5
First lighting
Note:
– Heating Units GAVINA incorporate a burner
whose fi rst lighting takes place 6 minutes after
receiving voltage.
Later ignitions are almost instantaneous.
– Check the pump for correct operation and
unlock it, if necessary, by pressing a screwdriver
into the slot on the shaft-end and at the same
time, turn it.
– Check the burner for correct operation.
– Check that there are no fl ue gas leaks and that
radiators reach the required temperature.
Central Heating Service
G AV I N A G T a n d G T- F C o n fo r t
models
During demand for heating:
– The “radiator” symbol fl ashes slowly.
– The burner runs until the boiler temperature
equals the temperature setpoint for heating
(factory set at 70 °C).
– The pump runs if the boiler temperature is
higher than the programmed Min. Heat. Temp.
and does not work when its value is lower than
the Min. Heat. Temp. –7 °C.
When demand for heating stops:
– The “radiator” symbol is fi xed.
– The burner does not operate.
– The pump runs until the boiler temperature is
equal to or lower than the Min. Heat. Temp. or
two minutes after burner shut-down.
Domestic Hot Water Service Only
GAVINA GTI Confort and
GAVINA GTI-F Confort models
The burner runs for the boiler water temperature
set-point to reach that set for domestic hot water
+15 °C. The 3-way valve it remains closed into
heating installation.
During demand (draw-off):
– The “tap” symbol will fl ash slowly.
– The circulating pump will cycle so that the DHW
mean temperature is very close to the set-point
for this service.
When demand (draw-off) fi nishes:
– The “tap” symbol stops fl ashing.
– The pump will not run.
– The 3-way valve remains closed.
Domestic Hot Water Service Only
GAVINA 26 GTA Confort and
GAVINA 26 GTA-F Confort models
– The “tap” symbol in the top screen is permanently
ON.
1 – With no production of Domestic Hot Water
(no “Domestic Hot Water” programme or with
the cylinder water hot):
– The “tap” symbol in the screen is
permanently ON.
– The burner and pump are not working,
except for maintenance purposes.
2 – With Domestic Hot Water production
(“Domestic Hot Water” programme or with
the cylinder water not hot):
– The “tap” symbol fl ashes slowly. Production
of hot water begins when the cylinder
water temperature drops 2 °C below the
set-point (the factory setting is 60 °C) and
stops when the cylinder water reaches the
set-point temperature.
– The boiler water is adjusted to reach
80°C.
The pump will only run the fi rst time provided the
boiler water temperature is 5 °C higher than that
in the DHW cylinder and the boiler temperature
> Min. Heat. Temp.
Combined Central Heating and DHW
Service
GAVINA GTI Confort and
GAVINA GTI-F Confort models
When relighting after a long period of non-use, the
DHW sensor reveals insuffi cient heat. No matter
which service mode has been selected, the burner
will take priority over Domestic Hot Water, the
“tap” symbol will fl ash and the “radiator” symbol
will be permanently ON. Following the fi rst stage
of operation, and as long as there is demand
for domestic hot water, the operating mode will
coincide with that mentioned in the previous
section, excepting that the “radiator” symbol will
also show in the top screen (2). (Fig. 1).
When demand for domestic hot water only stops
(but not for Heating):
– The “radiator” symbol will fl ash slowly and the
“tap” symbol will remain permanently ON.
– The burner will run until the boiler temperature
reaches the Heating set-point.
– The pump will start running in order to deliver
water to the Heating circuit when the 3-way
valve is energized and will open when the
boiler temperature rises above the Min. Heat.
Temp; and it will stop running when the Min.
Heat. Temp. drops below –7 °C (the 3-way valve
remains open).
When demand for Heating ends, the “radiator”
and “tap” symbols will stop fl ashing. The pump
will stop running and the 3-way valve will close.
The boiler temperature set-point will remain at
the temperature set-point selected for Domestic
Hot Water +15 °C.
N.B.
With GAVINA units featuring instantaneous DHW
production (GTI models), whenever the power
supply to the boiler is to be isolated, proceed
as follows:
First, set the boiler on «Stand-by» by pressing .
