Bacharach Parasense GRM2 CO2 Series Manual

GRM2 CO2
REFRIGERANT MONITOR
OPERATION & MAINTENANCE MANUAL
Models
GRM2-104D2-1xxCO2
Doc. Ref. MNGRM2CO2 REV. 3

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Operation & Maintenance Manual
Doc Ref. MNGRM2CO2 REV. 3
GRM2 CO2
Refrigerant Monitor
Models
GRM2-104D2-1xxCO2
Copyright Notice
Copyright © Parasense. All rights reserved.
Must not be copied or reproduced without the written permission of Parasense.
Disclaimer
The information contained within this document is subject to change without notice.
While Parasense continue to make the information within this document as accurate as possible, it
may contain unintentional typographical or technical errors. Any errors found are changed and
incorporated into a revised edition of this document.
Parasense assumes no responsibility for its use, or for any infringements on the rights of third parties
that may result from its use.
Contact
Parasense Limited
Phone: [phone]
Email: [e-mail]
Web: www.parasense.com
Parasense, Inc
Phone: [phone]
Email: [e-mail]
Web: www.parasense.com
‘Caution, Risk of Electric Shock’ Please isolate elsewhere before opening
Monitor door.
Please read this manual before installing or servicing the equipment.

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TABLE OF CONTENTS
1 INTRODUCTION...............................................................................................................................1-1
GENERAL ARRANGEMENT............................................................................................................1-2
2 INSTALLATION GUIDE ...................................................................................................................2-1
ENCLOSURE DIMENSIONS............................................................................................................2-1
MONITOR FITTING INSTRUCTIONS..............................................................................................2-1
ELECTRICAL REQUIREMENTS .....................................................................................................2-2
MAINS INPUT CONNECTIONS.......................................................................................................2-3
SINGLE GROUND EARTH SCREW CONNECTION.......................................................................2-3
RELAY CONNECTIONS ..................................................................................................................2-4
EXTERNAL COMMS........................................................................................................................2-5
FREEWAY INSTALLATION GUIDELINES.......................................................................................2-5
INSTALLATION –DO’S....................................................................................................................2-6
INSTALLATION –DON’T’S ..............................................................................................................2-6
NETWORK MODULE CONNECTIONS ...........................................................................................2-7
BEACON INSTALLATION................................................................................................................2-8
OPTIONAL RS485 NETWORKED GAS SENSORS ........................................................................2-9
OPTIONAL ATM2R SINGLE/MULTIPLE BEACON INSTALLATION.............................................2-10
OPTIONAL NETWORKED GAS SENSORS..................................................................................2-11
OPTIONAL ANALOGUE SENSOR TRIP MODULE.......................................................................2-12
3 ADC-104 TERMINAL PANEL (OPTIONAL) ....................................................................................3-1
ADC-104 DIMENSIONS ...................................................................................................................3-1
ADC-104 MAINS POWER INPUT CONNECTIONS.........................................................................3-2
GRM2 CO2 WITH ADC-104 INSTALLATION OVERVIEW ..............................................................3-2
4 SETTING A WINDOWS PC TO COMMUNICATE WITH A GRM2 CO2 .........................................3-1
5 MONITOR SETUP............................................................................................................................5-1
HOME SCREEN...............................................................................................................................5-2
SAMMS LIST....................................................................................................................................5-3
LOGS MENU ....................................................................................................................................5-4
ALARMS LOG ..................................................................................................................................5-4
FAULTS LOG ...................................................................................................................................5-5
EVENTS LOG...................................................................................................................................5-6
SYSTEM TEST.................................................................................................................................5-7
MANAGEMENT FUNCTIONS..........................................................................................................5-8
NETWORK SETTINGS ....................................................................................................................5-8
NETWORK DEFAULTS....................................................................................................................5-9
REBOOT GRM2C.............................................................................................................................5-9
CHANGE PASSCODE ...................................................................................................................5-10
6 USER GUIDE....................................................................................................................................6-1
KEYPAD FUNCTIONS.....................................................................................................................6-1
TRAFFIC LIGHT DISPLAY...............................................................................................................6-2
ALARM OR FAULT ON THE SYSTEM.............................................................................................6-2

