Operating the Boiler 45
Outdoor Low Temperature Setting Range
Range
Remarks
-20°C – [Outdoor Max
Temperature set point - 5°C]
Default: - 10°C
Setting the Highest Outdoor Temperature
Display
Description
Highest outdoor temperature
(°C)
Highest outdoor temperature
not in use
This mode is used to configure the highest outdoor
temperature. The boiler will operate at the low end of the supply
or return set-point range at this outdoor temperature.
Outdoor High Temperature Setting Range
Range
Remarks
[Outdoor Min Temperature set
point + 5°C] – 40°C
Default: 21°C
Types of Heat Load
Heat Load
Supply Set-
point Range
Return Set-
point Range
Remarks
1. Finned
Tube
Baseboard
48.5–82°C
38–63.5°C
Default
2. Fan Coil
60–82°C
46.5–63.5°C
3. Cast Iron
Baseboard
37.5–76.5°C
30–59°C
4. Low Mass
Radiant
26.5–60°C
21–46.5°C
5. High Mass
Radiant
26.5–48.5°C
21–38°C
6. Radiators
48.5–76.5°C
38–59°C
7. Custom
Supply Control:
Absolute MIN/
MAX set point
Return Control:
Absolute MIN/
MAX set point
User-
defined
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.
Setting the Lowest Outdoor Temperature
Display
Description
Lowest outdoor temperature
(°C)
Lowest outdoor temperature
not in use
This mode is used to configure the lowest outdoor temperature.
The boiler will operate at the high end of the supply or return
set-point range at this outdoor temperature.
