Alpha CD25X - 2.5 Installation Clearances and Dimensions; 2.7 Performance Data

4
CH Max
9.4
9.4
720 mm
440 mm
300 mm
340 mm
22 mm
2.5 L
2.8 L
100 mm
60 mm
Case Dimensions Height
Width
Depth
Depth (with Jig)
Gas Connection
Primary Water Content CD25X
CD28X
Air Duct Diameter
Flue Duct Diameter
2.6 GENERAL
Min. Clearances for Servicing Top
(from casing) Bottom
Sides
Front
Flue Terminal Size
Flue Terminal Protruding
Hole Size Required For Flue Assy.
Lift Weight CD25X
CD28X
2.5 INSTALLATION
235 mm
250 mm
5 mm
450 mm
100 mm Dia.
100 mm
110 mm Dia.
41 kg
42 kg
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 0.8 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 CD25X
CD28X
Outlet Water Temp. (Approx. max.)
Flow Regulator Fitted CD25X
CD28X
8 bar
0.2 bar
2.5 l/min
15 mm
15 mm
0.2 L
0.26 L
62°C (144°F)
10 l/min
12 l/min
2.2 SYSTEM
Burner
Main Heat exchanger
DHW Heat Exchanger
Main Burner Injector CD25X
CD28X
Flue - Outer Duct
Flue - Inner Duct
Stainless steel
Stainless steel
Stainless Steel
5.2 mm
5.4 mm
White
Plastic
2.3 COMPONENTS 2.4 ELECTRICAL
Alpha CD25X/28X - Technical Data
2.7 PERFORMANCE DATA
%CO
2
content (± 0.2%) Sedbuk rating
Natural Gas Efficiency
band
A
A
SAP efficiency
(%)
90.1
90.0
Min
9.0
8.9
DHW max
9.4
9.4
NOx class
5
5
Boiler model
CD25X
CD28X
Supply
External Fuse
Power Consumption
Internal Fuse - Main Terminal
PCB Fuse F1
PCB Fuse F2 and F3
Electrode Spark Gap
Electrical Enclosure Degree of Moisture Protection
230/240 V ~ 50 Hz
3 A
120 W
F2 A
315 mAT
2.5 AF
3 - 4 mm
IPX4D