Alpha CD24 - Page 4

4
Alpha CD24/32 - Technical Data
Fig. 1
850 mm
450 mm
345 mm
380 mm
22 mm
2.5 L
3.0 L
100 mm
60 mm
Case Dimensions Height
Width
Depth (CD24)
Depth (CD32)
Gas Connection
Primary Water Content CD24
CD32
Air Duct Diameter
Flue Duct Diameter
2.5 GENERAL 2.6 ELECTRICAL
Supply
External Fuse
Power Consumption CD24
CD32
Internal Fuse
Electrode Spark Gap
230/240 V ~ 50 Hz
3 A
130 W
140 W
F2 A
3 - 4 mm
2.7 FLUE LENGTHS
CD Easy-Flue 500 mm with terminal and 90° bend. A CD Easy-Flue 1000 mm with terminal and 90° bend is also available.
CD 750 mm flue extensions are available.
Length of Flue Required:-
Rear Flue = wall thickness + 170 mm (includes terminal)
Side Flue = wall thickness + distance between wall and side of boiler + 230 mm (includes terminal)
Vertical Flue = distance from top of boiler side panel to required roof position minus 1 m for vertical terminal assembly
Maximum horizontal flue length = 12 m.
Maximum vertical flue length including terminal is 15 m.
Each additional CD 90° Bend is equivalent to 1.3 m of flue length.
Each CD 45° Bend is equivalent to 0.9 m of flue length.
The CD Vertical Flue terminal assembly is equivalent to 1 m of flue length.
2.8 AVAILABLE PUMP HEAD FOR CENTRAL HEATING
gal/min
3.7
2.8
2.3
1.8
0.7
Btu/h
86 700
64 000
53 000
42 200
18 100
kW
25.40
18.70
15.60
12.35
5.30
Output (50/30°C) Available pump head
metres
2.3
3.5
3.8
4.0
4.6
feet
7.6
11.6
12.6
13.2
15.2
litre/min
16.6
12.6
10.5
8.3
3.2
20°C 20°C
Flow rate
This information is based on 20°C system design temperature difference.
Note: For outputs upto 28 kW refer to section 3.7.
Boiler terminal block
1. Ensure wires are connected
correctly
2. Only fit the Alpha recommended
clock. Other clocks could cause
damage.
WARNING
Blue
Wire
Brown
Wire
Red
Wire
12345
Internal Clock Terminals
Red
Wire
Not
Used
Clock connections
2.9 ELECTRICAL CONNECTIONS
Note: This Appliance Must Be Earthed
An optional integral Clock kit (CD24C and CD32C only) is available if required.