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EXHAUST TUBE

SENSOR HEAD

SENSOR MODULE COVER

WIRING COMPARTMENT COVER

WIRING COMPARTMENT

SENSOR MODULE

SAMPLING 

TUBE

NOTE: SENSOR HEAD IS ONLY 

INCLUDED ON SPECIFIED MODELS.

SOLD 

SEPERATELY

[4.2] ] DETERMINE MOUNTING LOCATION AND CONFIGURATION

On ducts wider than 18 inches it is recommended that the detector be 
mounted downstream of a bend, obstruction in the duct, or the supply or 
return air inlet . 

Exception: Installation of duct detectors can be on or within a commercial 
packaged rooftop heating and air-conditioning system, fire/smoke dampers 
and economizers . They may be mounted in either the supply and/or return air 
section as determined by local code .

Once a suitable location is selected, determine if the detector is to be mounted 
in a side-by-side “rectangular” configuration or a top-over-bottom “square” 
configuration as shown in Figure 2 . If mounting in the square configuration, 
remove the rear attachment screw, rotate the unit at hinge, and replace the 
screw into the new attachment hole as shown in Figure 2 . Do NOT remove 
the hinge screw during this process . Final installation approval shall be based 
upon passing differential pressure and smoke entry tests described in the Mea-
surement Tests section .

[4.3] DRILL THE MOUNTING HOLES

Remove the paper backing from the mounting template supplied . Affix the 
template to the duct at the desired mounting location . Make sure the template 
lies flat and smooth on the duct . 

[4.3.1] FOR RECTANGULAR SIDE-BY-SIDE MOUNTING CONFIGURATION:

Center punch at (4) target centers: (2) “A” for sampling tubes and (2) “B” for 
the rectangular configuration mounting tabs as shown on mounting template . 
Drill pilot holes at target “A” centers and cut two 1 .375-inch diameter holes 
using a 1

3

8

-inch hole saw or punch . Drill  .156-inch diameter holes using a 

5

32

-

inch drill at target “B” centers .

[4.3.2] FOR SQUARE TOP-OVER-BOTTOM MOUNTING CONFIGURATION:

Center punch at (4) target centers: (2) “A” for sampling tubes and (2) “C” for 
the square configuration mounting tabs as shown on mounting template . Drill 
pilot holes at target “A” centers and cut two 1 .375-inch diameter holes using 
a 1

3

8

-inch hole saw or punch . Drill  .156-inch diameter holes using a 

5

32

-inch 

drill at target “C” centers . If desired, drill an additional  .156-inch hole at the 
location of one of the mounting tabs on the lower housing .

[4.4] SECURE THE DUCT DETECTOR TO THE DUCT

Use two (rectangular configuration) or three (square configuration) of the pro-
vided sheet metal screws to screw the duct detector to the duct .

CAUTION: Do not overtighten the screws .

[5] SAMPLING TUBE INSTALLATION 

[5.1] SAMPLING TUBE SELECTION

The sampling tube must be purchased separately . Order the correct length, 
as specified in Table 1, for width of the duct where it will be installed . The 
sampling tube length must extend at least 

2

3

 across the duct width for optimal 

performance .

The sampling tube is always installed with the air inlet holes facing into the 
air flow . To assist proper installation, the tube’s connector is marked with an 
arrow . Make sure the sampling tube is mounted so that the arrow points into 
the airflow as shown in Figure 3 . Mounting the detector housing in a vertical 
orientation is acceptable provided that the air flows directly into the sam-
pling tube holes as indicated in Figure 3 . The sampling tube and exhaust tube 
can be mounted in either housing connection as long as the exhaust tube is 
mounted downstream from the sampling tube .

TABLE 1. SAMPLING TUBES RECOMMENDED FOR 

DIFFERENT DUCT WIDTHS:

Outside Duct Width

Sampling Tube Recommended*

Up to 1 ft .

DST1

1 to 2 ft .

DST1 .5

2 to 4 ft .

DST3

4 to 8 ft .

DST5

8 to 12 ft .

DST10 (2-piece)

*Must extend a minimum of 

2

3

 the duct width .

FIGURE 1. EXPLODED VIEW OF DUCT SMOKE DETECTOR COMPONENTS:

H0569-06

REMOVE SCREW AND PIVOT

DETECTOR AS SHOWN BELOW.

REPLACE SCREW

TO SECURE DETECTOR

IN PLACE.

FIGURE 2:

H0550-00

  

I56-3432-006 

 

 04-12

Summary of Contents for Silent Knight SK-Duct

Page 1: ...iated at the fire control panel monitoring the detector and appropriate action can be taken to shut off fans blowers change over air handling systems etc These actions can facilitate the management of toxic smoke and fire gases throughout the areas served by the duct system The SK Duct incorporates a sensor cover tamper feature that provides a trou ble signal at the panel immediately if the cover ...

Page 2: ...R SQUARE TOP OVER BOTTOM MOUNTING CONFIGURATION Center punch at 4 target centers 2 A for sampling tubes and 2 C for the square configuration mounting tabs as shown on mounting template Drill pilot holes at target A centers and cut two 1 375 inch diameter holes using a 13 8 inch hole saw or punch Drill 156 inch diameter holes using a 5 32 inch drill at target C centers If desired drill an additiona...

Page 3: ... greater than 0 15 volts there is enough air flow through the duct smoke detector for proper operation FIGURE 3 AIR DUCT DETECTOR SAMPLING TUBE SAMPLING TUBE ENDCAP ARROW MUST FACE INTO AIR FLOW AIR FLOW DIRECTION CAUTION The sampling tube end cap included with the detector is criti cal to proper operation of the duct smoke detector The end cap is needed to create the proper air flow to the sensor...

Page 4: ...m control panel alarm status and control panel execution of all intended auxiliary functions i e fan shutdown damper control etc Two LEDs on the sensor are controlled by the panel to indicate sensor status Coded signals transmitted from the panel can cause the LEDs to blink latch on or latch off Refer to the control panel technical docu mentation for sensor LED operation and expected delay to alar...

Page 5: ...on to operate 11 2 OPTION 2 REMOTE TEST USING A TEST COIL The use of a remote test station requires the installation of an accessory coil part number DCOIL sold separately 1 Install DCOIL in housing pocket insuring that arrow is pointing toward detector 2 Install DCOIL mounting screw 3 Connect each DCOIL lead to a Test Coil Terminal See Figure 10 below for reference FIGURE 10 SK DUCT USING A TEST ...

Page 6: ...d to Honeywell 12220 Rojas Drive Suite 700 El Paso TX 79936 USA Please include a note describing the malfunction and suspected cause of failure The Company shall not be obligated to replace units which are found to be defective because of damage unreasonable use modifications or alterations occurring after the date of manufacture In no case shall the Company be liable for any consequen tial or inc...

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