2.1
BOILER TECHNICAL DATA
Table 2-1:
Boiler technical data
Units
Internal and Internal System
21
26
36
Water content
litre
19
19
21
gal
4.2
4.2
4.7
Weight (dry)
kg
130
130
144
lb
287
287
318
Maximum heat output (Kerosene)
kW
21
26
36
Btu/h
71,700
88,700
123,000
Minimum flow rate (∆T=10°C)
l/h
1,800
2,200
3,000
Minimum flow rate (∆T=20°C)
l/h
900
1,100
1,500
Condensate connection
22 mm (only connect plastic pipe)
Flue diameter (conventional)
mm
100 mm (4 inches)
Waterside resistance ∆T=10°C
mbar
26
Waterside resistance ∆T=20°C
mbar
9.5
Maximum static head
m
28
Minimum circulating head
m
1
Boiler thermostat range
°C
65 to 75
Limit (safety) thermostat shut off temperature
°C
110 ±3
Maximum hearth temperature
°C
Less than 50
Electricity supply
~230V 1ph 50Hz 5A fused
Burner motor power
Watts
90
Absorbed motor power
kW
0.15
Starting current
Amps
2.0
Running current
Amps
0.85
Oil connection
¼” BSP male (on end of flexible fuel hose)
Conventional flue draught
mbar
Minimum: 0.087 - maximum: 0.37
in wg
Minimum: 0.035 - maximum: 0.15
Maximum operating pressure - sealed/open system
bar
2.0
Maximum operating pressure - pressure relief valve
bar
2.5
Boiler type
ON/OFF
2.2
SEALED SYSTEM DATA
Table 2-2:
Sealed System Data
Internal System 21, 26 and 36
Heating system pressure (cold)
Maximum 1.0 bar | Minimum 0.5 bar
Operating pressure of pressure relief valve
2.5 bar
Expansion vessel size (pre-charged at 1 bar)
12 litres (21 & 26) | 16 litres (36)
Maximum heating system volume (including boiler)*
128 litres (21 & 26) | 170 litres (36) **
Cold water mains connection
15 mm copper pipe
Pressure relief valve discharge connection
15 mm copper pipe
* Based on vessel charge and system cold fill pressure of 0.5 bar
** Approximately
Section 2: Technical Data
Page 6
2 TECHNICAL DATA