register Parameter Name

Description

User 

Level

Min Value

Max Value

Default 

Value

Unit/

Type

Read/

Write

Modbus 

Function 

Code

Modbus 

Data Type

Persistent 

Yes/No

 

UNIT CONFIG > 

LIMITS SETTINGS

 

 

 

 

 

 

 

 

 

 

3027

Advanced  Setting - 
TempSensMin

Recommend default 
setting only  - Limit for 
min temperature

3

-100,0

130,0

-50

°C

R/W

3/6

Short

Yes

3028

Advanced  Setting - 
TempSensMax

Recommend default 
setting only  - Limit for 
max temperature

3

-100,0

130,0

120

°C

R/W

3/6

Short

Yes

3029

Advanced  Setting - 
BPLMin

Recommend default 
setting only  - Limit for 
min pressure (ref )

3

-1,0

25,0

0.1

bar

R/W

3/6

Short

Yes

3030

Advanced  Setting - 
BPLMax

Recommend default 
setting only  - Limit for 
max pressure (ref )

3

-1,0

25,0

24

bar

R/W

3/6

Short

Yes

3031

Advanced  Setting - 
BPHMin

Recommend default 
setting only  - Limit 
for min pressure 
(ammonia)

3

-1,0

59,0

1

bar

R/W

3/6

Short

Yes

3032

Advanced  Setting - 
BPHMax

Recommend default 
setting only  - Limit 
for max pressure  
(ammonia)

3

-1,0

59,0

24

bar

R/W

3/6

Short

Yes

3033

Comp Diff

Differential pressure - 
start/stop

3

0,0

5,0

0.5

bar

R/W

3/6

Short

Yes

3034

Setpoint

Pressure threshhold 
for compressor

2

0,0

12,0

6.5

bar

R/W

3/6

Short

Yes

3035

Tsh

Setpoint for superheat

2

5,0

40,0

15

°C

R/W

3/6

Short

Yes

 

UNIT CONFIG > 

MANUAL START

 

 

 

 

 

 

 

 

 

 

3036

Advanced  Setting - 
Man Start

Recommend default 
setting only  - This 
engages 14 relays 
on the unit - only for 
factory
0: NO  
1: YES

3

0

1

0

Enum 2

R/W

3/6

Short

Yes

 

STATUS VAR > MCX 

DESIGN HOTSPOTS

 

 

 

 

 

 

 

 

 

 

1859

Reset Alarms

Reset alarm

0

0

2

0

N/A

R/W

3/6

Short

Yes

8101

SystemOnOff

Feedback from the 
main switch

0

-32768

32767

0

Enum 1

Read 

only

3

Short

No

8102

ValveStatus

Feedback from the 
purge valve - open/
closed

0

-32768

32767

0

Enum 1

Read 

only

3

Short

No

8103

CompressorStatus

Feedback from the 
compressor - on/off

0

-32768

32767

0

Enum 1

R/W

3/6

Short

Yes

8104

ALARActive

Any alarm active 
indicator

0

-32768

32767

0

Enum 2

Read 

only

3

Short

No

8105

PressTotemp

Suction temperature 
(calculated from 
pressure on suction)

0

-327,7

327,7

0

°C

Read 

only

3

Short

No

8106

ValveCount

The amount of purge 
valve activations

0

-2147483648

2147483647

0

N/A

Read 

only

3

Long

No

8108

ComprTime

Remaining time for 
compressor pull-down 
for the actual purge 
pointr cycle

0

-2147483648

2147483647

0

Minutes

Read 

only

3

Long

No

8110

COmprStartAfter

The delay between 
the purging cycles

0

-2147483648

2147483647

0

Minutes

Read 

only

3

Long

No

9901

Advanced  Setting - 
ResetMem

Recommend default 
setting only - All 
logged values are 
reset
0: NO 
1: YES

0

0

1

0

Enum 2

R/W

3/6

Short

Yes

8112

ValveHour

The amount of hours 
that the main purge 
valve has been active

0

-214748364,8 214748364,7

0

Hours

Read 

only

3

Long

No

8114

StatusKL

Status of KL01 relay 
(compressor and 
crankcase heater)

0

-32768

32767

0

Enum 2

Read 

only

3

Short

No

8115

WaringCompr

Indicates problem 
with compressor 
status

0

-32768

32767

0

Enum 2

Read 

only

3

Short

No

Summary of Contents for IPS 8

Page 1: ...ir danfoss com 148R9645 User Guide Intelligent Purging System IPS 8 for Ammonia Technical data installation and use ir danfoss com 148R9645...

Page 2: ...1 Legal notice 3 Technical data 4 Ordering 4 Introduction 5 Features 5 Working principle 6 Working cycle 7 Air traps 8 Connection locations 9 Connection points 11 Installation 12 Electrical wiring 14...

