Technical Information
3
Logano G125 BE - Specifications subject to change without notice.
9
3.2.1 General Operating Requirements
Operating Conditions
Minimum Boiler tempera-
ture
Boiler Shutdown
Boiler Shutdown/
Mixed temperature
1
Minimum return temperature
Systems controlled by R2107 controls for outdoor reset operation
No requirements
Operating conditions are met
with R2107 control
2
Automatic with Logamatic
R2107
No requirement, yet beneficial
with low temperature boiler with
130/113 °F system design
Necessary with:
–
Radiant floor applications
–
Systems with large water con-
tent > 115 gal/100,000 Btu/hr
No requirement
Systems controlled by Aquasmart or R2109
150 °F
3
Possible, provided the boiler op-
erates after total shut-down for
at least 3 hours.
Necessary
Necessary for:
–
Systems with large water
content > 115 gal/100,000
Btu/hr: 130 °F
–
Firing with modulating burn-
ers: 130 °F
Table 3 General Operating Requirements
1
A heating circuit equipped with a motorized mixing valve improves the controllability of that sub-system and is specifically recommended when
requiring different water temperatures.
2
In case the control system has no influence over the flow in a heating circuit (for instance using the Pumplogic feature of the R2107), then one
should achieve a minimum supply temperature of 122 °F within 10 minutes after burner start-up by means of reducing (or interrupting) the water
flow through the boiler.
3
Minimum setting on the adjustable high limit or Aquasmart: During burner operation one should achieve the minimum boiler temperature within
10 minutes after burner start-up by means of flow reduction and one should maintain this temperature.
