Installation and Maintenance Instructions for
H355, H355R, and H355HT Intelligent Plug-In Temperature Sensors
This sensor must be installed in compliance with the control panel system installation manual. The installation must
meet the requirements of the Authority Having Jurisdiction (AHJ). Sensors offer maximum performance when installed
in compliance with the National Fire Protection Association (NFPA); see NFPA 72.
Before installing sensors, please read the system wiring and installation manual thoroughly. This manual provides
detailed information on sensor spacing, placement, zoning, and special applications. Copies of these manuals are
available from Fire•Lite.
GENERAL DESCRIPTION
Models H355, H355R, and H355HT are intelligent sensors that utilize a state-of-the-art thermistor sensing circuit for fast
response. These sensors are designed to provide open area protection with 50 foot spacing capability. Model H355 is a
fixed temperature sensor with 135° F fixed temperature alarm. Model H355R is a rate-of-rise temperature sensor with
135° F fixed temperature alarm. Model H355HT is a high temperature sensor with 190° F fixed temperature alarm.
Two LEDs on each sensor light to provide a local, visible sensor indication. Remote LED annunciator capability is avail-
able as an optional accessory (Part No. RA400Z).
Models H355, H355R, and H355HT require compatible addressable communications to function properly.
Connect these sensors to listed-compatible control panels only.
SPECIFICATIONS
Diameter:
6.1 inches (155 mm) installed in B350LP
Height:
2.1 inches (51 mm)
Weight:
4.8 ounces (137 gm)
Installation Temperature:
–4°F to 100°F (–20°C to 38°C); H355 and H355R
–4°F to 150°F (–20°C to 66°C); H355HT
Operating Humidity Range:
10% to 93% Relative Humidity Noncondensing
Mounting:
B350LP flanged base
Voltage Range:
15 to 32 Volts DC Peak
Standby Current:
300
µ
A @ 24 VDC (one communication every 5 sec.with LED blink enabled)
LED Current:
6.5 mA @ 24 VDC
Fixed Temperature Rating:
135°F (57°C); H355 and H355R
190°F (88°C); H355HT
Rate of Rise Detection:
Responds to greater than 15°F/min.; H355R
F300-25-00
1
I56-1972-00R
Fire•Lite, One Fire•Lite Place, Northford, CT 06472
