System Sensor INNOVAIR DH100ACDCLWP - Manual (Page 4)

NOTE: An alternate method to using the ST-10 is to use
two ST-5 sampling tubes. Remove the flange from
one of the tubes and install as described above.
After the installation, use electrical tape to close off
some of the sampling holes so that there are a total
of 10 to 12 holes spaced as evenly as possible
across the width of the duct.
NOTE: Air currents inside the duct may cause excessive
vibration, especially when the longer sampling
tubes are used. In these cases a 3 inch floor flange
(available at most plumbing supply stores) may be
used to fasten the sampling tube to the other side
of the duct. When using the flange/connector
mounting technique, drill a 1-inch to 1
1 /
4
-inch hole
where the flange will be used.
[5.5.3] Modifications of Sampling Tubes
There may be applications where duct widths are not what
is specified for the installation. In such cases, it is permis-
sible to modify a sampling tube that is longer than neces-
sary to span the duct width.
Use a 0.193-inch diameter (#11) drill and add the appropriate
number of holes so that the total number of holes exposed to
the air flow in the duct is 10 to 12. Space the additional holes
as evenly as possible over the length of the tube.
NOTE: This procedure should only be used as a temporary
fix. It is not intended as a permanent substitute for
ordering the correct length tubes.
[5.6] Install The Filters
To install the sampling tube filters, simply push the filters
into the sampling and exhaust tube holes, as shown in
Figure 5.
Figure 5. Sampling tube filter installation:
Filters require periodic cleaning or replacement, depending
on the amount of dust and dirt accumulated. Visually
inspect the filters at least quarterly; inspect them more
often if the dust accumulation warrants it. See Section [6]
for more information. For replacement filters, contact your
Innovair distributor. (Exhaust tube/intake tube filter P/N
F36-09-11)
CAUTION
[5.7] Field Wiring
Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction. Proper wire gauges should be used. The conduc-
tors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring, (the wiring between interconnected
detectors or from detectors to auxiliary devices), it is usu-
ally recommended that single conductor wire be no small-
er than 18 gauge. The duct smoke detector terminals
accommodate wire sizes up to 12 gauge. In order to achieve
NEMA 4 environmental protection, watertight conduit and
fittings must be used when installing the DH100ACDCLWP.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance allowed for the particular model control
panel being used before wiring the detector loop.
Wiring Instructions
The DH100ACDCLWP detectors are designed for easy
wiring. The housing provides a terminal strip with clamp-
ing plates. Wiring connections are made by stripping about
3 /
8
-inch of insulation from the end of the wire, sliding the
bare end under the plate, and tightening the clamping plate
screw.
[5.8] Perform Detector Check
1. Perform STANDBY AND TROUBLE TEST per Section
[6.2.1].
2. Perform MAGNET TEST per Section [6.2.2.1]. The
RTS451 test of Section [6.2.2.2] may substitute for this
requirement.
3. Perform AIR FLOW TEST per Section [6.1.1].
4. Perform SMOKE RESPONSE TEST per Section [6.1.2].
5. Perform SENSITIVITY TEST per Section [6.2.3].
[5.9] Install The Cover
Install the cover using the six screws that are captured in
the housing cover. Be certain filters are installed as speci-
fied in Section [5.6]. Make sure that the cover fits into the
base groove and that all gaskets are in their proper posi-
tions. Tighten the six screws.
[6] Duct Smoke Detector Maintenance And Test
Procedures
As recommended in NFPA 90, all smoke detection devices
designated for automatic shutdown shall be tested annually.
The tests in this manual are designed to assist installation
and maintenance personnel in verification of proper detector
operation.
D200-24-00 4 I56-0056-07R