Danfoss MCX08M User Manual

DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
2
Danfoss Electronics spa
Air Handling seq. - user manual
Index
1| Introduction 4
2| User interface
5
2.1| Keyboard 5
2.1.1| Direct access to special functions 5
2.1.2| Menu navigation 5
2.2 Turning the unit ON and OFF 5
2.3| Main screen 6
2.3.1| LED Display 6
2.3.2| LCD Display 7
2.4| Menu-based navigation 8
2.4.1| Displaying and managing alarms 9
2.4.2| Login 9
2.4.3| Parameters 10
2.4.4| Displaying the input/output values 10
2.4.5| Utilities 11
3| Conguring the AHU software 1
3
3.1| Conguration overview 13
3.2| Input/Output conguration 14
4| Coils control 1
7
4.1| Assign a control sequence to a coil 17
4.2| Coil output management 18
4.3| Valve control 19
4.3.1| ON/OFF and 0/10V valve control 19
4.3.2| 3-point valve control 20
4.4| Step control 21
4.4.1| Linear step switch 21
4.4.2| Variable step switch 22
4.4.3| Binary step switch 23
4.5| Locking sequences 24
4.6| Pumps control 25
4.7| Single Heat/Cool coils 26
4.8| Cooling coil defrost control 27
4.9| Heat/Cool request 27
5| Dampers and Energy recovery control 2
8
5.1| External and Mixing dampers 28
5.1.1| ON/OFF dampers 29
5.1.2| 0/10V dampers 29
5.1.3| Damper locked 29
5.2| Energy recovery 30
6| Temperature control sequences 3
1
6.1| Damper control sequences 31
6.1.1| Freecooling/Freeheating selection 32
6.1.2| Minimum opening 32
6.2| Heat and cool control sequences 33
6.3| Connection of setpoint sequences 35
6.4| Main setpoint 36
6.5| Local setpoint 37
7| Cascade Control 3
8
8| Examples 3
9
8.1| Example 1 39
8.2| Example 2 40
9| Frost protection 4
2
10| Controlling the supply temperature limits 4
3
10.1| Supply temperature limits in cascade control 43
10.2| Supply temperature lower limit 43
10.3| Supply temperature upper limit 44
11| umidity control 4
5
11.1| Control sequences 46
11.2| Humidier control 46
11.3| Dehumidier control 47
11.3.1| Cooling coil in dehumidication 48
11.4| Controlling the supply humidity limits 49
11.4.1| Upper limit 50
11.4.2| Lower limit 50
12| Supply and return fans 5
1
12.1| Type of supply and return fans 51
12.2| Fan speed conguration 53
12.3| Fans and antifreeze 54
12.4| Fans lock 54
13| Air quality control 5
5
14| Alarms 5
6
14.1| Actions following an alarm 56
14.2| Types of reset 56
14.3| Alarms table 56
15| Parameters 5
9

Danfoss MCX08M Specifications

General

Brand	Danfoss
Model	MCX08M
Category	Controller
Language	English