LK Armatur ThermoMat E ECO LK 811 Manuel D'instructions page 3

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Mounting
LK 811 ThermoMat E Eco is installed in the return circuit bet-
ween the solid fuel boiler and the storage tank. The unit should be
mounted upright with the drive-shaft of the circulating pump in
a horizontal position. The loading unit is mounted to the right or
left of the heating boiler.
The return temperature to the boiler is set with the controller.
Please, follow the recommendations of the boiler manufacturer.
The pump speed is set with the knob.
For a trouble free system the piping work must be done without
air pockets. If this is not possible the system must be fi tted with
air vents.
Several boilers have integrated thermostats for pump control. If
not, a fl ue gas thermostat must be installed. The circulation pump
should start at the same time as the fi ring. The pump should stop
soon after the fi re has gone out to let the remaining hot water in
the boiler self-circulate to the storage tank.
Dimensioning
Pipe dimensioning between heating boiler and storage tank:
• LK 811 ThermoMat E ECO loading unit with Rp 1" ball valves.
For heating boilers up to 35 kW ..... DN 25
• LK 811 ThermoMat E ECO loading unit with 28 mm ball valves.
For heating boilers up to 35 kW .... DN 28
• LK 811 ThermoMat E ECO loading unit with Rp 1¼" ball valves.
For heating boilers up to 75 kW ... DN 32
Function
1. Heat up phase
The water circulates between boiler and
loading unit while the temperature of the
boiler is rising.
2. Loading phase
The mixing valve starts to open and allows
return water from the storage tank to be mixed
with supply water before it returns to the
boiler. The return temperature to the boiler is
kept constant.
3. End phase
The mixing valve is fully open towards the
storage tank. This results in an optimal transfer
of heat from the boiler and the storage tank
is fi lled with supply water. When the boiler
has cooled the electronic controller LK 100
SmartComfort CT prevents re-circulation
from storage tank to boiler.
4. Self-circulation with check valve
Self-circulation will be obtained as soon
as the fi re has gone out and the circulating
pump has stopped. The remaining hot water
is loaded to the storage tank. In case of power
failure or pump breakdown the check valve
automatically opens to allow self-circulation.
The check valve also stops recirculation from
storage tank to boiler.