Heating Innovations Limited

 
Home Up solid fuel boiler only automatic boiler only link up operation

 

Link Up Mode (Both boilers working)

 

Solid fuel boilers are most efficient between 55 and 70 deg. C, automatic boilers are made to run at higher temperatures, around 82 deg. C. Because of the big difference between the two temperatures the H2 panel does not mix the two outputs together but when in link up mode the solid fuel energy is diverted into the return of the automatic boiler which then lifts the temperature to its own level, then sends the heat back to H2 for distribution.

The bias thermostat on the H2 Panel is also measuring the flow temperature of the solid fuel flow pipe, when it reaches the temperature set on the bias thermostat (Adjustable between 60 and 70C) it will activate and close down the automatic boiler. (the solid fuel boiler is hot enough to do the job itself) Should the temperature drop the automatic boiler will switch on again.

The lower the bias thermostat is set, the earlier it closes down the automatic boiler.

Heat leak radiator has circuit at all times

Red = Flow. Blue = Return. Orange = Preheated Return. White = Not flowing.

Heat leak radiator has circuit at all times -Sometimes gravity and sometimes pumped

Function 9.  

Pumped Circuit for both boilers operating in tandem when in Heating Mode and Hot Water.

The energy from both boilers being fully pumped through the H2 panel to serve - heating system flow to radiators, etc. and the hot water recharge and the heat leak circuit.

The solid fuel energy is being pulled through valve 22 into the automatic boiler return along with the common return from all the other combined returns of radiators, hot water cylinder and heat leak circuit. The automatic boiler then tops up the temperature to its own level and sends the heat back through motorized valve no 8, which is motored open to the automatic boiler. (closed to the solid fuel boiler). 

In hot water and heating mode, motorized Valve no 10/17 is motored to mid position open to the hot water cylinder and radiators.

Programmer H/W on C/H on

Automatic boiler is on.

Solid fuel appliance is firing and up to working temperature.

Room thermostat is calling. 

Cylinder thermostat is calling. 

Bias thermostat temperature not reached (Adjustable between 60 and 70C)

Pumped circulation to 

  1.  heat leak circuit. 
  2.  hot water cylinder.
  3.  radiators.

 

 

Valve Status.

Heat Leak Diverter Valve no 1  - Electronically closed to shut off the recycling circuit around the heat leak loop.

Motorized Valve no 22 - Normal position sprung open allowing link up mode.
Motorized Valve no 8 - Motored open to the Automatic Boiler . (closed to the Solid Fuel Boiler)
Motorized Valve no 9 - Motored closed.
Motorized Valve no 10/17 - Motored To Mid Position. Open to the Hot Water Cylinder & Radiators.

 

 

Red = Flow. Blue = Return. Orange = Preheated Return. White = Not flowing.

 

Function 10.  

Pumped Circuit for both boilers operating in tandem when in Heating Mode with Hot Water satisfied.

The energy from both boilers being fully pumped through the H2 panel to serve the heating system flow to radiators and a heat leak circuit in link up mode with both automatic and solid fuel boilers firing. The programmer is in hot water and heating mode and the cylinder thermostat satisfied.

As above, but when the hot water cylinder reaches optimum temperature (detected by the cylinder thermostat), motorized valve no 10/17 is motored open to the radiators and closed to the hot water cylinder.

Programmer H/W on C/H on

Automatic boiler is on.

Solid fuel appliance is firing and up to working temperature.

Room thermostat is calling. 

Cylinder thermostat is satisfied. 

Bias thermostat temperature not reached (Adjustable between 60 and 70C)

Pumped circulation to 

  1.  heat leak circuit. 
  2.  radiators.

 

Valve Status.

Heat Leak Diverter Valve no 1  - Electronically closed to shut off the recycling circuit around the heat leak loop.

Motorized Valve no 22 - Normal position sprung open allowing link up mode.
Motorized Valve no 8 - Motored open to the Automatic Boiler . (closed to the Solid Fuel Boiler)
Motorized Valve no 9 - Motored closed.
Motorized Valve no 10/17 Motored Open to the Radiators. (Closed to the Hot Water Cylinder.)

 

Red = Flow. Blue = Return. Orange = Preheated Return. White = Not flowing.

 

Contact Heating Innovations

Technical Support and Sales

Telephone 01354 653854