Owner's Manual

MKT. #8830018 - REV C
06/13
PRINTED IN USA PAGE 1 OF 2
RHA
RATE OF RISE/FIXED TEMPERATURE
HEAT DETECTOR
Potter Electric Signal Company, LLC • St. Louis, MO • Cust Service: 866-240-1870 • Tech Support: 866-956-1211 • Canada: 888-882-1833 • www.pottersignal.com
Description
The combination Rate of Rise/Fixed Temperature Heat Sensor (RHA)
is a listed Analog/Addressable combination temperature heat sensor
compatible with any re alarm control panel that has the Potter/
Nohmi protocol. The heat sensing portion utilizes a proven thermistor
for accurate and reliable heat detection. The sensor and base (not
included) are made of a durable plastic in an eggshell white (off white)
to blend in with the ceiling.
The RHA is UL and cUL listed with a selectable xed temperature
point from 135° to 174° and a rate of rise feature. The rate-of-rise
operates when the temperature increases 12-15°F occurs. The heat
sensor is ideal for installations needing the earlier heat detection.
The RHA has two LEDs that allow for 360° viewing. The sensor is
compatible with any of the Potter/Nohmi bases and simply twists on.
The RHA is addressed using the hand held programmer or the control
panel addressing function.
Spacing
The RHA spacing is dependent on the alarm set-point. The unit is
listed from 135°F to 174°F. However as the temperature setting
increases, the spacing decreases.
Alarm set-point RHA Spacing
135 to 170 °F (57 to 76 °C) Max. 50 ft
171 to 174 °F (77 to 79 °C) Max. 15 ft
The system has a maximum of 13 LEDs that can be turned on simulta-
neously. If the system already has 13 LEDs on, the RHA will operate
even though the LED will not illuminate.
Setting the Address
Each addressable module, smoke sensor, heat detector and
combination sensor/detector must have the address set before
connecting the device to the SLC loop. The address is set using the
hand held device programmer or the addressing feature on the control
Features
• Adjustable xed 135° to 174° Fahrenheit
• Rate of rise feature with 10-12°F per minute detection
• LEDs for 360° viewing
• Low prole
• Reliable detection technology
Item FHA
Working voltage range 22.0 to 24.0 V
Standby current 325 µA
Alarm indicator 2 LEDs
Alarm indicator current 1.2 mA D.C.
Alarm set-point range 135 to 174 °F/ 57 to 79 °C
Rate-of-rise 12 to 15°F
Installation temperature range 32 to 100 °F / 0 to 38 °C
Operating relative humidity
range
0% to 93% (Non-condensing)
Start-up time Max. 1 sec.
Maximum number of
addresses per loop
127
Maximum number of lighted
indicators in alarm per zone.
13
Color Eggshell White
Weight (without base) 73g (2.57oz)
Dimensions (without base) Height: 1.50 in (38mm)
Diameter: 4.0 inches (99mm)
Approvals / Listings UL, ULC, CSFM, MEA
panel.
Before connecting a device to the SLC loop, take the following
precautions to prevent potential damage to SLC or device. Verify the
following:
1. Power to the device is removed
2. Field wiring is correctly installed.
3. Field wiring has no open or short circuits.
Document discrepancies and notify appropriate personnel.
Specications
Product includes a 5 year warranty
S24776 7270-0328:0193
firealarmresources.com