Freestyle FS-80 NG Instruction Manual page 60

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FreeStyle
ALL
24 Controls and operation
Adjustments
Theory of Outdoor Reset Control
space.
ture. These scale ranges are related to the outdoor tem-
radiation.
These "Outdoor Reset Control" curves are graphed
(and programmed into the control board) by outside
Figure 82, page 61
match the gradual increase in boiler water temperature as
the outside temperature drops.
(Figure 84, page 61) to meet the heat loss at given outdoor
temperatures.
Another example would be a high heat loss structure, where
curve number 10 would drive up the boiler water tempera-
degrees F outside temperature to just a drop to 50 degrees F
outdoor temperature, see Figure 84, page 61)
curve number 1, where the outdoor temperatures continue
to drop, and the boiler water temperatures are in the low
Outdoor Reset Control
(optional on the Combi)
1. When the external outdoor sensor is attached to the boiler,
the system can work in Outside Temperature Compensation
is controlled according to the external climate conditions,
all year round.
2. By using the CH buttons (Items 3 and 4 - Figure 72, page 56)
it is possible to set the maximum system water flow tempera-
O.T.C. setting
1. To enter the OTC- reset mode, press OTC button (Item 6 -
Figure 72, page 56
2. The display shows "CU" flashing Figure 80; to set Curve,
use the DHW buttons (Items 1 and 2 - Figure 72, page 56).
Figure 82, page 61. "O" means no O.T.C. mode.
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OUNT GAS FIRED WATER BOILER
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Boiler Manual
(continued)
Figure 80
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3. By pressing the CH push buttons (Items 3 and 4 -
Figure 72, page 56), the display shows "0F" flashing Figure 81;
- Figure 72, page 56
accordance with the chart Figure 83 or Figure 84.
4. To exit the OTC mode, press OTC button (Item 6 -
Figure 72, page 56
Figure 81
Compensation curves
low heat losses.
82, 83, & 84, page 61.
high heat losses.
Part number 550-142-850/0115