1: OVERVIEW
The Bacharach MVR-300 UK version detects refrigerant leaks in
occupied spaces.
4: SAFETY INSTRUCTIONS
CODE COMPLIANCE:
Comply with all local and national
laws, rules, wiring codes, and regulations associated with
this equipment.
TECHNICIAN USE ONLY:
This unit must be installed by a
suitably qualified technician who will install this unit in
accordance with these instructions and the standards in his
particular industry/country. Operators of the unit should be
aware of the regulations and standards in their indus
-
try/country for the operation of this unit. These notes are
only intended as a guide and the manufacturer bears no
responsibility for the installation or operation of this unit.
Failure to install and operate the unit in accordance with
these instructions and with industry guidelines may cause
serious injury including death and the manufacturer will not
be held responsible in this regard.
SAFE MOUNTING:
This detector must be connected by a
marked, suitably located and easily reached switch or
circuit-breaker as means of disconnection.
CAUTION:
DO NOT MOUNT the MVR-300 in an
area that may contain flammable liquids or
vapors. Operation of electrical equipment in
such an area constitutes a safety hazard.
World Headquarters
621 Hunt Valley Circle
New Kensington, PA 15068 USA
Phone: 724-334-5000 • Fax: 724-334-5001
Toll Free: 1-800-736-4666
114A Georges Street Lower
Dun Laoghaire • Co Dublin • Ireland
Phone: +353 1 284 6388
Fax: +353 1 284 6389
CAUTION:
Mounting in ceiling voids in a hotel
room would not strictly comply with EN378.
IMPORTANT:
Mount at a height between 100
and 150 mm (4 and 6 inches) off the floor.
Avoid drafts and heat sources (like radiators),
and avoid sources of steam.
P/N: 6203-9002 Revision 2
August 2018
INSTALLATION GUIDE
MVR-300 Proper vs. Improper Placement Locations
6: INSTALLATION
REFRIGERANT
GAS DETECTOR
Website: www.mybacharach.com ● E-mail: help@mybacharach.com
CAUTION:
Ensure all wiring
connections are made
before
applying power.
ENVIRONMENTAL CONSIDERATIONS:
Carefully
consider the full range of environmental conditions
to which the instruments will be exposed.
TARGET GAS CONSIDERATIONS:
The physical data of
the gas or vapor to be detected must be observed.
APPLICATION CONSIDERATIONS:
The specifics of the
application (for example, possible leaks, air move
-
ment/draft, etc.) must be observed.
ACCESSIBILITY CONSIDERATIONS:
The degree of
accessibility required for maintenance purposes
must be granted.
ELECTRONIC CONSIDERATIONS:
The system contains
sensitive electronic components that can be easily
damaged. Do not touch or disturb any of these
components.
2: MOUNTING CONSIDERATIONS
Mount the MVR-300 according to the above considerations,
product dimensions, and maximum wiring lengths.
3: INSTALLATION SPECIFICATIONS
Outputs:
Relay outputs (2)
2 SPDT, 1 A at 30 VDC,
1 A at 125 and 250 VAC, resistive load
Modbus:
Connection: RS-485 terminal block
Baud rate: 9600 or 19200 (selectable)
Default baud: 9600
Start bits: 1;
Data bits: 8
Parity: None (default), odd, even (selectable)
Stop bits: 1 (default) or 2 (selectable)
Retry time: 500 ms (min) between retries
End of msg: Silent 3.5 characters
Power:
100 to 240 VAC, 50/60 Hz, 4 W
Wiring Power:
3-core cable, 14 to 20 AWG (0.5 to 2.0 mm
2
)
Wiring Relays:
3-core cable, 18 to 20 AWG (0.5 to 1.0 mm
2
)
Wiring Modbus:
2-core twisted, shielded pair 18 to 24 AWG
(0.2 to 1 mm
2
) with 120 Ω characteristic
impedance; Use Belden 8761 or similar;
Maximum diameter of cable + heat shrink
must
be
≤5 mm (0.2 in)
NOTE:
The MVR-300 UK is designed for use in
2-gang and 3-gang UK back boxes with a minimum
depth of 47 mm (1.9”).
The refrigerant detector can be calibrated and maintained
non-intrusively using a magnetic wand.
The detector is for indoor applications. It is housed in an ABS
enclosure that fits into most 2-gang UK electrical back boxes
(not included). Thinner
metal
mounting tabs are provided for
flush mounting in UK back boxes with higher mounting tabs.
Copyright ©
2018 Bacharach, Inc. All Rights Reserved
5: CONFIGURATION
When inserting the wire into the terminal,
release the spring clamp by pushing back
the release latch.
Push to release
1 2 3 4
ON
5 6 7 8
Gas alarms and status messages are indicated visually by a
3-colored LED and audibly by a buzzer. In case of an alarm
and/or fault, relays switch (for example, shut-off valves or alarm
devices).
NOTE:
Before installing the MVR-300, refer to the
calibration gas concentration label and record the
value for use in step 16 of the calibration procedure.
NOTE:
The manufacturer of this product requires that
a bump test or calibration be performed following
installation to verify instrument functionality.
CAUTION:
RS-485 signal cable must be
insulated to the highest voltage level in the
system. Protect the RS-485 signal cable by using
the supplied installation kit.
1. Prepare signal cable and put boot over the signal cable.
2. Add appropriately sized ferules (not included) if required.
3. Apply 10 cm piece of shrink wrap as close to the wire ends/
ferules as possible while leaving some free wire to allow
connection to the detector.
4. Heat the shrink wrap.
5. Connect signal wires/ferules to the detector.
6. Slide rubber boot along the wire and shrink wrap assembly
and connect it to the detector.
Po
w
er
Modbus
(See St
ep
s 1-6)
1 Restart
Off
Normal operation (Default)
On
Restart MVR-300
2,3 Alarm ON Delay
Off, Off No delay (Default)
Off, On 5 minute delay
On, Off 10 minute delay
On, On 15 minute delay
4
Failsafe
Off
Normal relay operation (Default)
On
Failsafe relay operation
5
Relay 2 Fault Indication
Off
High alarm or fault (Default)
On
High alarm only
6
Alarm Latching
Off
Alarms automatically reset (Default)
On
Alarms latch and require manual reset
7
Buzzer Disable
Off
Buzzer enabled (Default)
On
Buzzer disabled
8
Enable Reset to Factory Defaults
Off
Normal operation (Default)
On
Reset enabled (see manual for details)
For more detailed information, scan here or
visit www.mybacharach.com to access the
MVR-300 User Manual (P/N 6203-9000).
Magnetic Wand
3-color status LED
Magnetic switch 1 (
•
)
Magnetic switch 2 (
••
)
Sensor Module
Plastic Mounting Tabs
Example of a customized
faceplate (not included)
Sample UK back box
(not included)
MVR-300 is a trademark of Bacharach, Inc. All rights reserved.
