65
16.4. Combined heating connection, hot water with inertia tank and
domestic hot water
Figure 51 - Connection for underfloor heating, together with another boiler, domestic hot water and combination with
solar panel
Approximate calculation of the inertia tank:
Pellet boilers are recommended to
have an inertia tank of 20l per kW.
Notes:
-
TA
the boiler can be used, with the application of a generic external control
(chronothermostat) or another type of control provided that it is voltage-free
(dry contact). Note: The external control normally comes with a manual. The
thermostat must have a 1 to 2°C hysteresis;
-
The parameter for operation of the room thermostat in this hydraulic scheme
is
A01= 03
;
-
The first activation has to be done manually on the display;
-
S1
boiler temperature probe;
-
P1
pump incorporated in the boiler;
-
P2
3-way motorised valve;
-
P3
installation pump.
To connect the inertia tank probe S2 to the boiler and S3 domestic hot water to the
boiler, proceed as follows:
1. The boiler must be in the Off position.
2. Disconnect the boiler from the mains supply.
3. Connect probe S2 and S3 at the rear of the boiler.
4. Reconnect to the mains supply.
5. The electronics will give an error (Er56) because it will have recognised the
changes in the hydraulic installation.
6. Unlock the error and the electronics will automatically recognise the new
configuration.
P1
S2
S1
P3
S3
P2
TA
