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 AC80V～240V power supply.
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
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 (80～240)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: -20～120 ℃ |
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 |
-99～120 ℃ |
Setting Range |
0～60 ℃ |
Control Range |
0～60 ℃ |
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 ℃. |
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