Smoke Detectors; Return Air Sensor Tube Installation; Smoke Detector Test Magnet; Additional Application Data - Carrier WeatherMaker 50TC Series Installation Instructions Manual

Smoke Detectors

Smoke detectors are available as factory-installed options on
50TC models. Smoke detectors may be specified for supply air
only, for return air without or with economizer, or in combina-
tion of supply air and return air. The unit is factory-configured
for immediate smoke detector shutdown operation; additional
wiring or modifications to unit terminal board may be necessary
to complete the unit and smoke detector configuration to meet
project requirements.

RETURN AIR SENSOR TUBE INSTALLATION

The return air sampling tube is shipped in the unit's supply fan
section, attached to the blower housing (see Fig. 63). Its operating
location is in the return air section of the unit (see Fig. 64, unit
without economizer, or Fig. 65, unit with economizer), inserted
into the return air sensor module housing which protrudes through
the back of the control box.
Fig. 63 — Typical Supply Air Smoke Detector Sensor
Location
Fig. 64 — Return Air Sampling Tube Location in Unit
without Economizer
RETURN AIR SAMPLING TUBE
(SHIPPING LOCATION)
RETURN AIR DETECTOR
SAMPLING TUBE
Fig. 65 — Return Air Sampling Tube Location in Unit
with Economizer
To install the return air sensor sampling tube:
1. Remove the tube from its shipping location.
2. Open the unit end to access the return air sensor (located on
right-hand partition).
3. Orient the tube's sampling holes into the return air flow direc-
tion. Position the sampling holes on the bottom of the tube,
facing into the bottom return duct opening.
4. Insert the sampling tube into the return air sensor module
until the tube snaps into position.
5. Replace end panel or outside air hood.

SMOKE DETECTOR TEST MAGNET

Locate the magnet; it is shipped in the control box area.

ADDITIONAL APPLICATION DATA

Refer to the application data sheet titled "Factory-Installed Smoke
Detector, for Small and Medium Rooftop Units 2 to 25 Tons" for
discussions on additional control features of these smoke detectors
including multiple unit coordination.
56
RETURN AIR DETECTOR
SAMPLING TUBE