SilentKnight SD505-ADHR Addressable Duct Housing w/Relay - Manual (Page 2)

SD505-ADHR Duct Detector Housing With Relay Module & SD505-DTS Installation Instructions
2 P/N 151126
Figure 1: Sampling Tube Orientation
5. Cut intake sampling tube to the desired
length.
6. Firmly insert the provided stopper into the
end of the intake sampling tube.
7. Mount the detector by placing the
detector/sampling tube assembly into
position and secure to duct housing using
mounting screws.
Verify Air Flow and Direction
8. Verify that air velocity is appropriate for the
type of smoke detector you are using by
checking specifications of installation and, if
necessary, by using air velocity meter (Alnor
Model 6,000P or equivalent). See Figure 1.
Air Sampling Verification
9. Verify proper air sampling by using a
differential pressure gauge (Dwyer Model
4000 or equivalent). See Figure 2 for
connections.
Figure 2: Air Sampling Verification
The pressure differential between the input
sampling tube and exhaust tube should be
greater than 0.01” and less than 1.2” of water.
Wiring Instructions
This section contains information on how to
connect the SD505-ADHR to a power source, to
a fan motor, and to a SD505-DTS remote test
station. Wiring must conform to applicable local
codes, ordinances, and regulations covering this
type of device. Refer to NFPA 90A and NFPA
72E for additional information on duct smoke
detector operation and installation.
Figure 3: Wire Routing Example
Important! 1/4" spacing must be maintained between
High and Low voltage circuits; as well as
between power limited and non-power
limited circuits.
Power Connections
The SD505-ADHR can be powered from a 120
VAC, 240 VAC, or 24 VDC/VAC power source.
Note: Only one power source can be used to power the SD505-
ADHR.
Figure 4 illustrates how to connect the various
types of power sources to the SD505-ADHR.
Standard Lengths for Intake Sampling Tubes
STS-2.5 For duct widths of 1.0’ to 2.5’
STS-5.0 For duct widths of 2.5’ to 5.0’
STS-10.0 For duct widths of 5.0’ to 10.0’