Load unit
LTC300
- Fully adjustable pump speed to optimize the storage tank loading.
- Accurate control of the return water temperature.
- High efficiency pump according to the ErP directive.
- Integrated venting function.
The series LTC300 is a load unit with integrated high efficiency pump. The load unit makes sure that the boiler gets up to a high combustion temperature so as to ensure the lowest possible emissions.
Above all, the load unit make sure that the return temperature to the boiler is kept high and guaranteed over the entire combustion cycle which enables a higher level of boiler efficiency, reduced tarring and increased life span of the boiler. The high efficiency pump included in the load unit fulfills the new EU directive on energy related products. This directive defines the standardized requirements for energy efficiency and maximizes the EEI (Energy Efficiency Index) to 0,20.
Product range
LTC341, Internal thread with electronic 4 m pump
| Art.no. | Reference | DN | Power [kW] | Power (max. ∆t [°C]) | Opening temperature | Connection Adapter | A [mm] | B [mm] | C [mm] | D [mm] | Weight [kg] |
| 55005300 | LTC341 | 25 | 60 | 35 | 55°C ± 5°C | G 1“ | 213 | 42 | 212 | 118 | 4,4 |
| 55005400 | LTC341 | 25 | 50 | 30 | 60°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
| 55005500 | LTC341 | 25 | 45 | 25 | 65°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
LTC361, Internal thread with electronic 6 m pump
| Art.no. | Reference | DN | Power [kW] | Power (max. ∆t [°C]) | Opening temperature | Connection Adapter | A [mm] | B [mm] | C [mm] | D [mm] | Weight [kg] |
| 55006000 | LTC361 | 25 | 90 | 35 | 55°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
| 55006100 | LTC361 | 25 | 80 | 30 | 60°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
| 55006200 | LTC361 | 25 | 65 | 25 | 65°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
| 55006300 | LTC361 | 25 | 50 | 20 | 70°C ± 5°C | G 1" | 213 | 42 | 212 | 118 | 4,4 |
| 55006400 | LTC361 | 32 | 90 | 35 | 55°C ± 5°C | G 1¼" | 227 | 42 | 219 | 118 | 4,6 |
| 55006500 | LTC361 | 32 | 80 | 30 | 60°C ± 5°C | G 1¼" | 227 | 42 | 219 | 118 | 4,6 |
| 55006600 | LTC361 | 32 | 65 | 25 | 65°C ± 5°C | G 1¼" | 227 | 42 | 219 | 118 | 4,6 |
| 55006700 | LTC361 | 32 | 50 | 20 | 70°C ± 5°C | G 1¼" | 227 | 42 | 219 | 118 | 4,6 |
LTC381, Internal thread with electronic 8 m pump
| Art.no. | Reference | DN | Power [kW] | Power (max. ∆t [°C]) | Opening temperature | Connection Adapter | A [mm] | B [mm] | C [mm] | D [mm] | Weight [kg] |
| 55006800 | LTC381 | 40 | 110 | 35 | 55°C ± 5°C | G 1½" | 225 | 42 | 218 | 118 | 4,6 |
| 55006900 | LTC381 | 40 | 95 | 30 | 60°C ± 5°C | G 1½" | 225 | 42 | 218 | 118 | 4,6 |
| 55005200 | LTC381 | 40 | 80 | 25 | 65°C ± 5°C | G 1½" | 225 | 42 | 218 | 118 | 4,6 |
Installation support
Install ESBE Load Unit – LTC300
Replace the thermostat – ESBE LTC300 Load Unit
Activate auto-circulation – ESBE LTC300 Load Unit
Installation examples
Documents
| Name | Download |
| Installation instruction LTC300 |
|
Technical data
Technical data
| Pressure class: | PN 6 |
| Leakrate A - AB: | max. 0,5% of max. flow |
| Leakrate B - AB: | max. 3% of max. flow |
| Supply voltage: | 230 ± 10% V AC, 50 Hz |
| Cable length: | 3,0 m |
