Eco Hometec EC 16kW Installation & User's Instructions - page 47
29. Commissioning
29.1
Electrical Checks
A “Preliminary Electrical System Check”
should be carried out to ensure earth
continuity, short circuit, polarity and
resistance to earth using a suitable multi
meter.
29.2
Gas Supply
Check the gas installation and purge the
supply in accordance with current Gas
Safety Regulations.
The gas valve fitted to the boiler is
not designed to withstand pressures in
excess of 60 mbar. When carrying out the
pressure test on the service pipe-work it is
essential that the gas cock fitted to the
boiler is in the closed position, failure to do
so will result in serious damage to the
boiler.
If using LPG, care should be taken to
ensure that the storage tank has been
correctly vented.
29.3
Connection to Pipe-work
The boiler is a low water content unit. When
connecting to an existing installation it is
important that old system deposits are
removed and are not allowed to
contaminate the appliance.
29.4
Water Treatment
In order to protect and prolong the working
life of the appliance, it is important the
general condition of older systems is
carefully considered.
The removal of debris, flux residue, grease,
metal swarf etc. from new systems and any
rust , black magnetic iron oxide sludge and
lime-scale from old systems is essential.
Consider high pressure flushing to remove
all debris in badly contaminated systems.
Fit in-line filters for full protection. All
installations should be treated and
maintained with Fernox MB1 at a
concentration of 4%.
29.5
Flushing System Pipe-work
Before the final flow and return connections
are made to the boiler, the system must be
thoroughly flushed.
Ensure that all radiator valves are open.
Flush the system with clean water until the
discharge runs clear.
Make good final connections to boiler.
29.6
Filling and Venting the System
Using a suitably approved filling loop
connected to the incoming mains cold water
supply, fill the system.
The correct filling pressure is between 1 and
2 bar.
Depending on the type of unit, the following
steps must be completed:
Venting is achieved automatically after
switching on the appliance or after a reset.
The boiler control has a special start-up
programme for venting the unit.
This programme is started when the unit is
powered for the first time and there is a heat
demand present. This start-up venting
programme takes 1 minute to complete.
This feature however does not remove the
need for traditional venting techniques and
the following venting procedure should be
completed in all cases.
The boiler has a manual bleed valve located
on the top right hand side along with a short
piece of clear plastic hose. Open the
manual bleed valve and run water into hose
pipe until air bubbles stop.
All the air should be vented via this point.
If necessary, this bleeder can be replaced
with an automatic air vent.
Check the filling pressure of the unit shortly
after start-up, add water if necessary in
order to maintain the correct pressure.
Filling is only complete when the boiler, and
the heating system are completely vented.
EC 16~38 Installation Manual page47