Alpha HE25 - Technical Data

3
13.2
2.9
9.9
2.2
2.1 PERFORMANCE - NATURAL GAS (CAT: 12H 2H - G20 - 20 mbar)
2 TECHNICAL DATA
Alpha HE25 and HE33 - Technical Data
MAX.
27.4
93 400
25.0
85 300
12.3
4.92
2.61
92.1
MIN.
11.4
38 900
9.9
33 800
1.9
0.76
1.09
38.5
Domestic Hot Water
Heat Input kW
(Gross) Btu/h
Output to Water kW
(modulating) Btu/h
Burner mbar
Pressure in wg
Gas Rate m³/h
ft³/h
Flow Rate at 35°C Rise L/min
gal/min
Room sealed
chamber panel
fitted
Alpha HE25
Alpha HE25
MAX.
36.6
124 800
33.2
113 300
32.0
109 200
11.6
4.64
3.49
123.2
MIN.
22.4
76 400
19.7
67 200
19.2
65 500
3.6
1.44
2.14
75.5
Room sealed
chamber panel
fitted
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (condensing) kW
(50°C/30°C) Btu/h
Heat Output (non-condensing) kW
(80°C/60°C) Btu/h
Burner mbar
Pressure in wg
Gas Rate m³/h
ft³/h
Domestic Hot Water
Heat Input kW
(Gross) Btu/h
Output to Water kW
(modulating) Btu/h
Burner mbar
Pressure in wg
Gas Rate m³/h
ft³/h
Flow Rate at 35°C Rise L/min
gal/min
Room sealed
chamber panel
fitted
Alpha HE33
Alpha HE33
MIN.
15.2
51 800
13.2
45 000
1.2
0.48
1.46
51.5
MAX.
36.6
124 800
33.2
113 300
11.6
4.64
3.49
123.2
MAX.
27.4
93 400
25.0
85 300
24.0
81 900
12.3
4.92
2.61
92.1
MIN.
16.3
55 600
14.5
49 500
14.0
47 800
4.3
1.72
1.55
54.7
Room sealed
chamber panel
fitted
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (condensing) kW
(50°C/30°C) Btu/h
Heat Output (non-condensing) kW
(80°C/60°C) Btu/h
Burner mbar
Pressure in wg
Gas Rate m³/h
ft³/h
Central Heating (Sealed System)
Max. Working System Pressure
Min. System Pressure
Max. System Temperature
Pressure Relief Valve Setting
Expansion Vessel Size (pre-charge press.)
Flow Connection
Return Connection
Relief Valve Connection
Recommended System Pressure (cold)
CH Water Temp. (Approx. max.)
2.5 bar
0.5 bar
82°C
3 bar (44 PSI)
8 L at 1.0 bar
22 mm
22 mm
15 mm
1.0 bar
82°C (180°F)
Domestic Hot Water
Max. Mains Inlet Water Pressure
Min. Mains Water Pressure
Min. DHW Flow Rate
Mains Inlet Connection
DHW Outlet Connection
DHW Water Content HE25
HE33
Outlet Water Temp. (Approx. max.)
8 bar
0.2 bar
2.5 l/min
15 mm
15 mm
0.30 L
0.35 L
62°C (144°F)
2.2 SYSTEM
Alpha HE25 and HE33
Alpha HE25 and HE33
2.3 AVAILABLE PUMP HEAD FOR CENTRAL HEATING
gal/min
3.7
3.3
2.9
2.2
Btu/h
85 300
75 000
68 200
49 500
kW
25.0
22.0
20.0
14.5
Output (50/30°C) Available pump head
metres
1.8
2.1
2.4
2.9
feet
6.0
7.0
8.0
9.6
litre/min
16.7
15.0
13.3
10.0
Flow rate
This information is based on 20°C system design temperature difference. Refer to Section 3.7, System Volume.
Alpha HE25
gal/min
4.4
3.7
3.3
2.9
Btu/h
102 300
85 300
75 000
68 200
kW
30.0
25.0
22.0
20.0
Output (50/30°C) Available pump head
metres
1.5
2.1
2.3
2.6
feet
5.0
7.0
7.6
8.6
litre/min
20.0
16.7
15.0
13.3
Flow rate
Alpha HE33