ARJAY ENGINEERING 4200-IR-4 Manuale utente
MODEL 4200-IR-2 (Up to 2 Sensors)
MODEL 4200-IR-4 (Up to 4 Sensors)
MODEL 4200-IR-6 (Up to 6 Sensors)
Refrigerant Monitor
User Manual
Technical Support
Continental North America Toll Free 1-(800) 387-9487
Ph: +1 (905) 829-2418 Fx: +1 (905) 829-4701
A Product of Arjay Engineering Ltd.
Oakville, Ontario, Canada
www.ArjayEng.com
MODEL:
HARDWARE NO.:
SOFTWARE NO.:
SERIAL NO.:
Model: 4200-IR User Manual Rev: 3.0
2
TABLE OF CONTENTS
1.0 INSTRUMENT OVERVIEW ............................................................................................ 3
1.1 Features ............................................................................................................. 6
1.2 Main Panel Model Number ................................................................................ 6
1.3 Specifications ..................................................................................................... 6
1.4 Gas Levels ......................................................................................................... 7
2.0 INSTALLATION ............................................................................................................... 8
2.1 Main and Remote Panel Installation .................................................................. 8
2.2 Sensor Installation .............................................................................................. 8
2.3 Electrical Installation .......................................................................................... 9
2.4 Glossary of Symbols .......................................................................................... 11
3.0 STARTUP AND CALIBRATION ...................................................................................... 12
3.1 Startup ................................................................................................................ 12
3.2 Screen Menu Background Information .............................................................. 13
3.2.1 Keypad Main Menu Entry .................................................................... 13
4.0 SYSTEM CONFIGURATION .......................................................................................... 14
4.1 Alarm Setup ....................................................................................................... 14
4.2 Diagnostic Information ....................................................................................... 15
4.3 Sensor Setup ..................................................................................................... 16
4.3.1 Individual Sensor Setup ...................................................................... 16
4.3.2 Number of Sensors.............................................................................. 17
4.3.3 Analog Input Trim ................................................................................ 17
4.4 System Test ....................................................................................................... 17
4.5 Factory Setup ..................................................................................................... 18
4.6 Factory Defaulted Sequence of Operation ........................................................ 18
4.7 Date and Time .................................................................................................... 18
5.0 MAIN DISPLAY ............................................................................................................... 19
6.0 SENSOR CALIBRATION ................................................................................................ 20
7.0 TROUBLESHOOTING .................................................................................................... 21
8.0 MODBUS MAP AND DETAIL (if ordered) ....................................................................... 22
8.1 Modbus Commands Supported ......................................................................... 22
8.2 Register Map ...................................................................................................... 22
9.0 DETAILED ELECTRICAL AND DIMENSIONAL DRAWINGS ........................................ 23
TABLE OF FIGURES
Figure 1 – System Overview .......................................................................................................... 4
Figure 2 – Electrical Installation Overview ................................................................................... 10
Figure 3 – Startup Main Screen View .......................................................................................... 12
Figure 4 – System Configuration Main Screen View ................................................................... 14
Figure 5 – Alarm Setup Screen View ........................................................................................... 14
Figure 6 – Diagnostic Information Screen View ........................................................................... 15
Figure 7 – Sensor Setup Screen View ......................................................................................... 16
Figure 8 – Analog Input Trim Screen View .................................................................................. 17
Figure 9 – System Test Screen View ........................................................................................... 17
Figure 10 – Date and Time Screen View ..................................................................................... 18
Figure 11 –Main Display Screen View ......................................................................................... 19
Model: 4200-IR User Manual Rev: 3.0
3
1.0 INSTRUMENT OVERVIEW
The Arjay Model 4200-IR monitors for refrigerant leaks in Mechanical Equipment Rooms (MER)
and chiller rooms.
The monitoring system is comprised of three main components: One main control panel (4200-IR-
MP), a minimum of one remote alarm panel and a minimum of one remote sensor.
Depending on the installation requirements, there may be up to 3 remote alarm panels with HMI
display (Model: 4200-IR-RP) for indoor use or 6 remote panels with mechanical switch for outdoor
use (Model: 4200-IR-N4-RP) and up to 6 remote sensors
Main control Panel Models:
4200-IR-MP-2 Up to 2 Sensors
4200-IR-MP-4 Up to 4 Sensors
4200-IR-MP-6 Up to 6 Sensors (With Separate Power Supply)
Note: For additional remote panel and sensors, consult factory.
