• Four work configurations. Automatic configurations’ identification
• Four different operating modes. Modes’ change by a key on the panel
• Mode “StopAll” for stopping the pump control and the boiler, by using a key on the front panel
• Mode “NormalWork” for the pump and boiler control according to the specified temperature limits
• Mode “PumpNonStop” for switching ON/OFF the boiler without pump stoppage, according to the specified limits
• Mode “PumpOnly” for homogeneously liquid mixing in the system without switch the heating on
• Hidden mode “Defrost” for non-stop liquid circulation under temperatures lower than 6,0°C
• Inlet for authorization by weekly programmer or remote push-button
• Built-in digital temperature sensors up to +99°C, with accuracy of ± 0,1°C
• Maximum length of the sensor cables – 30 m. from the controller
• Measuring of the inlet and outlet boiler temperature, room temperature
• Measured temperatures are shown on a LCD display
• Temperatures variations – animation, accuracy of ± 0,1°C
• Pump and heater condition indicated on the front panel
• User-friendly keyboard, simplified menus, automatic save
• Menu to set the maximum temperature of the boiler outlet
• Menu to set the minimum temperature of the boiler inlet
• Quick menu to change the room temperature
• Incorrect data input inadmissible
• Integrated room temperature hysteresis -0,7°C / +0,7°C
• Keeping your data safe when power supply voltage drops, even battery n.a.
• The system pump switches on prior the heater (programmable)
• Compatible with all alternating current contactor types
• Smooth current start/stop through the power authorities
• Integrated RC suppressor and varistor with voltage 275V, for each triac output
• Integrated fuse. LED indication for a burnt fuse
• Mounting on DIN rail in the panel with covering area of 6 standard modules
• Power supply – AC 220V, 50 Hz

The BS-HC3 controller has been designed for control operation of various heating apparatus, including electrode boilers for local steam heating. It can be used for different thermal processes, with heating up to +100°C.

The BS-HC3 controller with LCD display continuously shows the measured temperatures (by 1, 2 or 3 sensors). Animated arrows indicate the direction of the temperature variation. There are also provided suitable buttons for easy and flexible access to all settings, without necessity of additional tools. Incorrect data input for temperature limits is forbidden.

The operating condition of the pump and heater is visible in distance, due to the front panel sensors (green for the pump, red for the heater contactor). There is a terminal strip connection to an outer ON/OFF switch (for control allowed / not allowed) with constant temperatures measuring and display indication. This input can be used to connect the controller with programmable weekly timers, contact thermometers with normally closed contact, etc.

The BS-HC3 controller automatically identifies the connected temperature sensors t1, t2 and t3. The power authorities will not activate if the said sensors are not connected to the terminals. The controller shall operate in the following configurations depending on the positions of the sensor connection:

The system shall operate with this minimum configuration if sensor t1 is connected to terminals 10, 11 and 12. Sensor t1 measures the temperature at the outlet of the boiler.
• Active modes: “StopAll”; “NormalWork”; “PumpNonStop”; “PumpOnly”
• Economic operation of the heater is not guaranteed
• Many changes of the temperature limits are needed to obtain the optimal mode
• Precise maintenance of the room temperature is not guaranteed

The system should operate with two sensors for reliable and economic control of the boiler. Sensor t1 is connected to terminals 10, 11, 12 and measures the temperature at the outlet of the boiler. Sensor t2 is connected to terminals 13, 14, 15 and measures the temperature at the inlet of the boiler.
• Active modes: “StopAll”; “NormalWork”; “PumpNonStop”; “PumpOnly”
• Several changes of the temperature limits are needed to obtain the optimal mode
• The optimal mode can be reached by multiple changes of the temperature limits
• Precise maintenance of the room temperature is not guaranteed

For reliable, economic and precise control of a protracted boiler, the all three sensors should be connected to the controller: t1, t2 and t3 – the last is a room temperature sensor which is connected to terminals 16, 17, 18.
• Active modes: “StopAll”; “NormalWork”; “PumpNonStop”; “PumpOnly”
• Only few trials are needed to obtain the optimal mode
• Economic operation mode of the boiler, rarefied time intervals
• Precise maintenance of the room temperature

The system can operate only with sensors t1 and t3 for more economic operation. In this case the room temperature shall be precisely maintained, but it is not guaranteed the optimal operating mode and the efficient power consumption.
• Active modes: “StopAll”; “NormalWork”; “PumpNonStop”; “PumpOnly”
• Several changes of the temperature limits are needed to obtain the optimal mode
• Economic operation mode of the boiler, rarefied time intervals
• Precise maintenance of the room temperature

• • Module dimensions: 105 x 86 x 57 mm
• • Mounting on DIN rail in the panel with covering area of 6 standard modules
• • Power supply: AC 220V, 50Hz
• • Temperature range: -40°C ÷ +99,9 °C
• • Possible minimum hysteresis: 1,0°C
• Room temperature hysteresis: ±0,7°C• Measuring accuracy & indication: -0,1°C• Maximum length of the thermocouples – 30 m• Integrated simistors: 6A, 8A, 12A or 16A, 220V

• BS-HC3 with one temperature sensor + cable 2m. - 65 EUR incl. VAT
• BS-HC3 with two temperature sensors + 2 cables 2m. - 70 EUR incl. VAT
• BS-HC3 with three temperature sensors, room temperature sensor + cable 5m. - 78 EUR incl. VAT

• Extension cable for sensor 4x035 - 0.45 EUR with VAT

Important clarification

We do not resell foreign controllers, systems and devices! All electronic modules of the displayed products were invented by Bisser Systems EOOD in Varna, Bulgaria. We maintain our systems and are proud of their long-standing and uncompromising work. Some of the developments are in series production by other companies, which is why we support the Bulgarian production. Many of the products are not shown due to the express desire of our customers.