Grundfos MixiMizer Installation And Operation Manual page 9

Outdoor Air Temperature Sensor (OATS):
The Outdoor Air Temperature Sensor includes a built
in 10 kW (ohm) thermistor which provides an accurate
measurement of the outdoor temperature. The OATS
sensor is protected by a white U.V. resistant PVC plastic
enclosure (Fig. 3A & 3B).
Figure 3A - Closed
Outdoor Air Temperature
Sensor (OATS)
• Remove the screw and pull the front cover off the
sensor enclosure.
• The OATS can either be mounted directly onto a
wall or in a 2" x 4" electrical box. When the OATS
is wall mounted, the wiring should enter through
the back or bottom of the enclosure. Do not
mount the OATS with the conduit knockout fac-
ing upwards as rain could enter the enclosure
and damage the sensor (Fig. 4).
• In order to prevent heat transmitted through the
wall from affecting the sensor reading, it may be
necessary to install an insulating barrier behind
the OATS enclosure.
• The OATS should be mounted on a wall which
best represents the heat load on the building (a
northern wall for most buildings or a southern fac-
ing wall for buildings with large south facing glass
areas). The OATS should not be exposed to heat
sources such as ventilation or window openings.
Sensor
Figure 3B - Open Outdoor
Air Temperature Sensor
(OATS)
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