model 2704 controller installation and operation handbook - Soliton

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Controller Applications 2704 Controller 10.3. HUMIDITY CONTROL 10.3.1. Overview Humidity (and altitude) control is a standard feature of the 2704 controller. In these applications the controller may be configured to generate a setpoint profile (see Chapter 6 ‘Programmer Operation’). Also the controller may be configured to measure humidity using either the traditional Wet/Dry bulb method (figure 10.2) or it may be interfaced to a solid state sensor. The controller output may be configured to turn a refrigeration compressor on and off, operate a bypass valve, and possibly operate two stages of heating and/or cooling Wet RTD Dry RTD Wet Bulb Offset Altitude Compensation Psychometric Constant Humidity Control Block %RH Dew Point Sensor Failure Figure 10-2: Humidity Control Block 10-8 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00
2704 Controller Controller Applications 10.3.2. Example Of Humidity Controller Wiring Dehumidify valve DC 4A 1A HA L L PSU SCR for temperature control D1 D2 D3 4B 4C 4D 1B 1C 1D HB HC HD N D8 N Humidify Solenoid D4 D5 D6 5A 5B 5C 2A 2B 2C HE HF JA E1 E2 AA D7 5D 2D JB AB Drive capability of digital outputs 1.5mA using the internal power supply or 40mA with an external supply VH V1 V+ V- 6A 6B 6C 6D 3A 3B 3C 3D JC JD JE JF AC BA BB BC Dry bulb temp Wet bulb temp In the above example the following modules are fitted. This will change from installation to installation: Module 1 Analogue or relay to drive dehumidify valve Module 3 PV input module for wet bulb temperature RTD Standard Digital I/O Used as logic outputs for humidify solenoid valve and temperature control SCR Standard PV Input For the dry bulb RTD used for the temperature control and humidity calculation Figure 10-3: Example of Humidity Controller Connections Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 10-9
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2704 Controller Contents MODEL 2704
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2704 Controller Contents 5. CHAPTER
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2704 Controller Contents 7. CHAPTER
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2704 Controller Contents 13. CHAPTE
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2704 Controller Contents 18. CHAPTE
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2704 Controller Contents B. APPENDI
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2704 Controller Contents LIST OF FI
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2704 Controller Contents Figure 18-
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2704 Controller Introduction 1. Cha
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2704 Controller Introduction 1.2. W
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2704 Controller Introduction ➃
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2704 Controller Introduction 1.4.1.
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2704 Controller Introduction 1.6. I
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2704 Controller Installation 2. CHA
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2704 Controller Installation 2.1.3.
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2704 Controller Getting Started 3.
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2704 Controller Getting Started Ins
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HUMIDITY INPUT OPERS TIMER BLOCKS P
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2704 Controller The Summary Page 5.
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2704 Controller Digital Programmer
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2704 Controller Alarm Operation 7.
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2704 Controller Alarm Operation 7.2
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2704 Controller Module IO 18. CHAPT
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2704 Controller Diagnostics 20. CHA
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2704 Controller Diagnostics Note 1.
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2704 Controller Appendix A A. APPEN
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2704 Controller Appendix A B. QUICK
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2704 Controller Safety and EMC Info
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2704 Controller Technical Specifica
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