Characteristics of ESBE LTC 261, 271 / ESBE CRA 111,121

— They are installed in heating systems with solid fuel / pellet / wood chip boilers with buffer tanks CAS.

— Maintaining the temperature in the boiler min. 60°C (ESBE LTC 261, 271 / CRA 111/121 set to 60°C) for protecting the boiler from condensation.

— At a boiler temperature below 60°C, the circulation pump returns water from the flow to the return via a short circuit through the group / valve.

— The LTC 261 and 271 groups are equipped with a circulation pump, three shut-off valves and control thermometers, one on each line.

— Actuators CRA 111/121 must be set on 60°C, installed on 3-way mixing valves and a circulating pump of adequate size is required.

— CRA 111 is intended for 3-way mixing valves up to DN50. Supplied with transformer (230V) and temperature sensor.

— CRA 121 is intended for 3-way mixing valves from DN65 to DN150. Supplied with detachable controller with display, transformer (230V) and temperature sensor.

Proposal for selection of LTC groups and CRA actuators for 3-way mixing valves:

Boiler heat output

14-40

41-50

51-70

71-110

111-580

LTC 261 connection

LTC 271 connection

(internal thread)

(internal thread)

VTC 512 / VTC 531

CRA111 connection

CRA121 connection+ 3-way

+ 3-way valve + pump

valve + pump

5/4''

--

--

--

--

--

6/4''

--

--

--

--

--

vidistr.48

--

--

--

--

--

DN50

--

--

--

--

--

DN65-DN150

ESBE LTC 261,271, CRA 111, 121

Recommended volumes of

buffer tanks CAS

With wood pellet

boilers

With wood chip

boilers

With solid fuel

boilers

With wood gasification

(pyrolytic) boilers

min.10 lit/kW

min.12 lit/kW

min.30 lit/kW

min.50 lit/kW