This comprises a series of dedicated sensors measuring temperature and humidity and transmitting an industry-standard 0.2 to 1 bar (3-15 psi) signal to controllers. The controllers are available with proportional and proportional plus integral control outputs with or without reset and remote control point adjustment (CPA). These outputs are used to control air conditioning and heating plants. Direct indication of the controlled variable can be provided by a gauge calibrated to match the output of the sensor installed in the tubing of any convenient point.
The RP920 Pneumatic Controllers provide proportional or proportional integral control of temperature, humidity/or pressure in heating and air conditioning systems depending upon the controller/sensor combination. The construction is of modular design using modern plastic technology providing a high degree of accuracy and reliability, whilst the compact size and rail mounting saves panel space. Compensation and a remote set point facility are available, with either proportional or proportional plus integral output. Gauges can be fitted to indicate the sensor readings and the output pressure. The control output can be selected as either direct or reverse acting to suit the application. The set point scale is 0 to 100% on set point knob. Separate scales for available sensors supplied with controller. Authority is 20 to 300% of main sensor span. Compensation start point is 0 to 100% of compensation sensor span. Integral reset time is 0.5 to 20 min. Proportional Band is 2.5 to 45% of main sensor span.
Features:
- Proportional plus integral control option minimizes offset.
- Miniature diaphragm technology provides high degree of accuracy and reliability.
- Direct Acting models can be converted to Reverse Acting (RA) function in field.
- Field adjustable compensation start point.
- Local or remote setpoint field option. Integral action cut-off provides trouble-free automatic startup.
- Transparent cover (optional) provides protection while allowing easy reading of settings and gages.
- Corrosion resistant construction.
Product Specifications:
- Max. safe air pressure: 2bar
- Ambient temperature: 5°C – 55°C
- Air connection: Dual barbs to fit either 6 x 1mm (1/4″ OD) or 4 x 0.75mm(5/32″ OD) PE tubing. Gauge connection 1/8″ NPT.
Supply air pressure: 1,25bar
- Model: P + I controller with CPA
- Pressure: The controller is capable of operating with the MLP (Mainline pressure) as low as 15 psi (100 kPa) or as high as 23 psi (160 kPa), however recalibration may be required.
- Comments: All RP920s can be converted to reverse acting in the field. For additional technical information see literature Form no. 85-0224 and 95-7392EF.
Models available:
1) RP920A1025 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
2) RP920A1033 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
3) RP920B1023 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
4) RP920B1031 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
5) RP920B1056 Pneumatic Controller, Remote, Action: Reverse, Series 3 changed to eliminate noise
6) RP920C1021 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
7) RP920C1039 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
8) RP920D1029 Pneumatic Controller, Remote, number of pipes: N/S, Action: Direct
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Phone: 954.484.2929
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Web: http://www.DtiCorp.com
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