Johnson Controls METASYS DH500 Series User manual

Fire Initiating Devices and Notification Appliances Technical Manual 408
Intelligent Products Section
Technical Bulletin
Issue Date 1095
© 1995 Johnson Controls, Inc. 1
Code No. LIT-408095
Introduction Page 3
● General Description 4
Installation Procedures 9
● General Information 9
● Installation 10
● Mounting 11
● Wiring Installation Guidelines 16
Testing and Maintenance Procedures 21
● Testing 21
● Testing Alarms 22
● Maintenance 26
● Detector Test Log 30
● Limitations 31
DH500 Series Intelligent Air Duct Smoke Detector

2 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector

Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector 3
Introduction
This document contains important information about installing and
operating the Johnson Controls DH500 series intelligent air duct smoke
detector. If you install this detector for someone else to use, you must
leave a copy of this document with the user. The DH500 series duct
detector is listed per UL 268A.
These instructions provide information regarding mounting, wiring,
installation, testing, and maintenance. Follow only those instructions that
apply to the model you are installing.
Before you install any DH500 series intelligent air duct smoke detectors,
read and be familiar with:
●the control panel system installation manual
●the requirements of the authority having jurisdiction
●National Fire Protection Association (NFPA)-72-National Fire
Alarm Code and NFPA-90A, Installation of Air Conditioning and
Ventilation Systems
●System Sensor Guide for Proper Use of System Smoke Detectors
Technical Bulletin in the Fire Initiating Devices and Notification
Appliances Technical Manual (FAN 408), which provides detailed
information on detector spacing, placement, zoning, wiring, and
special applications
●or, for non-United States installations, applicable codes and standards
specific to country and locality of installation
Failure to follow these directions may result in failure of this device to
report an alarm or trouble condition or respond properly to an alarm
condition. Johnson Controls is not responsible for devices that have been
improperly installed, tested, or maintained by others.
As is the case with all installations under NFPA, Underwriters
Laboratories of Canada (ULC), or Canadian Electrical Code classification,
final written approval of permissible operation and configuration rests
with the authority having jurisdiction.

4 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector
A Heating, Ventilating, and Air Conditioning (HVAC) system supplies
conditioned air to virtually every area of a building. Smoke introduced
into this air duct system will be distributed to the entire building. Smoke
detectors designed for use in air duct systems are used to sense the presence
of smoke in the duct and initiate action to prevent the spread of smoke.
The DH500 series air duct detector housings are used with the intelligent
1551J ionization detector heads and 2551J photoelectronic detector heads.
These two smoke detection methods are combined with an efficient
housing design that samples air passing through a duct and allows early
detection of a developing hazardous condition. When sufficient smoke is
sensed, an alarm signal is initiated at the fire control panel monitoring the
detector, and appropriate action can be taken to shut off fans, blowers, and
change over air handling systems. This can prevent the distribution of
toxic smoke and fire gases throughout the areas served by the duct system.
There are two models of the duct smoke detector: the DH500J, which has
auxiliary relays that allow for optional fan control, alarms, etc. and
operates on 120/240 VAC or 24 VAC/DC; and the DH502J, which has no
auxiliary relays and operates on 24 VDC. Both models have two Form-C
alarm activated relay output contacts that are available for local control
purposes and two Light Emitting Diodes (LEDs) on each detector latch on
to provide a local alarm indication. Remote alarm indication is made
possible by utilizing the 12 volt alarm output to connect to the RA400Z
remote annunciator. By using the correct code commands from the fire
alarm control panel, the duct detector can be tested and the alarm can be
reset. See the panel instructions for details.
Table 1: Contents of the Duct Detector Housing Kit
Number Item
1Complete Housing Base and Cover Assembly
2No. 10 Sheet Metal Mounting Screws
2Sampling Tube Filters
1Test Magnet
1Drilling Template
25/16-in. O-rings
2Foam Gaskets
4No. 6 Self-tapping Mounting Screws for the Sampling Tube
1Filter Adapter
1Inlet Tube End Plug
2No. 10 Speed Nuts
General
Description

Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector 5
Order the inlet sampling tube and a smoke detector head (1551J for
ionization or an 2551J for photoelectronic) separately. The sampling tube
selected must be the correct length for the width of the duct where it will
be installed. To determine the inlet tube required for different duct widths,
see Table 4: Sampling Inlet Tubes in the Mounting, Mount Duct Housing
section of this technical bulletin.
Figure 1: Duct Detector Housing Kit
Foam
Gasket
Detector Base
Exhaust Filter
Adapter
Conduit Holes
Detector Head
(
Supplied Separatel
y
)
Samplin
g
Tube
Filters
Cover
Screws
Samplin
g
Tube
Mountin
g
Screws
DuctDetector
Cover
(
Clear Plastic
)
Tube End
Plu
g
Duct Detector
Housin
g
Terminal Strip
PC Board
Insulator
dh500
j
-1
Test Ma
g
net
Inlet Samplin
g
Tube
(
Supplied Separtel
y
)
O-rin
g
s
Housin
g
Mountin
g
Screws

