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RWD Heat Pump controllers

RWD Heat Pump controllers. RWD Heat Pump Controllers. 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

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RWD Heat Pump controllers

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  1. RWD Heat Pump controllers RWD Heat Pump Controllers RWD heatpump controllers Xavier Zabalegui/David Jefferson

  2. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  3. 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 Standard model Our standard solution for commercial heat pumps. Easy and flexible settings RWD heatpump controllers Xavier Zabalegui/David Jefferson

  4. RWD Heat pump controllers Standard model • 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  5. RWD44U Internal diagram “Removable terminals are also labeled. Disconnect when commissioning” RWD heatpump controllers Xavier Zabalegui/David Jefferson

  6. Two-stage heating and cooling RWD heatpump controllers Xavier Zabalegui/David Jefferson

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

  8. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  9. RWD44U/45U Digital input options Standby (on/off) SEH62.1U RWD heatpump controllers Xavier Zabalegui/David Jefferson

  10. RWD44U/45U Digital input options Alarm External shutdown, Flow switch, smoke, Common alarm from heat pump Alarm RWD heatpump controllers Xavier Zabalegui/David Jefferson

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

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

  13. RWD44U/45U Aux functions Remote setpoint “Setpoint adjustment should be mechanically limited” RWD heatpump controllers Xavier Zabalegui/David Jefferson

  14. RWD44U/45U Aux functions Compensation shift Enhanced comfort and energy savings X2= SP= X2= SP= RWD heatpump controllers Xavier Zabalegui/David Jefferson

  15. RWD44U/45U Aux functions Sensor averaging In some areas the temperature may vary from one location to another. X1 X2 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  16. RWD44U/45U Aux functions Sensor Select Flexible solution for special applications. Typical example is a general office area with a seldom used meeting room. X2 X1 X1 X2 Office area Meeting room OR RWD heatpump controllers Xavier Zabalegui/David Jefferson

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

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

  19. 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 Economizer model “OpenAir™ economizer” or “RWD44U+ 2nd independent universal modulating loop”. RWD heatpump controllers Xavier Zabalegui/David Jefferson

  20. RWD Heat pump controllers Economizer model • 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  21. RWD45U Internal diagram RWD heatpump controllers Xavier Zabalegui/David Jefferson

  22. 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. Economizer control is not a new innovation, however the RWD45U OpenAir™ solution is an easily implemented and understood concept. “Affordable” RWD heatpump controllers Xavier Zabalegui/David Jefferson

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

  24. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  25. Two-stage heating and cooling RWD heatpump controllers Xavier Zabalegui/David Jefferson

  26. Three stage (CR)compressor - (RV)reversing valve RWD heatpump controllers Xavier Zabalegui/David Jefferson

  27. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  28. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  29. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  30. 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 Air or Water Remote display DDC PLC Alarm system Input to another controller RWD heatpump controllers Xavier Zabalegui/David Jefferson

  31. 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 RWD heatpump controllers Xavier Zabalegui/David Jefferson

  32. RWD heat pump controllers Thank you ! Inside a typical heat pump Rooftop packaged unit Indoor packaged unit RWD heatpump controllers Xavier Zabalegui/David Jefferson

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