Loading unit

LK 816 ThermoKit E

• Complete kit

• Low-energy pump

LK 816 ThermoKit E Eco is a loading group for heating appli-

cations with solid fuel boilers and storage tanks. The loading

group is intended to ensure a high return temperature as well

as an optimal temperature stratification in the storage tank,

thus increasing the efficiency of the system. Tarring and con-

densation are prevented which prolongs boiler life.

LK 816 ThermoKit E Eco is a unit consisting of a low-energy

circulating pump, an LK 840 ThermoMix mixing valve, an LK

100 SmartComfort CT controller with adjustment of the lowest

return temperature 5 - 99 °C and three ball valves to simplify

installation and maintenance. Articles number 181578 and

181579 are delivered with an insulation for the mixing valve.

The loading group is reversible and can easily be adapted for

mounting to the right or left of the boiler.

Thanks to the three ball valves any part can be changed without

draining the system, should the need for servicing arise.

THE FUNCTION OF THE LOADING UNIT DURING THE

DIFFERENT PHASES OF HEATING:

1. HEAT UP PHASE

The water circulates between boiler and loading group 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 con-

stant.

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 filled with supply water. When the boiler has

cooled the electronic controller prevents re-circulation from

storage tank to boiler.

4. SELF-CIRCULATION

In case of power failure or pump breakdown the electronic con-

troller can be manaully operated and the storage tank is loaded

through self-circulation.

TECHNICAL DATA

Voltage

230 VAC 50/60 Hz

Power consumption

10-180 W depending on pump

speed LK 100 SmartComfort CT

Electronic Controller, 3 VA

Primary voltage, adapter

100-240 VAC 50/60 Hz

Secondary voltage,

adapter

24 VDC 250 mA

Max. boiler efficiency

Dependent on circulating pump

Max. flow

Dependent on circulating pump

Angle of rotation

Temperature Controller: 90°

Torque

Temperature Controller: 5 Nm

Operation time

140 sec.

Max. working pressure

1.0 MPa (10 bar)

Working temperature

Min. 5 °C/Max. 95 °C

Return temperature

5 - 99 °C

Ambient temperature

Min. 5 °C/Max. 40 °C

Thread standard

Rp - female thread,

G - female thread

Protection class

IP 40

Media

Water - Glycol mixture max. 50%

Circulating pump

Grundfos Magna 32-80 180,

Grundfos UPML 25-95 180,

Grundfos UPMXL 32-105 180

Material, valve body

Brass EN 12165 CW617N

Material, insulation

Expanded Polypropylene EPP

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