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SYSTEM fILLING/CLEANSING
Check and adjust as necessary the hot water system expansion vessel(s) air pressure
to 1.5 bar.
Check that any drain valves are closed then open the incoming stop valve and fill the
domestic mains cold and hot water systems in the normal way ensuring there is no
air trapped in the system.
In the case of the OV model fill the heating system with potable water through the
feed and expansion cistern flush and refill.
Check the water level in the feed and expansion cistern and adjust the ballvalve if
necessary.
Check the warning pipe is installed correctly, has a continuous fall and is not blocked
i.e. discharges water freely.
Check and adjust as necessary the primary heating system expansion vessel to the
figure specified (normally 1.0 bar)
Note: The expansion vessel pressures should be checked before the systems are
filled.
In the case of the SS model fill the primary heating system with potable water through
the filling loop provided adjacent to the boiler to the pressure required (normally
1.0 bar).
During filling vent air as necessary from the high points of the system including
the manual air vents provided on the appliance and on the feed to the expansion
vessel.
Check the whole of the primary heating and domestic hot and cold distribution
systems for leaks.
It is essential that all systems functions properly for optimum performance.
To achieve this, the primary system should be commissioned in accordance with good
practice and generally in accordance with the requirements of BS 6798, BS 5449 and
BS 7593.
Full details of the requirements are given in PAS 33:1999 under Section 10
Commissioning.
When using either cleansing or corrosion inhibitor chemical, the manufacturers
instructions must be followed.
Cleansing the Primary System
It is very important to ensure that the Primary system is cleaned using a suitable
cleansing agent such as Sentinel X300 or fernox Superfloc to ensure that any
flux residues/installation debris are removed.
The volumes/concentration should be calculated in accordance with the manufacturers
instructions allowing the volume for the primary coil shown in the Table in 1.2 Technical
Data.
Primary Water System Treatment
Although the Accolade 2000 has no special water treatment requirements, the radiators
and other parts of the circuit will benefit from the application of a scale and corrosion
inhibitor such as Sentinel X100 or a Protector such as Fernox MB1.
The volumes/concentration should be calculated in accordance with the manufacturers
instructions allowing the volume for the primary coil shown in the Table in 1.2 Technical
Data.
2.0 INSTALLATION
2.3 COMMISSIONING
POWERfLUSHING/CLEANING Of THE
HEATING SYSTEM
If it is proposed to 'powerflush' the heating
system always check and comply fully with
the manufacturers instructions for the
powerflushing equipment being used.
If in any doubt please consult our Technical
Helpline.
Cleansing the Hot/Cold Water System
Treatment
Fully flush and, when necessary, chlorinate the
hot and cold water system in accordance with
the recommendations in the Model Water
Byelaws and BS 6700.
Remove and clean the strainer element in the
combination inlet valve, then replace it and
re-fill the system.
Manually open the relief valves one by one and
check that water is discharged and runs freely
through the tundish and out at the discharge
point. The pipework should accept full bore
discharge without overflowing at the tundish,
and the valve should seat satisfactorily.
With the OV model once the system is
finally filled turn down the servicing valve
for the ballvalve in the f & E Cistern to the
point where the warning/overflow will cope
with the discharge arising from a ballvalve
failure.
With the SS model disconnect the manual
filling loop.
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