Commissioning And Testing; Initial Preparation; Initial Start-Up - Ariston C Operating Instructions Manual

14. Commissioning and Testing

14.1 Initial preparation

MTS (GB) Limited support the
Sections 24 and 25 (pages 60 and 61) of this manual the
Commissioning Checklist and Service Interval
Record can be found. It is important that this is completed in
the presence of your customer, they are shown how to use it,
and it is signed by them. Please instruct your customer that
they must have this manual with them whenever they contact
a service engineer or us.
Preliminary electrical system checks to ensure electrical
safety must be carried out by a competent person i.e.
polarity, earth continuity, resistance to earth and short circuit.
F H S
ILLING THE EATING YSTEM
Remove the front casing panel and lower the control panel
as described in Section 18.1 (page 45).
Open the central heating flow and return cocks supplied with
the connection kit;
Unscrew the cap on the automatic air release valve one full
turn and leave open permanently;
Close all air release valves on the central heating system;
Gradually open the valves at the filling point (filling loop) until
water is heard to flow, do not open fully;
Open each air release tap starting with the lowest point and
close them only when clear water free of air is visible;
Purge the air from the pump by unscrewing the pump
plug anti-clockwise, also manually rotate the pump shaft
in the direction indicated by the pump label to ensure
the pump is free;
Refit the pump plug;
Continue filling the system until at least 1.5 bar registers on
the pressure gauge;
Inspect the system for water soundness and remedy any
leaks discovered.
F W T
LUSHING AND ATER REATMENT
The boiler is equipped with a stainless steel main heat
exchanger.
The detailed recommendations for water treatment are given
in BS 7593:1992 (Treatment of water in domestic hot water
central heating systems); the following notes are given for
general guidance:
- If the boiler is installed in an existing system, any
unsuitable additives must be removed;
- Under no circumstances should the boiler be fired before
the system has been thoroughly flushed; the flushing
procedure must be in line with BS7593:1992.
Firstly fill the central heating system and boiler with the
power off and flush through cold, fill the central heating
system again, add a flushing detergent, whose function is
to dissolve any foreign matter that may be in the system,
and run the boiler on central heating until it reaches its
operating temperature, flush the system as instructed by
the manufacturer of the flushing detergent and refill the
system with a suitable corrosion inhibitor.
N : F
OTE AILURE TO CARRY OUT THE FLUSHING PROCEDURE WILL
RESULT IN THE WARRANTY BECOMING VOID
In hard water areas or where large quantities of water are
in the system the treatment of the water to prevent
premature scaling of the main heat exchanger is
necessary.
The formation of scale strongly compromises the
initiative. In
.
efficiency of the thermic exchange because small areas
of scale cause a high increase of the temperature of the
metallic walls and therefore add to the thermal stress of
the heat exchanger.
Demineralised water is more aggressive so in this
situation it is necessary to treat the water with an
appropriate corrosion inhibitor.
- Any treatment of water by additives in the system for frost
protection or for corrosion inhibition has to be absolutely
suitable for all the metals used in the circuit including the
aluminium alloys.
- If anti-freeze substances are to be used in the system,
check carefully that they are compatible with the
aluminium.
In particular, DO NOT USE ordinary ETHYLENE
GLYCOL, since it is corrosive in relation to aluminium and
its alloy, as well as being toxic.
MTS suggests the use of suitable anti-freeze products
such as Fernox ALPHI 11, which will prevent rust and
incrustation taking place.
Periodically check the pH of the water/anti-freeze mixture
of the boiler circuit and replace it when the amount
measured is out of the range stipulated by the
manufacturer ( 7 < pH < 8).
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE
- In under-floor systems, the use of plastic pipes without
protection against penetration of oxygen through the
walls can cause corrosion of the system's metal parts
(metal piping, boiler, etc), through the formation of oxides
and bacterial agents.
To prevent this problem, it is necessary to use pipes with
an "oxygen-proof barrier", in accordance with standards
DIN 4726/4729. If pipes of this kind are not used, keep
the system separate by installing heat exchangers of
those with a specific system water treatment.
IMPORTANT
Failure to carry out the water treatment procedure will
invalidate the appliance warranty

14.2 Initial start-up

The checks to be run before initial start-up are as
follows:
1. Make sure that:
- The screw on the automatic air valve has been loosened
when the system is full;
- If the water pressure in the system is below 1.5 bar, bring
it up to the appropriate level;
- Ensure that the gas cock is closed;
- Make sure that the electrical connection has been made
properly and that the earth wire is connected to an
efficient earthing system;
- Supply power to the boiler by pushing the on/off button
26 (Fig. 1) the green led indicator light will illuminate;
- Turn the central heating control knob 30 (Fig. 1) to
maximum and switch the time clock (if fitted) to constant
and turn up the room thermostat (where fitted);
- After 7 seconds, the boiler will signal a shutdown due to
ignition failure. Leave the boiler as it is until all the air
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