23
60T - 280T
COSMOGAS
Figure 4-6 - Example of diagram of efficiency / delivery and return temperature / outdoor temperature,
for a home, in a very cold area and a system with radiators.
This system allows the delivery temperature to be managed
automatically depending on the outdoor temperature. An
example of this in operation is shown in the form of a graph in
figure 4-6. The graph shows an example in which the delivery
and return temperatures are 55°C and 43°C respectively,
and the outdoor temperature is 0°C. The external sensor
commands modulation of the boiler, gradually reducing the
delivery temperature and optimising efficiency. Efficiency
changes from 97% when the outdoor temperature is -15°C
to 105.8% with outdoor temperature of 0°C and up to 109%
with outdoor temperature of 20°C.
4.1.4 - Primary circuit pump
The boiler is expressly manufactured without an internal pump
in order to give the installer the option of being able to connect
any pump, even a modulating one. In figures 10-1 and 10-2
the primary circuit pump is detail “36”. When choosing this
pump the designer must check the system features as well
as the details in section 10.11.
4.1.5 - Central heating circuit pump
The central heating circuit pump, detail “19” in figures 10-1 and
10-2, is not supplied to give the installer the option of being
able to connect any pump, even a modulating one. When
choosing this pump the designer must check the features of
the system.
4.1.6 - Domestic hot water circuit pump
The domestic hot water circuit pump, detail “28” in figure
10-2 and detail “36” in figure 11-1, is not supplied to give the
installer the option of being able to connect any pump, even a
modulating one. When choosing this pump the designer must
check the features of the system.
4.1.7 - Hydraulic separator
If the system must be served by a water flow rate that is
higher than the pump can deliver, a hydraulic separator must
be inserted between the boiler and the system (see figures
10-1 and 10-2, detail “20”).
4.1.8 - MYDENS boiler production of
domestic hot water
For the production of domestic hot water a storage tank must
be connected following the diagram in figure 10-2.
The temperature of the domestic hot water is adjusted
following the procedure in section 17.6.
4.1.9 - Types of system
The following types of system can be set up with this appliance:
- System solely for central heating (see figure 10-1)
- System solely for the production of domestic hot water (see
figure 11-1)
- System for central heating and the production of domestic
hot water (see figure 10-2)
4.2 - Precautions for installation
For the boiler to work well, respect the following directions:
This appliance must be connected to a central heating
system and if need be to a domestic hot water distribution
network, compatible with the features, performance and
power of the appliance itself.
Check figures 7-1 and 7-2 regarding minimum distances
to be observed for installation and future maintenance.
4.3 - Anti-Legionella
MYDENS (when connected to a storage tank) and AGUADENS
appliances do not have anti- legionella protection:
It will be the responsibility of the installer to keep the
temperature of the storage tank at not less than 60°C to ensure
disinfection or else to use equivalent systems.
4 - OPERATION
Содержание AGUADENS 210T
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