8.7
Setback mode selection
The Logamatic 2107 control contains night setback capability and allows you to
select from 4 different types or modes of night setback for customized operation.
These setback modes differ in their operation.
Night Setback Options
Recommended setting
Heating circuit with constant circulation zone:
RMSETBACK (Requires room sensor)
Heating circuit with ONlOFF thermostats:
SETBACK (No room sensor present)
Commercial (day use only) buildings:
OASETBACK
1 Boiler Off
("BLR OFF")
In this mode the heating system shuts down completely during the night time as
long as the outdoor temperature exceeds the "FREEZTEMP" setting. Below the
"FREEZTEMP" value, the circulators run in freeze protection mode. The boiler
only fires if the water temperature drops below 41°F (5°C). No room sensors are
used in this setback mode.
2 General Setback
("SETBACK")
The heating circulators continue operation in the "SETBACK" mode; the boiler
operates on a lower heating curve and fires the burner as needed. This mode is
generally used when no room sensors are present and individual zones are
controlled by conventional thermostats.
3 Room Setback
("RMSETBACK")
This setback mode should only be selected when a room sensor is installed and
activated. The system operates to maintain the desired night time temperature
as specified on the room sensor. The circulators will operate continuously when
the outdoor temperature is below the "FREEZTEMP" setting; the circulators shut
down when the outdoor temperature is above the "FREEZTEMP" setting and the
actual room temperature exceeds the night time setting.
4 Outdoor Air Setback
("OASETBACK"), factory default
The heating system (burner and heating circulators) shuts down in night mode
if the outdoor temperature exceeds the "FREEZTEMP"; if the outdoor
temperature drops below the "FREEZTEMP", the heating system operates on a
setback curve. This mode should only be used on buildings not occupied in the
night mode; i.e. commercial and daytime use only buildings. A room sensor is
generally not used in this application.
BLR OFF
SETBACK
RMSETBACK
OASETBACK
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.
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5
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Heating circuit data
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