Hochiki DH-100-P User manual

HOCHIKI AMERICA CORPORATION
7051 Village Drive Suite 100 * Buena Park, CA 90621-2268
Phone: [phone] * Fax: [phone]
Technical Support: 800/845-6692 or [email protected]
II. MOUNTING THE DETECTOR
The sampling tubes may be ordered to a desired length or ordered in one of 3 standard
lengths and cut per requirements. The intake sampling tube consists of a piece of steel
piping with a series of holes drilled the entire length of the tube and should extend the
entire width of the duct. The holes must be facing into the air flow (see Figure 2). The
exhaust tube consists of a piece of steel piping approximately 7-1/2" long.
1. Remove paper backing from mounting template (packaged in installation kit) and affix to duct at desired location on the side or top of duct.
2. Using template as a guide, drill 4 mounting holes (3/32" diameter) for duct mounting screws (4 #12 x 1/2" sheet metal screws packaged in installation kit).
Drill or punch holes for sampling tubes in air ducts (1-3/8" diameter), using template as a guide. Clean all holes.
To prevent false alarms the detectors should not be mounted in areas of extreme high or low temperatures, in areas where
high humidity exist, or in areas where duct air may contain gases or excess dust. The duct detector should, when possible, be
located a minimum of six duct widths downstream from a source of turbulence (bends, inlets, or deflection plates). At these
locations, air flow is less turbulent and the air/smoke mixture should be more homogenous.Refer to NFPA 90A, 72, and 101
for more information. See Figure 1.
Exception: Where it is physically impossible to locate the duct detector accordingly, the duct detector can be
positioned closer than six duct widths, but as far as possible from inlets, bends, or deflection plates.
These are Installation Instructions (DWG.# HA-06-249) for the DH-100-P Duct Detector configured as follows:
Duct Housing with the SOC-24DH Conventional Photoelectric Smoke Detector
INSTALLATION INSTRUCTIONS: DH-100-P FOUR-WIRE DUCT SMOKE DETECTOR
A. DUCT PREPARATION
The Duct Detectors are designed for use in ducts where the air velocities are from 1,000 to
4,000 feet per minute. See Figure 2 for sampling tube orientation to air flow direction.
DH-100-P
With power source de-energized, wire all connections per instructions on pages 2-3. The wiring access
hatch cover can be stored at the top of the unit. Return cover before restoring power.
Wiring must conform to applicable local codes, ordinances and regulations covering these types of devices.
Wire the detectors according to the engineering drawings for the particular job requirements. These detectors
are not intended for open area protection, nor should they be used for open air protection. Refer to NFPA 90A
and NFPA 72 for general and additional information on Duct Smoke Detectors concerning operation and
installation. Terminals are suitable for up to #14 gauge wire.
To verify proper sampling of air, use a Dwyer Model 4000 differential pressure gauge (or equivalent). See Figure 5
for gauge connections (SOC-24DH detector not shown). The pressure differential between input sampling tube
and exhaust tube should be greater than 0.01" of water and less than 1.2" of water. Return cover and tighten captive
screws. Ensure the catch is engaged by pushing from the outside. There should be a solid green pilot indication.
Indication is independent of seal integrity.
Move duct housing/sampling tube assembly to desired location. Use 4 mounting screws
(4 #12 x 3/4") sheet metal screws, packaged in installation kit) to secure the housing to
the air duct.
1. Sampling tube connectors are equipped with set screws, which allow the tubes to be
mounted only in directions shown in Figure 2. Establish proper orientation
considering airflow direction.
2. Insert intake and exhaust tubes into connectors, align set screw to set screw hole in
tubes and tighten firmly.
1. Cut the intake sampling tube to the desired length.
2. Firmly insert the stopper (packaged in installation kit) in the end of the INTAKE sampling tube.
INTAKE SAMPLING TUBES STANDARD LENGTHS:
III. ELECTRICAL INSTALLATION
FIGURE 5. AIR SAMPLING VERIFICATION
For duct widths of 1.0' to 2.5'
For duct widths of 2.5' to 5.0'
For duct widths of 5.0' to 10.0'
EXHAUST TUBE
HOLE &
CONNECTOR
LOW
PRESSURE
STS-2.5
STS-5.0
STS-10.0
HIGH
PRESSURE
INTAKE TUBE
HOLE &
CONNECTOR
Hochiki America Corporation *DH-100-P Installation Instructions (HA-06-249. P/N 1700- 12442, Page 1 of 2) 04/20
B. VERIFY AIR FLOW AND DIRECTION
C. SAMPLING TUBE ASSEMBLY (See Figure 2)
D. MOUNT SAMPLING TUBES (See Figure 2)
E. MOUNT THE DUCT HOUSING (See Figure 1B & 2)
G. VERIFY AIR SAMPLING (See Figure 3)
A. GENERAL INFORMATION
B. DETECTOR WIRING
I. LOCATION REQUIREMENTS
Remove the access hatch cover by removing tamper screw if installed, and depressing the tab.
