FAQs - System Sensor

Dealer - Frequently Asked Questions
i4 Series Combination
CO/Smoke Detector
What is the i4 Series combination CO/smoke detector?
What else does the module do?
The System Sensor i4 Series includes both a 12/24 volt, systemconnected, combination electrochemical carbon monoxide (CO)/
photoelectric smoke detector and a module that interfaces with a
panel. Below are the model numbers:
The module allows interconnectivity of all devices on the loop,
remote maintenance signaling, and EZ Walk loop testing capabilities
(2-wire devices only). The RSS-MOD is not needed for sounder
interconnection.
Part No.
Description
COSMO-2W
2-wire, 12/24 volt, system-connected,
combination CO/smoke detector with RealTest®
technology
COSMO-4W
4-wire, 12/24 volt, system-connected,
combination CO/smoke detector with RealTest
technology
COSMOD2W
2-wire interface module (required with COSMO2W models)
COSMOD4W
4-wire interface module (required with COSMO4W models)
How much money will I make/save using the i4 Series
versus two separate devices?
What is the module compatible with?
The module works with all i4 Series and compatible i3 Series smoke
detector models (2WTA-B, 4WTA-B), allowing full interconnectivity and
backwards compatibility for retrofit applications.
With which panels is the system compatible?
Panel compatibility is not an issue because the module is a 4-wire
device. The module can use a 2-wire smoke zone on a panel the
same way a 4-wire detector can use that zone. Each module can
support 12 detectors and looks like a single 4-wire device to the
panel; the module is not powered by the 2-wire smoke zone.
How many wires does the detector use?
The i4 Series can save you money in both labor and materials – how
much depends on how many detectors you install and your current
cost of materials. You can determine your profit increase or cost
savings by entering your information in our Value Calculator.
The COSMO-2W is a 2-wire device with 2 wires in and 2 wires out. The
COSMO-4W is a 4-wire device with 4 wires in and 4 wires out.
In addition, some homeowners have objected in the past to
purchasing CO detection and monitoring due to the increased cost
of the system and the aesthetics of having multiple devices on the
wall or ceiling. The i4 Series overcomes these objections because it
only requires only one device on the wall or ceiling for both fire and
CO protection and reduces the overall installed cost over a separate
device system.
The module uses 6 to 10 wires to connect to the panel: two wires for
power, two wires for the smoke zone, two wires for the CO zone, and
an optional two wires for the maintenance zone on 2-wire devices
only. The trigger inputs are optional and are useful for interconnection
across multiple modules.
Is the module necessary?
Refer to the appropriate i4 Series installation manual or the wiring
cheat sheet.
Yes, the module is the interface between the detector and the panel.
It allows a 2-wire or 4-wire device to communicate distinct smoke,
maintenance and CO signals to the panel while reducing wiring
requirements as compared to separate smoke and CO devices.
How many detectors can the module handle?
The module can handle up to 12 detectors on a loop in any
combination of i4 series and compatible i3 series smoke detectors
with sounders.
Can heat detectors be added to the loop and do they
count against the 12?
Heat detectors can only be used on the 4-wire i4 system and do not
count against the 12 detectors per module.
How many zones does the system use?
A 2-wire module uses two to three zones; a smoke zone, a CO zone,
and an optional maintenance zone. A 4-wire module uses two zones.
(continued)
How many wires does the module have?
How do I wire the detector or the module?
Where does the module get its power?
The module is like a 4-wire smoke detector; it gets its power from the
panel’s Smoke power or Auxiliary power output.
Does the power need to be resettable?
Yes, the power to the module needs to be resettable to reset the
detectors. During a reset, the detector will preserve its CO alarm state
over a smoke alarm reset.
Will the 3.9k end-of-line resistor be supplied?
Yes, it is included with the module.
What is the CO trigger and what does it do?
Is the RSS-MOD needed to interconnect sounders?
