دليل تعليمات مستشعر درجة حرارة مجرى الهواء من نوع الثرمستور A91PAA-2C من شركة جونسون كونترولز

1. المقدمة

This manual provides essential information for the proper installation, operation, and maintenance of the Johnson Controls A91PAA-2C Thermistor Temperature Duct Sensor. Designed for precise temperature measurement within duct systems, this sensor is intended for use with compatible Johnson Controls Series R81Q and R93 controllers to manage Series M100 actuators and R353 series sequencing modules. Adherence to these instructions will ensure optimal performance and longevity of the device.

2. انتهى المنتجview

The Johnson Controls A91PAA-2C is a highly sensitive thermistor-based temperature sensor specifically engineered for duct applications. It accurately measures air temperature within a range of 4°C to 32°C (39.2°F to 89.6°F), providing critical data to connected control systems. Its robust design ensures reliable performance in industrial and HVAC environments.

الشكل 1: Johnson Controls A91PAA-2C Thermistor Temperature Duct Sensor. This image displays the compact, rectangular enclosure of the sensor, featuring a visible temperature adjustment dial on its side and a probe extending from the top. The device is designed for integration into ductwork for temperature monitoring.

3. معلومات السلامة

تحذير: Improper installation or use of this product can result in personal injury, property damage, or equipment malfunction. Always observe the following safety precautions:

• Disconnect all power to the system before installing or servicing the sensor.
• يجب أن يتم تركيب الأسلاك وتوصيلها بواسطة فنيين مؤهلين وفقًا لجميع قوانين الكهرباء المحلية والوطنية.
• لا تتجاوز التصنيفات الكهربائية المحددة للجهاز.
• تأكد من التأريض المناسب لمنع حدوث صدمة كهربائية.
• Avoid exposing the sensor to corrosive chemicals or extreme physical stress.
• This device is not intended for life-safety applications.

4. الإعداد والتثبيت

The A91PAA-2C sensor is designed for duct mounting. Follow these general guidelines for installation:

1. انقطاع التيار الكهربائي: Ensure all power to the HVAC system and associated controls is completely disconnected before beginning installation.
2. مكان التركيب: Select a location in the ductwork that provides an accurate representation of the air temperature, away from direct heat sources, cooling coils, or air stratification.
3. التركيب: Securely mount the sensor enclosure to the duct using appropriate fasteners. Ensure the probe extends into the airflow as intended.
4. التوصيلات الكهربائية: Connect the sensor to the compatible Johnson Controls controller (e.g., R81Q, R93) according to the wiring diagrams provided with the controller and the sensor's specific documentation. Pay close attention to polarity and terminal designations.
5. تَحَقّق: بعد توصيل الأسلاك، تحقق جيدًا من جميع التوصيلات للتأكد من سلامتها وصحتها.
6. استعادة الطاقة: Restore power to the system and verify sensor operation through the connected controller.

Note: Specific wiring diagrams and detailed mounting instructions may vary based on the overall system design. Always refer to the complete system documentation for precise installation procedures.

5. تعليمات التشغيل

The A91PAA-2C Thermistor Temperature Duct Sensor operates passively, continuously measuring the ambient air temperature within the duct. It transmits this temperature data as a resistance value to a connected Johnson Controls controller. The controller then interprets this data to execute its programmed functions, such as modulating Series M100 actuators or managing R353 series sequencing modules.

• نطاق درجة الحرارة: The sensor is designed to accurately measure temperatures between 4°C and 32°C (39.2°F and 89.6°F).
• معايرة: The sensor is factory-calibrated. No field calibration is typically required for the sensor itself. Any system calibration or offset adjustments should be performed at the controller level.
• يراقب: Temperature readings and system responses should be monitored via the connected Johnson Controls controller interface.

6. الصيانة

The Johnson Controls A91PAA-2C sensor is designed for minimal maintenance. However, periodic inspection and cleaning can help ensure continued accurate operation.

• انقطاع التيار الكهربائي: Always disconnect power to the sensor and associated equipment before performing any maintenance.
• تنظيف: Periodically inspect the sensor probe and enclosure for dust, debris, or obstructions. Gently clean the exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• الاتصالات: Annually, inspect wiring connections for tightness and signs of corrosion. Re-tighten if necessary.
• فحص الضرر: Check the sensor enclosure and probe for any physical damage. If damage is observed, the sensor may need replacement.

7. استكشاف الأخطاء وإصلاحها

If the sensor appears to be malfunctioning, consider the following troubleshooting steps:

• عدم القراءة أو القراءة غير الصحيحة:
  • Verify that power is supplied to the connected controller.
  • Check all wiring connections between the sensor and the controller for proper termination and continuity.
  • Ensure the sensor is correctly configured within the controller's settings.
  • Confirm the sensor is installed in an appropriate location within the duct, not affected by external factors.
  • If possible, test the sensor's resistance value with a multimeter and compare it to the thermistor's resistance-temperature curve (typically found in the controller's documentation or Johnson Controls technical specifications).
• القراءات المتقطعة:
  • افحص الأسلاك بحثًا عن وصلات مفكوكة أو عازل تالف.
  • Check for sources of electromagnetic interference (EMI) near the sensor or wiring.

If troubleshooting steps do not resolve the issue, contact Johnson Controls technical support or a qualified HVAC technician.

8. المواصفات

9. الضمان والدعم

For information regarding the product warranty, technical support, or service, please contact Johnson Controls directly or refer to the warranty documentation provided at the time of purchase. You may also reach out to your authorized distributor or seller for assistance.

Johnson Controls Contact Information: Please visit the official Johnson Controls webالموقع للحصول على تفاصيل الاتصال وموارد الدعم الحالية.