3
13.2
2.9
9.9
2.2
2.1
PERFORMANCE - NATURAL GAS
(CAT: 12H
2H - G20 - 20 mbar)
2
TECHNICAL DATA
Alpha HE CB25/33, SY25 - 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 HE CB25
Alpha HE CB25 and HE SY25
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 HE CB33
Alpha HE CB33
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
HE CB25
HE CB33
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 HE CB25/33
Alpha HE CB25/33 and HE SY25
Summary of Contents for Alpha HE CB25
Page 34: ...34 Alpha HE CB25 33 SY25 Wiring Diagrams 9 2 HE SY25 ILLUSTRATED WIRING DIAGRAM...
Page 35: ...35 9 3 HE CB25 33 FUNCTIONAL FLOW WIRING DIAGRAM Alpha HE CB25 33 SY25 Wiring Diagrams...
Page 36: ...36 9 4 HE SY25 FUNCTIONAL FLOW WIRING DIAGRAM Alpha HE CB25 33 SY25 Wiring Diagrams...
Page 39: ...39 Alpha HE CB25 33 SY25 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F...
Page 40: ...40 Alpha HE CB25 33 SY25 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to J...
Page 41: ...41 Alpha HE CB25 33 SY25 Fault Finding 10 6 FAULT FINDING SOLUTION SECTIONS K to L...
