By-pass system with load units
Boiler has to operate for a temperature difference 10 to 15
o
C and to insecure that the
temperature of the return water is over 50
o
C. This insures the smooth operation of
the boiler and generally the right operation, the constant performance and the long
lifetime.
To insure that the temperature difference will be between 10 and 15
o
C the installation
needs a recirculation pump and a 3-way thermostatic valve. This system insures the
right temperature of return water and also the right temperature of water at the
radiators.
The ESBE series LTC100 is a load unit designed to protect the boiler from return
temperatures that are too low. Maintaining a high and stable return temperature
enables a higher level of boiler efficiency, reduced tarring and increased life span of
the boiler. The integrated pump offers boiler protection and optimal tank loading.
The LTC100 is used in heating applications where solid fuel boilers are used to feed
storage tanks.
The load unit consists of an integrated pump and thermic valve, designed to make
both assembly and handling easy. The load unit is protected by an insulation shell
and is fitted with easily readable thermometers.
The valve regulates on two ports, which makes it easy to install and does not require
any balancing valve in the bypass pipe.
The LTC100 has an integrated auto-circulation function which makes the unit
operational even during power failure or pump failure. The circulation function is
blocked at delivery, but can easily be activated if required.
The valve contains a thermostat which begins to open connection A at an outgoing
mixed water temperature in connection
AB of 50°C, 55°C, 60°C, 65°C, 70°C or 75°C.
Connection B is fully closed when the temperature in connection A exceeds the
nominal opening temperature with 10°C.
ESBE LTC 100, load unit.
Overheating protection system
In a solid fuels installation with closed type expansion tank it is required to ensure the
protection against overheating, which mainly result from uncontrolled use of wood or
an electrical power failure.
When boiler temperature reaches 90-100
o
C the valve opens and allows the entry of
cold water into the heat exchanger serpentine. The heat exchanger is connected with
one thermostatic valve. The sensor is positioned into the boiler and when the
temperature of boiler reaches a temperature the valve opens and cold water come
into the serpentine. The cold water into the serpentine takes the heating of the boiler
and as a result the temperature of the boiler decreases. The hot water of the
serpentine goes to the drain. The valve responds directly to temperature differences
