Installation Instructions

ManualsBrandsSiemens ManualsFire - Detectors & Peripherals8701 Contact Monitoring Module, Installation Instructions

Air Duct Monitoring Housing

Model 8744

INTRODUCTION Model 8744 from Faraday is an air duct monitoring housing

containing sampling tubes. When used with a 8854 smoke

detector, smoke and combustion products are detected for

shutdown of the duct system and/or operation of supple-

mentary 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 areThey are

They are

not to be used as a substnot to be used as a subst

not to be used as a subst

itit

utut

ion forion for

ion for

open area prot open area prot

open area prot

ectect

ect

ion.ion.

ion.

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 • Florham Park, NJ

Tel: (973) 593-2600 • Fax: (973) 593-6670

Web: www.faradayfirealarms.com

P/N 315-049709FA-3

Summary of content (12 pages)

PAGE 1
Installation Instructions Model 8744 Air Duct Monitoring Housing INTRODUCTION Model 8744 from Faraday is an air duct monitoring housing containing sampling tubes. When used with a 8854 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.
PAGE 2
APPLICATION The 8744 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.
PAGE 3
Detector LED The 8744 contains an LED indicator (located on the 8854 smoke detector) capable of flashing either one of three distinct colors: green, yellow, or red. During each flash interval, the microprocessor based detector checks the following: • for smoke in its sensing chamber • that its critical smoke sensing electronics are operating.
PAGE 4
The pressure differential between the input sampling (high pressure) tube and outlet (low pressure) tube for the 8744 smoke duct detector should be greater than 0.01 inches of water and less than 1.2 inches of water. 3) 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
Duct Preparation 6) Where possible, install duct detectors upstream of air humidifiers and downstream of dehumidifiers. 7) To prevent false alarms, the duct detector should not be mounted in areas of extreme high or low temperatures, in areas where high humidity exists, or in areas where the duct may contain gases or excessive dust.
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.
PAGE 7
Air Duct Sampling Tube Pressure Measurement The Model 8883 Pressure Differential Measuring device should be used to ensure that the sampling tube pressure differential is within the specified limits. The differential pressure between the two tubes should be greater than 0.01 inches of water and less than 1.2 inches of water. Qualified personnel should take measurements in accordance with the 8883 instructions, P/N 315-085535FA.
PAGE 8
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 24VAC, 50/60Hz, 0.4A MAX OR 24VDC, 0.25A MAX INPUT POWER TB2 230VAC 115VAC 50/60Hz 50/60Hz 0.2A MAX 0.2A MAX NC COM NO ALARM RELAY 1 NC COM NO ALARM RELAY 2 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 9
SAMPLE CONTROL PANEL WIRING - STYLE D / CLASS A IDC (Supervised - A fault condition will not inhibit an alarm response) N.C. TROUBLE CONTACT N.C. TROUBLE CONTACT UL Listed Conventional Fire Alarm Control Panel N.O. ALARM CONTACT N.O. ALARM CONTACT 8744 8744 SAMPLE CONTROL PANEL WIRING - STYLE B / CLASS B IDC (Supervised - A fault condition will not inhibit an alarm response) N.C. TROUBLE CONTACT N.C. TROUBLE CONTACT UL Listed Conventional Fire Alarm Control Panel N.O.
PAGE 10
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 8854 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 11
DO NO T SPRA Y GA S FOR MORE THAN ½ SECOND VERNOT SPRAY GAS SECOND.. O OVERUSE OF TES T GA S MA Y RESUL T IN DETECT OR CON TAMITEST GAS MAY RESULT DETECTOR CONT NA TION. NATION. After 15 to 20 seconds the detector will go into alarm, illuminating the detector LED and causing the duct unit functions to operate; alarm relays will change state, and the alarm related remote accessories, if attached, will function.
PAGE 12
If the fire alarm sy st em is connect ed to a central st at ion or fire syst stem connected stat ation depar tment, or operat es ext ernal devices suc h as fans, ext indepartment, operates external such extinguishers, etc., connect ed, not ify appropriat e personnel and connected, notify appropriate disconnect the ext ernal devices unt il all ttests ests are complet ed. external until completed.