42 Operating the Boiler
Item
Description
3. WWSD Temp
Set the Warm Weather Shut-
down temperature.
●
Setting range: 10°C – 40°C
●
Default: OFF
4. WWSD On Diff
Set the differential temperature
to deactivate the Warm
Weather Shutdown.
●
Setting range: 1°C – 20°C
●
Default: 3°C
5. Central Htg Control
Select the heating control type.
1: Supply Temperature
2: Return Temperature
●
Default: Supply Temperature
6. CH Heat Demand
Set the heat demand control
type for Navien Thermostat,
OpenTherm, CH Thermostat
and Switched Live.
●
Default: Navien Thermostat
* When the boiler is connected to an outdoor temperature sensor
(optional), functioning may be activated according to outdoor
temperature conditions and K-factor values using the parameters.
The graph shows how the set temperature is determined.
K-factor values can be set using the front panel.
20 15
10
5
0
-10 -15 -20 -25
-5
20
30
40
50
60
50
70
80
90
4 3.5 3
2.5
2
1.5
1.2
0.6
1
0.2
Outdoor Temperature (ºC)
Outdoor Temperature Compensation
Heating flow temperature
(º
C
)
If there is an input from the outdoor temperature sensor, OTC
(Outdoor Temperature Compensation) control will be enabled
automatically. Also, if there is no input from the outdoor
temperature sensor, OTC control will be disabled automatically.
10.6.2 Setting the Central Heating Operation
To set the boiler’s central heating operation, press the Menu
button (
), and then select “2. Central Htg Operation”.
Press the Up button (
) or the Down button (
) to switch
between the list items or to increase/decrease setting values.
Press the OK button (
) to select an item or to confirm after
making changes.
Press the Back button (
) to return to the previous screen or
menu.
Item
Description
1. Central Htg ON/ OFF
Enable or disable central
heating operation.
●
Setting range: Enable/Disable
●
Default: Enable
1-1 CH Set Temp
Set the central heating target
temperature (°C)
●
Setting range for central
heating supply water: 40°C
(Absolute MIN) – 90°C
(Absolute MAX)
●
Setting range for central
heating return water: 30°C
(Absolute MIN) – 65°C
(Absolute MAX)
●
Default: 60°C
This option is available only
when “1. Central Htg ON/OFF” is
set to “Enable”.
2. OTC ON/OFF
Enable or disable the outdoor
temperature compensation
control option.
2-1 K-Factor*
K-Factor for the central heating