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DEFAULT CONFIGURATION SETTINGS.......................................................................................6-2
7 SERVICE AND MAINTENANCE......................................................................................................7-1
SYSTEM FAULT DIAGNOSIS..........................................................................................................7-2
FAULT MESSAGES.........................................................................................................................7-3
REPLACING THE ENCLOSURE DOOR..........................................................................................7-5
REPLACING THE NETWORK MODULE (INC. INSERT PLATE) ....................................................7-7
REPLACING ASAMM BLOCK.........................................................................................................7-8
REPLACING THE STYX MODULE ..................................................................................................7-9
REPLACING THE POWER SUPPLY MODULE...............................................................................7-9
REPLACING THE DUAL PILOT RELAY MODULE........................................................................7-11
SYSTEM TEST –INTERNAL SAMMS ...........................................................................................7-12
AIR FLOW –INTERNAL SAMMS...................................................................................................7-13
FIELD CALIBRATION (CO2 DYNAMENT SENSOR).....................................................................7-14
FIELD CALIBRATION (CO2 CLAIRAIR SENSOR) ........................................................................7-19
SYSTEM TEST -RS485 NETWORKED SAMMS...........................................................................7-24
SYSTEM TEST –RS485 AMMONIA NETWORKED SAMMS........................................................7-26
SYSTEM TEST –BACHARACH MGS.150 SENSORS..................................................................7-28
ZERO CALIBRATION OF SMARTGAS RS485 NETWORK SAMMS.............................................7-31
FIELD CALIBRATION OF GDS RS485 NETWORK SAMMS.........................................................7-33
CALIBRATION OF BACHARACH MGS.150 NETWORK SENSOR...............................................7-34
8 SPECIFICATION ..............................................................................................................................8-1
9 APPENDIX...........................................................................................................................................1
GRM2 CO2 GENERAL ARRANGEMENT (PM2067R4)......................................................................1
GRM2 CO2 CONNECTION SCHEMATICS (PS0748R7)....................................................................2
ADC-104 GENERAL ARRANGEMENT (PM2098)..............................................................................3
ADC-104 PANEL MOUNTING DETAILS (PM2247)............................................................................4
ADC-104 CONNECTION SCHEMATIC (PS0753R7)..........................................................................5
GRM2 CO2 WITH ADC-104 INSTALLATION OVERVIEW (PS0790) .................................................6
RM2C-104-ATM2R CONNECTION DETAILS (PS0768).....................................................................7
NETWORK SENSOR MOUNTING AND CONNECTIONS (PS0778)..................................................8

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Revision
Details
Checked
2-0:
17th April 2014
RS485 networked sensor information added.
AK
2-1:
6th Nov 2015
Clarified display and behaviour in relation to RS485 networked
SAMMs measuring oxygen.
Added note to explain that ATM2R must be located next to the gas
sensor.
Further information added regarding networked gas sensors.
More details added to door and network module replacement
procedure.
Checked column added to this table.
Styx replacement procedure updated.
Multiple corrections.
DG
2-2:
7th Sept 2016
System test section updated.
Quality management logos added.
Optional ADC terminal panel details updated.
DG
2-3:
25th Jan 2017
Improved instructions for making a network connection to the
GRM2.
System test instructions updated.
Zero calibration instructions for smartGAS sensors added.
AK
2-4:
4th Apr 2017
Field calibration instructions for two types of CO2 sensor added.
Field calibration routine for a GDS sensor on RS-485 SAMM added.
JW
2-5:
21st Apr 2017
Revisions to field calibration instructions for CO2 sensor.
JB
2-6:
30th May 2017
Wiring schematics for Clairair CO2 sensor added.
Amended field calibration instructions for CO2 sensor.
JB
2-7:
8th March 2018
Calibration and test procedures added for Bacharach MGS.150
sensor
PS0778 updated to include Bacharach MGS.150 details
Parasense logos updated
JB
5
March 2020
Updated addresses
JH

