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Pellet Boiler Outdoor Air Reset Operation

When the outdoor sensor is installed, at 20° F. or below OAT (Outdoor Air Temperature), the boiler will operate at the temperature set on the Maximum Temperature knob. The boiler water temperature will decrease by 1 degree for every 1 degree in temperature rise of the Outside Air.

 

Example 1

OAT

Water Temp

Degree Change

 

Max set at 185o

65o

140o

-45°

 

 

Min set at 140o

60o

145o

-40°

 

 

 

 

55o

150o

-35°

 

 

 

 

50o

155o

-30°

 

 

 

 

45o

160o

-25o

 

 

 

40o

165o

-20o

 

 

 

35o

170o

-15o

 

 

 

30o

175o

-10o

 

 

 

25o

180o

-5o

 

 

 

20o

185o

0o

 

 

 

15o

185o

0o

 

 

 

10o

185o

0o

 

 

 

5o

185o

 

 

 

 

0o

185o

 

 

 

 

Example 2

OAT

Water Temp

Degree Change

 

 

Max set at 180o

65o

150o

*

 

 

 

Min set at 150o

60o

150o

*

 

 

 

 

55o

150o

*

 

 

 

 

50o

150o

-30o

 

 

 

45o

155o

-25o

 

 

 

40o

160o

-20o

 

 

 

35o

165o

-15o

 

 

 

30o

170o

-10o

 

 

 

25o

175o

-5o

 

 

 

20o

180o

0o

 

 

 

15o

180o

0o

 

 

 

10o

180o

0o

 

 

 

5o

180o

0o

 

 

 

0o

180o

0o

* No change in boiler temperature after reaching minimum setpoint temperature.

Operation

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Image 25
Hearth and Home Technologies BH 105 manual Pellet Boiler Outdoor Air Reset Operation

BH 105 specifications

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