Second, turn off the power supply.
Combined Central Heating and DHW
Service
GAVINA 26 GTA Confort and
GAVINA 26 GTA-F Confort models
Both the “radiator” and “tap” symbols are
displayed.
When the unit starts operating, the water in the
boiler is cold. The “tap” symbol fl ashes and the
“radiator” symbol is permanently ON.
During demand for Domestic Hot Water, operation
will coincide with that described under “Domestic
Hot Water Service Only”.
When demand for Domestic Hot Water only stops
(but not for Heating):
– The “radiator” symbol will fl ash slowly, but not
the “tap” symbol.
– The burner will run until the boiler temperature
reaches the Heating set-point value.
The pump will start running when the boiler
temperature rises above the Min. Heat Temp.
and will stop running when the Min. Heat. Temp.
drops below –7 °C.
When demand for Heating ends, the “radiator”
and “tap” symbols will stop fl ashing. The burner
will stop running, but pump will continue to run for
one minute or until the boiler water temperature
drops below the Min. Heat. Temp.
Cleaning
The cleaner the boiler, the lower fuel consumption.
General cleaning should be carried out by a
qualifi ed professional whenever necessary, but at
least once a year. In this chapter we list the most
usual operations.
If it is to be installed in the kitchen embedded in
the furniture under the countertop, the assembly
should be designed in a way, that this countertop
could be easily demountable, for easy access to
the smoke exhaust pipes and the chimney, for
cleaning of these items.
– Isolate the power supply to the boiler.
– Close the fuel inlet valves to the burner.
– Raise and remove the top casing panel (3)
(Fig.2) which is secured to the sides by means
of four clips, in order to have access to the lid
of the draught hood.
– Pull the door casing panel (4) Fig. 2, which is
pressure-fi tted to the top of the sides by means
of two clips, disengage it from the bottom
supports and remove it.
– Remove the burner (5) Fig. 2 by detaching it
from the boiler, taking care not to damage the
fuel or electrical connections.
– Remove the fl ue access cover (6) Fig. 3, by
inscrewing the three screws which hold it.
– Remove the turbulators (8 and 9)from the fl ues
(7) and clean them. Fig. 4.
– Clean the fl ue pipes with the brush provided.
– Remove the residue resulting from cleaning the
combustion chamber, using a vacuum cleaner;
as well as any sediment -through the handhole
provided (optional)- which may have settled at
the base of the chimney.
– Repeat the operations described, in reverse order.
Please take special care when installing back the
lid of the draught hood (6) fi g. 3, as it has to be
perfectly tight against the combustion gases.
Important:
The smoke turbulators (8) are made of stainless steel
and they are located around the boiler outlet fl ue pipe.
The rest of turbulators are made of carbon steel and they
are located in the rest of the boiler outlet smoke holes.
Maintenance
Maintenance operations must be performed
by specialized personnel, in accordance with
current regulations. They comprise, at least, the
following steps:
– At the end of each heating season or before
a long period of non-use, the boiler must be
thoroughly cleaned without letting soot harden.
– Carry out, at least once a year, the operations contained
in the instructions which come with the burner.
– A “combustion analysis” should be performed
once a year, when the boiler is clean. When
appropriate, carry out the necessary adjustments
to suit current standards and regulations.
– Clean the chimney at least once a year.
– All regulation, control and safety devices must be
checked for correct operation at least once a year.
– Any modifi cation and/or replacement of cables
and connections, excepting those for the room
thermostat, should be performed by
BAXI
Service Technician.
Important recommendations
– In case of long periods of non-use, the
installation must not be emptied.
– Water should be added to the system only when
it is absolutely necessary.
– Frequent adding of water may give rise to lime scale
build-up in the boiler, causing serious damage,
and at the same time reducing effi ciency.
Note:
Specifications and performance qualities are
subject to change without notice.
CE Marked
The GAVINA Confort Heating Units comply
with the European Directives 2004/108/EEC
on Electromagnetic Compatibility, 2006/95/
EEC on Low Voltage, 92/42/EEC on Effi ciency
and 97/23/EEC Pressurized Equipments.
