USER MANUAL CENTRAL HEATING BOILER TYPE C38GC25; C38GC25-P; C38GC29; C38GC35; C38GC35-CH1; C38GC35-CH2
REV. 01.07.2019
25 din 37
When the BOILER functions with low flows, the BOILER functions continuously at the minimum charge as long as the hot water
temperature is under the threshold limit of 63°C. When the hot water temperature reaches the mentioned limit of 63°C, the
burner is closed and a new burning will happen when the hot water temperature is lower than the limit of 60°C.
When the BOILER functions with high flows, the hot water temperature will be the opposite of the hot water flow, but lower than
the set temperature.
With instant DHW configuration on request the
CONFORT
function can be activated.
This function allows the delivery of hot water as soon as possible, while keeping the boiler hot. If the function is active, the boiler
starts when the hot water temperature is equal to the set hot water temperature; the boiler stops when the hot water
temperature is 8°C ( fixed value) higher than the set hot water temperature. If the water heated in this way is not consumed
within one hour, the
CONFOR
T function is automatically deactivated.
Activation/ deactivation of the function is done by pressing
J5
(
MENU/OK
) key, press
J1
(
P-
) or
J2
(
P+
) key until the symbol
S12
(
) flashes. Press
J3
(
P+
) or
J4
(
P-
) for activation/ deactivation.
7.2.4
Domestic hot water operation via an individual boiler connected to the boiler (see chapter 11 '' Operating modes '')
For hot water DHW operation, contact your authorized service provider, approved and trained by KOBER SRL Vaduri Branch!
C13GC35; C14GC25 boilers can work with an accumulation boiler to produce domestic hot water in accumulation mode.
C13GC35-CH1 and C13GC35-CH2 (boiler versions designed only for central heating preparation) can work with a hot-water
tank with coil, for domestic hot water production.
The boilers can work this way for both seasons ("Winter" and "Summer").
DHW heating demand by boiler is the priority of heating demand in AT mode.
If the operation with a storage/preparation tank is set, DHW demand is triggered by the boiler temperature sensor.
The boiler will operate in DHW mode when the water temperature in the tank drops below the value set by user. To homogenize
the water temperature in the boiler, the boiler pump will continue to operate for a while (indicated by parameter SP:17) after
any burning cycle.
For any type of boiler, the user will set DHW temperature in the boiler. The boiler will provide hot water at 70 ° C. The user can
limit hot water temperature from the boiler circuit board. In the case of continuous operation of the boiler at minimum
capacity in DHW mode, the boiler water temperature might exceed the value of 70 ° C. Therefore, for safety reasons, the
burner is off (the gas valve will be closed) when the boiler water temperature reaches 73 ° C (fixed value); circulation pump will
continue to operate. A new ignition will take place after the water temperature drops below 70°C
In case the boiler is configured to work with boiler, the function ANTILEGIONELLA is activated automatically. This means that the
boiler temperature is maintained at an elevated temperature for an hour, once every week.
7.2.5
Functioning as heating BOILER (HS)
The BOILER functions in this mode when „winter” season is selected. For the selection of the type of heating installation (floor or
radiators) please contact an authorised service company.
If a thermoregulator is connected to the electronic board, the BOILERs functions in thermal mode only when the surrounding
temperature is lower than the set temperature in the thermoregulator.
7.2.6
Preset functions related to BOILER safety
1.
Anti-freezing protection function.
If the temperature in the installation drops below 9°C, the system turns on the heating at
minimum charge until the temperature reaches 30°C.
2.
Post-circulation of the hot water and heating pump function.
The post-circulation cycle
starts only if the system is not in
the
BURNING
state.
Advantages:
a) it prevents the water from becoming BOILERary at high temperatures inside the heat switch. In this way, calcareous deposits
are reduced significantly
b) it prevents water from boiling inside the heat switch in the post-heat interval.
These advantages have as result the protection of the heat switch.
3.
Pump anti-blocking system and three-way valve.
If the BOILER did not go through a burning cycle in the last
24h
, the pump will be started for
12 seconds
to avoid its blocking. In
this time the three-way valve is also activated and deactivated.
4.
Post-ventilation
After each BOILER stop, the ventilator still functions for some time to evacuate completely the burning gases out of the BOILER
and also the water vapours they contain. In this way, both the ventilator control electric circuit and the primary heat switch,
which cools down partially, are protected.
5.
“Legionella” bacteria prevention function
This function is active
for the functioning of the BOILER as accumulation boiler WHW.
When hot water is prepared in the boiler, the ANTILEGIONELLA function is actived automatically. This function implies that once
a week the temperature of the water in the boiler is kept at the value of 65°C.
6.
Deaeration function
This function will be activated whenever the control panel is removed and energized (intentionally by the user, or
unintentionally by dropping the voltage) for 450 seconds. The function will only be activated if, when the power supply is
interrupted, the boiler is in the OFF state and the pressure condition (minimum 0.7 bar) is met.
7.3
BOILER switch off in safety conditions
If the user observes abnormal functioning of the equipment, if error codes are displayed repreatedly or if the user cannot
understand the actions of the central heating BOILER, the user must stop the functioning of the BOILER immediately and in
maximum safety conditions. For this, the user must perform the following operations:
- Press
POWER
key and interrupt the functioning of the BOILER;
-Disconnect the central heating BOILER from the main power line by unplugging it (if applicable);
- Interrupt the fuel circuit by turning off the gas taps;
-Interrupt the flow of house water and of heatined water by turning off the corresponding taps for these circuits;
