1. RWD CONTROLLERS TECHNICAL
HVAC Products – Americas Region
RWD CONTROLLERS TECHNICAL

2. RWD82U

3. RWD82U controller RWD82U Connection Diagram
E1 Electrical load 2-position control
N1 RWD82U controller
PC Personal computer
Q1/Q2 Potential-free relay contacts for 3-position or 2-position control in 2 steps
S1 Time clock or switch
SN System neutral
SP System potential
X1 Main input (Termination G appears when X1 is an active sensor)
X2 Auxiliary input or remote setpoint (Termination G appears when X2 is an active sensor)
Y1 Actuator with 3-position control 24 Vac

4. RWD82U
Applications with corresponding selectable auxiliary function

5. Main Sequences
RWD82U

6. RWD82U - Main Sequence
2 Heating sequences or 2 Reverse Acting sequences (Dependent)
Application No.:
2 electric heaters
heating valve with heating pump

7. RWD82U - Main Sequence
2 Heating sequences or 2 Reverse Acting sequences (Independent) X1 Q1
Temp.
RWD82U On
Off Q2
Application No.:

8. RWD82U - Main Sequences
Heating sequence or Direct or Reverse Acting Sequence (3-point) X1 Q2 Q1
Temp.
RWD82U On
Off
Setpoint
Load 0%
100%
Application No.:

9. RWD82U - Main Sequence Heating + Cooling sequences
or Reverse + Direct acting sequences X1 Q2 Q1
Temp.
RWD82U On
Off
Application No.:

10. RWD82U - Main Sequence
2 Cooling sequences or 2 Direct Acting sequences (Independent) X1 Q1
Temp.
RWD82U On
Off Q2
Application No.:

11. RWD82U - Main Sequence
2 Cooling sequences or 2 Direct Acting sequences (Dependent) X1 Q1
Temp.
RWD82U On
Off Q2
Application No.:

12. RWD82U - Main Sequences
Cooling sequence or Reverse or Direct Acting sequence (3-position) X1 Q2 Q1
Temp.
RWD82U On
Off
Setpoint
Load 0%
100%
Application No.:

13. RWD62U

14. RWD62U controller Termination
N1 RWD62U controller
PC Personal computer
S1 Time clock or switch
SN System neutral
SP System potential
X1 Main input (Termination G appears when X1 is an active
sensor)
X2 Auxiliary input or remote setpoint (Termination G appears
when X2 is an active sensor)
Y1, Y2 Valve actuator 1 and 2/Damper actuator 1 and 2

15. RWD62 Applications with corresponding selectable auxiliary function
Application No. Summary
(H = Heating, C = Cooling, R =
Reverse Acting, D = Direct Acting)
(The 1st digit = Main Control Loop,
The 2nd digit = Auxiliary Control
Loop)
Main
Loop
#1x
H or D sequence
#2x
H + H or D + D
sequences
#3x
H + C or D + R
#4x
C or D sequence
#5x
C + C or D + D
Auxiliary Loop
#x0 No auxiliary
#10
#20
#30
#40
#50
#x1 Remote Setpt
#11
#21
#31
#41
#51
#x2 Absolute limiter
#12
#22
#32
#42
#52
#x3 Relative limiter
#13
#23
#33
#43
#53
#x4 Compensation shift
#14
#24
#34
#44
#54
#x5 Cascade
#15
#25
#35
#45
#55
#x6 Win/Sum digital
#16
#26
#36 -
#x7 Win/Sum analog
#17
#27
#37
#x8 Max. priority
#38
#48
#58
#x9 Main loop is using active input
#19
#29
#39
#49
#59

16. Main Sequences
RWD62U

17. Y1 RWD62 - Main Sequences Heating sequence or Direct Acting sequence
Output
Voltage
Setpoint
Load X1 Y1
Temp.
RWD62U Y
Application No.:
Output Y1 can be switched from D.A. to R.A.

