Siemens Building Technologies Inc. HVAC Products RWD controllers 1 RWD CONTROLLERS TECHNICAL HVAC...

1Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD CONTROLLERS

TECHNICAL

HVAC Products – Americas Region

2Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U

3Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U controller

E1 Electrical load 2-position control N1 RWD82U controllerPCPersonal computerQ1/Q2Potential-free relay contacts for 3-position or 2-position control in 2 stepsS1 Time clock or switchSNSystem neutralSP System potentialX1 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

RWD82U Connection Diagram

4Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82UApplications with corresponding selectable auxiliary function

Application No. Summary

(H = Heating, C =Cooling, R = ReverseActing, D = DirectActing)(The 1st digit = MainControl Loop, The 2nddigit = Auxiliary ControlLoop)

MainLoop

#1xH+H or R+R

depend.

#2xH+H or R+R

independ.

#3xH or R 3-position

#4xH+C or R+D

#5xC+C or D+D

independ.

#6xC+C or D+D

depend.

#7xC or D 3-position

Auxiliary Loop#x0 No auxiliary #10 #20 #30 #40 #50 #60 #70#x1 Remote Setpt #11 #21 #31 #41 #51 #61 #71#x2 Absolute lim iter #12 #22 #32 #42 #52 #62 #72#x3 Relative lim iter #13 #23 #33 #43 #53 #63 #73#x4 Compensation shift #14 #24 #34 #44 #54 #64 #74#x5 Cascade - - #35 - - - #75#x6 Win/Sum digital - #26 #36 #46 - - -#x7 Win/Sum analog - #27 #37 #47 - - -#x8 Max. priority - - - - - - #78#x9 Main loop is usingactive input #19 #29 #39 #49 #59 #69 #79

5Siemens Building Technologies Inc.

HVAC Products

RWD controllers

Main Sequences

RWD82U

6Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main Sequence2 Heating sequences or 2 Reverse Acting sequences (Dependent)

Application No.: 10 - 19• 2 electric heaters• heating valve with heating pump

OFF

ONSD

Setpoint

Q

(SD = Switching Differential)

7Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main Sequence2 Heating sequences or 2 Reverse Acting sequences (Independent)

Application No.: 20 - 29

X1Q1

Temp.RWD82U

On

OffQ1

Q2

Q2

Q1

OFF

ON

SD SD2 2

SD

Setpoint

Q2

SD SD2 2

SD

Q

(SD = Switching Differential)

8Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main SequencesHeating sequence or Direct or Reverse Acting Sequence (3-point)

Application No.: 30 - 39

X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

SetpointLoad0%

100%

9Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main Sequence

Application No.: 40 - 49

X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

Q2

OFF

ON

SD SD2 2

SD

Setpoint

Q1

SD SD2 2

SD

Q

(SD = Switching Differential)

Heating + Cooling sequences or Reverse + Direct acting sequences

10Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main Sequence2 Cooling sequences or 2 Direct Acting sequences (Independent)

Application No.: 50 - 59

Q1

OFF

ON

SD SD2 2

SD

Setpoint

Q2

SD SD2 2

SD

Q

(SD = Switching Differential)

X1Q1

Temp.RWD82U

On

OffQ1

Q2

Q2

11Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main Sequence2 Cooling sequences or 2 Direct Acting sequences (Dependent)

Application No.: 60 - 69

X1Q1

Temp.RWD82U

On

OffQ1

Q2

Q2

OFF

ONSD

Setpoint

Q

(SD = Switching Differential)

12Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD82U - Main SequencesCooling sequence or Reverse or Direct Acting sequence (3-position)

Application No.: 70 - 79

X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

SetpointLoad0%

100%

13Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62U

14Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62U controllerTermination

N1 RWD62U controllerPC Personal computerS1 Time clock or switchSN System neutralSP System potentialX1 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

15Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62Applications 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 ControlLoop)

MainLoop

#1xH or D sequence

#2xH + H or D + D

sequences

#3xH + C or D + R

sequences

#4xC or D sequence

#5xC + C or D + D

sequencesAuxiliary 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

16Siemens Building Technologies Inc.

HVAC Products

RWD controllers

Main Sequences

RWD62U

17Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62 - Main SequencesHeating sequence or Direct Acting sequence

Application No.: 10 - 19

Y1

Out

put

Vol

tage

SetpointLoad

X1Y1

Temp.RWD62U

Y

Output Y1 can be switched from D.A. to R.A.

18Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62 - Main Sequences2 Heating sequences or 2 Direct Acting sequences

Application No.: 20 - 29

Y1

Out

put

Vol

tage

SetpointLoad

Y2

Setpoint

X1Y1

Temp.RWD62U

Y Y2

Outputs Y1 and Y2 can be switched from D.A. to R.A.

19Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62 - Main SequencesHeating + Cooling sequences or Direct+ Reverse acting sequences

Application No.: 30 - 39

Y1

Out

put

Vol

tage

SetpointLoad

Y2

Setpoint

X1Y2Y1

Temp.RWD62U

Y

Output Y1 can be switched to R.A. and Y2, D.A.

20Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62 - Main SequencesCooling sequences or Reverse Acting sequences

Application No.: 40 - 49

X1Y1

Temp.RWD62U

Y

Y1

Out

put

Vol

tage

SetpointLoad

Output Y1 can be switched to D.A.

21Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD62 - Main Sequences

Application No.: 50 - 59

X1Y2Y1

Temp.RWD62U

Y

Y1

Out

put

Vol

tage

SetpointLoad

Y2

Setpoint

2 Cooling sequences or 2 Direct Acting sequences

Output Y1 and Y2 can be switched to D.A.

22Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U

23Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U controller

E1 Electrical loadN1 RWD68U ControllerPC Personal computerQ1 Potential-free relay contacts for two-position controlS1 Time clock or switchSN System neutralSP System potentialX1 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

24Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68UApplications with corresponding selectable auxiliary function

Application No. Summary(H = Heating, C =Cooling, R = ReverseActing, D = DirectActing)(The 1st digit = MainControl Loop, The 2nddigit = Auxiliary Control

Loop)

MainLoop

#1xH or D

sequence

#2xH+H or D+D

depend.

#3xH+H or D+D

independ.

#4xDig H + ana C or

Dig R + ana D

#5xAna H + dig C orana R + dig D

#6xC+C or D+D

depend.

#7xC+C or D+Dindepend .

#8xC or D

sequence

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 usingactive input #19 #29 #39 #49 #59 #69 #79 #89

25Siemens Building Technologies Inc.

HVAC Products

RWD controllers

Main Sequences

RWD68U

26Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main SequenceHeating sequence or Reverse Acting sequence

Application No.: 10 - 19

X1Q1

Temp.RWD68U

On

OffQ1

OFF

ON

SD SD2 2

SD

Setpoint

Q

(SD = Switching Differential)

27Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence2 Heating sequences or 2 Direct Acting sequences (Dependent)

Application No.: 20 - 29• Heating coil with electric heater• By-pass system with pump & 3-way valve• Output Y1 can be switched to R.A.

Y1Max V

HeatingLoad

Setpoint

Out

put

Vol

tage Q1

OFF

ON

Min V X1Y1Q1

Temp.RWD68U

Y

Q1

28Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence

Application No.: 30 - 39

2 Heating sequences or 2 Direct Acting sequences (Independent)

Y1

Min VLoad

Setpoint

Oup

tut

Vol

tage

e

OFF

ONQ1SD

SD SD2 2

Max V

X1Y1 Q1

Temp.RWD68U

Y

Q1

Output Y1 can se switched to R.A.

29Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence

Application No.: 40 - 49

X1Y1 Q1

Temp.RWD68U

Y

Q1

Heating + Cooling sequences or Reverse + Direct acting sequences

Y1

Min VLoad

Setpoint

Oup

tut

Vol

tage

e

OFF

ONQ1 SD

SD SD2 2

Max V

Output Y1 can be switched to R.A.

30Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence

Application No.: 50 - 59• Heating Coil and Direct Chiller• Output Y1 can be switched to D.A.

X1Y1 Q1

Temp.RWD68U

Y

Q1

Y1

Min VLoad

Setpoint

Oup

tut

Vol

tage

e

OFF

ONQ1SD

SD SD2 2

Max V

Heating + Cooling sequences or Reverse + Direct acting sequences

31Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence2 Cooling sequences or 2 Direct Acting sequences (Dependent)

Application No.: 60 - 69• Direct chiller• Output Y1 can be switched to D.A.

Y1Max V

CoolingLoad

Setpoint

Out

put

Vol

tage Q1

OFF

ON

Min V X1Y1Q1

Temp.RWD68U

Y

Q1

32Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main Sequence2 Cooling sequences or 2 Direct Acting sequences (Independent)

Application No.: 70 – 79Output Y1 can be switched to D.A.

X1Y1Q1

Temp.RWD68U

Y

Q1

Y1

Min VLoad

Setpoint

Oup

tut

Vol

tage

e

OFF

ONQ1SD

SD SD2 2

Max V

33Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD68U - Main SequenceCooling sequence or Direct Acting sequence

Application No.: 80 – 89Output Y1 can be switched to D.A.

X1Q1

Temp.RWD68U

On

OffQ1

OFF

ON

SD SD2 2

SD

Setpoint

Q

(SD = Switching Differential)

34Siemens Building Technologies Inc.

HVAC Products

RWD controllers

Auxiliary Functions

RWD

35Siemens Building Technologies Inc.

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RWD controllers

RWD - Auxiliary Functions

A remote setpoint transmitter QAA25U (1K Ni) or 544-764 1K Plat), connected to X2 and configured accordingly, assumes the function of the setpoint

1. Remote setpoint (#_1)

X1Y2Y1

Temp.RWD62U

YX2

36Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

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.

2. PI Limiter (#_2 & #_3)

X1Y2Y1

Temp.RWD62U

Y X2

37Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

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.

3. Setpoint Compensation (#_4)

X2Y2Y1

Temp.RWD62U

YX1

38Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

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.

4. Cascade Control (#_5)

X1Y2Y1

Temp.RWD62U

Y X2

39Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

X2M terminals (Digital/analog)

A digital switch or anlog output between terminals X2 and M can be used to implement summer/winter changeover.

5. Summer / Winter operation (#_6 & #_7)

X1Y2Y1

Temp.RWD62U

YD1

T

40Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

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).

5. Summer / Winter operation (#_6 & #_7) (Cont.)

41Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Auxiliary Functions

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.

6. Maximum Priority (#_8)

X1Y2Y1

Temp.RWD62U

Y X2

42Siemens Building Technologies Inc.

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RWD controllers

RWD - Auxiliary Functions

D1M 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.

7. Day / Night Setpoint (For all RWD’s, independent of App. No.)

X1Y2Y1

Temp.RWD62U

YD1

43Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD - Software tool125-3481

•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