34. Handing the boiler over
34.1
Customer Familiarisation
Before leaving the installation, it is
important to familiarise the customer with
the operating principles of the boiler. Their
attention should also be drawn to the safety
precautions.
Familiarise the customer with the control
panel layout.
35. Annual Servicing
It is a condition of the boiler
warranty that all servicing and maintenance
be carried out annually by eco hometec
approved engineers only. When the word
[SERVICE] is displayed in the LCD display
on the control panel, a full service of the unit
is required.
A service has to be carried out when :
The appliance tells so by the LCD that
inspection is needed;
Every 12 months
Before maintenance is started the appliance
has to be inspected.
35.1
Service Inspection
The following is the eco hometec approved
service schedule:
Interview with the user about possible
problems or complaints with the appliance
or it’s use. The remarks of the user should
be taken seriously and the reason for any
complaints or anomalies should be found
and rectified.
Check the water pressure of the system.
System pressure of the installation should
be between 1 and 2 bar; any cause for
pressure loss should be found and rectified.
Lift the casing of the boiler and inspect all
pipes for water leaks or water damage.
Sweating joints or leaks should be repaired
immediately.
Inspect the top of the boiler for water-leak or
traces or evidence of water leaking from
the 125mm air inlet tube or the automatic air
separator.
The cause of any water or moisture entering
the boiler through the 125mm air inlet tube
should be found and rectified. Check the
air and flue duct for proper alignment, and
the air and flue duct terminal.
Set the appliance burning at maximum
output and measure the CO
2
. Adjust the
maximum setting of the gas valve as
required.
Set the appliance burning at medium output
and measure the CO
2
. Adjust the setting of
the gas valve as required.
Pay attention to the sound of the circulator.
Check for air in the shaft and vent if
required.
For the comibi ‘S’ boilers, measure by a
fully-opened tap, the flow rate and the
temperature of the DHW. If the flow rate is
less than 9 litres/min check the mains cold
water supply. If the mains pressure is not
the cause, the flow restrictor needs to be
checked for blockages. If the flow restrictor
is clean then there could be calcium in the
AQUA-BOOSTER. The AQUA-BOOSTER
needs to be replaced. Due to it’s
construction, cleaning of the heat
exchanger is not possible, one might think it
is, but experience has shown that after
cleaning, the lifetime of the component is
very short, making cleaning uneconomical.
Check, during hot water supply, the
temperature of the flow to the central
heating system. If during the hot water
cycle the flow to the c/h system goes up in
temperature, this indicates that the three-
way valve has an internal leak and needs to
be cleaned. The boiler needs to be drained
and the three-way valve can be
dismounted.
Remove the ignition cable and then
disconnect the fan. Take off the burner by
removing 6 x M6 nuts. Check the inside of
the heat exchanger, look for any
irregularities. When the SPIRANOX main
heat exchanger has dirt on the inside of the
elements, clean with a hard brush (no
steel), or with lemon acid. Afterwards use a
vacuum cleaner to remove all the dirt.
The
burner itself should never be cleaned.
Page 54
eco hometec (uk) ltd.
