Worcester 12/14 Installation And Servicing Instructions page 4

Fig. 1. Cabinet and Pipework Dimensions
92mm
1
2
1. Central heating flow (22mm compression).
3. Gravity feed flow/optional air vent point (1" BSP). 4. Pressure relief discharge pipe (15mm compression).
12/14 Table 2. Electro Oil Inter B9A Burner (See Fig. 21)
Fuel Nozzle
28 Sec. Kerosene 0.40 60°ES
28 Sec. Kerosene 0.50 60°ES
15/19 Table 3. Electro Oil Inter B9B Burner (See Fig. 22)
Fuel Nozzle
28 Sec. Kerosene 0.50 60°ES
28 Sec. Kerosene 0.55 80°EH
28 Sec. Kerosene 0.60 60°ES
35 Sec. Gas Oil* 0.50 80°S
20/25 Table 4. Electro Oil Inter B11C Burner (See Fig. 23)
Fuel Nozzle
28 Sec. Kerosene 0.60 80°EH
28 Sec. Kerosene 0.75 80°EH
28 Sec. Kerosene 0.75 80°EH
35 Sec. Gas Oil* 0.60 80°S
35 Sec. Gas Oil* 0.60 80°S
* NOTE: For use on conventional flue only.
** NOTE: The flue gas temperature is measured in the gas sampling hole on the flue outlet plate. The probe should be inserted to a depth of 50mm and angled towards the flue outlet.
The temperature measured is not an absolute flue gas temperature and is for general guidance purposes only!
NOTE: The pump pressure given is for general guidance only as variations in nozzle output can be up to ± 15%. It is, therefore, essential that the air is adjusted to give the correct CO
NOTE: The nozzle type used on 28 Sec. Kerosene outputs are nozzles calibrated specifically for use with 28 Sec. Kerosene which gives less variation in nozzle output than the standard 35
Sec. Gas Oil nozzles. However, if a 28 Sec. Kerosene nozzle is not available at servicing or commissioning it is appropriate to install a 35 Sec. Gas Oil nozzle providing the output, spray
angle and pattern of the nozzle is the same as the 28 Sec. Kerosene nozzle (e.g. 0.75 80°EH may be replaced with a 0.75.80°H).
Flue Center
1
2. Central heating return (1" BSP).
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
Pump
Fuel Flow
Pressure
Rate
(p.s.i.)
Kg/h l/h
130 1.11 1.41
100 1.30 1.64
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
Pump
Fuel Flow
Pressure
Rate
(p.s.i.)
Kg/h l/h
110 1.40 1.77
115 1.59 2.01
105 1.78 2.25
155 1.80 2.12
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
Pump
Fuel Flow
Pressure
Rate
(p.s.i.)
Kg/h l/h
130 1.87 2.37
105 2.10 2.66
130 2.34 2.96
120 2.13 2.51
150 2.37 2.79
370 mm
4
Flue Gas Approx.
%CO
Temp. Air
2
(°C)** Setting
180 10.0 6.0
195 11.5 7.0
Flue Gas Approx.
%CO
Temp. Air
2
(°C)** Setting
215 10.5 8.5
225 10.5 8.75
235 11.5 9.0
235 11.5 9.0
Flue Gas Approx.
%CO
Temp. Air
2
(°C)** Setting
190 11.0-11.5 5.5
205 11.5-12.0 6.0
220 12.0-12.5 6.5
205 11.5-12.0 6.0
220 12.0-12.5 6.5
4
600 mm
4
3
2
Appliance
Input Output
kW Btu/hr kW
13.5 46,000 12
15.5 53,000 14
Appliance
Input Output
kW Btu/hr kW
17 58,000 15
19 65,000 17
21.5 73,000 19
21.5 73,000 19
Appliance
Input Output
kW Btu/hr kW
22.5 77,000 20
25 86,000 22.5
28 96,000 25
25 86,000 22.5
28 96,000 25
Btu/hr
41,000
48,000
Btu/hr
51,000
58,000
65,000
65,000
Btu/hr
68,000
77,000
85,000
77,000
85,000
value.
2