AGS Merlin Water Temperature Monitor Instruction Manual
- September 3, 2024
- AGS
Table of Contents
Merlin Water Temperature Monitor
“`html
Specifications
-
Product Name: Merlin WTM Water Temperature Monitor
-
Manufacturer: AGS
-
Application: Health care facilities water supply system
monitoring -
Power Supply: 110/240VAC
-
Power Input: 3A switched fused spur
-
Installation: Indoor use only
Installation Instructions
The AGS Water Temperature Monitor (WTM) is designed for health
care facilities to monitor the water supply system. Follow these
steps for installation:
-
Determine the suitable location in consultation with safety and
electrical engineering personnel. -
Mount the monitor at the recommended height for access and
observation. -
Connect the AC power supply (110/240VAC) to the [POWER/LINE IN] connector using a 3A switched fused spur.
-
Set the minimum and maximum water temperature limits using
internal switches and fascia controls.
Operation Instructions
The Water Temperature Monitor is easy to operate:
-
Reset or silence alarm conditions using the user
interface. -
Monitor the water temperature readings regularly.
Settings
The unit settings include:
- Water Temperature Alarm Settings
- Unit Settings
- Factory Set Condition
Maintenance
Regular maintenance of the Water Temperature Monitor is
essential for proper functioning. Refer to the manual for specific
maintenance tasks.
FAQ (Frequently Asked Questions)
Q: Can the monitor be used outdoors?
A: No, the monitor is designed for indoor use
only.
Q: How to reset the alarm condition?
A: Use the user interface to reset or silence
the alarm condition.
Q: What should I do with the product at the end of its
life?
A: The product must be treated as Waste
Electrical & Electronics Equipment (WEEE). Contact your
supplier or local authority for recycling details.
“`
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.
americangassafety.com
Issue 1
1
AGS WTM Installation, Operation & Maintenance
Content
Important Warning Statements……………………………………………………..3 Installation
………………………………………………………………………….4
Typical Application & Location ……………………………………………………………………………………..4 Mounting &
Cabling…………………………………………………………………………………………………….4 Circuit Board Terminals
……………………………………………………………………………………………….5 Power Inputs
…………………………………………………………………………………………………………….. 5 Valve Outputs
……………………………………………………………………………………………………………. 6 BMS Relay Output
………………………………………………………………………………………………………6 0-10V Analog
Output…………………………………………………………………………………………………..6 PT100 Temperature Sensor Input
………………………………………………………………………………… 6
Settings …………………………………………………………………………….. 7
Water Temperature Alarm Settings ……………………………………………………………………………….7 Unit
Settings………………………………………………………………………………………………………………7 Factory Set Condition
…………………………………………………………………………………………………. 8
Operation ……………………………………………………………………………8
Start Up…………………………………………………………………………………………………………………….8
Controls……………………………………………………………………………………………………………………. 9 Display
……………………………………………………………………………………………………………………..9 Normal Working Conditions
………………………………………………………………………………………. 10 Water Temperature High Pre-Alarm
……………………………………………………………………………. 10 Water Temperature High
Alarm…………………………………………………………………………………..10 Water Temp Low
Alarm……………………………………………………………………………………………..10 Faulty Sensor
………………………………………………………………………………………………………….. 11 Remote Emergency
Stop…………………………………………………………………………………………… 11 Turning Off the internal alarm
buzzer ………………………………………………………………………….. 11 Self-Test Function
……………………………………………………………………………………………………. 11
Maintenance ……………………………………………………………………… 11 Specification
……………………………………………………………………… 12
Issue 1
2
AGS WTM Installation, Operation & Maintenance
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 2.5A MAX 250VAC.
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.
Issue 1
3
AGS WTM Installation, Operation & Maintenance
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.
1. Carefully remove the front cover from the unit by using an M3 socket
wrench. 2. Using the rear base – mark mounting holes to the wall or align with
an appropriate gang/pattress box. 3. 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. 4. 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. 5. Secure the front cover with all M4 bolts and insert security
caps provided.
Issue 1
4
AGS WTM Installation, Operation & Maintenance
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!
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.
Issue 1
5
AGS WTM Installation, Operation & Maintenance
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] [COM Common] [NC – Normally Closed]. This is a relay that
activates on alarm and water off condition.
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
The connecting sensor must be a PT100 [3 wire type] and wired as shown.
Issue 1
6
AGS WTM Installation, Operation & Maintenance
Settings
Water Temperature Alarm Settings
To program the temperature alarm settings, turn ON the dipswitch [SETTINGS]
located on the circuit board.
If [AUTO RESET] is selected the alarm will automatically reset once the reset
temperature has been reached.
Temperature “T” Settings T. Alarm High T. Pre Alarm Hi T. Alarm Low T.
Autores. High
T. Autores. Low
Description
High temperature alarm setting for valve out relay. This must be set at least
5° above [T. Alarm Low] The maximum setting is 212/100°C. Pre-alarm relay
Low temperature alarm for valve out relay
With [Auto Reset] dip switch selected. Device automatically resets following
alarm high when the temperature drops to this setting.
With [Auto Reset] dip switch selected. Device automatically resets following
alarm low when the temperature rises to this setting.
