Navien NFB-175H, Руководство по установке, Страница: 104 / 135

104 Operating the Boiler
Item Description
6. DHW control
method
Select a DHW control
type.
1. Supply water
2. Sys Supply water
●
Default: Supply water
* DHW Priority Time refers to the time duration that the
boiler will give priority to DHW over space heating.
** This function will provide protection from growth
of legionella bacteria in the DHW tank only. It will
not protect water supply piping.
A mixing valve must be installed on the DHW
supply line when this mode is enabled as water
temperatures will exceed 140°F (60°C).
11.5.4 Viewing Error History
To view the error history, press the Menu button
( ), and then select “4. Error History”.
A list of 10 recent errors are displayed on the screen,
with the most recent error displayed at the top of
the list.
Press the Back button ( ) to return to the previous
screen or menu.
Item Description
1. DHW Tank Set
Temp
Set the external hot water
tank temperature (°F).
●
Setting range: 86
–
149°F
(30
–
65°C)
●
Default: 122°F (50°C)
This option is available
only when a tank
temperature sensor is
connected to the boiler,
and only when “3. DHW
Call Signal” is set to “2.
DHW Tank Sensor”.
2. DHW Boiler Set
Temp
Set DHW Thermostat
Temperature.
●
Setting range: 104°F
(40°C, Absolute MIN) -
180°F (82°C, Absolute
MAX).
●
Default: 180°F (82°C)
Set DHW Tank Sensor
Temperature.
●
Setting range: [DHW
Tank Set Temp +
18°F (10°C)] – 180°F
(82°C, Absolute MAX)
●
Default: 180°F (82°C)
3. DHW Call Signal
Select a device for sensing
the DHW demand.
1. DHW Thermostat
2. DHW Tank Sensor
●
Default: DHW
Thermostat
4. DHW Priority
Time*
Set the DHW Priority time.
●
Setting range: 0 – 180
min
●
Default: 30 min
5. Anti Legionella
Function**
Enable or disable the
protection against
legionella bacteria.
●
Setting range: Enable /
Disable
●
Default: Disable