18. RWD62 - Main Sequences
2 Heating sequences or 2 Direct Acting sequences Y1
Output
Voltage
Setpoint
Load Y2 Y1 Y2 X1 Y
Temp.
RWD62U
Application No.:
Outputs Y1 and Y2 can be switched from D.A. to R.A.

19. RWD62 - Main Sequences Y1 Y2 Heating + Cooling sequences
or Direct+ Reverse acting sequences Y1
Output
Voltage
Setpoint
Load Y2 X1 Y2 Y1
Temp.
RWD62U Y
Application No.:
Output Y1 can be switched to R.A. and Y2, D.A.

20. RWD62 - Main Sequences Cooling sequences or Reverse Acting sequencesX1 Y1
Temp.
RWD62U Y
Application No.:
Output Y1 can be switched to D.A.

21. RWD62 - Main Sequences
2 Cooling sequences or 2 Direct Acting sequences X1 Y2 Y1
Temp.
RWD62U Y
Application No.:
Output Y1 and Y2 can be switched to D.A.

22. RWD68U

23. RWD68U controller E1 Electrical load N1 RWD68U Controller
PC Personal computer
Q1 Potential-free relay contacts for two-position control
S1 Time clock or switch
SN System neutral
SP System potential
X1 Main input (Termination G appears when X1 is an active sensor)
X2 Auxiliary input or remote setpoint (Termination G appears when X2 is an active sensor)
Y1 Valve actuator/Damper actuator

24. RWD68U Applications with corresponding selectable auxiliary function
Application No. Summary
(H = Heating, C =
Cooling, R = Reverse
Acting, D = Direct
Acting)
(The 1st digit = Main
Control Loop, The 2nd
digit = Auxiliary Control
Loop)
Main
Loop
#1x
H or D
sequence
#2x
H+H or D+D
depend.
#3x
independ.
#4x
Dig H + ana C or
Dig R + ana D
#5x
Ana H + dig C or
ana R + dig D
#6x
C+C or D+D
depend .
#7x
independ
#8x
C or D
Auxiliary Loop
#x0 No auxiliary
#10
#20
#30
#40
#50
#60
#70
#80
#x1 Remote Setpt
#11
#21
#31
#41
#51
#61
#71
#81
#x2 Absolute limiter
#12
#22
#32
#42
#52
#62
#72
#88
#x3 Relative limiter
#13
#23
#33
#43
#53
#63
#73
#83
#x4 Compensation shift
#14
#24
#34
#44
#54
#64
#74
#84
#x5 Cascade -
#25
#35
#45
#55
#65
#75
#x6 Win/Sum digital
#16
#36
#46
#56
#x7 Win/Sum analog
#17
#37
#47
#57
#x8 Max. priority
#48
#68
#78
#x9 Main loop is using
active input
#19
#29
#39
#49
#59
#69
#79
#89

25. Main Sequences
RWD68U

26. RWD68U - Main Sequence Heating sequence or Reverse Acting sequenceX1 Q1
Temp.
RWD68U On
Off
Application No.:

27. RWD68U - Main Sequence Y1 Q1 Heating
2 Heating sequences or 2 Direct Acting sequences (Dependent) X1 Y1 Q1
Temp.
RWD68U Y Y1
Max V
Heating
Load
Setpoint
Output
Voltage Q1
OFF ON
Min V
Application No.:
Heating coil with electric heater
By-pass system with pump & 3-way valve
Output Y1 can be switched to R.A.

28. RWD68U - Main Sequence
2 Heating sequences or 2 Direct Acting sequences (Independent) Y1
Min V
Load
Setpoint
Ouptut
Voltagee
OFF ON Q1 SD 2
Max V X1 Y1 Q1
Temp.
RWD68U Y
Application No.:
Output Y1 can se switched to R.A.

29. RWD68U - Main Sequence Heating + Cooling sequences
or Reverse + Direct acting sequences Y1
Min V
Load
Setpoint
Ouptut
Voltagee
OFF ON Q1 SD 2
Max V Y1 Q1 X1 Y Q1
Temp.
RWD68U
Application No.:
Output Y1 can be switched to R.A.

