24
07.4
HYDRAULIC KIT
F
ig
. 1
illustrates hydraulic kit components without DHW production, standard pre-installed on the MEC 21-18 kW boiler. Following is an
itemised list of these components:
1.
8 litre expansion tank
2.
Heat circulation pump
3.
High efficiency circulating pump
4.
Pressure transducer
5.
Anti-condensation valve
6.
Heat return
7.
Stove drain
8.
Heating plant water load inlet
9.
Water gauge
10.
Heating flow
11.
Cut-off valve (not included, supplied by the customer)
12.
Outlet (pulley), to be installed facing the stove
F
ig
. 3
illustrates the air breather unit:
A.
Air breather valve
B.
Stove water temperature probe and water safety
thermostat probe well
The high efficiency circulating pump (Fig. 3) supplied with kit
consents the heating system designer to choose between two
operation modes:
•
at constant pressure
•
at constant flow
Further being compliant to the European Regulation (ErP- 2015)
concerning savings on Energy-related Products consents to
obtain very low energy consumption (with savings up to around
60% compared to a traditional device currently used).
1-1.2 bar cold pressurised water must always be in the stove. Topping up pressure is manual. After topping up,
make sure the valve is closed.
WARNING
The installation operator is obliged to check
that the closed expansion tank, supplied with the
stove, has a capacity which is suitable for the system
it will be connected to. For medium/large systems, a
heat technician should inspect and calculate the needs
of the rooms to be heated according to current
regulations.
WARNING
F
ig
. 3
F
ig
. 2
A
B
1
2
3
9
5
4
7
8
10
11
12
F
ig
. 1
6
Summary of Contents for MEC 21-18 kW
Page 59: ...ENGLISH NOTE 59...
