MAINTENANCE AND
SERVICE GUIDE
System II 80 and 100
Central Heating
Fanned Flue Boiler
Dimensions
Technical data
Heat input C/H System 80 : 11.73 to 28,70 kW
System 100 : 15.43 to 34.50 kW
Heat output C/H System 80 :
9.50 to 24 kW
System 100 : 12.50 to 28 kW
Max. operating pressure C/H circuit : 2.5 bar
Expansion vessel net capacity :
5.4 l
Expansion vessel initial pressure : 0.7 bar
Electrical consumption : 150 w
Voltage : 230 v
Electrical protection index :
IP24
Fuses : 2 A and 1.25 A
Gas category : II 2E+ 3+
Nominal gas flow rate at 15°C and 1013 mbar BRITONY System II 80 BRITONY System II 100
Maximum Minimum Maximum Minimum
power kW power kW power kW power kW
-Natural gas ( G 20) at 20 mbar 2.74 m
3
/h 1.22 m3/h 3.34 m3/h 1.57 m3/h
-Butane gas ( G 30 ) at 28 mbar 2.04 kg/h 0.91 kg/h 2.45 kg/h 1.17 kg/h
-Propane gas ( G 31 ) at 37 mbar 2.00 kg/h 0.89 kg/h 2.42 kg/h 1.15 kg/h
Injectors and gas valves seat diameter
BRITONY System II 80
BRITONY System II 100
Natural gas
Butane or Propane
Natural gas
Butane or Propane
-Blue solenoid restrictor diameter 2.60 mm 1.75 mm 2.90 mm 2.00 mm
-Gas valve restrictor diameter 6.70 mm 4.90 mm
no restrictor required 6.70 mm
-Manifold injectors (16) 1.23 mm 0.70 mm 1.26 mm 0.76 mm
I Safety valve outlet
J Heating flow
L Gas supply
N Heating return
Sizes in mm
Flue types:
C 12 or 42: horizontal
C 32 xx: vertical concentric
C 32 xy: Twin flue
Boiler outer case dimensions :
- Height : 850
- Boiler width : 440 (minimum space required 450)
- Depth : 380
c
Pump and expanssion vessel characteristics
P
ression disponible
Débit mini (robinets thermostatiques fermés)
Débit
1100
100 200 300
400
500
600
700 800
900
1000
0
1
2
3
4
5
l
/h
2
1
m
CE
Components location
bar
0
1
3
4
1. CH Flow isolating valve
3. Gas service tap
5. CH Return isolating valve
7. Pressure relief valve
8. Chassis
9. Connecting tails (x 3)
1
3
5
7
8
9
2
N
ote : The system initial pressure should be over the following value :
System static height (in metre) + 0.7 = Initial pressure (in bar)
1
0
1 = by-pass closed
2 = by-pass open
Head available / flow
10. Steel chassis complete with
expansion vessel
11. Sealed chamber
12. Expansion vessel (not visible)
13. Overheat thermostat
14. Electrical box
15. Two position selector switch
17. Heating flow temperature
adjustment
18. CH pressure gauge
20. Green indicator - Power ON
21. Orange indicator - Burner ON
22. Red indicator - Lock out / fl
ame
failure
23. Reset button
24. Multigas burner comprising:
-25. 16 burner head
-26. Manifold
-27. 2 Ignition electrode
-28. Ionization electrode
29. Gas section comprising:
-30. Security valve (grey)
-31. 1/3 gas stage (blue)
-32. 2/3 gas stage (black)
33. Right hydraulic assy
34. Left hydraulic assy
35. Pump
36. Air separator
37. Heating thermistor
39. Combustion chamber made of
aluminium coated steel with 4
ceramic fi
bre panels to insure
heat insulation
40. Copper main exchanger
43. Connecting bracket
45. Heating flowstat
46. Flue hood
47. Adjustable by-pass
49. Air Pressure switch
50. 45° elbow including venturi
51. Fan
K. Flue kit fixing point (refer to kit
manual)
P
UMP HEAD AVAILABLE
Minimum flow rate (with all heating thermostatic valves closed)
mCE
F
low
FUNCTIONING
COMPONENTS LOCATION
Switching on
1) Check that the gas service tap is opened at the gasmeter and
m
ain power is on.
2) Check that pressure in central heating system is above 0.7 bar
and below 2.5 bar with the pressure gauge
18.
3) Open the gas tap
3 by turning from right to left.
4) The boiler is now ready to use.
Central Heating
1) Turn selector switch 15 fully clockwise to position The green
"power on" indicator will light
20.
2) If the room thermostat (if fitted), the boiler temperature control
and the clock (if fitted) are all calling for heat, the orange
"burner on" indicator
21 will light and the heating will be on.
Note: If the boiler has been turned off for some time the fi
r
st
attempt to light it may result in a lockout .
22 If this happens
press the reset button 23 and the boiler will light.
Control panel
BRITONY SYSTEM FUNCTIONAL DIAGRAM
C
23
22
18
21
2017
15
3
50
47
45
51
49
43
40
39
37
34
36
35
29
32 30
31
28
27
24
14
13
12
1
3
5
7
4
9
12
40
11
3
9
36
29
26
51
24
50
46
10
33
45
35
13
34
14
25
K
C
entral Heating
To be able to supply heating, the main switch 15 must be
turned fully clockwise to position. This will be confirmed
b
y the green indicator light
20.
When there is a demand for heating (either from the room
thermostat or the external programmer) and the boiler temp
erature control is calling for heat. The pump starts and at a
flow rate of 4 ltr/min the central heating flow switch operates
allowing the ignition sequence to begin.
T
he first stage solenoid
31(
blue) and security solenoid 30
(grey) open together to allow gas to the burner.
The ignition sequence begins and a continuous high speed
spark ignites the gas. As soon as a flame is detected the
orange indicator bulb
21 will light.
After 45 seconds the second stage solenoid
32 (black) opens
to allow the full gas rate.
If a flame is not detected, after 8 seconds, the security solenoid closes and shuts off the gas
The red lockout indicator bulb
22 Fig. 6 will light.
The central heating flow temperature is controlled by the central heating control thermistor
37.
The boiler has been designed to minimise cycling and will not
attempt to relight for at least 3 minutes after the boiler thermostat has been satisfied If used with a cylinder, the delay
must be set to 20 seconds (refer to adjustments on control
PCB).
When the room thermostat is satisfied the burner will switch
off and the pump will remain running for a further 3 minutes
before it too stops..
NB
It is possible to override the 3 minute delay by pressing the
R
ESET button
2
3
Lock out procedure
Flame disappearance :
W
hen the ionisation electrode 28does not detect flame pres-
ence, the orange indicator lamp
21 extinguishes.
A lighting cycle starts.
I
f a flame is not detected before 8 seconds, the grey security
solenoid
30 and the blue 1/3 solenoid 31 will close.
The lock out red indicator
22 lights, the pump 35 runs.
A
fter a few seconds, it will become possible to reset the boil-
er by pressing the reset button
23.
Overheat detection :
If an overheat is detected by the sensor 13, the grey security
solenoid
30 and the blue 1/3 31 closes, the orange indicator
lamp
21 extinguishes.
The ignitor is energised for 8 seconds (*) and the red lockout
indicator
22 lights.
(*) If the burner cannot relight the boiler will go to lockout.
4
Plug for main power and Room
thermostat connection
1
2 3
4
5
1. Neutral
2. Phase
3. Room thermostat live
4. Accelerator resistor
5. Common for Accelerator and room
thermostat.
WIRING
DIAGRAM
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