Installation Instructions

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Air Duct Monitoring Housing

Model AD2-4W

INTRODUCTION Model AD2-4W from Siemens Industry, Inc., is an air duct

monitoring housing containing sampling tubes. When used

with a PE-11 smoke detector, smoke and combustion

products are detected for shutdown of the duct system and/

or operation of supplementary equipment as provided by the

system control panel. The duct unit supports two sets of

Form C alarm contacts, one Form A alarm contact and one

Form C trouble contact. The trouble contact supervises the

presence of the input power, removal of the detector cover

and the removal of the smoke detector head.

TECHNICAL DATA AIR DUCT CONDITIONS

Temperature Range:

F (0

C) - 100

F (38

C) per UL 268A

Altitude Range:

No altitude limitations

Relative Humidity:

Up to 85% RH (non-condensing/non-freezing)

Air Duct Velocity Range:

100-4000 ft/min

Sampling and Exhaust Tube Pressure Differential Range:

Greater than 0.01 and less than 1.2 inches of water column

These air duct detectors are designed for detection and

control of products of combustion in a duct system. They are

not to be used as a substitution for open area protection.

DO NOT USE air duct detectors with Alarm Verification.

ASSEMBLY This detector has a cover tamper (removal) switch. Care

should be taken when installing the cover. Squarely place the

cover on the unit to aviod possible damage to the switch.

DO NOT SLIDE COVER INTO POSITION.

Siemens Industry, Inc.

Building Technologies Division

P/N 315-049709-3

Siemens Industry, Inc.

Building Technologies Division

Florham Park, NJ P/N 315-049709-3

Siemens Building Technologies, Ltd.

Fire Safety & Security Products

2 Kenview Boulevard

Brampton, Ontario L6T 5E4 Canada

ELECTRICAL RATINGS FOR PE-11

REMOTE ACCESSORIES

SEIROSSECCAETOMER

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If the fire alarm system is connected to a central station or fire

department, or operates external devices such as fans, extin-

guishers, etc., connected, notify appropriate personnel and

disconnect the external devices until all tests are completed.

After testing, reset the system, reconnect the devices, and notify

the personnel that the system is operating again.

ELECTRICAL RATINGS FOR AD2-4W

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The accessories available for use with AD2-4W are:

Summary of content (6 pages)

PAGE 1
If the fire alarm system is connected to a central station or fire department, or operates external devices such as fans, extinguishers, etc., connected, notify appropriate personnel and disconnect the external devices until all tests are completed. After testing, reset the system, reconnect the devices, and notify the personnel that the system is operating again.
PAGE 2
APPLICATION The AD2-4W duct smoke detectors provide early detection of smoke and products of combustion present in air moving through an HVAC duct supply, return, or both. These devices are designed to prevent the recirculation of smoke in areas by the air handling system’s fans and blowers and may be used with fire alarm systems that shut down complete air handling system in the event of smoke detection. DO NOT SPRAY GAS FOR MORE THAN ½ SECOND. OVERUSE OF TEST GAS MAY RESULT IN DETECTOR CONTAMINATION.
PAGE 3
In the event of a fire alarm, certain equipment may be required to be shut down. For example, shut down may be achieved by interrupting the fan supply source to that particular piece of equipment when wired as indicated in Figure 6. Installation Of PE-11 Smoke Detectors To Install: • Remove cover by loosening the four screws. Take off the cover and set it aside. • Align detector with base and insert detector. • Rotate detector clockwise while gently pressing on it until the detector drops fully into base.
PAGE 4
The pressure differential between the input sampling (high pressure) tube and outlet (low pressure) tube for the AD2-4W smoke duct detector should be greater than 0.01 inches of water and less than 1.2 inches of water. 3) 4) 5) Identify a code compliant location (supply or return side, or both) for the installation of the duct unit that will permit easy access for viewing and serviceability.
PAGE 5
TB1 TB3 C- TB+ C+ AL1 P+ C+ AL+ T/R+ INTERCONNECT / REMOTE ACCESSORIES NO COM FACP ALARM 2A FACP ALARM CONTACT 24AC/DC N/O 10A ALARM CONTACT 10A ALARM CONTACT NC COM NO TROUBLE RELAY TB4 N 115H 230H 10A TROUBLE CONTACT* *TROUBLE CONTACTS ARE SHOWN WITH UNIT IN NORMAL STANDBY MODE.
PAGE 6
TUBE SUPPORT ONLY FOR DUCTS GREATER THAN 3 FEET WIDE DUCT WIDTH AIR FLOW DIRECTION INSERT RED STOPPER THIS END OF INPUT TUBE OUTLET TUBE INSTALLED DOWNSTREAM OF AIRFLOW DO NOT INSERT RED STOPPER INPUT TUBE HOLES FACE AIR FLOW NOTE: Mountings shown are typical. Detectors can be installed side, bottom or top of duct as long as proper tube operation and flow/pressure performance is maintained.