Alpha CD25C Installation And Servicing Instructions page 4

2.2 SYSTEM
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.)
2.3 COMPONENTS
Burner
Main Heat exchanger
DHW Heat Exchanger
Main Burner Injector
Flue - Outer Duct
Flue - Inner Duct
2.5 INSTALLATION
Min. Clearances for Servicing
(from casing)
Flue Terminal Size
Flue Terminal Protruding
Hole Size Required For Flue Assy.
Lift Weight
2.7 PERFORMANCE
SEDBUK Rating
NOx Classification
%CO
Boiler Model
Min.
CD25C 9.0
CD28C 9.1
CD35C 9.0
Alpha CD25C/28C/35C - Technical Data
4
2.5 bar
0.5 bar
82°C
3 bar (44 PSI)
8 L at 0.8 bar
22 mm
22 mm
15 mm
1.0 bar
82°C (180°F)
Stainless steel
Stainless steel
Stainless Steel
CD25C 5.2 mm
CD28C 5.4 mm
CD35C 8.5 mm
White
Plastic
Top 235 mm
Bottom 250 mm
Sides 5 mm
Front 450 mm
100 mm Dia.
100 mm
110 mm Dia.
CD25C 43 kg
CD28C 44 kg
CD35C 45 kg
Band 'A'
5
content (± 0.2%)
2
Natural Gas
CH Max. DHW Max.
9.4 9.4
9.3 9.3
9.3 9.3
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
Outlet Water Temp. (Approx. max.)
2.4 ELECTRICAL
Supply
External Fuse
Power Consumption
Internal Fuse
Electrode Spark Gap
Electrical Enclosure Degree of Moisture Protection
2.6 GENERAL
Case Dimensions
Depth (with Jig)
Gas Connection
Primary Water Content
Air Duct Diameter
Flue Duct Diameter
8 bar
0.2 bar
2.5 l/min
15 mm
15 mm
CD25C 0.2 L
CD28C 0.26 L
CD35C 0.32 L
62°C (144°F)
230/240 V ~ 50 Hz
3 A
130 W
F2 A
3 - 4 mm
IPX4D
Height 720 mm
Width 440 mm
Depth 300 mm
340 mm
22 mm
CD25C 2.5 L
CD28C 2.8 L
CD35C 3.2 L
100 mm
60 mm