Alpine Sage2.1 Control Overview

Burnham Sage2.1 Boiler Control System (SBC2.1) – Overview (con’t)
U.S. Boiler Company – August, 2010 Page 2 of 8
• Outdoor Reset: The Sage2.1 control features a built-in outdoor reset control which
adjusts boiler temperature based on the outdoor temperature. During warmer
temperatures the building requires less heat, and the boiler temperature is reduced. This
feature helps to keep the boiler in condensing mode longer, resulting in higher efficiency.
In addition, outdoor reset improves comfort by reducing overheating of the zones, and
quiets expansion noises as piping and radiation expands and contracts less. The outdoor
reset curve can be adjusted, using settings that are easy to understand: Outdoor high and
low temperatures, and boiler high and low temperatures.
o With the Sage2.1, the Outdoor Reset function is “enabled” as a factory default
setting and does not require the installer to enable the feature on each boiler.
This helps ensure the boiler to operate at the highest possible efficiency.
o The Outside Air Sensor is “enabled” as a factory default setting in Sage2.1
controls. This saves the installer an additional step when setting up the boiler
and eliminates the possibility of overlooking the setting.
o The “Low Boiler Temp” is factory set at 110°F. Adjusting this setting upward
provides higher temperatures across the entire outdoor reset curve and helps to
improve the comfort of the heating system.
o Outdoor Reset Boost feature is factory-set for 20 minutes and will raise the boiler
temperature 10°F if the heat demand is not satisfied within that time frame. The
Boost features allows installer to adjust the boiler with an aggressive outdoor
reset curve in order to maximize system
efficiency and energy savings while ensuring
that the boiler will provide high enough
temperatures to maintain comfort.
• Domestic Priority with Priority
Protection:
The Sage2.1 features built-in
Domestic Priority. When selected, all of the
Alpine’s output is directed to the indirect water
heater in order to minimize recovery time. Priority
Protection is provided to allow the boiler to
continue heating the building in the event of
excessive domestic hot water demand. This
feature provides back-up in the event of an excessive demand for hot water, or a
component failure in the hot water system such as a sensor, aquastat, or circulator,
allowing the boiler to continue heating the building and avoid excessive drops in
temperature, or possible freezing.
• Warm Weather Shutdown: Ideal for commercial installations that maintain
heating loop temperatures year round. The Warm Weather Shutdown feature on the
Sage2.1 control system can be adjusted to allow the heating loop to cool when the
outdoor temperature reaches a specified temperature. This helps to reduce unnecessary
boiler/pump cycling and standby losses. Even with the Warm Weather feature active,
the boiler will still respond to DHW demands.
A
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with Sa
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Wall Hung
Floor Moun
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