Secutron MRI-4020 Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
MRI-4020 MULTI-SENSOR DETECTOR
MRI-4020-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-4020 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-4020 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.
Note: MRI-4020-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 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
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
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 shown 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-6137SEC rev 0 2/3/23