C&M Britony System II Plus 80 Nat, Инструкция по эксплуатации

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9
The boiler is suitable for sealed systems only. The
maximum working pressure for the appliance is 3 bar. All
fittings and pipework connected to the appliance should be
of the same standard.
Flushing and Water Treatment
The performance of the appliance could be impaired by
system debris or the effects of corrosion. The system must
be flushed thoroughly to remove metal filings, solder,
machining oils and other fluxes and greases before
connecting the boiler. An appropriate flushing and
descaling agent should be used, particulary if it is an
existing system. Refer to BS 7593 (1992) for guidance.
For more information on the use of corrosion inhibitors,
flushing and descaling agents, advice can be sought from
the manufacturers of water treatment products such as:
Betz Dearborn Ltd
Foundry Lane
Widnes
Cheshire
WA8 8UD
Tel: 0151 424 5351
Fernox Manufacturing
Britannica Works
Clavering
Essex
CB11 4QZ
Tel: 01799 550811
System Controls
The boiler is electrically controlled and is suitable for most
modern electronic time and temperature controls.
The addition of such external controls can be beneficial to
the efficient operation of the system.
The boiler connections for external controls are 230V and
so only controls of 230V or that have voltage free contacts
should be used.
By pass and Pump
The boiler is fitted with a pre-adjusted by pass. Although
adjustment is not normally necessary, the by pass can be
reset by turning screw (
D Fig. 18 ) anticlockwise to open
the by-pass using the chart below for guidance.
If used on a system with thermostatic radiator valves, the
flow rate with the thermostatic valves closed should be
adjusted to at least 300 l/hr.The chart below indicates the
residual head of the pump available for the system.
Expansion Vessel
The expansion vessel is pre-charged to 0.7 bar (10 lb/in2).
The vessel is suitable for systems up to 145 litres
capacity. For systems of greater capacity an additional
expansion vessel will be required. Refer to the chart below
and BS 7074 pt 1 or BS 5449.
Filling Point
Provision must be made to be able to charge the system
on commissioning and to make up any subsequent
pressure loss.
The method of connection must utilise approved
equipment and must comply with the water regulations. A
filling loop can be so installed as to be hidden beneath the
boiler.
Fig. 19
Débit mini.
m CE
5
4
3
2
1
0
300 400 500 600 700 800 900 10001100 l/h
200 100
0
(robinets thermostatiques fermés)
G VF
G VO
2T
4T
Head and flow rate available
m H2O Minimum flow rate
bar
0
1
3
4
D
Fig. 18
20 40 60 80 100 120
Pf
140 160 180 200 220 240
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
1,5
1,6
1,7
1,8
1,9
2,0
Capacité maximale de l'installation (en litres)
80
°
C
70
°
C
60
°
C
50
°
C
40
°
C
260
Pression à froid pour le circuit chauffage (en bar)
Litres
Pressure
System capacity chart
Fig. 20
System Guidance