Commissioning And Testing; Initial Preparation; Initial Start-Up - Ariston Benchmark System A 24 RFF Installation And Servicing Instructions

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
Remove the front casing panel and lower the control panel as
described in Section 18.1 (page 41).
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 DHW S
ILLING OF THE
Close all hot water draw off taps;
Open the cold water inlet cock supplied with the connection
kit;
Slowly open each draw off tap and close them only when
clear water, free of bubbles, is visible.
G S :
AS UPPLY
Inspect the entire installation including the gas meter and test
for soundness. The entire installation should be in
accordance with the relevant standards. In GB this is BS
6891 and in IE this is the current edition of I.S.813.
The connection on the the appliance is a 15mm copper tail
located at the rear of the gas service cock (39 Fig. 2 - page
5)
If the gas supply serves other appliances, ensure that an
adequate supply is available both to the boiler and the other
appliances when they are in use at the same time.
Pipe work must be of an adequate size. Pipes of less than
22mm should not be used.
Open the gas cock (supplied with the connection kit) to the
appliance and check the gas connection on the appliance for
leaks.
W T :
ATER REATMENT
The boiler is equipped with a stainless steel heat exchanger.
32
initiative. In
:
YSTEM
:
YSTEM
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 on 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 with the power off, and
flush through cold, fill the central heating system again,
adding a flushing detergent, run the boiler on central heating
until it reaches its operating temperature and flush the
system, 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
The checks to be run before initial start-up are as
follows:

14.2 Initial start-up

1. Make sure that:
- The screw on the automatic air valve has been loosened
when the system is full;
- CAUTION: It is very important to fully bleed the main heat
exchanger of air when filling the boiler.
You must continue to bleed the heat exchanger from the
manual vent 24 (on the top of the heat exchanger), and
pump through the automatic air vent 18 fig.6, through
several central heating and hot water cycles to ensure the
air is fully bled from the system.
Close the manual vent after bleeding.
24
- 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 27
(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 has
been bled from the system;
- Loosen the cap on the head of the pump to eliminate any
air pockets;
- Repeat the procedure for bleeding the radiators of air;
- Open the hot water taps for a short period;
- Check the system pressure and , if it has dropped, open
the filling loop again to bring the pressure back up to 1.5
bar;
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