1. Affix the adhesive-backed template (Item 1 in diagram) to
the air duct (Item 2). Refer to the appropriate
Installation
Instructions
for information on detector locations.
AD-3I/3ILP
P/N 315-093234
AD-3RI/3RP
P/N 315-086591
AD-3XRI/3XRILP
P/N 315-093235
SA-3I/3P
P/N 315-086593
2. Using the template as a guide:
a. Drill or punch out the two 7/8-inch diameter holes
(Item 3) in the air duct that are needed for sam-
pling tubes (4).
b. Drill or punch out four 1/4-inch diameter holes
(5)-two for the mounting studs (6) and two for the
PEM nuts (7) located on the mounting plate (8).
3. Insert the mounting plate with studs and PEM nuts
inside the duct so that the studs extend out from the
correct holes (9). (If necessary, cut a 12-inch by 12-
inch access hole in the duct, adjacent to the detector,
in order to insert the mounting plate.)
4. Attach two push nuts (10) to the studs to hold the
mounting plate in place.
5. Mount the enclosure (11) on the studs. Place one
gasket (12) on each stud.
6. Mount the air duct detector housing (13) on the studs.
[Note the bonded gaskets (14) included at the rear of
the housing for improved sealing.]
7. Fasten the enclosure and detector housing to the air
duct by fastening them to the studs from the mounting
plate using the flat washers (15), lockwashers (16),
and hex nuts (17) provided.
8. Use two external-tooth lockwashers (18) and two bind-
ing head screws (19) to fasten the detector housing
and enclosure to the PEM nuts located on the mount-
ing plate.
9. Insert the sampling tubes according to the instructions
in the appropriate manual listed in No. 1. Complete the
detector assembly according to the manual.
10. Attach the conduit fitting (20) and grounding bushing
(21) to the enclosure through the appropriate side hole
provided. Attach the conduit, and ground.
CAUTION:
When using a DA-3PS board, it is necessary to
ground the DA-3PS board. Fasten a 14 or 18 AWG wire
from the grounding bushing to the terminal position marked
GND
on TB2 of the DA-3PS board.
11. Cover any unused holes on the enclosure sides with
the plugs (22) provided.
12. Test the detector before completing the housing
assembly according to the
AIR DUCT DETECTOR
manual referred to in Step 9 above.
13. Place the cover of the Model EAD-3 enclosure (23) on
the bonded gasket (24) ringing the face of the enclo-
sure. Fasten the cover to the enclosure with flat
washers (25) and binding head screws (26).
14. Any access hole cut in the duct (Step 3 above) permits
checking and cleaning of the sampling tubes; however,
the hole must be covered and sealed when not in use.
INDEX
Index
No.
Description
Quantity
1
Template
1
2
Air Duct
–
3
Sampling Tube Hole (7/8 in ID)
2
4
Sampling Tube
2
5
Stud and PEM Nut Holes (1/4 in)
4
6
Mounting Stud
2
7
PEM Nut
2
8
Mounting Plate
1
9
Stud Hole in Duct
2
10
3/16 Push Nut
2
11
EAD-3 Enclosure (Back)
1
12
EAD-3 Gasket
2
13
DA-3 Housing Package
1
14
DA-3 Gasket (Bonded)
2
15
No. 10 SS Flat Washer
2
16
No. 10 External-Tooth
SS Lockwasher
2
17
No. 10 SS Hex Nut
2
18
No. 10 External-Tooth SS
Lockwasher
2
19
10-32 x 1 Binding Head Screw
2
20
Conduit Fitting
1
21
Grounding Bushing
1
22
Plug
3
23
EAD-3 Cover
1
24
EAD-3 Gasket (Bonded)
1
25
No. 10 SS Flat Washer
16
26
10-32 x 1/2 Binding Head Screw
16
5 in.
13 in.
15 in.
15 in.
17 in.