Loading unit

LK 815 ThermoKit T

• Complete kit

• Low-energy pump

TECHNICAL DATA

Voltage

230 VAC 50/60 Hz

Power consumption

12-140 W depending on pump speed

Max. boiler efficiency

140 kW at 20 °C ΔT

Max. working pres-

sure

1.0 MPa (10 bar)

Working tempera-

ture

Min. 5 °C/Max. 95 °C

Max. flow

5900 l/h

Return temperature

45 °C, 50 °C, 55 °C, 60 °C, 65 °C or 70

°C

Ambient tempera-

ture

Min. 5 °C/Max. 40 °C

Thread standard

Rp - female thread,

G - female thread

Media

Water - Glycol mixture max. 50%

Circulating pump

Grundfos UPML 25-95 180

Material, valve body

Brass EN 1982 CB753S

Material, insulation

Expanded Polypropylene EPP

LK 815 ThermoKit T 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 815 ThermoKit T Eco consists of a low-energy circulat-

ing pump, an LK 823 ThermoVar thermic loading valve with

insulation, a check valve, a thermometer for reading return

temperature and three ball valves to simplify installation and

maintenance. 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, if the need for servicing arise.

Thermometers are available as accessory, art. no. 181736.

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 thermic 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 thermostatic element is fully open. This results in an

optimal transfer of heat from the boiler and the storage tank is

filled with supply water.

4. SELF-CIRCULATION

As soon as the fire has gone out and the circulating pump has

stopped the remaining hot water in the boiler is loaded to the

storage tank as long as the thermic valve remains open. When

the boiler has cooled the thermic valve closes. The check valve

prevents recirculation from storage tank to boiler.

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