4.0
TECHNICAL DATA
8
Publication No. 5106451
Appliance Category
CAT I
2H
Horizontal
Flue Terminal
Diameter
110mm
Dimensions
Projection
150mm
Outercase Dimensions
Overall Height
Inc Flue Elbow
-
750mm
Casing Height
-
600mm
Casing Width
-
390mm
Casing Depth
-
320mm
Weights
kg
lb
Packaged Boiler Carton
40.7
89.6
Packaged Flue Kit
3.6
8.0
Weight Empty
38.2
84.1
Installation Lift Weight
31.5
69.3
Connections
Gas Supply
-
1
/
2
in BSPT
Central Heating Flow (HE15)
- 28mm
Central Heating Flow (HE24)
- 28mm
Central Heating Return (HE15) - 28mm
Central Heating Return (HE24) - 28mm
Condensate Drain
- 1 in BSP
Recommended System
Temperature Drop
Normal
11°C
20°F
Condensing
20°C
36°F
Heat Input
(see note)
Max
Min
15 HE
kW
16.88
10.2
Btu/hr
57,600
34,840
24 HE
kW
24.50
10.2
Btu/hr
83,600
34,840
Heat Output
(Non Condensing 70° C Mean Water Temp)
Max
Min
15 HE
kW
15.24
9.14
Btu/h
52,000
31,180
24 HE
kW
22.0
9.14
75,000
31,180
Electrical Supply
230V~ 50Hz
(Appliance must be connected to an
earthed supply)
Power Consumption
80W
External Fuse Rating
3A
Internal Fuse Rating
(BS 4265)
Fuse (2)
4 AT (Control Board)
Fuse (3)
2 AT (Ignition Board)
Max Gas Rate
(Natural Gas)
(After 10 Mins)
Btu/hr
75,000
52,000
m
3
/h
2.31
1.64
ft
3
/h
83.3
52.1
Inlet Pressure at Gas Valve
(Natural Gas)
Min
18.1 mbar
Max
22.5 mbar
(see Section 10.1)
Injector
(Natural Gas)
6.3mm Diameter
Clearances
Both Sides
5mm Min
Above Casing
200mm Min
Below Casing
130mm Min
Front (For Servicing)
500mm Min
Front (In Operation)
5mm Min
0
10
20
30
40
20
40
60
80
100
120
140
160
180
200
220
Water Flow Rate (litres/min)
Pressure Drop (mbar)
8
17
25
33
42
50
58
66
75
83
91
Pressure Drop (in wg)
Hydraulic Resistance Chart
Appliance Type
C
13
C
33
Nox Class
5
Heat Output
(Condensing 40° C Mean Water Temp)
Max
Min
15 HE
kW
16.49
10.1
Btu/h
56,260
34,520
24 HE
kW
23.8
10.1
81.200
34,520
Water Content
litres
2.6
pints
4.6
Static Head
max
30 metres (100 ft)
min
1 metre (3.25 ft)
Low Head
0.2m (8 in) min
System Detail
fully pumped open vented & sealed systems
Gas Connection
RC
1
/
2
(
1
/
2
in BSPT)
Controls
installer preset boiler thermostat, safety
thermostat, flow switch, electronic flame
sensing,temperature protection thermostat
& condensate blockage sensor
The efficiency is
Promax 15 HE - 91.3%
Promax 24 HE - 91.0%
This value is used in the UK Government’s
Standard Assessment Procedure (SAP) for
energy rating of dwellings. The test data from
which it has been calculated has been
certified by 0086.
SEDBUK Declaration For
Potterton Promax 15 HE & 24 HE