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TEcHNIcAL INFOrMATION
2.0
(c)
Frost protection mode
The boiler has a built in frost protection function. This function can be deactivated by removing the jumper from pins 1 & 9 on connector
J3 on the controller PCB (see section 4). When the boiler is in the frost protection mode, its status is shown on the front panel display.
If the boiler temperature drops below 10ºC, the pump is switched on and the diverter valve is moved to the central heating mode.
If the boiler temperature drops below 5ºC after switching on the pump, then the burner is switched on and modulated to minimum
power level. The burner continues to burn at minimum power level until the boiler temperature rises above 15ºC. After this the burner
is switched off and the pump continues to run for a period of 1 minute, after which the pump is also switched off.
b)
Pump protection mode
The pump is switched on for about 1 minute every 36h to prevent it sticking. To allow this to operate the electricity supply and boiler
on/off switch must not be switched off. If the property is left unoccupied unless the system has been drained off
e)
4 x 7 Segment display functions
The 4 digit display is shown and described in section 3. The individual segments of the 1st digit and the dots indicate the status of the
appliance functions. The nd, 3rd and 4th digits display the heating system pressure in bars. The push buttons are used for diagnostics
and for setting central heating flow and domestic hot water temperatures. This is described in detail in sections 3 & 6 of this manual.
2.3 TEcHNIcAL DATA (Table 2.1)
Outer case (Overall dimensions)
Casing height
Casing height including flue
Casing width
Casing depth
Minimum clearances
Above casing
Below casing
Front (In operation)
Front (For servicing)
L.H. Side
R.H. Side
Weights
Packaged boiler carton
Installation lift weight
Connections
Gas supply
Central heating flow
Central heating return
CW mains inlet
DHW flow
Pressure relief discharge
Condensate drain
Flue terminal
Diameter
dimensions
Projection
Central Heating (Primary) Circuit
Safety discharge (PRV)
setting
Maximum operating pressure
Minimum operating pressure
Recommended operating
range
CH flow temperature
(adjustable)
Integral Expansion Vessel (For CH only)
Minimum pre-chargepressure
Nominal capacity of exp.
vessel
Maximum capacity of CH
system
Water content of the boiler
(1) Adjustable but flow rate dependent
3
(2) Based on CV of 40MJ/m
Table 2.1 : Technical data
Appliance type
850 mm
Appliance category
1000 mm
Heat input – CH
( Net )
380 mm
385 mm
Heat input – CH
( Gross )
200 mm
Heat output – CH
200 mm
( Non C ondensing )
20 mm
Heat output – CH
600 mm
( Condensing )
20 mm
Heat input – DHW
20 mm
( Gross )
Heat output -
DHW
50.0 kg
Inlet pressure (Natural Gas –
G20)
45.0 kg
Max gas rate (After 10 mins )
Flue gasses mass flow rate
22mm copper
NO
Class
X
22mm copper
SEDBUK Rating
22mm copper
15mm copper
Electrical Data
15mm copper
Supply
15mm copper
Power consumption
21/22 mm
Electrical protection
plastic
100 mm
External fuse rating
125 mm
Internal fuse rating
DHW Circuit
3.0 bar
Operating pressure
2.5 bar
0.5 bar
DHW flow rate 'D' specified @
30K rise
1 – 2 bar
o
40 – 80
C
Minimum working flow rate
DHW flow temperature
0.5 bar
7.0 litres
Maximum condensate flow rate: 2.94 l/h
125 litres
Pump Characteristics:
2.6 litres
CO
at maximum
2
DHW heat input
C
, C
, C
13
33
53
I
2H
Maximum
26.3 kW
Minimum
7.5 kW
Maximum
29.2 kW
Minimum
8.3 kW
Maximum
26.0 kW
Minimum
7.4 kW
Maximum
28.9 kW
Maximum
40.0 kW
Maximum
35.6 kW
20 mbar
[2]
3
3.6
m
/h
16.21 g/s
5 (< 70 mg/kWh to EN483 )
90.7 %, A Class
230V~ 50Hz
155 W
IPX0 D
3A
F2L
Maximum
8.0 bar
Minimum
<0.2 bar
17.2 l/min
2.0 l/min
(1)
o
35 – 65
C
See figure 4.6
Case on
9.25 - 9.85%
Case off
9.05 - 9.65%
Page 10
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