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1 INTRODUCTION
The Parasense GRM2 CO2 series monitors are advanced refrigerant leak detection devices utilising
infrared absorption sensors to analyse air samples.
Dependent on model, the monitor will have 4, 8, 12, or 16 individual internal SAMMs (SAMpling
Module), each having their own pump and filter. Each SAMM is connected to the area to be sampled
by semi-rigid nylon pipework, referred to as freeway. The specific area can then be further subdivided
into small regions using a manifold with multiple sampling pipes, known as spur kits (refer to the
installation guide within this manual). This multi sampling technique ensures that likely sources of
refrigerant leakage can be specifically targeted.
An additional method of leak sensing is also available. Local gas sensors can be connected via the
RS485 network terminals. Samples are gathered locally and the information relayed back to the
GRM2 CO2 via the RS485 network connection. A Parasense ATM2R cluster module is required for
each network sensor; together these are referred to as an RS485 networked SAMM. An additional
beacon/sounder can be connected to the ATM2R cluster module. The total number of network gas
sensors that can be used is dependent on the individual application. Please contact Parasense for
further information.
For both internal SAMMs and RS485 networked SAMMs, Alarms can be generated at three different
levels described as ‘Alert’, ‘Alarm’and ‘Critical’, these alarms can be signalled to other devices using
the 16 configurable relays. The current alarm status is indicated on the 169mm (6.5”) TFT LCD
display.
The ADC-104 is an optional terminal panel used in conjunction with the GRM2 CO2 to increase the
available number of beacon/sounders, terminal connections and integration with onsite facility
management systems. For full details of the ADC-104 please refer to the O&M Manual.

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GENERAL ARRANGEMENT

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2 INSTALLATION GUIDE
ENCLOSURE DIMENSIONS
GRM2-104D2-
116CO2
A
B
C
D
E
F
G
H
J
WEIGHT
Metric (mm)
550
500
150
600
450
650
25
620
700
22Kg
Imperial (In)
21.7
19.7
5.9
23.6
17.7
25.6
1.0
24.4
27.5
48.4lb
The monitor enclosure is not intended for external use. Where possible the enclosure and pipework
should be positioned in areas with similar environmental conditions.
MONITOR FITTING INSTRUCTIONS
As the installation will require the disconnection and reconnection of main electrical circuits, work
must be carried out by SUITABLY QUALIFIED PERSONNEL ONLY, and must be in accordance with
the current regulations.
Four fixing brackets are supplied loose, choose orientation (horizontal / vertical), insert expanding
nuts (if an internal fixed nut is not fitted) into holes in back of enclosure, push bolt through bracket to
nut and tighten.
Mount the monitor on a solid vertical surface in a non-exposed area, in a position where the L.C.D
screen can be easily and safely accessed, and where the environmental conditions are within;
Temperature
-9°C to 50°C (15°F to 123°F)
Relative Humidity
0% to 95% (non-condensing)
Space should be available around the unit to allow the opening of the door and fitting of sampling
pipework, power and communications cables.

