Appendices 75
12.4 Outdoor Temperature Sensor
(Optional)
The boiler is designed to be able to function with an outdoor
temperature sensor (10kΩ @ 25°C). Connect the sensor cables
to the terminals 3 and 4 of the boiler terminal strip. For more
information on the boiler terminal strip, refer to “8.5 Connecting
the Outdoor Temperature Sensor” on page 45.
Outdoor Temperature Sensor Installation Guidelines
●
Avoid areas with temperature fluctuations by direct sunlight,
and where the temperature may not be representative of true
outdoor temperature.
●
Best location to install the temperature sensor is on a North or
Northeast side of a structure under eaves where the sensor is
shielded from direct sunlight.
●
Avoid placing sensor in close proximity of heat sources that
may affect correct temperature sensing. (fans, exhausts, flues,
lights)
●
Avoid installing the sensor in areas where the sensor is
subjected to excessive moisture.
●
Use 18 gauge wiring (thermostat wiring) with no splices.
(except at the unit harness connection with yellow leader
wire.)
●
Caution should be taken to avoid potential electromagnetic
interference (EMI) by routing separately from potential
sources such as line voltage wiring. When necessary, shielded
cable may be used.
●
The sensor is a water resistant device.
●
Any damage to the device may require the replacement of the
entire component.
Summary of Contents for NCB300-28K
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