| Power consumption: | LTC341: max. 20 W; LTC361: max. 43 W; LTC381: max. 80 W |
| EEI (Energy Efficiency Index), circulation pump: | <0,20 |
| Energy classification: | A |
| Rangeability Kv/Kv min: | 100 |
| Connections: | Internal thread (G), ISO 228/1 |
| Media, Heating water: | in accordance with VDI2035 |
| Media, Water/Glycol mixtures: | max. 50 % |
| Media, Water/Ethanol mixtures: | max. 28 % |
| Media temperature, max.: | +110 °C |
| Media temperature, min.: | 0 °C |
| Ambient temperature, max.: | +60 °C |
| Ambient temperature, min.: | 0 °C |
| Material, valve body: | Nodular iron EN-JS 1050 |
Conformity
SI 2016 No. 1105
EMC 2014/30/EU
RoHS3 2015/863/EU
ErP 2009/125/EU
SI 2016 No. 1091
SI 2012 No. 3032
SI 2010 No. 2617
Flow pattern
Dimensioning
Wiring
Accessories and spare parts
Options
| Art No. | Reference | Designation | |
 |
57060500 | LTC801 | ESBE LTC801 Shut-off valves / Adapters G1½" x G1", 3pcs. |
|
57060600 | LTC801 | ESBE LTC801 Shut-off valves / Adapters G1½" x G1¼", 3pcs. |
|
57060700 | LTC801 | ESBE LTC801 Shut-off valves / Adapters G1½" x G1½", 3pcs. |
|
57060800 | LTC801 | ESBE LTC801 Shut-off valves / Adapters G1½" x G2", 3pcs. |
|
57060900 | LTC801 | ESBE LTC801 Shut-off valves / Adapters G1½" x CPF 28mm, 3pcs. |
Spare parts
| Art No. | Reference | Designation | |
 |
57020100 | VTC951 | ESBE VTC951 Thermostat 50°C |
|
57020200 | VTC951 | ESBE VTC951 Thermostat 55°C |
|
57020300 | VTC951 | ESBE VTC951 Thermostat 60°C |
|
57020800 | VTC951 | ESBE VTC951 Thermostat 65°C |
|
57020400 | VTC951 | ESBE VTC951 Thermostat 70°C |
|
57020500 | VTC951 | ESBE VTC951 Thermostat 75°C |
 |
57020900 | LTC922 | ESBE LTC922 Jointing set VTC/LTC, 3pcs of fibre gasket 1½". |
 |
57060400 | LTC921 | ESBE LTC921 Non-return insert. |
 |
57061300 | LTC952 | ESBE LTC952 Thermometer, 3pcs. |
 |
57061400 | LTC953 | ESBE LTC953 Insulation, complete in two parts. |
 |
57061500 | LTC934 | ESBE LTC934 Pump Yonos Para MS/4-20/SC |
|
57061600 | LTC934 | ESBE LTC934 Pump Yonos Para MS/6-43/SC |
|
57061700 | LTC934 | ESBE LTC934 Pump Yonos Para MS/8-60/SC |
Download area
Download area
| Type | Preview | Download |
| Data Sheet | LTC300 |
|
| Installation instruction | LTC300 |
|
| Certificate | Declaration of Conformity, LTC300 |
|
| Certificate | Declaration of Conformity UKCA, LTC300 |
|
| Certificate | Building Product Declaration BPD3, LTC300 |
|
| Certificate | EAC certificate (RU) |
|
| Certificate | UKRSEPRO certificate (UA), LTC300 |
|
| Image | LTC300, high res |
|
| 2D Image | LTC300 |
|
| 3D drawing (stp file) | LTC340, LTC360 DN25 |
|
| 3D drawing (stp file) | LTC380, DN40 |
|
Related materials
Related products
 |
VTC500 | The series VTC500 is a thermic valve used for solid fuel boilers up to 150 kW. | Data Sheet | Installation instruction |
 |
CTF150 | The series CTF150 is typically used for on/off control of circulation pumps and load units. | Data Sheet | Installation instruction |
 |
VTC300 | The series VTC300 is a compact and accurate load valve used for solid fuel boilers up to 30 kW. | Data Sheet | Installation instruction |
 |
VST200 | The series VST200 prevents excess temperatures in solid fuel fired boilers. | Data Sheet | Installation instruction |
Applications
Applications
Efficient storage tank loading with available safety equipment.
Quick links