3 Technical description
3.1
General description
Wall-hung gas condensing boilers
4
High efficiency heating.
4
Low pollutant emissions.
4
Top of the range electronic
DIEMATIC iSystem
control panel
4
Installation and connection facilitated by the mounting frame
delivered with the appliance.
4
Flue gas discharge via a forced flue, chimney, bi-flow or 3CE type
connection.
4
MCA 15 - MCA 25
: Heating only (Possibility of producing domestic
hot water via an independent tank which has been installed
separately).
4
MCA 25/28 MI
: Heating and micro-storage domestic hot water
production.
3.2
Main parts
1
Flue gas discharge pipe
2
Casing/air box
3
Outlet for measuring combustion gases
4
Mixer pipe
5
Heating flow hose
6
Áir intake silencer
7
Box for the control PCBs
8
Combined venturi and gas valve unit
9
Flow end hydrobloc
10
Safety valve outlet pipe
11
Siphon
12
Control panel
13
Shunt pump
14
Return end hydrobloc
15
Plate heat exchanger (DHW circuit) (Only on models with
domestic hot water production)
16
Inverter valve
17
Condensate receiver tank
18
Fan
19
Heat exchanger (Heating circuit)
T001867-C
2
15
14
13
16
17
18
19
20
21
3
4
5
6
7
8
9
10
11
12
1
22
MCA 15 - MCA 25 MCA 25/28 MI
3. Technical description
29/04/2010 - 300022146-001-B
11
