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BF-15B+ Temperature difference controller( Upper and lower)

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Functions overview

BF-15B+ upper/lower limit temperature difference controller is mainly used for various applications requiring control of hot water circulation and water return systems.

The controller enables intelligent detection of the temperature difference between a [high temperature (HT) point (e.g., heat collector)] and a [low temperature (LT) point (e.g., water tank)]. Once the [temperature difference] reaches the user's preset value, the relay output will be automatically activated to control [circulation pumps] and other loads for cooling and heating circulation of HT and LT media to minimize the temperature difference between the HT and LT temperature zones (temperature difference).

BF-15B+ supports activation only in case of positive temperature difference. No output will be activated if the temperature difference is a negative value. It is easy to operate and the control can be implemented by directly adjusting the upper and lower limits of temperature difference to the desired values.

Thanks to the wide range of rated power supply, the controller is able to ensure stable, reliable and durable operation by adapting to AC80V240V power supply.

Main Features

  • Two-channel 240K NTC temperature sensor input

  • One-channel NO/NC contact output

  • Temperature difference circulation function

  • Display of temperature difference

  • Temperature measurement deviation correction

  • Memory protection after power failure

Specifications and Technical Data

Packing List of Product

1. Main unit

2. 2 x NTC (240K) temperature sensing wires

3. User instructions

4. Mounting bracket

Overall Dimensions (mm)

L 72 × W 72 × D 60

Installation and Dimensions (mm)

Window-mounted, opening size: 68×68

Weight

Net weight: 0.204 Kg  

Gross weight: 0.264 Kg

Power Supply and Consumption Power

AC (80240)V, 2W

Operating Conditions

-10 ~ 50

Display Mode

LED digital display

Keys

Push-type membrane keys

Input

Two-channel 240K NTC thermistor temperature sensor inputs, measuring range: -20120

Output

1. One-channel relay NO/NC contact output for control of temperature difference circulation;

2. Current capacity of output contact: 6 A (resistive load) and 1 A (inductive load)

Able to control a 1000W electric heater or a 200W motor or water pump. AC contactor required for capacity expansion in case of larger load.

Measurement Range

-99120

Setting Range

060

Control Range

060

Other Parameters

1. Temperature sensing wire can be extended by 100 m with ordinary wire for long-distance connection.

2. Memorize the set parameter for a long time after power failure  3. Temperature control hysteresis: 0 30 .


Power Supply and Input & Output Ports




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