6 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector
Table 2: Specifications Summary
Specifications
Length 14.5 in. (368.3 mm)
Width 5 in. (127 mm)
Depth 4 in. (101.6 mm) DH500J
3.5 in. (88.9 mm) DH502J
Weight 4 lb (1820 g) DH500J
2 lb, 8 oz (1130 g) DH502J
Operating Temperature Range 32 to 120°F (0 to 49°C)
Operating Humidity Range 10 to 93% Relative Humidity
Duct Air Velocity 300 to 4000 ft/min. (91.4 to 1219.2 m/min.)
Relay Contacts (DH500J) Two Alarm Activated Form-C
Minimum contact current must be greater than 500 mA.
10A @ 30 VDC
10A @ 277 VAC (0.75 power factor)
240 VA @ 240 VAC (0.4 power factor)
1/8 hp @ 120 VAC
1/4 hp @ 240 VAC
Accessories Part Number
Remote LED RA400Z
Piezo Alert Sounder PA400
Replacement Filters F36-05-00
Magnet M02-04-00
End Plug For Sampling Tube P48-21-00
Installation Kit (Parts bag) A2650-01 DH500J
A2650-00 DH502J
Photoelectronic Replacement
Screen RS24
Ionization Replacement Screen RS14
Sensitivity Test Kit MOD400 or MOD400R
Ionization Cover Removal Tool CRT400
Remote Test Station RTS451
Calibrated Test Card
(for photo units only) R59-18-00
Sampling (Inlet) Tubes
Tube Outside Duct Width
ST-1.5 1 to 2 ft (300 to 600 mm)
ST-3 2 to 4 ft (600 to 1200 mm)
ST-5 4 to 8 ft (1200 to 2400 mm)
ST-10 8 to 12 ft (2400 to 3700 mm)DH500J
8 to 10 ft (2400 to 3700 mm)DH502J

Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector 7
Table 3: Power Supply Electrical Ratings
DH500J (With Relays)
Power
Requirements 120 VAC 102-132 mA
RMS Maximum
240 VAC
204-264 mA
RMS Maximum
24 VAC
20.6-26.4 mA
RMS Maximum
24 VDC
20-30 mA
DC Maximum
Device Standby Alarm Standby Alarm Standby Alarm Standby Alarm
DH500J 44 52 25 30 65 182 26 87
PA400* -- 3 -- 1.5 -- 29 -- 15
RA400Z* -- 1.5 -- 1 -- 17.3 -- 7
RTS451* -- 1.5 -- 1 -- 17.3 -- 7
RTS451** 11.5 13 5.5 6.5 140 157 71 78
* All accessory currents are additional to DH500J. There are no additional currents for accessories in standby.
** RTS451 when the magnet is held in place to initiate an alarm.
Output Maximum Load Rating
24V 80 mA
12V 20 mA
DH502J (Without Relays)
Voltage Range 15-28 VDC peak
Standby Current (nominal) 200 Microampere at 24 VDC
Power-up Surge at Maximum Rated Voltage 1.5 Milliampere/second
LED Current (nominal) 6 Milliamperes at 24 VDC

8 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector
Smoke detector models 1551J and 2551J can be used with the DH500
series if the following constraints are observed:
1. There may be a limit to the number of devices per Signaling Line
Circuit (SLC) that can have their LEDs latched on.
The actual number of devices is determined by the control panel and
its ability to supply LED current. As seen with software Release 1
(Firmware Group M34 or earlier) for the IFC-2020 system, the control
panel stops latching device LEDs on after four device detectors
indicate an alarm.
The maximum number of devices that can be latched in an alarm state
at one time is four. If more than the maximum number of devices are
on the same SLC, do not use the DH500 series for control purposes.
Control for duct applications would need to come directly from the
control panel or by using control modules.
2. For the IFC-1010 systems with any level of software and for the
IFC-2020 systems that use Release 2 (Firmware Group M35) or
higher and have intelligent detectors and modules with the R4
marking on their label:
●The LED restriction does not apply.
●All LEDs may be latched on.
●Consult the IFC product line programming manuals for
additional information.
3. When FC-2000 control panels are used with AM-200 modules, they
may ignore the LED restriction by selecting the “FL” full LED
control. Consult the AM-200 manual for further information.
4. The duct control circuitry (auxiliary relay contacts and 12 volt alarm
output) may operate (change states) if the detector is tested and the
LED is turned off for more than four seconds.
5. If the time the LED is latched on is less than four seconds, the relay
and remote annunciator control circuitry of the DH500 series will not
operate.
6. The following systems must use the 1551J with the DH500 series
models when high sensitivity is selected:
●FC-2000 panels with AM-200 modules
●IFC-2020 software Release 1 (Firmware Group M34 or earlier)
Programming
Requirements for
Intelligent
System Control
Panels

Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector 9
Installation Procedures
This section contains installation information for DH500 series intelligent
air duct smoke detectors. Instructions are given for wiring the detector,
and basic installation information is provided.
!
CAUTION: Equipment damage hazard. This device cannot
operate without electrical power. This device
will not sense smoke unless the ventilation system
is operating.
Frequently, fire situations may cause an interruption of power to the
detector. The system safeguards should be discussed with your local fire
protection specialist.
For this detector to function properly, it must be installed according to the
instructions in this document. The detector must be protected from the
elements and operate within all electrical and environmental specifications
described in this technical bulletin. Failure to comply with these
requirements may prevent the detector from activating when smoke is
present in the air duct.
General
Information

10 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector
1. Verify duct air flow direction and velocity.
2. Drill the mounting holes.
3. Mount duct housing.
4. Install the inlet tube.
5. Complete the field wiring.
6. Install the filters.
7. Perform the detector check.
8. Install the cover.
9. Perform the final system check as described in the Testing section of
this technical bulletin.
The DH500 series is designed to be used in air handling systems having
air velocities of 300 to 4000 feet per minute.
1. Be sure to check engineering specifications to ensure that the air
velocity in the duct falls within these parameters.
2. If necessary, use a velocity meter to check the air velocity in the duct.
Installation
Installation
Sequence
Verify Duct Air
Flow Direction
and Velocity