AGS Merlin WTM Water Temperature Monitor Instruction Manual
- June 11, 2024
- AGS
Table of Contents
AGS WTM Installation, Operation & Maintenance
Merlin WTM
WATER TEMPERATURE MONITOR
INSTALLATION & OPERATION INSTRUCTIONS
Please read these instructions carefully and retain for future use.
These instructions can be downloaded in electronic form on the product
website.
http://www.americangassafety.com
Important Warning Statements
Where this symbol is used, the manual must be consulted to understand the
nature of any potential hazards and how to avoid them.
Before any installation, use or maintenance read this manual carefully.
The information within this manual should be referenced for typical
installation and operation only.
For site specific requirements that may deviate from the information in
this guide – contact your supplier.
If the equipment is used in a manner not specified by the manufacturer,
the safety and protection provided by the equipment may be impaired.
Installation must be in accordance with recognised standards in the
country concerned, for North America, NEC / CEC regulations should be
followed.
This product is designed for indoor operation only.
Cables must be protected against mechanical damage.
The internal fuse should be replaced only with the same type. Anti-surge fuse
3.15A 250Vac 5×20.
This device requires a continual supply of electrical power – it will not work
without power.
A switch or circuit breaker must be fitted, it must be accessible and marked
as the disconnecting device!
This device may not safeguard individuals with specific medical conditions. If
in doubt, consult a doctor/physician.
Your product should reach you in perfect condition, if you suspect it is
damaged, contact your supplier.
Manufacturer’s Warranty
Warranty coverage: The manufacturer warrants to the original consumer
purchaser, that this product will be free of defects in material and
workmanship for a period of twelve months (1 year) from date of purchase.
The manufacturer’s liability hereunder is limited to replacement of the
product with repaired product at the discretion of the manufacturer. This
warranty is void if the product has been damaged by accident, unreasonable
use, neglect, tampering or other causes not arising from defects in material
or workmanship. This warranty extends to the original consumer purchaser of
the product only.
Warranty disclaimers: Any implied warranties arising out of this sale,
including but not limited to the implied warranties of description,
merchantability and intended operational purpose, are limited in duration to
the above warranty period. In no event shall the manufacturer be liable for
loss of use of this product or for any indirect, special, incidental, or
consequential damages, or costs, or expenses incurred by the consumer or any
other user of this product, whether due to a breach of contract, negligence,
strict liability in tort or otherwise. The manufacturer shall have no
liability for any personal injury, property damage or any special, incidental,
contingent, or consequential damage of any kind resulting from gas leakage,
fire, or explosion. This warranty does not affect your statutory rights.
Warranty Performance: During the above warranty period, your product will be
replaced with a comparable product if the defective product is returned
together with proof of purchase date. The replacement product will be in
warranty for the remainder of the original warranty period or for six months –
whichever is the greatest.
Waste disposal for consumers of electrical & electronic equipment.
When this product reaches the end of its life it must be treated as Waste
Electrical & Electronics Equipment (WEEE). WEEE marked products must not be
mixed with general household waste, but kept separate for the treatment,
recovery and recycling of the materials used.
Please contact your supplier or local authority for details of recycling
schemes in your area.
Installation
Typical Application & Location
The AGS Water Temperature Monitor (WTM) is carefully designed for health care
facilities to monitor and control the water supply system. The controller
incorporates a simple user interface to reset and/or silence alarm condition.
Minimum and Maximum permitted water temperatures are configurable via the
internal switch and fascia controls upon installation.
Located and installed in positions determined by those who have knowledge of
the process plant system and equipment involved, and in consultation with both
safety and electrical engineering personnel.
The monitor should be installed in the correct orientation, as recommended by
the manufacturer at a height to suit access and status observation and is
designed for indoor operation only.
Mounting & Cabling
If mounting direct to wall – ensure the wall surface is flat to prevent
base distortion.
Where suitable cable glands/conduits are used for wire entry, use 20mm
(3/4 inch) max.
Restrain the hazardous live wiring from accidental loosening to prevent
wires from moving after installation and touching parts of opposite polarity
or at low voltages.
A switch or circuit breaker must be fitted, it must be accessible and
marked as the disconnecting device.
**** Isolate the equipment from all hazardous live power sources before
opening the cover.
-
Carefully remove the front cover from the unit by using an M3 socket wrench.
-
Using the rear base – mark mounting holes to the wall or align with an appropriate gang/pattress box.
-
Fixing straight to wall – drill 0.2” (5mm) hole, insert plugs and use the four screws (No.4 Pozi) provided.
Alternatively – Fix direct to a vertical 2-gang/double electrical pattress box. -
There are pre-fractured areas for cable entry on the rear of the base and pilot holes positioned on the top and bottom of the enclosure suitable for entry points up to ¾” (20mm). Drill out as necessary ensuring all swarf is removed from the box and holes have smooth edges.
-
Secure the front cover with all M4 bolts and insert security caps provided.
Circuit Board Terminals
Damage to PCBs when creating cable entry points may void any warranty!
Any damage attempting to remove the circuit board may void any warranty!
All Class 2 wiring is to be installed within flexible tubing to maintain
segregation between circuits!
Wiring of different circuits shall be separated by means of routing,
clamping or barrier!
A switch or circuit breaker must be fitted, it must be accessible and
marked as the disconnecting device!
A disconnector is required for the 24V supply, and an adequate
overcurrent device is fitted!
For field connections use wires suitable for at least 167°F (75°C)
Connecting both mains 120V~ and 24Vac/dc power is considered misuse –
use only one power input!
