1.0 Introduction
The gas-fired modulating boilers are low pressure, fully condensing units with a variable input range.
Approved as “Category IV” vented appliances, the boilers use direct vent (sealed combustion) or
indoor combustion air.
Figure 10 View from the front - SL G3 residential boilers
1.1 Standard features and benefits
High thermal efficiency
Turn-down ratio 10 to 1
Control of up to 5 pumps – 1 boiler pump and 4 separate load pumps
Outdoor reset control
Load combining – simultaneous operation of two similar water temperature loads
Load zoning – simultaneous operation of up to four loads with the same control settings
Ability to manage and/or operate in a network of up to 24 IBC SL boilers
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