Rotex GCU compact 315, Installation And Maintenance Instructions Manual

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3 x Product description
FA ROTEX GCU2 - 06/2017
15
Optimum water hygiene
There are no low flow or unheated zones on the domestic water
side with the ROTEX GCU compact. It is not possible for sludge,
rust or other sediments to be deposited, as can be the case with
other large volume tanks. The water fed into the system first is
also discharged first (first in, first out principle).
Low scaling
On the storage tank side scale can only be deposited once. All
the stainless steel heat exchanger pipes in the storage tank water
largely remain virtually free of solid deposits. This means that the
scale cannot build up which would continuously reduce the effi-
ciency of heat transfer (as is the case for other storage designs)
during the operation time.
The thermal and pressure expansion and high flow rates in the
domestic water heat exchanger cause any scale deposits to
loosen, and they are then flushed away.
Using solar power
The hot water storage tank of the ROTEX GCU compact can also
be heated by solar energy. The entire hot water storage tank can
be heated up depending on the heat available from the sun.. The
stored heat is used for the hot water preparation and for the
heating system support. The ISM ("Intelligent Storage Manager")
controls the integrated 3-way valves in such a way that the solar
heat yield is optimally divided and used for hot water preparation
and heating support. The high total storage capacity enables
bridging of periods without a solar yield.
When a ROTEX pressurised solar system or an external heating
boiler is used as an external heat generator, then only one of the
GCU compact with Biv configuration - listed in chap. 3.1 - is per-
mitted as the primary hot water storage unit.
On the GCU compact Biv models the complete storage tank is
designed as a hot water zone. It is possible to make thermal use
of solar energy for hot water preparation. The solar component is
optimised in combination with an upstream ROTEX Solaris
system (pre-heating stage).
Safety management
The entire safety management of the ROTEX GCU compact is
carried out by an electronic controller. It performs a safety switch-
off in the event of water shortage, gas shortage or undefined op-
erating states. A corresponding fault signal provides an engineer
with all the necessary information for troubleshooting.
Electronic control
An electronic digital controller combined with the burner "intel-
ligent" firing unit automatically controls all heating and hot water
functions for the direct heating circuit and a storage tank charging
circuit.
Optionally, connected RoCon M1 ( 15 70 68 ) mixer modules
can be used to connect and regulate one or more mixed circuits.
All settings, displays and functions are carried out by the inte-
grated RoCon BF controller. The display and the operating ele-
ments make operation easy.
A digital room controller ( RoCon U1 , 15 70 34 ) is optionally
available to provide greater ease of operation. It can be used as
a remote control and room thermostat.
The controller can be connected to the internet by the optional
gateway (
RoCon G1 , 15 70 56 ). This enables remote
control of the ROTEX GCU compact by mobile phones (by app).
Condensing technology
The calorific value engineering makes optimum use of the energy
contained in the heating gas. The flue gas is cooled down in the
boiler – and in the flue system with ambient air-independent op-
eration in the concentric flue gas system – to the extent that the
temperature is below the dew point. A part of the water vapour
generated on combustion of the gas thus condenses. The con-
densation heat is fed to the heating, as opposed to low-temper-
ature boilers, which enables efficiency rates of over 100% (based
on the lower heating value).