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BF-8803A Integrated controller of heat collection cycle and heat

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Functions overview

BF-8803A integrated heat collection circulation and heating controller is incorporated with a temperature controller and a temperature difference controller, and can be used to detect both high temperature (HT) and low temperature (LT) at two points (HT for collector plate and LT for water tank).

When the [LT sensor] is used alone, one-channel temperature control outputs can be generated. When the two [HT & LT] sensors are used simultaneously, two-channel temperature difference circulation can be controlled based on the temperature difference between these two sensors.

In the temperature difference control mode, the anti-freeze circulation function will be activated when a low temperature is detected on the collector plate, and the temperature difference control output is NO. In the temperature control mode, the outputs are NO and NC.

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 contacts output, two-channel NO contact output

  • Constant-temperature heating

  • Manual heating

  • Temperature difference circulation

  • Manual temperature difference circulation

  • Collector plate anti-freeze circulation

  • Real-time display of temperatures in HT and LT zones

  • 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)

58 (L) × 78 (W) × 85 (T)

Installation and Dimensions (mm)

Window-mounted, opening size: 51 (L) ×71 (W)


Net weight: 0.278Kg

Gross weight: 0.344Kg

Power Supply and Consumption Power

AC (80240)V, 2W

Operating Conditions

-10℃~ 50℃

Display Mode

LED digital display


Push-type membrane keys


Two-channel (240K) NTC thermistor temperature sensor input, measurement range: -20 ℃120 ℃


1. One-channel relay NO/NC contact temperature control outputs; two-channel relay NO/NC contact temperature difference circulation outputs

2. Current capacity of each 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

Display range of measurement in HT zone: 0120 ℃

Display range of measurement in LT zone: 099 ℃

Setting Range

Range of temperature control value: upper limit 090 ℃, lower limit 090 ℃

Range of temperature difference value: upper limit 230 ℃, lower limit 130 ℃

Control Range

Range of temperature control value: upper limit 090 ℃, lower limit 090 ℃

Range of temperature difference value: upper limit 230 ℃, lower limit 130 ℃

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

Power Supply and Input & Output Ports


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