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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)
EconoMi$er
R
X (with control)
Power Exhaust
Outdoor enthalpy sensor
Differential enthalpy sensor
CO
2
sensor
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.
ROT
ATION
Return Air Sampling Tube
(Shipping Location)
C09102
Fig. 63 -- Typical Supply Air Smoke Detector Sensor
Location
Return Air Detector
Sampling Tube
C09135
Fig. 64 -- Return Air Sampling Tube Location
in Unit without Economizer
Return Air Detector
Sampling Tube
C09136
Fig. 65 -- Return Air Sampling Tube Location
in Unit with Economizer
Summary of Contents for WeatherExpert 48LC
Page 5: ...5 C13057 Fig 2 Unit Dimensional Drawing 14 Size Unit Sheet 1 of 3 ...
Page 6: ...6 C13058 Fig 2 cont Unit Dimensional Drawing 14 Size Unit Sheet 2 of 3 ...
Page 7: ...7 C13059 Fig 2 cont Unit Dimensional Drawing 14 Size Unit Sheet 3 of 3 ...
Page 8: ...8 C13032 Fig 3 Unit Dimensional Drawing 17 and 20 Size Units Sheet 1 of 3 ...
Page 9: ...9 C13033 Fig 3 cont Unit Dimensional Drawing 17 and 20 Size Units Sheet 2 of 3 ...
Page 10: ...10 C13034 Fig 3 cont Unit Dimensional Drawing 17 and 20 Size Units Sheet 3 of 3 ...
Page 11: ...11 C14106 Fig 4 Unit Dimensional Drawing 24 and 26 Size Units Sheet 1 of 3 ...
Page 12: ...12 C14107 Fig 4 cont Unit Dimensional Drawing 24 and 26 Size Units Sheet 2 of 3 ...
Page 13: ...13 C14108 Fig 4 cont Unit Dimensional Drawing 24 and 26 Size Units Sheet 3 of 3 ...
Page 17: ...17 C13054 Fig 8 Roof Curb Details 14 Size Unit ...
Page 18: ...18 C13055 Fig 9 Roof Curb Details 17 and 20 Size Units ...
Page 19: ...19 C13056 Fig 10 Roof Curb Details 24 and 26 Size Units ...
Page 27: ...27 a48 9336 Fig 26 48LC 14 26 Electro mechanical Control Wiring Diagram ...
Page 28: ...28 a48 9337 Fig 27 48LC 14 26 RTU Open Control Wiring Diagram ...
Page 29: ...29 a48 9338 Fig 28 48LC 14 26 SystemVut Control Wiring Diagram ...
Page 31: ...31 a48 9339 Fig 30 Typical Power Wiring Diagram SystemVut Controls 48LC 26 208 230V Shown ...
Page 58: ...58 a48 9340 Fig 55 Typical EconoMi erR X Wiring Diagram ...