Kidde KI-DDOS Installation Sheet

KI-DDOS Intelligent Duct
Smoke Detector Installation
Sheet
Description
KI-DDOS Intelligent Duct Smoke Detectors detect the presence of
smoke in a building's HVAC system under extended temperature
ranges. Their primary purpose is to provide early warning of an
impending fire and to prevent smoke from circulating throughout the
building.
KI-DDOS duct smoke detectors consist of an optical tube assembly
and an interface board assembly mounted in a single housing, an
exhaust tube, and a sampling tube. Sampling tubes are ordered
separately.
KI-DDOS duct smoke detectors provide the following status indicators:
• A green power indicator
• An amber test indicator
• A red alarm indicator
KI-DDOS duct smoke detectors require one address on the Signature
signaling line circuit (SLC). Addresses are assigned electronically.
There are no address switches.
For information regarding operation, testing, and maintenance refer to
KI-DDOS Intelligent Duct Smoke Detector Technical Bulletin
(P/N 3102781).
Duct smoke detector limitations
Duct smoke detectors will not operate without electrical power. As fires
frequently cause power interruption, discuss further safeguards with
the local fire protection specialist.
Duct smoke detectors will not operate as designed outside of the listed
electrical and environmental specifications.
Duct smoke detectors will not sense smoke if the ventilation system is
not working properly.
Duct smoke detectors are not intended as substitutes for open area
protection.
© 2023 Carrier
Packing list
KI-DDOS duct smoke detectors ship with the following hardware:
• An exhaust tube
• A conduit ground plate
• A test magnet
• A sampling tube coupler
• A cap plug for the sampling tube
• Two bug screens
• Two silicone gaskets for the air sampling and exhaust tubes
• Sheet metal mounting screws
• A drill template
Installation
Install this device in accordance with applicable national and local
codes, ordinances, and regulations.
Caution: Risk of equipment damage. Using excessive force to tighten
screws may damage the product. Tighten screws firmly, but do not
overtighten. Do not use power tools to tighten screws.
Notes
• Install the duct smoke detector on a flat section of the HVAC duct
between six and ten duct widths from any bends or obstructions.
• Install supply-side duct smoke detectors downstream from the
supply fan and after the air filter.
• Install return-side duct smoke detectors before the return air
stream is diluted by outside air.
• Sampling tubes must extend at least two-thirds across the width of
the air duct. Sampling tubes longer than 36 inches must be
supported at both ends.
To install the device:
1. Drill a small hole in the HVAC duct at the point where the duct
smoke detector is being installed.
Using the SD-VTK Air Velocity Test Kit (ordered separately) and a
suitable air velocity meter, verify that the air velocity in the HVAC
duct falls within the specified operating range of the detector and
note which direction the air flows.
If the air velocity does not fall within the specified range, relocate
the duct smoke detector, and then seal the hole in the HVAC duct.
2. Attach the drill template to the HVAC duct, and then drill (or punch)
the mounting holes where indicated. Remove any rough edges
from the holes.
3. Assemble the duct smoke detector. See Figure 1.
Rotate the sampling tube so the inlet holes face the direction of
airflow.
4. Attach the duct smoke detector to the HVAC duct. See Figure 2.
Secure the duct smoke detector using two sheet metal mounting
screws provided in the hardware kit.
5. Using a suitable air pressure differential meter, verify that the air
pressure differential between the sampling tube opening and the
exhaust tube opening is within the duct smoke detector's operating
specifications. See "Specifications" on page 3.
6. Attach the optical tube assembly and optical tube assembly cover.
See Figure 2.
7. Test for proper operation. See "Testing" on page 3.
1 / 5 P/N 3102775-EN • REV 001 • ISS 30NOV23