Technical Data - Worcester 12/14 Installation And Servicing Instructions

re-setting the speed control knob. This is located on the pump
electrical connection block. Three pump speeds are available,
number 1 being the lowest.
Expansion Vessel
A 10 litre expansion vessel is included within the appliance
cabinet.
Pressure Gauge
A 4 bar pressure gauge is included to allow the system pressure
to be checked and set to the correct level.
Pressure Relief Valve
A 3 bar relief valve is fitted to protect the appliance during
dangerous over-pressure conditions.
Manual Reset Thermostat
An overheat thermostat is located on the underside of the
electrical control box and is accessible by removing the cabinet
front panel.
If a boiler overheat condition arises, the burner will remain
inoperative until the thermostat button is reset.
2.8 Operation
The appliance is supplied with a facia mounted operating switch

3. Technical Data

Table 1
Model
POWER SUPPLY
IP RATING
HEATING FLOW
HEATING RETURN
FUEL LINE
FLUE REQUIREMENT
HEARTH TEMPERATURE
MAXIMUM STATIC HEAD
PRIMARY WATER CAPACITY
WEIGHT
HEIGHT
WIDTH
DEPTH
BURNER
WATER SIDE RESISTANCE
WATER SIDE RESISTANCE
EXIT FLUE GAS MASS FLOW
SEDBUK RATING* ( SEDBUK BAND C )
CONTROL THERMOSTAT RANGE
CONTROL THERMOSTAT DIFFERENTIAL
HIGH LIMIT THERMOSTAT BREAK POINT
MANUAL RESET THERMOSTAT BREAK POINT
* The value is used in the UK Government Standard Assesment Procedure (SAP) for energy ratings for dwellings.
SPECIFICATIONS
10 mm Compression
CF
RS Balanced Flue Kit (Sec. 7.3) Balanced Flue Kit (Sec. 7.3) Balanced Flue Kit (Sec. 7.3)
CF
RS
855 mm (33.7 in.)
370 mm (14.6 in.)
600 mm (23.6 in.)
Electro Oil Inter B9 A
10°C Difference
20°C Difference
to allow the selection of hot water only in the upper position or
central heating and hot water in the lower position.
Domestic Hot Water Mode
The appliance primary hot water is used to heat a domestic hot
water cylinder. The water may be transported to the cylinder by
natural gravity circulation or by a fully pumped method. Control
of the system will depend on which method is used and reference
should be made to the control system manufacturers instructions.
Off
The heating system will remain off unless there is a demand via
the frost thermostat ( where fitted ) whereby the frost thermostat
will activate the pump and burner until the demand is satisfied.
The burner will remain inoperative in all other circumstances.
Central Heating and Hot Water Mode
The appliance will supply heat to the central heating system as
required. The water supplied to the central heating circuit can be
set to the desired temperature by adjusting the heating control
thermostat located on the facia panel.
12/14
230V 50 Hz
IP 20
22mm
1 in. BSP
10 mm Compression
100 mm (4 in.)
Below 100°C
30 m (98 ft.)
20 litres (4.4 gal.) 20 litres (4.4 gal.)
102Kg (224 lbs.) 105Kg (231 lbs.)
106Kg (234 lbs.) 109Kg (240 lbs.)
855 mm (33.7 in.)
370 mm (14.6 in.)
600 mm (23.6 in.)
Electro Oil Inter B9 B
7 mbar
3 mbar
24Kg/hr
85.3%
55°C minimum Cut In to 82°C maximum Cut Out
3
15/19
230V 50 Hz
IP20
22mm
1 in. BSP
10 mm Compression
100 mm (4 in.) 100 mm (4 in.)
Below 100°C Below 100°C
30 m (98 ft.)
23.5 litres (5.2 gal.)
116Kg (255 lbs)
121Kg (267 lbs)
855 mm (33.7 in.)
370 mm (14.6 in.)
600 mm (23.6 in.)
Electro Oil Inter B11C
8 mbar
6 mbar
35Kg/hr
85.5%
5°C
100 + 0/–6°C
110 +0/–6°C
20/25
230V 50 Hz
IP 20
22mm
1 in. BSP
30 m (98 ft.)
18 mbar
12 mbar
43Kg/hr
85.3%