Smoke Detectors; Return Air Sensor Tube Installation; Smoke Detector Test Magnet; Additional Application Data - Carrier WeatherExpert 48LC Installation Instructions Manual

Smoke Detectors

Smoke detectors are available as factory- - installed options
on 48LC 14- - 26 models. Smoke detectors may be
specified for Supply Air only or for Return Air without or
with economizer or in combination of Supply Air and
Return Air. The unit is factory- - configured for immediate
smoke detector shutdown operation; additional wiring or
modifications to unit's Integrated Staging Control (ISC)
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.
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 direction. For vertical application, position the
sampling holes on the bottom of the tube, facing into
the bottom return duct opening. For horizontal applic-
ation, position the sampling holes on the side of the
tube, facing the unit's end panel.
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 Factory Installed Smoke Detectors for Small and
Medium Rooftop Units 2 to 25 Tons for discussions on
additional control features of these smoke detectors
including multiple unit coordination.
Step 13 — Install Accessories
Available accessories include:
Roof Curb (must be installed before unit)
R
EconoMi$er X (with control)
Power Exhaust
Outdoor enthalpy sensor
Differential enthalpy sensor
CO sensor
2
Temperature and Humidity sensors
Louvered hail guard
Phase monitor control
Refer to separate installation instructions for information
on installing these accessories. See Price Pages for a
complete list of field- - installed accessories.
Fig. 63 - - Typical Supply Air Smoke Detector Sensor
Location
Fig. 64 - - Return Air Sampling Tube Location
in Unit without Economizer
Fig. 65 - - Return Air Sampling Tube Location
in Unit with Economizer
80
Return Air Sampling Tube
(Shipping Location)
C09102
Return Air Detector
Sampling Tube
C09135
Return Air Detector
Sampling Tube
C09136