Installation Sequence; Verify Duct Air Velocity; Drill The Mounting Holes; Mount Duct Housing - Honeywell 14506873-001 Installation Instructions Manual

INSTALLATION SEQUENCE

Step 1. Verify duct air flow direction and velocity ................................................................................................................2
Step 2. Drill mounting holes ................................................................................................................................................2
Step 3. Mount duct housing ................................................................................................................................................3
Step 4. Install inlet tube ......................................................................................................................................................3
Step 5. Complete field wiring ..............................................................................................................................................5
Step 6. Install filters..............................................................................................................................................................7
Step 7. Perform detector check ..........................................................................................................................................7
Step 8. Install cover ............................................................................................................................................................9
Step 9. Perform final system check (Testing) ......................................................................................................................9
STEP 1. VERIFY DUCT AIR FLOW DIRECTION AND VELOCITY
The 14506873-001 is designed to be used in air handling systems having air velocities of 500 to 4000 ft (152.5 to 1219
m) per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these
parameters. If necessary, use a velocity meter to check the air velocity in the duct.
STEP 2. DRILL MOUNTING HOLES
Remove the paper backing from the drilling template. Affix the template to the air duct at the desired mounting location.
Make sure the template lies flat and smooth on the air duct. Center punch hole targets and remove the template. Drill the
holes as indicated on the template. Slide the two speed nuts over the two small holes (Hole A) next to the sampling tube
bushing holes (Hole B) previously drilled in the duct. (See Figure 2.)
Location of detectors mounted in or on air ducts should be at least six duct widths downstream from any duct openings,
deflection plates, sharp bends, or branch connections.
Exception: Where it is physically impossible to locate the detector accordingly, the detector can be positioned closer than
six duct widths, but as far as possible from the opening, bend, or deflection plates.
STEP 3. MOUNT DUCT HOUSING
Remove the duct housing cover. Slide the foam gaskets over the tube bushings as shown in Figure 2A. Make sure the
two small holes in the gaskets line up with the two duct housing mounting holes. Put one 5/16-inch O-ring over each of
the two #10 sheet metal screws. Use the two sheet metal screws to secure the duct housing to the duct.
HOLE B
HOLE A
A78-2046-00
Figure 2. Speed Nut Mounting Location.
TABLE 1. SAMPLING (INLET) TUBES
TUBE OUTSIDE DUCT WIDTH
SSDST-1.5 1 to 2 ft.
SSDST-3 2 to 4 ft.
SSDST-5 4 to 8 ft.
SSDST-10 8 to 12 ft.
H500-03-00
CAUTION: Do not overtighten the screws.
DUCT
WALL
SPEED
NUT
(30 to 61 cm)
(61 to 122 cm)
(1.2 to 2.4 m)
(2.4 to 3.7 m)
3
INLET SAMPLING
MOUNTING TUBE BUSHING
SCREWS
O-RINGS
SCREW HOLES FOR ATTACHING
DETECTOR HOUSING TO DUCT
Figure 2A. Installation of Foam Gaskets Over
Sampling Tube Bushings.
DUCT DETECTOR
HOUSING
EXHAUST TUBE
(EXTENSION BUSHING)
FOAM GASKETS
I56-475-09R
PAGE
A78-2449-00