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8.7 Optional Electrical Connections
A. Outdoor Temperature Sensor
To connect this accessory, see gure 8-5, terminals 4-5, and
instructions supplied with sensor.
B. Setting "Kt" Climate Curve
When external sensor is connected to boiler, the electronic
board adjusts the ow temperature calculated according to set
Kt coefcient.
Select required curve by pressing as indicated in
chart below for selecting the appropriate curve (00 to 90).
Flow temp Outside temp
NOTE:
Temperatures below -40 °F (-40 °C), maximum heating ow temperature set point no longer increases, curves shown on graph
become horizontal.
8 - ELECTRICAL CONNECTIONS
FIGURE 8-5 Outdoor Sensor Connections
FIGURE 8-6 Kt Climate Curves
90 Is Default.
240011947 REV B, [03/31/2018]
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