The Model 4200-IR is designed in accordance with guidelines indicated by ASHRAE Standard 15
and CSA B52. Local or site specific regulations may apply to your application. Be aware and
compliant with all applicable regulations for your installation.
SYSTEM WITH OUTDOOR REMOTE PANEL
Model: 4200-IR User Manual Rev: 3.0
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SYSTEM WITH INDOOR REMOTE PANEL
Figure 1 – System Overview
Model: 4200-IR User Manual Rev: 3.0
5
Main Panel
The main panel is located inside the machinery room and is typically installed near a main door for
ease of access and observation of alarms. In large rooms, you may want to consider additional
remote alarms.
A warning alarm is activated at a low level setpoint and is indicated by the touch screen flashing
yellow. The screen text also shows a low alarm and indicates the ppm refrigerant level. Typically,
no action is required at this level; it is a warning only. R1 relay can be set as Low Alarm or Fault.
High alarm relays are activated above the TWA-TLV ppm level determined for the refrigerant gas
being monitored. One DPDT relay each is provided for BAS or Boiler, Chiller and Ventalation Fan.
During a high alarm, the main panel provides a visual flashing amber beacon and an audio buzzer.
The buzzer can be silenced during an alarm condition but the beacon will only turn off when a gas
alarm has cleared and the alarm condition has been acknowledged at the panel.
The main panel screen provides a Push-to-Test and additional user interface menus for
diagnostics, set-up and general Help information.
Remote Panel
A remote panel is located outside of each ‘entranceway’ to the machinery room. Remote Panels
are required to indicate an alarm condition to warn of entry into the room. Arjay remote panels
include an amber flashing beacon and buzzer in addition to the screen display. For outdoor
application it is recommended to use Model: 4200-IR-RP-N4 version. This model replaces the HMI
display and uses mechanical switches. This model can operate in temperature of -20°C to +55°C.
A buzzer is not required by code but is included on the standard Arjay remote panel. It can be
silenced during an alarm condition and will reset when the alarm condition is cleared.
The touch screen display indicates the ppm concentration and will flash at warning and high alarm
levels.
A Push-toTest can be accessed on the remote panel by passcode (not applicable for outdoor
versions). Diagnostic and Help menus are also accessible on the remote screens.
Fan and Chiller Override Switches
Although chiller switches are not required as part of the refrigerant monitoring panels, code
guidelines require Ventilation Fan ON switches to be available inside and outside a refrigeration
machinery room. Arjay panels include Ventilation ON switches and Chiller OFF switches on all
panels. These will override the corresponding relay within the Main Control Panel. The switches on
the remote panel are passcode protected or Keylocked (outdoor version).
Since the codes do not require the chiller to be interlocked with Refrigerant Panel, the Chiller OFF
switch is not shown on the factory shipped screen. This can be enabled in alarm setup.
Remote Sensor
The sensor is a non-dispersive infrared technology designed to selectively target the refrigerant
gas type.
The sensor continuously monitors the air and sends a signal to main control panel. The signal is
proportional to the ppm refrigerant concentration at the sensor. Routine testing and calibration is
recommended to ensure the sensor is responsive and accurate. Calibration is done at the sensor
(see sensor manual).
Model: 4200-IR User Manual Rev: 3.0
6
Fan Running Indication
A fan running icon appears in the main screen when the fan operating input voltage (24VDC) is
connected thru the auxillary starter contacts to the main panel. The icon will indicate low fan and/or
high fan speed. Refer to ventilation light wiring diagram for more detail.
