First Lighting; Important Recommendations - baxiroca GAVINA 20 GT Instructions D'installation, De Montage Et De Fonctionnement

– The screen will alternate displaying code
11 and the 40 °C to 140 °C scale.
– Replace the thermostat with a new one.

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
GAVINA GT and GT-F Confor 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). Refer to the section
"Changing the Setpoints" in the Instructions for
CCE control panels.
– 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 is not energized and so it
remains closed into the 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 (15). (Fig. 4).
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.

Important recommendations

– Any modification and/or replacement of
cables and connections, excepting those for
the power supply and the room thermostat,
should be performed by a
Technician.
– It is recommended that the properties of the
water in the system be:
pH : between 7.5 and 8.5
Hardness: between 8 and 12 French degrees*
* One French degree is equivalent to 1 gram of calcium
carbonate per 100 litres of water.
Note:
Specifi cations and performance qualities are
subject to change without notice.
CE Marked
The GAVINA Confort Heating Units comply
with the European Directives 89/336/EEC on
Electromagnetic Compatibility, 73/23/EEC on
Low Voltage, 92/42/EEC on Efficiency and
97/23/EEC Pressurized Equipments.
.
Service
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