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descrIPtIon
DESCRIPTION OF OPERATION
THE TANk-IN-TANk CONCEPT
The Etech’s series differs from traditional hot water producers in that
it has a tank immersed in the primary fluid contained in the outer
body.
When there is a temperature drop in the boiler because the central
heating system or the domestic hot water circuit needs hot water, the
internal thermostat starts up the power on the immersed electrical
resistors. The heating elements quickly heat up the primary fluid, thus
creating a natural circulation around the tank.
INDIRECTLY HEATING DOMESTIC HOT wATER
This circulation allows easier heat exchange between the primary fluid
and the domestic water, all over the tank surface. The corrugations
on the outer shell of the tank increase the area of heat exchange still
further and thus speed up the process of heating the domestic water.
EASY TO SET AND TOTALLY SAfE
With a single command, the water temperature of both the primary
circuit and the domestic hot water circuit can be set by the adjustable
thermostat situated underneath the tank in the primary circuit.
A cut-off thermostat, placed on the top of the boiler, automatically
switches off the power when the temperature of the water in the
primary circuit reaches 95° C. A manually reset safety thermostat
switches off the system if the temperature reaches 103° C.
BUILD FEATURES
OuTER BODY
The outer body containing the primary fluid is made of thick STW 22
steel.
TANk-IN-TANk TYPE EXCHANGER ACCuMuLATOR
The internal tank which has a large heating surface for the production
of domestic hot water is made of Chrome/Nickel 18/10 stainless
steel. It is corrugated all the way up using an exclusive manufacturing
process and is entirely argon arc welded using the TIG (Tungsten Inert
Gas) process.
INSuLATION
The boiler body is fully insulated by rigid polyurethane foam, with a
thickness of 70mm, with a high thermal insulation coefficient. This is
sprayed onto the tank without using any CFCs.
JACkET
The boiler is covered by a steel jacket which has been scoured and
phosphated before being stove finished at 220° C.
HEATING ELEMENTS
nding on the model, the boiler is fitted with either six or seven
detachable stainless steel AISI 304L immersion heaters.
OVERVIEW
• Combination boiler (central heating and domestic hot water).
• Tank-in-Tank indirect storage type domestic hot water production.
• The central heating connections are designed so that they can be
connected in all three directions, this means that the boiler can be
installed against a wall or in a corner without having to leave any
free space .
• Internal two-stage temperature control thermostat, which allows
the power to be adapted according to actual heat requirements.
• The day/night function allows you to store up a volume of water
at a high temperature during cheap rate periods (at night) and use
the energy stored up in this way at peak rate times (during the
day).
• The boiler is fitted with expansion tanks, a safety valve, a
manothermometer, a water low safety device (pressure switch)
and a circulation pump.
• E-Tech S boilers have an effective output of 14.4 kW for the 160
model and 28.8 kW for the 240 and 380 models. These outputs
can be adjusted either using the power limiting switch on the
boiler’s control panel or by removing the bridges from the control
terminal block.
Stainless steel domestic hot water tank
