Edwards SIGA-HFD Signature Series Intelligent Fixed Temperature Heat Detector, 135F

Edwards SIGA-HFD — Signature Series intelligent heat detector with a 135 °F fixed-temperature sensor and no rate-of-rise element.

Fixed temperature alone is deliberate for spaces that see legitimate fast temperature swings, where a rate-of-rise element would read normal activity as a fire. The loop controller maps each device serial number against its neighbours, so a detector taken down for cleaning cannot quietly be put back in a different place.

• Fixed rating 135 °F (57.2 °C), actual alarm point 129 to 141 °F
• Operating voltage 15.20 to 19.95 VDC from the Signature loop
• Maximum certified spacing 50 ft (15.2 m) centers
• Operating environment 32 to 100 °F, 0 to 93% RH
• Up to 250 Signature devices per loop; bicolor status LED
• UL 521 and CAN/ULC-S530 certified

SIGA-HRD is the same detector with a 15 °F per minute rate-of-rise element added at the same fixed point. The older SIGA-HFS and SIGA-HRS are a different generation certified at 70 ft spacing rather than 50 ft, so a layout drawn for one does not carry over. Bases are ordered separately: SIGA-SB, SIGA-RB, SIGA-IB and SIGA-AB4G.

Documents

• SIGA-HRD / SIGA-HFD Intelligent Heat Detectors — Data Sheet (PDF)

FAQ

Does the SIGA-HFD have a rate-of-rise element?
No. It has a 135°F (57.2°C) fixed-temperature sensor only. The SIGA-HRD adds a 15°F per minute rate-of-rise function.

Is a base included?
No. Compatible bases are ordered separately: SIGA-SB, SIGA-SB4, SIGA-RB, SIGA-RB4, SIGA-IB, SIGA-IB4 and the SIGA-AB4G, SIGA-AB4GT and SIGA-AB4G-LF sounder bases.

Which control panels is it compatible with?
Signature Series heat detectors are compatible only with the Signature Loop Controller, which supplies 15.20 to 19.95 VDC.

Can it be used as the only fire detection?
Edwards notes that a heat detector alone does not provide life safety protection and should be used with ionization or photoelectric smoke detectors.