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ELECTRICAL REQUIREMENTS
Each monitor requires an earthed, AC single phase mains supply in the range 100 to 240 volts, 50 to
60 Hz, protected by a 5 amp fuse or similar over current circuit breaker. Power consumption for this
monitor is 65 watts.
The final connection should be made as indicated, incorporating a water tight strain relief bush with a
smoothly rounded opening, through the detector enclosure.
Cable used shall be RATED for the maximum current of the equipment, and shall be certified or
approved by a recognized testing authority.
The cable anchorage shall relieve the conductors of the cable from strain, including twisting, where
they are connected within the equipment, and shall protect the insulation of the conductors from
abrasion. The protective earth conductor, if any, shall be the last to take the strain if the cable slips in
its anchorage.
Cable anchorages shall meet the following requirements:
1) The cable shall not be clamped by a screw which bears directly on the cable.
2) Knots in the cable shall not be used.
3) It shall not be possible to push the cable into the equipment to an extent which could cause a
hazard.
4) Failure of the cable insulation in a cable anchorage which has metal parts shall not cause
accessible conductive parts to become hazardous live.
5) It shall not be possible to loosen the cable anchorage without the use of a tool.
6) It shall be designed so that cable replacement does not cause a hazard, and it shall be clear
how the relief from strain is provided.
A compression bushing shall not be used as a cable anchorage unless it is suitable for use with the
mains supply cable supplied with it or specified for it by the manufacturer.

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MAINS INPUT CONNECTIONS
SINGLE GROUND EARTH SCREW CONNECTION

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RELAY CONNECTIONS
16 separate, volt-free, configurable change-over relays are provided rated at 5.0 amps (resistive). We
recommend that contact voltages should not exceed a nominal 24Vac/dc.
Two pilot relays are also provided on the power input module, voltages should not exceed 240 volts,
rated at 5 amps (resistive). These are activated using relays 1 & 2 on the network module in
conjunction with the 24Vdc auxiliary supply.
16 Configurable Relays on Network Module
Dual Pilot Relay Module
The relays are configured using the configuration tool. Refer to the monitor setup section of this
manual for more information.
Relays become energised when the monitor is ‘powered up’, i.e. ‘C’ and ‘NO’ are linked, ‘C’ and ‘NC’
are open circuit. On loss of power or an alarm situation (see the monitor setup section of this manual)
the relays become de-energised, i.e. ‘C’ and ‘NC’ are linked, ‘C’ and ‘NO’ are open circuit.
If a fault relay has been allocated, this relay will de-energise if a fault is detected. The fault cause will
be shown on the display screen, and the green traffic light will flash. This condition will remain until
the fault has been rectified.
Refer to ‘cable connections, main PCB (network module)’ for more information.

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EXTERNAL COMMS
An Ethernet socket is available for local area network (LAN) or wide area network (WAN)
communications. Connection to the GRM2 CO2 is via the network module mounted RJ45 connector.
FREEWAY INSTALLATION GUIDELINES
Parasense sampling pipework, known as freeway, is used to draw samples of air from areas of
potential leakage to the respective internal SAMM of the GRM2 CO2 monitor. A typical installation is
shown below:
NOTE: Spur kit lengths shown are indicative only. Spur kit freeway pipe lengths must always be
5m/16ft (coil excess freeway)
Internal Ethernet Socket
on network module

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INSTALLATION –DO’S
Maximum of one spur kit per internal SAMM.
Maximum of 4 way split.
Spur kit freeway pipe lengths must always be 5m/16ft (coil excess freeway). No exceptions.
Ensure that the freeway is pushed fully into the connectors on the SAMM and spur kit branch
connectors.
Support and clip all freeway and spur kit branch connectors.
Ensure that the freeway filters always point downwards.
Attach identity markers to both ends of the pipework.
Use continuous lengths of freeway (DO NOT JOIN).
Sample points from a single SAMM must all be in the same room.
Locate sample points as close as possible to the potential leakage areas.
Cut the freeway straight using the Parasense supplied cutter.
INSTALLATION –DON’T’S
Exceed 150m/492ft of freeway (including all spur freeway; E.g. for an installation with
100m/330ft of freeway + 4-way 5m/16ft spur kit, the length would be 120m/394ft).
Flatten or kink the freeway.
Bend the freeway at a radius of less than 150mm/6".
Run the freeway from a warm place through a very cold space.
Expose the freeway or spur kit to temperatures in excess of 60C/140F, or less than
-30C/-22F.
Let the spur kit filters ever be immersed in water or any other liquids.
Mix spur kit freeway of different lengths on the same SAMM.
Run freeway in areas where it may be stood on or restrict access to other equipment.

