Secutron MRI-4021 Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
MRI-4021 MULTI-SENSOR DETECTOR
MRI-4021-ISO MULTI-SENSOR DETECTOR
ABOUT THIS MANUAL
This manual is included as a quick reference for installation. For
further information on the use of this device with a FACP, please refer
to the panel's manual. For more information regarding maintenance,
testing, spacing, and locating detectors, please refer to the LT-
9420SEC MRI-4000 series detector technical bulletin.
Note: This manual should be left with the owner/operator of this
equipment
DETECTOR DESCRIPTION
The MRI-4021 smoke detector continuously checks air obscuration
and reports it to the Fire-Alarm panel using a fully digital
communication protocol. It can also measure ambient temperature
and can be set to report an alarm when sampled temperature
exceeds 135°F (57°C). Excessive temperature rises can also be
reported if the detector is configured for rate-of-rise operation. The
MRI-4021 must be used with a MRI-4000 series compatible control
panel. Operational mode and levels are selected at the Fire alarm
panel through the panel configuration tool. It also has a remote
output that can be controlled by the panel. Please see specifications
for compatible devices that can use the remote output feature. These
devices are listed to UL 268 7th Edition.
Note: MRI-4021-ISO is equipped with a bi-directional short-circuit
isolator to help protect against wiring faults that may otherwise result
in a loop failure.
Note: Detectors with built-in isolators (ending with -ISO) will add
some resistance to the SLC loop: The total allowable loop resistance
of 40 Ohms must be reduced by 0.22 Ohms for each device with a
built-in isolator.
Before installing this device please thoroughly read this manual and
refer to the applicable codes for guidance on location, spacing and
acceptable use. Also seek guidance from the compatible control
panel instructions for the device operation modes and the
configuration requirements.
Note: If the detector is used with the remote indicator, then the
voltage value of the detector must be at least 18V as the indicators
do not operate below 18V.
FIGURE 1: DETECTOR FRONT
SPECIFICATIONS
Standard
Normal Operating Voltage:
Maximum Alarm Current (LED on): 3.2mA (LED on)
Standby Current:
Temperature Range (no alarm):
Humidity:
Dimensions:
Mounting:
Accessories:
Wiring range on all terminals:
1
UL 268 7th Edition,
UL 521, CAN/ULC-S529
and CAN/ULC-S530
15 to 30VDC
160μA (LED flashing)
32°F to 100°F (0°C to 37.8°C)
10% to 93% Non-condensing
4 1/4" Diameter, 1 3/4" Height
4" square by 2 1/8" deep box
MIX-4090 Programmer
MRI-4001/4002 Detector Base
RA100Z Remote LED
22 to 12 AWG
25 Interchange way, Vaughan Ontario. L4K 5W3
INSTALLATION
This detector must be installed on a ceiling or wall using a compatible
base. SLC line and remote output connections for the most common
base MRI-4001 are show in figure 2. A twisted pair cable should be
used for the SLC line. If a shielded cabled is used, connect the
shields to the proper terminal on the base. Do not connect shields to
earth ground. If a ground continuity wire is required by the local code,
it should be a separate conductor. Please note that shielded cables
may reduce the SLC loop length that can be achieved due to their
high capacitance.
The detector address should be programmed using the MIX-4090
hand-held device before inserting the detector on the base.
Addresses 1 to 240 can be used for any device on a SLC loop. Each
device on a loop must have a unique address.
A breakaway tab inside the base can be inserted in the outer rim of
the base to visibly identify each detector with their address. See
figures 2 and 4. The detector can then be placed on the base using
the following steps:
1. Position the detector centrally on its adapter base ensuring it is
level.
2. Rotate clockwise applying gentle pressure. The detector will
drop into its keyed location.
3. Continue to rotate clockwise a few degrees until the detector
has fully engaged in the adaptor base.
4. When the detector is firmly engaged, check the alignment of the
raised reference marks on the detector and on the base
(figure 4).
IMPORTANT NOTES ON DETECTOR INSTALLATION
Disconnect loop power before installing the detector.
This detector comes with a dust cover to protect the device during
shipping and when first installed. It is not intended to provide
complete protection against contamination, therefore, detectors
should be removed from their base before construction, major re-
decoration or other dust producing work is started. Dust covers must
be removed before the system becomes operational.
Heat detectors should installed away from normal heat sources. Do
not use in locations where ambient temperature is within 20°F (10°C)
of the alarm setting. Long term ambient temperature should not
exceed 120°F (49°C).
When configured for rate of rise operation, do not use heat detectors
in locations such as an heated building entrance where large
temperatures swings can be expected.
Smoke detectors are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
When duplicate terminals are not provided to facilitate monitoring of
the installation wiring connections, and there is no provision to
prevent looping an unbroken wire around or under a terminal, the
word "CAUTION" and the following or equivalent text in letters not
less than 2.38 mm (3/32 inch) high shall be included on the
installation drawing: "FOR SYSTEM MONITORING - FOR
TERMINALS "Loop out (+)" AND "Remote Device (+)", DO NOT USE
LOOPED WIRE UNDER TERMINALS. BREAK WIRE RUN TO
PROVIDE MONITORING OF CONNECTIONS.
Phone: 905.660.4655; Fax: 905.660.4113
Web: www.secutron.com
LT-6712SEC rev 0 3/13/24