3
3. Technical Data
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
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.
SPECIFICATIONS
Model
12/14
15/19
20/25
POWER SUPPLY
230V 50 Hz
230V 50 Hz
230V 50 Hz
IP RATING
IP 20
IP20
IP 20
HEATING FLOW
22mm
22mm
22mm
HEATING RETURN
1 in. BSP
1 in. BSP
1 in. BSP
FUEL LINE
10 mm Compression
10 mm Compression
10 mm Compression
FLUE REQUIREMENT
CF
100 mm (4 in.)
100 mm (4 in.)
100 mm (4 in.)
RS Balanced Flue Kit (Sec. 7.3) Balanced Flue Kit (Sec. 7.3) Balanced Flue Kit (Sec. 7.3)
HEARTH TEMPERATURE
Below 100°C
Below 100°C
Below 100°C
MAXIMUM STATIC HEAD
30 m (98 ft.)
30 m (98 ft.)
30 m (98 ft.)
PRIMARY WATER CAPACITY
20 litres (4.4 gal.)
20 litres (4.4 gal.)
23.5 litres (5.2 gal.)
WEIGHT
CF
102Kg (224 lbs.)
105Kg (231 lbs.)
116Kg (255 lbs)
RS
106Kg (234 lbs.)
109Kg (240 lbs.)
121Kg (267 lbs)
HEIGHT
855 mm (33.7 in.)
855 mm (33.7 in.)
855 mm (33.7 in.)
WIDTH
370 mm (14.6 in.)
370 mm (14.6 in.)
370 mm (14.6 in.)
DEPTH
600 mm (23.6 in.)
600 mm (23.6 in.)
600 mm (23.6 in.)
BURNER
Electro Oil Inter B9 A
Electro Oil Inter B9 B
Electro Oil Inter B11C
WATER SIDE RESISTANCE
10°C Difference
7 mbar
8 mbar
18 mbar
WATER SIDE RESISTANCE
20°C Difference
3 mbar
6 mbar
12 mbar
EXIT FLUE GAS MASS FLOW
24Kg/hr
35Kg/hr
43Kg/hr
SEDBUK RATING* ( SEDBUK BAND C ) 85.3% 85.5%
85.3%
CONTROL THERMOSTAT RANGE
55°C minimum Cut In to 82°C maximum Cut Out
CONTROL THERMOSTAT DIFFERENTIAL
5°C
HIGH LIMIT THERMOSTAT BREAK POINT
100 + 0/–6°C
MANUAL RESET THERMOSTAT BREAK POINT
110 +0/–6°C
Table 1
* The value is used in the UK Government Standard Assesment Procedure (SAP) for energy ratings for dwellings.
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