Use the up/down arrows on the facia to cycle through the setting parameters, press OK to select the setting displayed in red, use the up/down arrows to adjust the value and press OK to set it.
Use the up/down arrows to navigate to the unit settings on the next page – or turn OFF the settings dip switch to return to normal operation.
Unit Settings
With the [SETTINGS] dip switch ON – use the up/down arrows to navigate to page
2 and 3 to adjust the unit settings.
Use the up/down arrows on the facia to cycle through the setting parameters, press OK to select the setting displayed in red, then use the up/down arrows to make an adjustment and press OK will set and save it.
Once all the settings have been correctly configured turn OFF the [SETTINGS] dip switch to return to normal operation.
Issue 1
7
AGS WTM Installation, Operation & Maintenance Settings page 2
Settings page 3
Settings Temp. Unit 0-10V OUT T.Strobe ON Buzzer Temp.Offset Strobe mode
Factory reset
Description Changed from to °C. Change 0-10V to 2-10V scaling Change the temperature the 24VDC strobe will activate Change the constant buzzer to 30sec duration A temperature Offset can be applied in the range from -5.0 to +5.0 For [T.set] the strobe will activate according with the T.Strobe ON setting. For [BMS] the strobe will activate when the BMS relay output is on indicating the water is off Select YES to reset the factory default settings
Factory Set Condition
Operation
Start Up
When the WTM controller is powered on, the display will illuminate and enters
a warmup phase during this period the software version is displayed.
Issue 1
8
AGS WTM Installation, Operation & Maintenance
Controls
MUTE: 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. RESET: Press this button
to clear an alarm condition and continue normal operation. UP/DOWN ARROWS:
With the [SETTINGS] dip switch ON – Navigate the settings page and adjust
settings. During normal operation use the arrows to navigate the front display
and settings screen OK: With the [SETTINGS] dip switch ON – set and save
adjusted settings.
Display
Front Display: will show water supply status ON/OFF, current water
temperature, and confirm the sensor is installed correctly.
Settings Display: will show the water temperature alarm values for Max/ Med [Pre-Alarm Hi} and Min.
Use the arrow buttons to navigate between the two displays.
Front Display
Settings Display
Issue 1
9
AGS WTM Installation, Operation & Maintenance
Normal Working Conditions
For normal conditions the water is ON and the temperature is within the
settings range.
Water Temperature High Pre-Alarm
The monitor has a pre-alarm output relay, once the water temperature exceeds
setting [T. Pre-Alarm Hi] the alarm relay will activate – see installation
section for connections.
Water Temperature High Alarm
If the water temperature exceeds the [T.Alarm High] the water valve will be
turned off and the alarm will be activated.
Water Temp Low Alarm
If the water temperature exceeds the [T.Alarm Low] the water valve will be
turned off and the alarm will be activated.
Issue 1
10
AGS WTM Installation, Operation & Maintenance
Faulty Sensor
If the temperature sensor is displaying “X” it is outside of acceptable
parameters, check the sensor is wired correctly and not damaged.
Remote Emergency Stop
If the remote emergency stop is activated the water will be turned off and the
internal alarm buzzer will be turned on.
Turning Off the internal alarm buzzer
The internal alarm buzzer can be permanently turned off by switch the internal
PCB Dip switch [BUZZER ON/OFF SWITCH] Self-Test Function
The monitor can be put into a self-test function by pressing the Test button
on the PCB for 3 seconds. The test button can be found above the terminals for
the PT100 sensor. Once the self-test is started the output relays and water
valve will be activated, during this test sequence a test screen will be
displayed.
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.
Issue 1
11
AGS WTM Installation, Operation & Maintenance
Specification
General Model: Size: (H x W x D) Housing Material: Weight: Temperature Measuring Range User Interface Display: Audible Buzzer: Buttons: Power Supply Power Consumption: Nominal Voltage IN #1: Nominal Voltage IN #2 Internal Fuse: Equipment Overvoltage Category: Pollution Degree: Relays BMS dry contact Environmental Ingress Protection: Operating: Storage: Altitude Rating: Wiring Typical Compliance Electrical Safety Electromagnetic Compatibility
AGS WTM Water Temperature Monitor 5.95 x 4.37 x 1.97″ (151 x 111 x 50mm) ABS
PA765 (Flame Rating UL94 V-1) 11.2 oz (0.32g) 0~100 °C / 32~212°F +/- 1°
1.8″ Color Display >85dB @ 10cm. Quiet conditions. Up, Down, OK, Reset, Mute
1.95W Max [without Strobe connected] 110 V AC 50-60Hz 24 V AC 50-60Hz Anti-
Surge 2.5A @ 250Vac
II 3 (Unit Only)
1A @ low voltage
Not formally evaluated. IP4X Determined by inspection. 0 ~ 50°C / 32 ~ 122°F
20 ~ 95% RH (non-condensing) -10 ~ 50°C / 14~122°F up to 95% RH (non-
condensing) 2000m
Min. 18AWG / 75°C min / Tinned copper.
IEC BS EN 61010-1 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. Information not
covered in this document, or if there is a requirement to send corrections,
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.
Issue 1
12
References
- American Gas Safety | Gas Detection | Control Systems | Solenoid Valves
- American Gas Safety | Gas Detection | Control Systems | Solenoid Valves