Carrier WeatherMaster Puron 48HC D17 Service And Maintenance Instructions page 27

SUPPLY-AIR
SMOKE
DETECTOR
SENSOR
SUPPLY-AIR
SMOKE
DETECTOR
SENSOR
Fig. 32 — Typical Supply-Air Smoke Detector Sensor
Location
RETURN AIR WITHOUT ECONOMIZER
The sampling tube is located across the return air opening on
the unit basepan. See Fig. 33. The holes in the sampling tube
face downward, into the return air stream. The sampling tube is
attached to the control module bushing that extends from the
control box through the partition into the return air section of
the unit. The sensing tube is shipped mounted to the indoor
blower housing and must be relocated to the return air section
of the unit. Installation requires that this sensing tube be at-
tached to the control module bushing. See installation steps.
RETURN-AIR
SMOKE
DETECTOR
SENSOR
Fig. 33 — Typical Return-Air Smoke Detector
Location (without Economizer)
RETURN AIR WITH ECONOMIZER
The sampling tube is inserted through the side plates of the
economizer housing, placing it across the return air opening on
the unit basepan. See Fig. 34. The holes in the sampling tube
face downward, into the return air stream. The sampling tube is
connected through tubing to the return air sensor that is mount-
ed on a bracket high on the partition between return filter and
controller location. The return-air sensor is shipped in a flat-
mounting location. Installation requires that this sensor be relo-
cated to its operating location and the tubing to the sampling
tube be connected. See installation steps.
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