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AM Series Boiler & Water Heater User Manual
CHAPTER 9 – OPERATION
9.10.1 Outdoor Reset: Setting Parameters
The following are the parameter settings for Outdoor Reset (See Section 9.16):
•
2020 = "Warm weather shutdown temperature". When the outdoor temperature drops this
value the heating system is forced to shut-down. Suggested starting value is 72°F (22°C).
•
2021 = "Winter outdoor temperature". Is the design winter temperature used for the basic
heat load calculation.
•
2022 = "Winter supply temperature". Is the supply temperature correspondent to the "Winter
outdoor temperature" (parameter 2021). Suggested values are 104°F (40°C) for floor radiant
panels or 158°F (70°C) for radiator heating systems.
•
2023 = "Spring outdoor temperature". Is the typical spring outdoor temperature you want the
heating service to the minimum capacity. Suggested value is 64°F (18°C).
•
2024 = "Spring supply temperature". Is the supply temperature correspondent to the "Spring
outdoor temperature" (parameter 2023). Suggested values are 86°F (30°C) for floor radiant
panels or 108°F (42°C) for radiators heating systems.
9.10.2 Outdoor Reset Activation
Once selected, reset adjustment is completely automatic and will switch off at the end of the
heating season and switch back on at the beginning of the heating season. When the outdoor
temperature is higher than parameter 2020, ("Warm weather shutdown temperature") the
heating service switches off. When the outdoor temperature lowers below parameter 2020,
("Warm weather shutdown temperature"), the heating service switches back on. If, for some
reason, the heating service doesn't match the load, adjust parameters 2022 (during cold winter)
and 2024 (during spring season) to raise or lower the calculated temperature and match the
desired room temperature.
Figure 9-2: Outdoor Reset Settings Adjustment Graph
OMM-0100_E • GF-146 • 11/15/2019
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 107 of 170
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