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Merlin
RG Series
VRF Refrigerant Gas Sensor
INSTALLATION & OPERATION
Please read these instructions carefully before use and retain for future reference.
These instructions can also be downloaded in electronic form on the product website.
americangassafety.com
info
americangassafety.com
6304 Benjamin Road, Suite 502, Tampa FL 33634 Tel: (727) 608-4375 -
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Summary of Contents for AGS Merlin RG Series
- Page 1 Merlin RG Series VRF Refrigerant Gas Sensor INSTALLATION & OPERATION Please read these instructions carefully before use and retain for future reference. These instructions can also be downloaded in electronic form on the product website. americangassafety.com info americangassafety.com 6304 Benjamin Road, Suite 502, Tampa FL 33634 Tel: (727) 608-4375 -...
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Page 2: Table Of Contents
Merlin RG Installation & Operation Manual CONTENTS IMPORTANT INFORMATION ....................3 Manufacturer’s Warranty ....................3 INSTALLATION ......................4 General Information ............................4 Positioning ..............................4 Mounting Instructions ........................... 5 PCB Overview ..............................5 Power Wiring ..............................6 +10V Output Wiring ............................6 VFC Relay Wiring ............................ -
Page 3: Important Information
Merlin RG Installation & Operation Manual IMPORTANT INFORMATION Take extra care where this symbol is used to understand the nature of any potential hazards and how to avoid them. Before any installation, use or maintenance, read this manual carefully. This product is for Dry Environment Use only. Avoid prolonged use in dusty environments. -
Page 4: Installation
Merlin RG Installation & Operation Manual INSTALLATION General Information Failure to observe the following may cause injury to persons and/or property. The RG detector series is to be installed in a permanent location and is intended to continuously monitor the ambient air for refrigerant levels. -
Page 5: Mounting Instructions
Merlin RG Installation & Operation Manual Mounting Instructions Remove the front cover by removing the screw underneath the housing using socket wrench provided. Mark mounting holes ensuring surface is flat to avoid distortion. Using the backplate, mark points and drill 0.2” hole, insert plugs and use screws provided. Cable entry is provided via rear 1/2”... -
Page 6: Power Wiring
Merlin RG Installation & Operation Manual Power Wiring Consider voltage drops due to cable resistance and strip the cables as short as possible ensuring bare wires, e.g., wire shields, do not contact with the circuit board (risk of short-circuit). 110V AC POWER / LINE IN 24V IN AC/DC +10V Output Wiring A linear +10V output is normally used to regulate external fan speed controllers (supplied separately). -
Page 7: Vfc Relay Wiring
Merlin RG Installation & Operation Manual VFC Relay Wiring This is a dry contact/volt free connection to a BMS (building management system) or central control panel to send an alarm signal upon the defined RG level. This terminal can be used in conjunction with other external relays that affect other devices, and controls such as purge fans, audible alarms, strobe/beacons etc. -
Page 8: Analog Configuration Switches
Merlin RG Installation & Operation Manual Analog Configuration Switches LABEL ACTION OPTION DEFAULT NOT USED ON: 0-1000 ppm (RG) Range* OFF: 0-5000 ppm 5000ppm ON: 175 ppm (RG) Low Level Warning OFF: 350 ppm 350ppm ON: 800 ppm (RG) High Level Warning OFF: 1000 ppm 1000ppm ON: NO (Normally Open) -
Page 9: Operation
Merlin RG Installation & Operation Manual OPERATION RG Warning Levels Before leaving the device for normal operation, check configuration for proper settings. After connecting power, the device will enter a warm-up period to allow the device to establish connections and sensor elements to stabilize before a valid reading/output. -
Page 10: Calibration Check
A suitably calibrated gas mix bottle should be used observing the precautions listed below, the gas flow used for testing should be ≤500 SCCM (0.5 LPM). Offer up the applicator hose with a 32mm cone that can be supplied from AGS on request. Apply the cone directly over the sensing element. -
Page 11: Technical Specification
Merlin RG Installation & Operation Manual TECHNICAL SPECIFICATION Mounting Wall Mounted Entry 1” DIA Rear Entry and snap offs for side trunking Mechanical Size (W x H x D) 3.38 x 4.48 x 1.3” Weight (Max) 36oz Max Enclosure ABS UL Flame retardant – IP40 24V AC/DC Power Rating 12-24VDC (11-32 VDC) / 24VAC, (20-27 VAC) 60Hz 110VAC Power Rating... - Page 12 Every effort is made to ensure the accuracy of this document; however, AGS can assume no responsibility for any errors or omissions in this document or their consequences. AGS would greatly appreciate being informed of any errors or omissions that may be found in the content of this document.
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