2. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 1 January 2003 RWD Heat Pump controllers RWD Heat Pump Controllers

3. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 2 January 2003 Heat pump Controllers Why?  Rapid growth in the use of heat-pump technology throughout North America  Sell applications, not components  Increase sales of valves and damper actuators Wholesalers purchasing competitor’s controllers (T775, A350)  Increase RWD range  RWD suitable for commercial applications

4. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 3 January 2003 RWD44U Standard RWD design New LCD with clear heat/cool output status New Digital input options Alarm inputs Suitable for Ni1000, Pt1000 or 0-10vdc inputs Heat/cool or reversing valve/compressor config Flexible output delay times Usable defaults Our standard solution for commercial heat pumps. Easy and flexible settings

5. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 4 January 2003 RWD Heat pump controllers RWD44U  Standard RWD format with LCD  Button or software tool parameter setting  (4) digital outputs configurable  Air to Air / Air to Water Heat-pumps  Suitable for single, dual and triple compressor units  Auxiliary functions applicable to Heat-pumps  24vac

6. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 5 January 2003 RWD44U Internal diagram “Removable terminals are also labeled. Disconnect when commissioning”

7. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 6 January 2003 Two-stage heating and cooling

8. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 7 January 2003 Three stage (CR)compressor - (RV)reversing valve S1= D/N C/O X1= main sensor X2= Remote setpoint

9. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 8 January 2003 RWD44U/45U Aux Functions & Digital Input options Auxiliary Functions  Remote setpoint  Compensation shift  Two sensor averaging  Winter/summer setpoint selection  Sensor select  Active input Digital input options  Standby (on/off)  Alarm  Filter alarm  Day/night setpoints # Refer to application chart for combinations

10. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 9 January 2003 RWD44U/45U Digital input options Standby (on/off) SEH62.1U

11. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 10 January 2003 RWD44U/45U Digital input options Alarm External shutdown, Flow switch, smoke, Common alarm from heat pump Alarm

12. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 11 January 2003 RWD44U/45U Digital input options Filter Alarm Avoid heat pump breakdowns Warning for maintenance personnel to change filter

13. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 12 January 2003 RWD44U/45U Digital input options Day & Night Setpoints Keep internal temperatures within acceptable limits during unoccupied periods SEH62.1U

14. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 13 January 2003 RWD44U/45U Aux functions “Setpoint adjustment should be mechanically limited” Remote setpoint

15. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 14 January 2003 RWD44U/45U Aux functions Compensation shift Enhanced comfort and energy savings X2= SP=  X2= SP= 

16. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 15 January 2003 RWD44U/45U Aux functions Sensor averaging In some areas the temperature may vary from one location to another. X1X2

17. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 16 January 2003 RWD44U/45U Aux functions Sensor Select Flexible solution for special applications. Typical example is a general office area with a seldom used meeting room. Office areaMeeting room OR X2 X1X2X1

18. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 17 January 2003 RWD44U/45U Aux functions Winter/Summer setpoint selection (Digital) Heat pumps for 2-pipe systems (return water temperature control) SP = 76°SP = 72°

19. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 18 January 2003 RWD44U/45U Aux functions Winter/Summer setpoint selection (Analog) Heat pumps for 2-pipe systems (return water temperature control) SP = 72°SP = 76°

20. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 19 January 2003 RWD45U Standard RWD44U design Same auxiliary functions LCD with monitoring of all inputs/outputs Three universal inputs New OpenAir™ economizer control No need for hi/low limit thermostats A single active O/A sensor can be used for a group of controllers “OpenAir™ economizer” or or “RWD44U+ 2nd independent universal modulating loop”. “RWD44U+ 2nd independent universal modulating loop”.

21. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 20 January 2003 RWD Heat pump controllers RWD45U  Standard RWD44U format with LCD  Button or software tool setting  Air to Air / Air to Water Heat-pumps  (4) DO’s and (1) AO configurable  Suitable for single, dual and triple compressor units  Economizer control or 2nd independent (Y) loop  New OpenAir™ economizer sequence  24vac

22. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 21 January 2003 RWD45U Internal diagram

23. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 22 January 2003 RWD45U - OpenAir™ economizer control Remember the days when you could just open a window? Why use cooling energy when the outside air temperature is suitable for cooling? The OpenAir™ economizer feature simply shifts the 1st cooling stage and replaces it with a 0 -10vdc cooling output. This occurs only when cooling is required and the outside temperature is suitable. Introduce outside air via damper actuators. Affordable” Economizer control is not a new innovation, however the RWD45U OpenAir™ solution is an easily implemented and understood concept. “Affordable”

24. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 23 January 2003 RWD45U - OpenAir™ economizer control Economy mode is active only when cooling is required and the X2 temperature is within the maximum and minimum limits. Eco Parameters Min X3 limit Max X3 limit Eco - Xp Y min Y max

25. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 24 January 2003 RWD45U - OpenAir™ economizer control Main benefits Improved air quality Reduced compressor running time Reduced wear on compressor, condenser fan etc Reduce installation costs: 1. Additional outside air limit thermostats not required 2. A single active outside air sensor could be used for multiple controllers Reduced energy consumption - Save We can offer our customers a complete package

26. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 25 January 2003 Two-stage heating and cooling

27. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 26 January 2003 Three stage (CR)compressor - (RV)reversing valve

28. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 27 January 2003 RWD45U - Special applications (example) Packaged water heat pump including supply water control valve via 2nd independent loop X1 controls primary heat pump water temp with X3 controlling the supply water temp to the coils Water system

29. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 28 January 2003 RWD45U - Special applications (example) Rooftop or split heat pump including air quality control via 2nd independent loop X1 controls heat pump room temp with X3 controlling the CO2/VOC level within room Air / AQ AQ processor

30. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 29 January 2003 RWD45U - Special applications (example) Rooftop or split heat pump including humidifier control via 2nd independent loop X1 controls heat pump room temp with X3 controlling the humidifier output to room Air / humidity

31. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 30 January 2003 RWD45U - Special applications (example) Stage control of heat pump including remote monitoring of X1 temperature X1 controls heat pump room temp with Y1 supplying the equivalent signal in 0-10vdc format. Could also control remote SP and stop/start Remote display DDC PLC Alarm system Input to another controller Air or Water

32. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 31 January 2003 RWD for commercial applications RWD must be recommended for commercial applications  Protection against unauthorized adjustment, equipment damage and nuisance service calls.  Optimum comfort and energy savings  MMI should not be available for occupants  Fan speed control should only be applied to residential or small room applications

33. Siemens Building TechnologiesRWD heatpump controllers Xavier Zabalegui/David Jefferson 32 January 2003 RWD heat pump controllers Inside a typical heat pump Rooftop packaged unitIndoor packaged unit