Carrier WeatherExpert 48LC B14 Series, Руководство по установке

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Smoke Detectors
Smoke detectors are available as factory-installed options on
48LC*B14-26 models. Smoke detectors may be specified for sup-
ply air only, for return air without or with economizer, or in com-
bination of supply air and return air. The unit is factory-configured
for immediate smoke detector shutdown operation; additional wir-
ing 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. 64). Its operating
location is in the return air section of the unit (see Fig. 65, unit
without economizer, or Fig. 66, unit with economizer), inserted
into the return air sensor module housing which protrudes through
the back of the control box.
Fig. 64 — Typical Supply Air Smoke Detector Sensor
Location
Fig. 65 — Return Air Sampling Tube Location in Unit
without Economizer
Fig. 66 — 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. For vertical application, position the sampling holes on
the bottom of the tube, facing into the bottom return duct
opening. For horizontal application, 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 the Application Data sheet,
Factory-Installed Smoke De-
tectors for Small and Medium Rooftop Units 2 to 25 Tons for dis-
cussions on additional control features of these smoke detectors
including multiple unit coordination.
Step 15 — Install Accessories
Available accessories include:
• Curb
• Thru-base connection kit (must be installed before unit is
set on curb)
• Power Exhaust
• Outdoor enthalpy sensor
• Differential enthalpy sensor
• CO
2
sensor
• Louvered hail guard
• Phase monitor control
Refer to separate installation instructions for information on in-
stalling these accessories.
Pre-Start and Start-Up
This completes the mechanical installation of the unit. Refer to the
unit’s Service and Maintenance manual for detailed Pre-Start and
Start-up instructions.
RO
TA
TI
O
N
RETURN AIR
SAMPLING TUBE
(SHIPPING LOCATION)
RETURN AIR DETECTOR
SAMPLING TUBE
RETURN AIR DETECTOR
SAMPLING TUBE