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

1Siemens Building Technologies Inc.

HVAC Products

RWD controllers

RWD CONTROLLERS

TECHNICAL

HVAC Products – Americas Region


HVAC Products

RWD controllers

RWD82U


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


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


HVAC Products

RWD controllers

Main Sequences

RWD82U


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)


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



HVAC Products

RWD controllers

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


X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

SetpointLoad0%

100%


HVAC Products

RWD controllers

RWD82U - Main Sequence


X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

Q2

OFF

ON

SD SD2 2

SD

Setpoint

Q1

SD SD2 2

SD

Q


Heating + Cooling sequences or Reverse + Direct acting sequences


HVAC Products

RWD controllers

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


Q1

OFF

ON

SD SD2 2

SD

Setpoint

Q2

SD SD2 2

SD

Q


X1Q1

Temp.RWD82U

On

OffQ1

Q2

Q2


HVAC Products

RWD controllers

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


X1Q1

Temp.RWD82U

On

OffQ1

Q2

Q2

OFF

ONSD

Setpoint

Q



HVAC Products

RWD controllers

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


X1Q2Q1

Temp.RWD82U

On

OffQ1 Q2

SetpointLoad0%

100%


HVAC Products

RWD controllers

RWD62U


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


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


HVAC Products

RWD controllers

Main Sequences

RWD62U


HVAC Products

RWD controllers

RWD62 - Main SequencesHeating sequence or Direct Acting sequence


Y1

Out

put

Vol

tage

SetpointLoad

X1Y1

Temp.RWD62U

Y

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


HVAC Products

RWD controllers

RWD62 - Main Sequences2 Heating sequences or 2 Direct Acting sequences


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.


HVAC Products

RWD controllers

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


Y1

Out

put

Vol

tage

SetpointLoad

Y2

Setpoint

X1Y2Y1

Temp.RWD62U

Y

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


HVAC Products

RWD controllers

RWD62 - Main SequencesCooling sequences or Reverse Acting sequences


X1Y1

Temp.RWD62U

Y

Y1

Out

put

Vol

tage

SetpointLoad

Output Y1 can be switched to D.A.


HVAC Products

RWD controllers

RWD62 - Main Sequences


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.


HVAC Products

RWD controllers

RWD68U


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


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


HVAC Products

RWD controllers

Main Sequences

RWD68U


HVAC Products

RWD controllers

RWD68U - Main SequenceHeating sequence or Reverse Acting sequence


X1Q1

Temp.RWD68U

On

OffQ1

OFF

ON

SD SD2 2

SD

Setpoint

Q



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


HVAC Products

RWD controllers



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.


HVAC Products

RWD controllers



X1Y1 Q1

Temp.RWD68U

Y

Q1


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.


HVAC Products

RWD controllers


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



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


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


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



HVAC Products

RWD controllers

Auxiliary Functions

RWD


HVAC Products

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


HVAC Products

RWD controllers


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


HVAC Products

RWD controllers


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


HVAC Products

RWD controllers


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


HVAC Products

RWD controllers


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


HVAC Products

RWD controllers


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.)


HVAC Products

RWD controllers


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


HVAC Products

RWD controllers


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


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

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

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