Air Products & Controls SL-DA4R Series Installation And Maintenance Instructions Manual

AIR PRODUCTS
AND
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PRODUCT APPLICATION

SL-DA4R Series duct smoke detectors provide early detection of smoke and
products of combustion present in air moving through an HVAC duct supply,
return, or both in commercial, industrial, and residential applications. These
devices are designed to prevent the recirculation of smoke in areas by the air
handling system's fans and blowers. Complete systems may be shut down in
the event of smoke detection, via the alarm relay contacts provided and/or the
building's fire alarm control panel (FACP).
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NOTE: For the correct installation of a duct smoke unit, please refer to
the NFPA 72 (National Fire Alarm Code), NFPA 90A (Standard for Installation of Air
Conditioning and Ventilation Systems), NFPA 92A (Recommended Practice for Smoke
Control Systems.), NFPA 5000 (Building Construction and Safety Code), IMC (International
Mechanical Code), and IFC (International Fire Code).
This detector requires a UL Listed compatible FACP as well as a separate power
supply (for 4-wire functionality) to operate properly. Refer to FACP documentation
to ensure compatiblity.
This detector is not intended for open area protection nor should it be used for
early warning detection or replace a regular fire detection system.
PRODUCT DESCRIPTION
The SL-DA4R Series smoke detector is fitted with a mounting base that
will accept an ionization smoke detector head Apollo model 55000-550 or
photoelectric smoke detector head Apollo model 55000-650. The detector
provides a cover removal switch, which supervises the removal of the
detector cover.
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This detector is equipped with a cover removal switch that
instantly provides a trouble condition at the FACP upon removal of
the clear cover. For all testing and inspection with the cover removed,
the cover removal switch (designated as SW1 on PCB) must be
manually depressed to simulate normal standby operation.
The SL-DA4R Series duct detector will operate from a compatible FACP supplied
voltage/protocol source (nominally, 17-28VDC). The control board is additionally
supplied with a separate 24VDC or 24VAC power source for 4-wire functionality.

SAMPLING TUBES

The operating principle of a duct detector is based on the Venturi effect. Two
tubes extend into the HVAC duct. Air flowing through the duct is forced into
the air intake (inlet) tube via the air intake holes, (facing the airflow) and passes
over the detector head. The air will be drawn out via the exhaust tube back into
the HVAC duct. (A 7" exhaust tube is provided in the installation kit.) When the
concentration of smoke particles suspended in the air stream reach the alarm
threshold of the detector head, the unit will go into alarm.
The duct smoke detector units are designed to operate in duct widths from 6"
to 10' wide with an air velocity between 100 to 4,000 feet per minute. To verify
correct installation, the pressure differential between the sampling (high side) and
exhaust (low side) tubes should be measured using a Magnehelic pressure gauge
or equivalent. An acceptable reading is between 0.01 and 1.2 inches of water.
AIR PRODUCTS AND CONTROLS INC.
SL-DA4R SERIES DUCT SMOKE DETECTORS
INSTALLATION AND MAINTENANCE INSTRUCTIONS
SL-DA4R-N 4-Wire Analog Addressable, Ionization Type
SL-DA4R-P 4-Wire Analog Addressable, Photoelectric Type

PRODUCT OVERVIEW

1
To minimize the impact of air turbulence and stratification on performance,
a duct smoke detector should be located as far as possible downstream
from any obstruction (i.e. deflector plates, elbows, dampers, etc.). In
all situations, confirmation of velocity and pressure differential within
specifications is required.

REMOTE ACCESSORIES

Remote alarm indicators and remote test switches may be accommodated
by the SL-DA4R Series duct units by connecting to DC voltage output
terminals as described on Page 3.

DUCT PREPARATION

Remove mounting template from the installation kit. Remove paper
backing from the mounting template and affix it to the duct at the
desired location. Using the template as a guide, drill (2) mounting
holes, 3/32" (2.5mm) for the #12 X ½" sheet metal screws packaged
in the installation kit. Drill or punch (2) 1¼" (32mm) holes for inlet
sampling and exhaust tubes, using the template as a guide. Clean all
holes.

SL-DA4R AT-A-GLANCE

MODEL NUMBER:
SL-DA4R-N 4-Wire Analog Addressable
Ionization Duct Smoke Detector
SL-DA4R-P 4-Wire Analog Addressable
Photoelectric Duct Smoke Detector
DETECTOR HEAD MODEL NUMBER:
Ionization Detector Head:
Photoelectric Detector Head: Apollo 55000-650
DETECTOR VOLTAGE REQUIREMENTS:
Operating Voltage Range: 17-28VDC (24VDC Nominal)
CONTROL BOARD CURRENT REQUIREMENTS:
Operating Voltage:
Standby Current:
Alarm Current:
GENERAL SPECIFICATIONS:
Air velocity: 100 to 4,000ft/min.
Ambient temperature: SL-DA4R-N: 32°F to 150°F (0°C to 66°C)
SL-DA4R-P: 32°F to 140°F (0°C to 60°C)
Humidity: 10% to 85% RH Non-Condensing/Non-Freezing
Material: Gray plastic back box with clear plastic cover
(Makrolon 94V-0)
Dimensions: 13½" L X 4½" W X 2¼" D
Max. net wt.: 2.25 lbs.
Radioactive element: SL-DA4R-N (Ionization) - Americium 241,
0.9 micro curie.
Do not expose to corrosive atmospheres.
U.S. Patents 6,741,181 and Patents Pending
Apollo 55000-550
24VDC 24VAC
26mA 105mA
54mA 195mA
INST AP-330 D140113