49
GAS T
The display shows the value of the selected parameter. To modify
it, rotate one of the knobs.
0
Confirm the parameter value by pressing the “MODE/OK” button,
or exit without modifying the value by pressing the “MENU/RESET”
button.
0
0
0
In order to exit from the parameter menu there are two possibilities:
- pressing the “MENU/RESET” button
or
- leave the controls untouched for 60 seconds, the system
automatically exits the parameter menu.
11 .11 .1
Hydraulic configuration
This parameter allows you to choose the configuration of your
boiler selecting between:
0 = combi and flowswitch
1 = combi and flowmeter (default for BWC model)
2 = heating only with tank thermostat: in this condition, the boiler
delivers hot water to the water tank whenever a demand is made
by the relative thermostat (default for BWH model)
3 = heating only with tank sensor and sliding outlet:
in this case,
the outlet setpoint in a DHW request is no fixed at 176°F (80°C)
but variable
4 = heating only with tank sensor and fixed outlet:
this setting
performs a modulation to a fixed outlet value of 176°F (80°C) when
there is a DHW request.
NOTICE:
This parameter should always be set to 1 for BWC
Combi model.
11 .11 .2
Sliding outlet (heating only boiler)
The SLIDING OUTLET function modifies the outlet setpoint used
by the boiler when receiving a DHW request. The outlet setpoint
is calculated automatically by the boiler based on the difference
between the desired DHW setpoint and the temperature value
detected by the indirect tank sensor.
NOTICE:
we do not recommend activating this function for water
tanks with a capacity of over 26 US gallons (100 liters) since the
water tank filling would be too slow.
11 .11 .3
Heating timer
This parameter is used to manage the following timers:
- the REDUCED HEATING MAXIMUM OUTPUT TIMING, during
which the speed of the fan is limited to 75% of the maximum
heating output that has been set
- the ANTI-CYCLE, for three minutes the boiler is forced to be in
OFF mode.
The factory setting for this parameter is ACTIVE TIMERS.
To disable the timers select the value 1
.
Note: for low dissipation system this parameter is useful to be 0.
For high dissipation system this parameter is suggested to set to 1.
11 .11 .4
Domestic hot water thermostat (combi
boiler only)
This parameter allows you to set the type of DOMESTIC HOT
WATER THERMOSTAT differential.
The factory setting for this parameter is CORRELATED
THERMOSTAT, i.e. for domestic hot water the boiler switches off at
the se9°F (+5°C) and restarts at the se7°F (+4°C).
To select the ABSOLUTE THERMOSTAT value, where the boiler
for domestic hot water will switch off at +149°F (65°C) and restart
at +145°F (63°C), follow the instructions in section 11.12 and
select a value of 1 to change the parameter to an ABSOLUTE
THERMOSTAT.
11 .11 .5
System
This parameter allows you to specify the type of system to be
heated, it is possible to choose from the following options:
- HIGH TEMPERATURE (factory setting)
[20°C (68°F) - 82°C
(180°F)]
- LOW TEMPERATURE [20°C (68°F) - 45°C (113°F)]
.
11 .11 .6
Preheating (combi boiler only)
By selecting a value of 1
,
the boiler’s domestic hot water function
activates. This function keeps the water in the domestic hot water
exchanger at the DHW setpoint, to reduce standby times when
a request is made. When the preheating function is enabled the
symbol P comes on at the top. During the burner ignition following
a preheating request, the symbol P starts flashing.
To deactivate the preheating function select 0
.
NOTICE:
some applications may not be suitable for preheating,
such as those with low flow rates and above average incoming
water temperatures. The combination of these two occurrences can
result in short-cycling when used in conjunction with preheating.
11 .11 .7
Minimum CH setpoint
This parameter allows you to specify the minimum heating setpoint
that is possible:
- for high temperature systems: range 68°F (20°C) - 180°F (82°C),
default
68°F (20°C)
- for low temperature systems: range 68°F (20°C) - 113°F (45°C),
de
fault 68°F (20°C).
11 .11 .8
Maximum CH setpoint
This parameter allows you to specify the maximum heating setpoint
that is possible:
- for high temperature systems: range 68°F (20°C) - 180°F (82°C),
default 180°F (82°C)
- for low temperature systems: range 68°F (20°C) - 113°F (45°C),
default 113°F (45°C).
NOTICE:
The factory default setting for the boiler is high
temperature (radiator) system. Leaving this default setting could
cause property damage in low temperature applications.
11 .11 .9
Minimum DHW setpoint
This parameter allows you to specify the minimum domestic hot
water setpoint that is possible: range 100°F (37°C) - 120°F (49°C),
default 100°F (37°C).