Page 3: ...ng 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 declaratio...

Page 4: ...rogrammed 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...

Page 5: ...through e g a water bath Through the flanged opening the purger unit has access to the parameters from the ammonia plant required for full electronic control The unit runs automatically in 24 hour cy...

Page 6: ...ough a continuous process As the NC gas concentration in the heat exchanger 12 increases the R452A heat exchanger pressure and temperature will simultaneously decrease The controller continuously moni...

Page 7: ...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 tempe...

Page 8: ...ualizing 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 condense...

Page 9: ...st 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 i e solenoid px open the liquid level in the air purgers dr...

Page 10: ...condensed in it Otherwise the air purger can flood and potentially purge ammonia liquid The purger liquid return leg c must always be mounted vertically or at minimum with a downward slope The soleno...

Page 11: ...s connected needs to be setup in the MCX controller after power up Both power and control wiring of the installed solenoid valves coils should take place prior to first power up Multi point purging NE...

Page 12: ...ing eyes and suitable lifting gear during installation unit weight 100 kg 220 lbs Install the unit on an even horizontal base 0 05 to 1 1 meter 2 to 43 in above a service platform with sufficient supp...

Page 13: ...with local or national regulations Note Prior to replacing the water in the water tank ensure that the purger is switched off and the shut off valve at the flanged purger inlet is closed Leave the un...

Page 14: ...cal 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...

Page 15: ...tion 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 NO 1 C 1 NO 2 C 2 NO 3 C 3 NO 4 C 4 NO 5 C 5 N 1...

Page 16: ...when alarm occurs Electrical wiring continued Fig 19 Controller MCX15B Inputs Light Indicators 21 22 23 19 20 5V DI COM DI 1 COM DI 1H DI 5 DI 6 DI 7 DI 8 12V AI 4 AI 1 AI 2 AO 1 AO 2 AO 3 D GND D CAN...

Page 17: ...Enter R717 low Pres limit Actual R717 Pres Actual R452A Pres Upper Threshold for Purge Valve Lower Threshold for Purge Valve Actual R452A Temp Compressor on Not Used P717On _ bar Psat717 _ bar Psat45...

Page 18: ...sted 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 P...

Page 19: ...ent of the R717 line is out of range Compare pressure with another pressure reading and replace pressure transmitter if needed E04 Low temperature Indicates too low ambient temperature 10 C Too low am...

Page 20: ...dbus Function Code Modbus Data Type Persistent Yes No GENERAL SETUP 3001 ON OFF 0 Main switch off 1 Main switch on 2 0 1 1 Enum 1 RW 3 6 Short Yes 3002 Activate Multipurger Switch on off multipurging...

Page 21: ...ging unit 0 NO 1 R12 2 R22 3 R134a 4 R502 5 R717 6 R13 7 R131b1 8 R23 9 R500 10 R503 11 R114 12 R142b 13 Invalid 14 R32 15 R227ea 16 R401A 17 R507A 18 R402A 19 R404A 20 R407C 21 R407A 22 R407B 23 R410...

Page 22: ...tting Man Start Recommend default setting only This engages 14 relays on the unit only for factory 0 NO 1 YES 3 0 1 0 Enum 2 R W 3 6 Short Yes STATUS VAR MCX DESIGN HOTSPOTS 1859 Reset Alarms Reset al...

Page 23: ...6 7 0 Minutes Read only 3 Long No 8129 Event6 Purge cycle event counts the accumative minutes that the purge valve has been open on a finished cycle 0 3276 8 3276 7 0 Minutes Read only 3 Long No 8131...

Page 24: ...I3 Leads to shut down of IPS 8 0 0 1 0 AUTO R Read only 3 Long No 1901 09 Temp Sensor Fault Indicates no signal from temperature R452A sensor 0 0 1 0 AUTO R Read only 3 Long No 1901 10 BPL Sensor Faul...

Page 25: ...N A N A N A 1012 Not used N A 0 100 N A NO Read only N A N A N A 1013 Not used N A 0 100 N A NO Read only N A N A N A 1014 Not used N A 0 100 N A NO Read only N A N A N A DIGITAL INPUTS 1001 08 Status...

Page 26: ...purge valve relay 2 0 1 N A N O Read only 3 Long No 1003 10 Green Status LED 2 0 1 N A N O Read only 3 Long No 1003 11 Yellow Status LED 2 0 1 N A N O Read only 3 Long No 1003 12 DO_Red Status LED 2 0...

Page 27: ...Multipoint Single point purging from receiver 1 Close all supply lines from the purge points of the ammonia system Do not close any stop valve between IPS 8 and float valve Restart the controller to f...

Page 28: ...28 BC306932151284en 000201 Danfoss DCS ms 2020 01...

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