The CO trigger is optional; it is useful for interconnection of multiple
modules. All panels can be programmed with auxiliary relays
that activate upon an alarm condition. These provide a positive
voltage output that can be connected to the module’s CO trigger.
The CO trigger input allows a single module to have CO silence/
hush capability and allows multiple module installations to have all
sounders activated in Temporal 4 in the event of a CO alarm.
No, the i4 module will activate the sounders of all detectors on the
loop.
When using multiple modules will the sounders synch
across modules?
The sounders will not be synchronized across modules. If a bell output
from the panel is available, it can be used to sound the modules
smoke trigger in unison.
Why are the trigger inputs one wire and not two?
They are voltage referenced to the Aux In minus of the module.
Can modules be daisy-chained together to save zones
on the panel?
No, each module must use its own fire and CO zones.
Where should the module be installed?
The module can be mounted up to 20 feet away from the panel, to
a 411/16-inch back box or in its’ own metal enclosure. For UL864
applications, the wiring should be enclosed within conduit or
equivalently protected against mechanical injury.
How is the module mounted?
The module can be mounted to a 411/16˝ square back box or inside an
enclosure. If mounted inside an enclosure, the module does not need
its plastic cover.
What is the current draw of the detectors and modules?
For the 2-Wire system, the standby current is 45mA (12 volts in) fully
loaded; 27mA (24 volts in) fully loaded. For the 4-Wire system, the
standby current is 36mA (12 volts in) plus 200uA per each i4 detector
connected.
What is the life of the CO cell?
Fire alarm-only panels (UL864 panels) do not allow CO
trigger, so how would you sync a CO alarm?
The life of the CO cell is 6 years. It has a built in clock timer which
determines when 6 years has passed.
CO trigger cannot be used with UL864 panels. Connection is not
necessary to cause the detectors to sound. The use of the trigger is to
have multiple modules sound and to allow the keypad to be used to
silence/hush a CO alarm.
Yes, the replacement part number is CO-REPL, and the part will be
available starting in 2017.
If I have an installation with multiple zones, how many
modules are needed and can I still activate all device
sounders?
What type of canned CO should I use for the functional
CO test?
If multiple zones are required, then a module will be needed for each
zone. Maintenance zones can be combined at the panel and the
panel can be wired to the trigger inputs on the module to activate the
sounders of all devices on the loop.
Is the CO cell field replaceable?
SDI Solo C6 canned CO is cross-listed for use with the detector. It is
available at most local security distributors.
What agency listings does the detector have?
It is UL 268, UL 2075 and CSFM listed.
What is the proper placement for the detector?
The detector can be mounted on the ceiling or on a wall. On the
ceiling, the detector should be at least 12 inches from any wall. On
the wall, the detector should be 4 inches down from the ceiling. Do
not install outdoors or in any environment that does not comply
with the detector’s environmental specifications. See the i4 Series
installation manual or consult the applicable NFPA guidelines for
further instructions.
Where can I get more training?
There is a training module available at our i4 landing page,
systemsensor.com/i4. There are also archived webinars available for
viewing at systemsensor.com/webinars.
What is the price?
For pricing information, please contact your local security distributor.
Can the detector be mounted on the ceiling?
Yes, it can be mounted on the ceiling at least 12 inches away from the
wall (please refer to the i4 Series installation manual and NFPA 720:
2009 Section 9.4.1.2 for more information).
Where can I purchase the i4 Series?
i4 can be purchased at your local security distributor.
Where can I get more information?
How is the detector mounted?
The detector can be ceiling- or wall-mounted to a wide variety of
electrical boxes (3.5˝ and 4˝ Octagonal; Single-gang; 2 x 4˝, 3.5˝
and 4˝ round ceiling) or directly mounted to the ceiling or wall using
drywall fasteners.
Visit the i4 Series landing page at systemsensor.com/i4.
systemsensor.com/i4
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