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Types of Heat Load
Supply Set-
Heat Load
point Range
1. Finned
Tube
48.5–82°C
Baseboard
2. Fan Coil
60–82°C
3. Cast Iron
37.5–76.5°C
Baseboard
4. Low Mass
26.5–60°C
Radiant
5. High Mass
26.5–48.5°C
Radiant
6. Radiators
48.5–76.5°C
Supply Control:
7. Custom
Absolute MIN/
MAX set point
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
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.
Return Set-
Remarks
point Range
38–63.5°C
Default
46.5–63.5°C
30–59°C
21–46.5°C
21–38°C
38–59°C
Return Control:
User-
Absolute MIN/
defined
MAX set point
Description
Lowest outdoor temperature
(°C)
Lowest outdoor temperature
not in use
Outdoor Low Temperature Setting Range
Range
-20°C – [Outdoor Max
Temperature set point - 5°C]
Setting the Highest Outdoor Temperature
Display
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
[Outdoor Min Temperature set
point + 5°C] – 40°C
Remarks
Default: - 10°C
Description
Highest outdoor temperature
(°C)
Highest outdoor temperature
not in use
Remarks
Default: 21°C
Operating the Boiler
45
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