POTTER PSHA Combination Photoelectric Smoke Heat Sensor Owner’s Manual
- June 9, 2024
- POTTER
Table of Contents
POTTER PSHA Combination Photoelectric Smoke Heat Sensor
Product includes a 5 year warranty
Features
- Photoelectric smoke and fixed temperature heat sensor
- Wide sensitivity range of 1.05 to 3.82%/foot
- 135° Fahrenheit restorable heat detector
- Sensor communicates sensitivity to control panel
- UL listed smoke calibration and sensitivity
- Optional locking tab to prevent unwanted removal
- Simple and accurate address setting without mechanical switches
- LED for 360° viewing
Description
The combination Photoelectric Smoke/Heat Sensor is a listed Analog/Addressable
smoke sensor and fixed temperature heat sensor compatible with any fire alarm
control panel that has the Potter/Nohmi protocol. The PSHA is a low profile
combination smoke/heat sensor with a wide sensitivity range. 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 PSHA has a sensitivity range of 1.05 to 3.82% per foot and is UL and cUL
listed. The PSHA is also a 135° Fahrenheit restorable heat sensor. The PSHA
can be configured for drift compensation and has built in dirty detector
warning as well as. The PSHA and the control panel communicate over a proven
and robust digital communication path and the system analyzes the level of
alarm at the particular device. The total polling speed is less than five (5)
seconds, well under the UL requirements. The PSHA is listed to both UL 268
Smoke Detection Standard and UL 521 Heat Detection Standard.
The PSHA has a single LED that allows for 360° viewing. The sensor is
compatible with any of the Potter/Nohmi bases and simply twists on. The PSHA
is addressed using the hand held programmer or the control panel addressing
function.
Air Velocity Ratings
The PSHA has an Open Area of Protection air velocity rating of 0 to 300 feet
per minute.
The system has a maximum of 13 LEDs that can be turned on simultaneously. If the system already has 13 LEDs on, the PSHA 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 panel.
Before connecting a device to the SLC loop, take the following precautions to
prevent potential damage to SLC or device.
Verify the following:
- Power to the device is removed
- Field wiring is correctly installed.
- Field wiring has no open or short circuits.
Document discrepancies and notify appropriate personnel.
Specifications
| Item | PSHA |
|---|---|
| Working voltage range | 22.0 to 24.0 V |
| Standby current | 325 µA |
| Alarm indicator | 1 LED |
| Alarm indicator current | 1.2 mA D.C. |
| Alarm set-point range | 1.05 to 3.82 %/ft / 3.4 to 12.0 %/m |
| Installation temperature range | 32 to 115 ° F / 0 to 46 ° C |
| Heat Alarm Point | 135 ° F |
| 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) | 85g (2.99 oz) |
| Dimensions (without base) | Height: 1.69 in (43 mm) |
Diameter: 4.0 inches (99 mm)
Approvals / Listings| UL, cUL, CSFM
Operation
The PSHA is an analog/addressable combination sensor that uses one address on
the Signaling Line Circuit (SLC) of a compatible fire alarm control panel. The
unit communicates with the control panel as it is polled. The LED flashes
every time the unit is polled and they will latch steady if the unit is in an
active status.
The PSHA is a proven design being in service throughout the world. The PSHA
with the AB-4 or AB-6 base has a low profile of about two (2) inches to blend
into the surrounding environment. The sensor includes an insect screen to
prevent foreign objects from reaching the chamber and the entire unit can be
cleaned with a simple vacuum. The thermistor provides reliable heat detection
at a fixed temperature. The unit is reusable
Sensor Sensitivity
The PSHA and the compatible control panel work in tandem to keep the
sensitivity consistent. As the sensor is installed over time, the sensor
compensates for the dirt in the unit until it is out of range. At that time,
the panel will indicate a dirty sensor. The sensor will then have to be
cleaned or replaced.
Anytime the PSHA is being polled, the sensitivity may be viewed or printed
from the control panel.
Note: As required by NFPA, do not install the sensors until all
construction is complete and the work area has been thoroughly cleaned. If the
sensors have been installed in a construction environment, they should be
cleaned or replaced before the system is placed into service.
Spacing
The PSHA is UL/ULC listed with a recommended maximum spacing of 30 feet. Refer
to NFPA 72 for specific information regarding detector spacing, placement and
special applications.
Compatible Bases
All bases will mount on a single gang, double gang, octagon, 4” square or mud
ring electrical box.
| Device | Description |
|---|---|
| AB-4 | 4” Standard Base |
| AB-6 | 6” Standard Base |
| AIB | 6” base with an isolator module included. The base is pre-wired with a |
pluggable jumper to the module.
ARB| 6” base with a dual relay module included. One relay is rated for 8 amps
at 240 VAC/30 VDC and the second is rated for 2 amps at 240 VAC/30 VDC. The
base is pre-wired with a pluggable jumper to the module.
ASB| 6″ base with sounder module included. Sound pattern is provided from
external source. The base is pre-wired with a pluggable jumper into the
module.
Potter Electric Signal Co., LLC •
St. Louis, MO •
Cust Service: 866-240-1870 •
Tech Support: 866-956-1211 •
Canada 888-882-1833 •
www.pottersignal.com
PRINTED IN USA
MKT. #8880119 – REV B 2/10
PAGE 1 OF 1
References
- Fire Alarm Resources | Download fire alarm documents
- Potter Electric: Fire Alarms & Fire Sprinkler Systems