Table of Contents
Advertisement
Item
Select a heatload type
for the Outdoor Reset
Control.
4-1. Outdoor Reset
Curves
Set the maximum
temperature for the
Outdoor Reset Control.
4-2. Outdoor High
●
Temp Set
●
Set the maximum
temperature for the
Outdoor Reset Control.
4-3. Outdoor Low
●
Temp Set*
●
Set the Warm Weather
Shut-down temperature.
4-4. WWSD Temp
●
●
Set the differential
temperature to deactivate
the Warm Weather Shut-
down.
4-5. WWSD On Diff
●
●
Set the boost interval
time.
4-6. Boost Interval
●
Time
●
Enable or disable heating
zones utilizing the Navien
Zone Controller.
5. Navien zone cont.
●
●
106 Operating the Boiler
Description
1: Finned Tube Baseboard
2: FAN Coil
3: Cast Iron Baseboard
4: Low Mass Radiant
5: High Mass Radiant
6: Radiator
7: Custom (set by
installer)
Setting range: [MIN
Set-point + 9°F (5°C)] –
104°F (40°C)
Default: 70°F (21°C)
Setting range: -4°F
(-20°C) – [MAX Set-point
– 9°F (5°C)]
Default: 14°F (-10°C)
Setting range: OFF, 50°F
(10°C) – 104°F (40°C)
Default: OFF
Setting range: 0°F (0°C)
– 36°F (20°C)
Default: 5°F (3°C)
Setting range: 0 – 120
min
Default: 0 min
Setting range: Enabled/
Disabled
Default: Disabled
Item
Select a heating control
type.
Temperature
Temperature
●
6. SH Control
Method
This menu is not available
when connecting the AHU
communication type or
cascade mode because
heating is performed only
by controlling the heating
supply water.
* Available only when "4. Outdoor Reset ON/OFF" is set to
"Enabled".
** A preset or user defined temperature range is set
automatically based on the curve selected. Refer to the
settings table for details.
Supply Set
Heat Load
Point Range
1. Finned
120–180°F
Tube
(48.5–82°C)
Baseboard
140–180°F
2. Fan Coil
(60–82°C)
3. Cast Iron
100–170°F
Baseboard
(37.5–76.5°C)
4. Low Mass
80–140°F
Radiant
(26.5–60°C)
5. High Mass
80–120°F
Radiant
(26.5–48.5°C)
120–170°F
6. Radiators
(48.5–76.5°C)
104–180°F
7. Custom
(40–82°C)
Heat loads 1-6 show the preset temperature ranges
based on the load type selected, while heat load 7
provides a custom temperature range. When the custom
temperature range is in use, the boiler operates based
on the user–defined "Absolute Min" and Absolute Max"
temperature settings.
*** The boost interval time may be set to prevent
interruption in space heating while using the Outdoor
Reset Control mode, due to changes in heat load
conditions. With the boost interval time enabled, the
boiler increases the space heating supply temperature
by 9°F (5°C) and the return temperature by 5°F (3°C)
after a set time elapses.
Once the boost interval time expires or the heat load
demand is satisfied, the boiler will then revert back to
its normal space heating settings.
Description
1: Supply Temperature
2: Return Temperature
3: Sys Supply
4: Sys Return
Default: Supply
Temperature
Note
Return Set
Remarks
Point Range
101–147°F
Default
(38–63.5°C)
116–147°F
(46.5–63.5°C)
86–139°F
(30–59°C)
70–116°F
(21–46.5°C)
70–101°F
(21–38°C)
101–139°F
(38–59°C)
86–149°F
User-
(30–65°C)
defined
Advertisement
Table of Contents
