59
Smoke Detectors
Smoke detectors are available as factory-installed options on
48LC 08-12 units. 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. Return air smoke detectors are ar
-
ranged for vertical return configurations only. All components
necessary for operation are factory-provided and mounted. The
unit is factory-configured for immediate smoke detector shutdown
operation; additional wiring or modifications to the Integrated
Staging Control (ISC) board may be necessary to complete the
unit and smoke detector configuration to meet project require
-
ments.
Units equipped with factory-optional return air smoke detectors
require a relocation of the sensor module at unit installation. See
Fig. 74 for the as-shipped location.
COMPLETING INSTALLATION OF RETURN-AIR
SMOKE SENSOR
1. Unscrew the two screws holding the return air smoke
detector assembly. See Fig. 75, Step 1. Save the screws.
2. Turn the assembly 90 degrees and then rotate end to end.
Make sure that the elbow fitting is pointing down. See
Fig. 75, Step 2.
3. Screw the sensor and detector plate into its operating posi
-
tion using screws from Step 1. See Fig. 75, Step 3.
4. Connect the flexible tube on the sampling inlet to the sam
-
pling tube on the basepan.
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 coordi
-
nation.
Fig. 74 —
Return-Air Smoke Detector
(Shipping Position)
Fig. 75 —
Completing Installation of Return-Air Smoke Sensor
RETURN AIR
SMOKE DETECTOR
(AS SHIPPED)
Step 1
Step 2
Step 3
Содержание 48LC Series
Страница 5: ...5 Fig 2 Unit Dimensional Drawing Size 08 Unit ...
Страница 6: ...6 Fig 2 Unit Dimensional Drawing Size 08 Unit cont ...
Страница 7: ...7 Fig 3 Unit Dimensional Drawing Size 09 and 12 Units ...
Страница 8: ...8 Fig 3 Unit Dimensional Drawing Size 09 and 12 Units cont ...
Страница 11: ...11 Fig 6 Roof Curb Details Size 08 12 Units ...
Страница 21: ...21 Fig 34 48LC 08 12 Electro mechanical Control Wiring Diagram ...
Страница 22: ...22 Fig 35 48LC 08 12 RTU Open Control Wiring Diagram ...
Страница 23: ...23 Fig 36 48LC 08 12 SystemVu Control Wiring Diagram ...
Страница 24: ...24 Fig 37 48LC 08 12 Typical Power Wiring Diagram Electromechanical and RTU Open Controls 208 230 v Unit Shown ...
Страница 25: ...25 Fig 38 48LC 08 12 Typical Power Wiring Diagram SystemVu Control 208 230 v Unit Shown ...
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