1: OVERVIEW
The Bacharach MVR-300 detects refrigerant leaks in occupied
spaces.
3: SAFETY INSTRUCTIONS
CODE COMPLIANCE:
Comply with all local and national
laws, rules 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.
CAUTION:
The use of MVR-300 in ceiling voids
in a hotel room would not strictly comply with
EN378.
IMPORTANT:
Mount in-room sensors at less
than the normal heights of the occupants. E.g.,
in a hotel room this is less than bed 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: 6203-9001
Revision 1
August 2016
INSTALLATION GUIDE
Magnetic
Wand
Grill
Decorative
Bezel
Tri-color
Status LED
Magnetic
Switch B (
••)
MVR-300 Proper vs. Improper Placement Locations
AIR C
ONDITIONER
6: INSTALLATION
REFRIGERANT
GAS DETECTOR
Magnetic
Switch A (
•)
For more detailed information, scan
here or visit www.MyBacharach.com to
access the MVR-300 User Manual (P/N
6203-9000).
Coin Slot
for Bezel
Release
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 nor disturb any of these
components.
2: MOUNTING CONSIDERATIONS
Mount the MVR-300 according to the above considerations,
product dimensions, and maximum wiring lengths.
4: SPECIFICATIONS
Size (HxWxD):
150 x 105 x 45 mm including bezel
(6.0” x 4.1” x 1.75”)
Depth of bezel: 10 mm (0.39 “)
Weight:
230 grams (8 ounces)
Indicators:
Multi-color status LED
Internal alarm buzzer; 85 dB @ 30 cm (12’)
Alarm Delay:
Selectable (0, 5, 10, 15 minutes)
Inputs:
Magnetic switches (2)
Power terminal block
Configuration DIP switch block
Gas sensor (refrigerant)
Outputs:
Relay outputs (2)
2 SPDT, 1 A at 30 VDC,
1 A at 125 and 240 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 230 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 pair shielded cable
18 to 24 AWG (0.2 to 1 mm
2
) with 120 Ω
characteristic impedance
Enclosure:
Material: ABS; Protection: IP41, NEMA 1
Temperature:
Operation:
32 to 120�
F (0 to 50
�C)
Storage:
- 5 to 100�
F (- 20 to 40
�C)
Humidity:
5 to 90 %RH, non-condensing
Pressure:
23.6 to 32.5 in. of Hg (800 to 1100 hPa)
Elevation:
0 to 6,560 ft. (2000 m) altitude
Gas Detection:
R-22, R-32, R-134a, R-404a, R-407c, R-410a
Detect Range:
0 to 2,500, 5,000, 10,000 ppm
Sensor Life:
5 to 8 years (typical)
NOTE:
The MVR-300 is designed for use in 2-gang
wall boxes with a minimum depth of 50 mm (2”).
Low
Gas
Alarm
High Gas
Alarm
or Fault
The 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 electrical back boxes (not
included).
5: CONFIGURATION
1 Restart
On = Restart MVR-300
Off = Normal Operation
(Default)
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 Relay Selection
On = Failsafe Relay Operation
Off = Normal Relay Operation
(Default)
8 = Reserved
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).
Po
w
er
Rela
y #2
NC
NO
COM
Rela
y #1
NC
NO
COM
Modbus
A
G
B
5 Relay 2 Fault Indication
On = High Alarm Only
Off = High Alarm or Fault
(Default)
6 Alarm Latching
On = Alarms latch and
require manual reset
Off = Alarms automatically
reset (Default)
7 Buzzer Disable
On = Buzzer disabled
Off = Buzzer enabled
(Default)
NOTE:
Before installing the MVR-300, refer to the
calibration gas concentration label and record the
value for use in step 15 of the calibration procedure.
MVR-300 is a trademark of Bacharach, Inc. All rights reserved.