**** Terminals are pluggable for ease of wiring and therefore subject to
misplacement resulting in a hazardous condition!
Power Inputs
The controller requires an AC power supply of 110/240VAC wired to the
[POWER/LINE IN] connector using a 3A switched fused spur.
Alternatively, the unit can be powered via the 24VAC [POWER IN] terminal. When
power is introduced, a red LED will illuminate on the front of the controller
on the AGS Logo.
Valve Outputs
Use grounding terminals for gas valves not considered class II apparatus!
Connecting two valves to both mains 120V~ and 24V~ simultaneously is
considered misuse – use only one valve output!
A water solenoid valve should be powered using one of the terminals marked
[VALVE OUT].
Terminals offer control via 100-120V~ or 24V~. When wired to a normally closed
water solenoid valve, the WTM controller can be used to isolate the water
supply when water temperature is outside of allowable Max and Min temperature
settings.
BMS Relay Output
Connections are available on the board for Building Management Systems. [NO –
Normally Open] [C – Common] [NC – Normally Closed]. This is a relay that
changes state in alarm / water off.
0-10V Analog Output
A single 0-10V output is scaled to the PT100 temperature sensor as follows.
| 32°F | 50°F | 68°F | 86°F | 104°F | 122°F | 140°F | 158°F | 176°F | 194°F | 212°F |
|---|---|---|---|---|---|---|---|---|---|---|
| 0V | 1V | 2V | 3V | 4V | 5V | 6V | 7V | 8V | 9V | 10V |
PT100 Temperature Sensor Input Adjust Min and Max Allowable Water
Temperature
Turn On the dipswitch [SET] located on the circuit board to program Min and Max water temperature.
Using Up and Down arrows located on the front fascia select required Min temperature.
Press OK and repeat for Max temperature. Turn Off the dipswitch [SET] to exit temperature programming menu and save.
Operation
General
When power is supplied to the WTM controller, the LED on the logo will
illuminate Red. To turn the WTM controller off, disconnect electrical power
supply.
When the temperature falls outside the maximum or minimum temperature setting,
the water supply will be turned off and an audible alarm will sound which can
be turned off by pressing the MUTE button. Press RESET to clear alarm
condition and continue normal operation.
Display
The front display will show water supply status and current water temperature.
To see MIN and MAX water temperature settings press OK, programmed
temperatures will be displayed for ~5 seconds.
Adjust Min and Max Allowable Water Temperature
Turn On the dipswitch [SET] located on the circuit board to program Min and
Max water temperature. Using Up and Down arrows located on the front fascia
select required Min temperature. Press OK and repeat for Max temperature. Turn
Off the dipswitch [SET] to exit temperature programming menu and save.
Maintenance
**** Keep the equipment in good working order – follow these basic
principles.
✓ Remove any dust/debris from the outer enclosure regularly using a slightly
damp cloth.
✓ Never use detergents or solvents to clean the equipment.
✓ Never paint the equipment.
Specification
General
Model:| AGS VVTC – Water Temperature Controller
Size: (H x W x D)| 5.95 x 4.37 x 1.97″ (151 x 111 x 50mm)
Housing Material:| ABS PA765 (Flame Rating UL94 V-1)
Mounting:| Wall/Surface Mounted. Indoor use only – Outdoor using weatherproof
cover.
Weight:| 11.2 oz (0.32g)
User Interface
Display:| 1.8″ Color Display
Screen Brightness:| N/A
Visual Indicators:| Power On LED
Audible Buzzer:| >60dB @ 3.28ft (1m). Quiet conditions.
Buttons:| Up, Down, OK, Reset, Mute
Language:| English
Power Supply
Power Consumption:| 1.2W Max
Power Input #1:| 100-120V- 50-60Hz
Power Input #2| 24VAC
Internal Fuse:| Anti-Surge 3.15A OP 250Vac
Equipment
Overvoltage Category:| II
Pollution Degree:| 3 (Unit Only)
Relays
BMS dry contact| 3A © 110V-
Environmental
Ingress Protection:| Not formally evaluated. IP4X Determined by inspection.
Operating:| -20 – 50°C 114 – 122°F 20 – 95% RH (non-condensing)
Storage:| -25 – 50°C /-13-122°F up to 95% RH (non-condensing)
Altitude Rating:| 2000m
Wiring
Typical| Min. 18AWG / 75°C min / Tinned copper.
Compliance
Electrical Safety| CE / UKCA / IEC BS EN 61010-1
Electromagnetic Compatibility| EN 61326-1: 2021 / FCC CFR 47 Parts 15, 107 &
109
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. For information not covered in this document, or if there is a requirement to send comments/corrections, please contact AGS using the contact details.
American Gas Safety LLC
www.americangassafety.com
Head office: 6304 Benjamin Road, Suite 502, Tampa, FL 33634
Tel:727-608-4375
Email:info@americangassafety.com
American Gas Safety LLC is the owner of this document and reserves all
rights of modification without prior notice.
Documents / Resources
| AGS
Merlin WTM Water Temperature
Monitor
[pdf] Instruction Manual
AGS-WTM-User-Manual.pdf, Merlin WTM, Merlin WTM Water Temperature Monitor,
Merlin WTM, Water Temperature Monitor, Temperature Monitor
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References
- American Gas Safety | Gas Detection | Control Systems | Solenoid Valves
- American Gas Safety | Gas Detection | Control Systems | Solenoid Valves
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