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NETWORK MODULE CONNECTIONS

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BEACON INSTALLATION
Remote beacon/sounders may be installed. The maximum number of beacon/sounders that can be
powered by the GRM2 CO2 is determined by the following information:-
Internal 24V DC PSU spare capacity:
1.2A up-to 50°C (122°F) enclosure temperature
(max 10 Parasense Beacon/sounders)
0.6A between 50-60°C (122-140°F) enclosure temperature
(max 5 Parasense Beacon/sounders)
No spare capacity above 60°C (140°F)
Parasense Beacon/sounder Imax at 24V DC:
When wired C-NC = 110mA
If the optional ADC auxiliary terminal panel is installed, refer to the wiring schematics in the appendix
of this manual.
If no ADC auxiliary terminal panel is installed, beacon connection details are as follows:
Relay Connection on Network Module
Auxiliary Supply and additional 0V
landing points on network module

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OPTIONAL RS485 NETWORKED GAS SENSORS
Optional network gas sensors are hard-wired to the GRM2 using the RS485 connections on the main
network module.
An overview of a GRM2 system using RS485 networked gas sensors is shown below. The analogue
sensor trip module (RM2C-104-ATM2R) must be installed at the gas sensor end of the installation,
either inside or outside the room being monitored or as near as possible to the area being monitored
(in order to keep the connection between the analogue sensor trip module and gas sensor as short as
possible). For further installation instructions please refer to PS0768 in the appendix.

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OPTIONAL ATM2R SINGLE/MULTIPLE BEACON INSTALLATION
Each analogue sensor trip module (RM2C-104-ATM2R) can accommodate up to two
beacon/sounders
Below is the diagram for the connection of beacon/sounders:
Parasense Beacon

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OPTIONAL NETWORKED GAS SENSORS
The gas sensors are wired to the analogue sensor trip modules (RM2C-104-ATM2R) as detailed
below:
Some examples of the gas sensors are pictured below:

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OPTIONAL ANALOGUE SENSOR TRIP MODULE
The analogue sensor trip module (RM2C-104-ATM2R) is wired as follows on the RS485 network:
The analogue sensor trip module, with beacon test button:

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3 ADC-104 TERMINAL PANEL (OPTIONAL)
The ADC-104 terminal panel is used in conjunction with the GRM2 CO2 to increase the available
number of beacon/sounders, terminal connections and integration with onsite facility management
systems.
ADC-104 DIMENSIONS
ADC Terminal Box
A
B
C
D
E
F
WEIGHT
Metric (mm)
300
400
150
360
345
440
10kg
Imperial (Inches)
11.8
15.7
5.9
14.2
13.6
17.3
22lb
ADC-104 FITTING INSTRUCTIONS
As the installation will require the disconnection and reconnection of main electrical circuits, work
must be carried out by SUITABLY QUALIFIED PERSONNEL ONLY, and must be in accordance with
the current regulations.
Enclosure Fitting Guide
1. It must be mounted to a solid vertical surface or structure capable of supporting the stated
weight. We recommend the surface be built from concrete blocks or brick. It must be
positioned where the door can be fully opened and in a location that facilitates easy service and
maintenance.
2. The panel should be mounted using the fixed brackets as shown in the ‘Front View’ above.
3. Fixings should be 4mm (1/8”) or 5mm (3/16”) screws or bolts minimum 40mm (1.5”) long with
plain washers and suitable wall plugs.
4. The panel should be located adjacent to the GRM2 or 3300RM2 that it is to be connected to as
the factory supplied interconnection looms are only 1.5M (5ft) long. The gap between the
GRM2 and ADC-104 should be no greater than 150mm (6”) as shown on the ‘Installation
Overview’ below.