Unscrew the 4 screws on the top of the duct housing, screws are captive in the housing. Push
the catch inside the access cover down to release the cover.
F. COVER REMOVAL (See Figure 1B & 2)

Magnet Test:
Testing can be accomplished with the cover installed or removed. Place the magnet (HA Part #0700-01117
or suitable bar magnet) on the detector as shown in Figure 4 / Figure 5 for approximately six (6) seconds to
activate the alarm LEDs and relays. This test will verify that the detector is within its intended limits.
Model DH-100-P Automatic Verfication:
The detector has a built-in sensitivity window verification feature. If the detector is within its calibrated
sensitivity range the detector LEDs will flash Green in standby or normal operation. If the detector drifts
outside its sensitivity range the LEDs will flash Red to indicate an out of sensitivity condition.
Smoke Test Port:
The DH-100 Series has a smoke port for the introduction of smoke or simulated smoke without cover
removal by lifting the port tab. To test with aerosol smoke, use a 1
2inch diameter pipe (or equivalent) at the
manufacturer's recommended minimum length to introduce the aerosol into the port. Press the pipe against
the detector housing and spray from the opposite pipe end, pipe elbows can be used. The amount of
aerosol is dependent on the duct air velocity, see below for estimated activations:
1,000-2,000 FPM: 3 seconds, 1 activation
2,000-3,000 FPM: 4 seconds, 1 activation
3,000-4,000 FPM: 4 seconds, 2 activations
The port must be closed after testing to avoid air leakage from the duct.
Test Switch:
Pressing the test switch will test the alarm relays, it will not test the detector's sensing element. The switch
must be pressed to reset the detector after an alarm activation.
FIGURE 8. DH-100-P TEST LOCATIONS
D. WIRING DIAGRAMS
ALARM
CONTACTS
10A 115/230VAC
7A 28VDC
All contacts are shown in normal supervisory
condition. Alarm contacts will toggle during alarm
or test switch activation. Trouble contacts will
toggle to trouble condition if detector is removed.
Alarm contacts must be reset by pressing the reset
switch after activation.
REMOTE
ACCESSORIES
TROUBLE
CONTACTS
10A 115/230VAC
7A 28VDC
ALARM
CONTACTS
0.5A 115VAC
1A 24VDC
Hochiki America Corporation *DH-100-P Installation Instructions (HA-06-249. P/N 1700- 12442, Page 2 of 2) 04/20
* Individual Remote Pilot LED's must be installed to monitor detector head or power source removal for each unit.
19
18
ALARM
STROBE/
HORN
Positive
Negative
ALARM
LED
i. REMOTE ACCESSORY WIRING
ii. FIRE ALARM CONTROL PANEL WIRING
iii. COMMON FUNCTION WIRING
19
18
17
UL LISTED
FIRE ALARM
CONTROL
UNIT
+
-
DH-100-P #1
DH-100-P DETECTOR
#1
12
INTERNALLY
LIMITED
20mA, 24 VDC
Negative
Positive
16
20
19
17 Key or
Push Button
"Test/Reset"
Switch
PILOT
LED
DH-100-P #30
EOLR
END
OF
LINE
RESISTOR
19
17
18
DH-100-P #2
13
14
12
15
DH-100-P DETECTOR
#2 or END
15
14
13
19
17
18
REMOTE COMMON TEST/RESET
REMOTE COMMON ALARM
REMOTE COMMON AUX POWER
COMMON AUX GROUND
INTERNALLY
LIMITED
20mA, 24VDC
20 20 20
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
24VAC 60Hz/
24VDC INPUT
115~230 VAC
60Hz INPUT
G N L + -
Up to 30 units may be interconnected for all alarm relays to
operate with a single alarm. Terminals 17 and 19 are optional
E. TESTING THE INSTALLATION
24 VDC