Navien LCB700-21RS, Installation & Operation Manual

Page: 58 / 96

58 Operating the Boiler
The graph shows how the set temperature is determined.
K-factor values can be set using the front panel or the Smart
Room Controller.
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.
OTC control can be enabled or disabled by the room thermostat
signals. If the room thermostat is on (short), and the set supply
water temperature calculated by the outdoor temperature
and the K-factor values is above 30°C, OTC control is enabled. If
the set supply water temperature is below 30°C, OTC control is
disabled.
11.4.4 Setting the DHW Operation
To set the boiler’s indirect (System/Regular) or direct (Combi)
DHW operation, press the Menu button (
), and then select
“4. DHW Operation”.
11.4.3 Setting the Central Heating Operation
To set the boiler’s central heating operation, press the Menu
button (
), and then select “3. Central Htg Operation”.
Rotate the Command dial ( ) to switch between the list items
or to increase/decrease setting values. Press the Command dial
(
) 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.
Ɣ
Setting range: Enable/Disable
Ɣ
Default: Enable
1-1 CH Set Temp
Set the central heating target
temperature (°C)
Ɣ
Setting range: 40-85°C
Ɣ
Default: 85°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
2-2 WWSD Temp
Set the Warm Weather Shut-down
temperature.
Ɣ
Setting range: OFF, 10°C – 40°C
Ɣ
Default: OFF
2-3 WWSD On Diff
Set the differential temperature
to deactivate the Warm Weather
Shutdown.
Ɣ Setting range: 1°C – 20°C
Ɣ Default: 3°C
3. CH Control
Method (System/
Regular Only)
Select the heating control type.
1: Supply Temperature
2: Return Temperature
Ɣ
Default: Supply Temperature
* 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.