Main Eco Compact Combi 25 Installation And Service Manual page 14

3 Technical specifications
Main Eco Compact Combi
Nominal heat input central heating — Maxi
mum rate
Nominal heat input — Minimum rate
Nominal heat output 80/60°C — domestic hot
water — Maximum rate
Nominal heat output 80/60°C — central heat
ing — Maximum rate
Nominal heat output 80/60°C — central heat
ing — Factory setting
Nominal heat output 80/60°C — Minimum
rate
Nominal heat output 50/30°C — central heat
ing — Maximum rate
Nominal heat output 50/30°C — central heat
ing — Minimum rate
Tab.6 Central heating circuit specifications
Main Eco Compact Combi
Maximum pressure
Minimum pressure
Central heating temperature adjustment (±5°C)
Expansion vessel water capacity
Expansion vessel pre charge pressure
Maximum capacity of central heating system
Primary water content of boiler (unpressurised)
Tab.7 Domestic hot water circuit specifications
Main Eco Compact Combi
Maximum pressure
Dynamic minimum pressure
Minimum working water flow rate
Specific flow rate (D)
Domestic hot water temperature range adjustment
±5°C
Production of domestic hot water with ΔT = 30°C
Production of domestic hot water with ΔT = 35°C
(1) Where low flow taps or fittings are intended to be used in the DHW system connected to the boiler, it is strongly recommended that the
DHW flow rate DOES NOT fall below 2.5 l/min. This will ensure reliable operation of the DHW function.
Tab.8 Characteristics of combustion
Main Eco Compact Combi
Natural gas rate (G20) Qmax
Natural gas rate (G20) Qmin
14
Net (Qn Hi)
Gross (Qn Hs)
Net (Qn Hi)
Gross (Qn Hs)
Pn
Pn
Pn
Pn
Pnc
Pnc
litres
litres
litres
l/min
(1)
l/min
l/min
l/min
m
m
25
kW 20.6
kW 22.9
kW 6.2
kW 6.9
kW 25
kW 20
kW 20
kW 6.1
kW 21.2
kW 6.7
25
bar 3
bar 0.5
°C 25 / 80
7.0
bar 1.0
100
2.5
25
bar 8
bar 0.5
2.0
10.2
°C 35 / 60
12
10.2
25
2.71
3
/h
0.67
3
/h
30
20.6
22.9
6.2
6.9
30
20
20
6.1
21.2
6.7
30
3
0.5
25 / 80
7.0
1.0
100
2.5
30
8
0.5
2.0
12.2
35 / 60
14.3
12.2
30
3.26
0.67