1.1 Features
• Microprocessor based Controller
• Relays for Alarm Outputs:
Four Relays for 4200-IR-2-MP
Five Relays for 4200-IR -4-MP
Six Relays for 4200-IR-6-MP
• Touch Screen interface with passcode protection and display ppm value
• Diagnostic, set-up and Help menus on all screens
• Non-dispersive infrared sensor for long life and gas selectivity
• Designed in accordance with CSA B52 and ASHRAE Standard 15
1.2 Main Panel Model Number
• 4200-IR-2-MP Two Sensor Inputs
• 4200-IR-4-MP Four Sensor Inputs
• 4200-IR-6-MP Six Sensor Inputs (With separate power supply)
**Maximum Remote Panel: 3 for Indoor version (consult factory if more than 3 required) or
6 for Outdoor version for all above models
1.3 Specifications
Power Input: 100-240 vac, 50/60 Hz,
1.95A max. (for 2 and 4 sensor models) or 4A max (for 6 sensor model)
User Interface:
Touch Screen Full Colour 6 “ display on Main Panel
Monochrome 4” on Remote (Indoor Version Only)
Outputs:
Relay Output DPDT relay, 8 A @ 250 vac dry contacts
Selectable failsafe or non-failsafe
Programmable time delay: 0 – 1200 seconds ON and OFF
One relay each for:
• Low Setpoint or Fault (Selectable)
• High Setpoint Boiler or BAS interlock
• High Setpoint Fan Interlock
• High Setpoint Chiller Interlock*
*(2x DPDT for 4200-IR-4-MP and 3x DPDT for 4200-IR-6-MP)
RS485 Modbus Optional
Analog Output Optional
Bacnet Optional
Model: 4200-IR User Manual Rev: 3.0
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Sensor Non-Dispersive Infrared
24 vdc powered from Main Panel
Expected life: 5-7 years under normal conditions
Environmental:
Ambient Temperature 0°C to +55 °C (Main & Remote panels with HMI displays must be installed
indoor).
-20°C to +55 °C (4200-IR-RP-N4 Remote Panel with Mechanical Switch)
Relative humidity 0 to 95% (non-condensing)
Installation Category II
Pollution Degree 2
Mechanical Specification: Refer to dimensional drawing
1.4 Gas Levels
These factory defaulted settings can be changed in the field by the customer to suit specific
requirements.
GAS NAME LOW LEVEL HIGH LEVEL RANGE
R123 30 50 1031
R134A 500 800 1031
R22 500 800 1031
R11 500 800 1031
R404A 500 800 1031
R407A 500 800 1031
R407C 500 800 1031
R410A 500 800 1031
R507 500 800 1031
Model: 4200-IR User Manual Rev: 3.0
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2.0 INSTALLATION
NOTE: If any damage to the instrument is found, please notify an Arjay Engineering Ltd.
representative as soon as possible prior to installation.
2.1 Main and Remote Panel Installation
Choose a mounting location in accordance with good instrument practice. Extremes of ambient
temperature and vibration should be avoided (see specifications and installation drawing).
Sensors and remote panels can be mounted up to 300 meters away from the main panel.
Important Note: The controller can be set in a Failsafe mode. This means that the relays are in
an energized state during normal operation. The N.O. relay contact will be held closed and the
N.C. relay contact will be held open during a normal condition. This will allow the relay to return to
its non-energized (shelf) state during an alarm, fault or power failure condition. Wire accordingly.
2.2 Sensor Installation
The sensor is to be mounted near the refrigerant leak source and protected from extremes of
temperature and damage. Keep the sensor accessible for routine calibration. Do not block with
equipment or store materials or containers in front of the sensor.
It should be mounted so the bottom of the sensor housing is approximately 250mm to 450mm (10”
to 18”) above floor grade to protect it from damage from cleaning equipment and minor wash
down.
The sensor should be mounted close to the potential refrigerant leak source on the downstream
side of any room ventilation currents. One sensor can often be used to monitor two adjacent
chillers.
The sensor should be mounted above any risk of flooding.
Note: Sensor cable shall have a minimum specification:
- 18 AWG, 4 Wire, 2 Pair, Twisted, Shielded Cable (i.e. Belden 9552 or equivalent).
Model: 4200-IR User Manual Rev: 3.0
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2.3 Electrical Installation
Refer to the drawings provided by the contractual engineer for your project and the drawings
included with this manual.
SYSTEM WITH OUTDOOR REMOTE PANELS
Model: 4200-IR User Manual Rev: 3.0
10
SYSTEM WITH INDOOR REMOTE PANELS
Figure 2 – Electrical Installation Overview
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