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SM-501 – Installation
Specifications subject to change without notice. | INST APD0191 D140113 | USA 150303 | Page 6 of 7
OPERATIONAL TESTING
To determine the correct operation of the SM-501 Series duct smoke
detector, ensure input power is connected and the green pilot LED is
illuminated.
The LED on the detector head of both the ionization and photoelectric
models (55000-225 or 55000-328) will flash while the unit is in standby mode.
The LED on the detector head of both the ionization and photoelectric
models (55000-250 or 55000-350) will not flash while the unit is in the
standby mode. The LED on all the above detector heads will be permanently
illuminated when smoke is detected and the head is in alarm.
Above: The LED will be permanently illuminated when the unit is in alarm.
With the air handling unit shut down (not connected), and the clear cover
removed, press and hold the test/reset button on the SM-501. The red alarm
LED on the circuit board will be illuminated and the alarm relay outputs will
change state. Using a multimeter set to OHMS (or continuity buzzer function
on the meter) place the meter probes on the following terminals, and ensure
the contacts are closed (continuity) (8-9) and (11-12). When releasing the
test/reset button these contacts will open.
The trouble contacts 13, 14, 15 on the SM-501 detector will not change
state in the event of a fire alarm, operational, or functional testing. The
trouble contacts can be tested by rotating the smoke detector head counter-
clockwise and removing the detector head. This action will extinguish the
green pilot LED and cause the trouble contacts to change state, (13-14) will
be closed (continuity) and (14-15) will be open circuit. Replacing the detector
head and rotating it clockwise until it locks, will cause the green pilot LED to
be illuminated and the unit will be operational, terminals (13-14) will be an
open circuit and (14-15) will be closed (continuity).
FUNCTIONAL TESTING
Once operational testing is concluded the unit requires functional testing to
determine the correct operation of the detector head.
With the clear cover removed, air handling unit shut down, and using the
aerosol test smoke gas part number TG-1000, spray the test gas directly at
the detector head from a distance of 12 inches for 2 seconds.
!
CAUTION: SPRAYING FROM A DISTANCE CLOSER
THAN 12 INCHES MAY CAUSE DETECTOR CONTAMINATION.
12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.INTEC | relevantsolutions.com/inteccontrols
TESTING PROCEDURES
After 15 to 20 seconds the detector head will go into alarm, illuminating the
detector head LED and causing the duct unit functions to operate, alarm relays
will change state, and the alarm related remote accessories, if attached, will
function.
If no test gas is available to conduct functional testing, light a piece of clothesline
(rope) and blow the flame out, hold the smoldering rope 3" from the detector
head and lightly blow across the smoldering area towards the detector head,
the alarm indicator should illuminate within one minute.
Should additional testing also be required for simulated fire conditions, smoke
bombs placed in the duct may not be suited for the particular detector head
(photoelectric or ionization) selected and installed. Consult the smoke bomb
data for proper use and compatibility with detector type.
S65A ionization detector head 55000-225 and S60A ionization detector head
55000-250 utilize a radioactive source as its means of detection and will detect
smoke particles of between .1 and 1 micron in size.
S65A photoelectric detector head 55000-328 and S60A photoelectric detector
head 55000-350 operate on the principle of light scatter and will detect smoke
particles of between 1 and 10 microns in size. When purchasing smoke bombs
for additional required functional testing, ensure smoke particle sizes comply
with the criteria as described above.
MAINTENANCE
Each installation location must be assessed on its own merits. If the protected
area is of a very dirty nature then the SM-501 Duct unit(s) will have to be
checked and cleaned on a quarterly basis or when cleaning is required.
As a guideline the smoke detector head should be cleaned every six
months or as required. The best methods of cleaning are to vaccum the
detector head thoroughly or to blow the detector head out using clean, dry
compressed air.
Do not use chemicals or non-conforming air to clean the detector head
housing as this could contaminate the detector head and damage the casing.
Sensing tubes must be inspected and cleaned in accordance with the
schedule as determined above, to allow the free flow of air through both
inlet and exhaust tubes.
Consult your local code and AHJ requirements for required maintenance
schedules.
Above: For factory recommended functional testing, spray the proper test
gas directly at the detector head from a distance of 12 inches for 2 seconds.
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