Technical Data - Worcester WM 12 Installation And Servicing Instructions

3. Technical Data

Table 1
MODEL
POWER SUPPLY
HEATING FLOW
HEATING RETURN
HEIGHT
WIDTH
DEPTH
FUEL LINE
FLUE REQUIREMENT
MAXIMUM STATIC HEAD
PRIMARY WATER CAPACITY
WEIGHT (DRY)
WEIGHT (WET)
BURNER
WATER SIDE RESISTANCE
WATER SIDE RESISTANCE
EXIT FLUE GAS MASS FLOW
CONTROL THERMOSTAT RANGE
CONTROL THERMOSTAT DIFFERENTIAL
HIGH LIMIT THERMOSTAT BREAK POINT
MANUAL RESET THERMOSTAT BREAK POINT
DUCT MANUAL RESET THERMOSTAT BREAK POINT
FROST THERMOSTAT RANGE
Fig. 1. Pipework dimensions inside the property (all dimensions are millimeters)
236 (315mm Standard)
To the inside
206 (285mm Optional)
of the pipe
end stop
12/19 Table 2. Electro Oil Inter B9C Burner (See Fig. 28)
Fuel** Nozzle
28 Sec. Kerosene 0.4 60°ES
28 Sec. Kerosene 0.5 60°ES
28 Sec. Kerosene 0.5 60°ES
28 Sec. Kerosene 0.6 60°ES
* NOTE: The flue gas temperature is measured in the flue. The probe should be inserted to a depth of 150mm in the center of the flue. 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. 0.560°ES may be replaced with a 0.560°S).
10°C Difference
20°C Difference
WALL
SIDE VIEW
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
Pump
Fuel Flow
Pressure
Rate
(p.s.i.)
Kg/h l/h
115 1.11 1.41
105 1.38 1.75
140 1.57 1.99
125 1.76 2.23
**NOTE: Class C2 28sec kerosene.
SPECIFICATIONS
315mm standard (285mm optional)
RS Telescopic (Supplied with appliance)
55°C minimum cut in to 82°C maximum cut out
100
RETURN
Flue Gas
%CO
Temp.
2
(°C)*
180 9.5
200 10.5
210 11
230 11.5
3
12/19
230V 50Hz
22mm
22mm
600mm
420mm
1 /4 inch BSP
30m (98 ft.)
6.5 litres (1.4 gal)
76Kg (167lbs)
82.5Kg (182lbs)
Electro Oil Inter B9C
40 mbar
10 mbar
33kg/h
5°C
100 +0/-6°C
110 +0/-6°C
100 +0/-6°C
5°C cut in to 10°C cut out
288
FLOW
FRONT VIEW
Appliance
Approx.
Air
Input
Setting
kW Btu/hr
7.25 13.3 46,000
8.5 16.6 56,000
8.75 18.9 65,000
9 21.1 72,000
Output
kW Btu/hr
12 41,000
15 51,000
17 58,000
19 65,000
value.
2