30. RWD68U - Main Sequence Heating + Cooling sequences
or Reverse + Direct acting sequences X1 Y1 Q1
Temp.
RWD68U Y
Application No.:
Heating Coil and Direct Chiller
Output Y1 can be switched to D.A.

31. RWD68U - Main Sequence
2 Cooling sequences or 2 Direct Acting sequences (Dependent) X1 Y1 Q1
Temp.
RWD68U Y
Application No.:
Direct chiller
Output Y1 can be switched to D.A.

32. RWD68U - Main Sequence
2 Cooling sequences or 2 Direct Acting sequences (Independent) X1 Y1 Q1
Temp.
RWD68U Y
Application No.: 70 – 79
Output Y1 can be switched to D.A.

33. RWD68U - Main Sequence Cooling sequence or Direct Acting sequenceX1 Q1
Temp.
RWD68U On
Off
Application No.: 80 – 89
Output Y1 can be switched to D.A.

34. RWD
Auxiliary Functions

35. RWD - Auxiliary Functions
1. Remote setpoint (#_1)
A remote setpoint transmitter QAA25U (1K Ni) or K Plat), connected to X2 and configured accordingly, assumes the function of the setpoint X1 Y2 Y1
Temp.
RWD62U Y X2

36. RWD - Auxiliary Functions
2. PI Limiter (#_2 & #_3)
The limiter function with PI control enables absolute(or relative) maximum or minimum limitation of the supply air temperature (X2).
When the value drops below or exceeds the limiter setpoint, the limiter function overrides the standard control function to maintain the limiter setpoint. X1 Y2 Y1
Temp.
RWD62U Y X2

37. RWD - Auxiliary Functions
3. Setpoint Compensation (#_4)
The temperature setpoint X1 is controlled by the temperature as measured at sensor X2.
Configuration of the RWD62U defines the influence on setpoint X1.
The example shows the supply air temperature setpoint as controlled by the outside temperature. X2 Y2 Y1
Temp.
RWD62U Y X1

38. RWD - Auxiliary Functions
4. Cascade Control (#_5)
X2 - Supply air temperature sensor
You can select the PI/PI room/supply air temperature cascade control. In this case, the virtual PI room temperature controller determines the setpoint within the limiter setpoints for the PI supply air temperature controller. X1 Y2 Y1
Temp.
RWD62U Y X2

39. RWD - Auxiliary Functions
5. Summer / Winter operation (#_6 & #_7)
X2M terminals (Digital/analog)
A digital switch or anlog output between terminals X2 and M can be used to implement summer/winter changeover. X1 Y2 Y1
Temp.
RWD62U Y D1 T

40. RWD - Auxiliary Functions
5. Summer / Winter operation (#_6 & #_7) (Cont.)
Digital changeover
When the contact is closed, summer operation is selected. Output Y1 is set to Reverse Action (cooling).
When the contact is open, winter operation is selected. Output Y1 is set to Direct Action (heating).
Analog changeover
When the X2 reach over the setpoint, summer operation is selected. Output Y1 is set to Reverse Action (cooling).
When the X2 is below the setpoint, winter operation is selected. Output Y1 is set to Direct Action (heating).

41. RWD - Auxiliary Functions
6. Maximum Priority (#_8)
If the input value (0…10V) of the input X2 is greater than the calculated output of the cooling sequence, the output will use the X2 input value as output value. This is active even when the controller is working with the heating sequence. X1 Y2 Y1
Temp.
RWD62U Y X2

42. RWD - Auxiliary Functions
7. Day / Night Setpoint (For all RWD’s, independent of App. No.)
D1M potential-free contact (External time clock)
A timer contact between terminals D1 and M can be used to implement setpoint changeover for day/night operation.
When the contact is open, the setpoint for day operation is selected.
When the contact is closed, the setpoint for night operation is selected. X1 Y2 Y1
Temp.
RWD62U Y D1

43. RWD - Software tool 125-3481 Simple windows based operation
Numbered standard applications
Customize applications
Print-out of final settings
Hide selected parameters from LCD
Create your own application library based on system type or customer