DH1851AC SYSTEMSENSOR | Alldatasheet

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MODELS | C 1(0)[ 25 of r ICo 5 In PHOTOELECTRONIC DH 85) | AGA yt i B51DG | AND IONIZATION JU UOYMUL WA JMO | alg RUGLN = UHZOIAGAUTZOOIDG) p Sa = = = eee | eries | Duct Detectors | am el ie : 7 } = | | Wn) Viet i Pm | : ied Hy lt i CD) "| ieee ieee Wc) all Ie " 7 He Cup . | ¢ Accommodates both ionization and | | photoelectronic smoke detector heads | ¢ 2/4 wire DC operation or 4 wire AC operation | | ¢ Mounts easily and quickly to round or | rectangular ducts ¢ Handles air velocities from 300 to 3000 FPM * UL listed (268A) | BRK quality, coupled with ease of installation and a duct and permits the detection of a developing fire. | maintenance, makes this duct detector the industry Either model gives dependable performance for rapid ] standard, shutdown of fans, blowers and air conditioning | systems, thereby preventing the rapid spread of toxic The BRK DH1851/DH2851 duct housing will accom- modate either the 1851DH ionization detector or the smoke anal lreigasee\\liougt thes prolaciea area 2851DH photoelectronic detector. The twist in—twist All models come with one 8” exhaust tube. Sampling | out detector and base allow the removal of detectors tubes are available to fit ducts from 1’ to 10’ wide. easily and quickly for cleaning and maintenance. In Plug-in relay module (AR-10) is used for 4-wire 24VDC Baa cerecor ade can be changedtofitthe ap- —_ operation. AC models include the AR-10 relay module. DUCStCH Wet aces DOusine lenteval: BRK’s duct detector “Applications and Installation In- Once installed, the DH1851/2851 series duct housing structions” should be used for reference as well as provides the sampling of air currents passing through BRK’s ‘Applications Manual for Systems Detectors.”

piissiac ~—«~BHzesiDG = rzestDG ARCHITECT ENOL SPECIFICATIONS —DH2851AC (2-wire) (4-wire*) SPECIFICATIONS Roo man} «= SO many Electronics Model DH1851AC or DH1851DC Curgern-Conaumption 15ma 400 ‘A o1185100) "poi etiam ionization detector or Model DH2851AC or (TYP). vs vos TSOLAONEESIDG) 106 Na DHeaSIDG photoelectronic detector. The detec- Alar occ cee cee 18OMA 20-300mA (MUST 120mA for housing shall be UL listed per UL268A enn par Bs fad by Panel) sear NZ ae Ot use In air henelngsyeiems. The oN doe PN aa per minute to 3000 feet per minute. ESE SORE, «13 0 in ES ey it i ¢ Either 2-wire or 4-wire Class A or Class B super- 120VAC 120VAC visory configuration shall be available. Changing from 2-wire to 4-wire operation is provided by the Max. othe Relay interface directly with BRK RM851DH Remote Segerahurt ——_—_ = OO Test Station, which shall provide reset and detec- Weight (approx.) 7 Ibs. detector housing shall be equipped with an in- “Requires optional AR-10 relay. Addition of this plug-in relay allows standard 2-wire tegral mounting base capable of accommodating detectors to be converted for 4-wire operation. either photoelectronic or ionization detector heads. It shall be capable of local testing via HELEN? magnetic switch, MOLDED Rib / => , \\ Iea>< TERMINAL. STRIP The duct detector housing shall be molded e ng A y Wanting Coven NORYL® plastic and shall incorporate an airtight ~ Ak 3 ¢ smoke chamber in compliance with UL268A, sat Zan GrtR font ” Standard for smoke detectors for duct applica- GASKET AIA gE Seo” [eten wy, tions. The housing shall be capable of mounting AES Sy meTgeMNG —~ Z to either rectangular or round ducts without AN Sn os —_ Bl adapter brackets. An integral filter system shall DaEGTOR ¢ 2wDe (7 SS, Ae A be included to reduce dust and residue effects on A PA ne Qy / aL detector and housing, thereby reducing Skuta A S&S IO is maintenance and servicing. Sampling tubes Te arom PO¢ ™~. shall be easily installed after the housing is WeAD Vy S | Lb ™ mounted to the duct by passing through the duct SAMPLING. —Y _ ve ~ housing. FORE Ses r | yy “ ! ; PETER Gren Me v Terminal connections shall be of the strip and Formas savin |.” Sa 88s clamp method suitable for 12-18 AWG wiring. Wir- oe ‘ ~ ing shall be connected to a terminal strip and be EXPLODED VIEW OF COMPONENTS Ny so noted and numbered. OF DUCT DETECTOR HOUSING DH1851AC —120VAC Ionization Duct Detector. Exhaust tube included. Sampling tube purchased separately. DH1851DC ——_20/24VDC Ionization Duct Detector. Exhaust tube included. Sampling tube purchased separately. DH2851AC —120VAC Photoelectronic Duct Detector. Exhaust tube included. Sampling tube purchased separately. DH2851DC —20/24VDC Photoelectronic Duct Detector. Exhaust tube included. Sampling tube purchased separately. PST851DH-1.5 Polycarbonate Plastic” Sampling tube for DH1851/DH2851 Series Duct Detector. For duct widths of 1’ - 2! PST851DH-3 Polycarbonate Plastic” Sampling tube for DH1851/DH2851 Series Duct Detector. For duct widths of 2’ - 4! PST851DH-5 Polycarbonate Plastic’ Sampling tube for 0H1851/DH2851 Series Duct Detector. For duct widths of 4" - 8% PST851DH-10 Polycarbonate Plastic” Sampling tube for DH1851/DH2851 Series Duct Detector. For duct widths of 8’ - 10’ RM851DH Remote Test Station for 0H1851/DH2851 Series Duct Detectors. Remote key lock assembly includes alarm LED. A77-669-00 Remote Alarm Lamp (LED) assembly with rectangular mounting plate (4%" x 2%"). (AR-10 must be ordered for each detector used on DC 4-wire circuits.) A1358 Replacement filters ATT-716-02 —_End of line relay 20/24VDC *Metal sampling tubes are available upon special request. Distributed by: BRK ELECTRONICS System Sensor Division

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Aurora, Illinois 60504 Printed in US.A, COHa51 7185