CodaOctopus Martech Watchdog2 User manual

Test, Measurement and Control Solutions for Demanding Applications
Coda Octopus Martech Limited
17 Mereside, Osprey Quay, Portland, Dorset DT5 1PY, UK.
t: [phone] f: 07092 870664 [e-mail], www.martechsystems.co.uk
Company No. 02300406, VAT No. 510892555
A Coda Octopus Company, Headquartered in USA
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Watchdog2 Fire Sprinkler Controller Installation Guide
This document provides essential information on how to install, configure and test the Watchdog2
The good news is the Watchdog2 is easy to install and requires minimum set up and configuration.
Key features:
Input connections for:
•Dual pressure switch (monitored)
•Flow switch (monitored)
•Water level
Output connections for:
•Pump
•Diverter valve
•Fire panel
•Fault monitor
•Low water alarm
USB connection for:
•Uploading of advanced configuration files
•Software updates
Watchdog2 has been designed with failsafe features
that help ensure that the pump will run when the
pressure drops (in the event of a sprinkler head
opening) even if the microprocessor or software fails.
WARNING –Watchdog2 is a safety critical device and
MUST be installed by a qualified electrician/electrical
engineer in accordance with relevant electrical
installation regulations and relevant fire sprinkler
regulations.
Failure to install and configure correctly may result in
the fire sprinkler system failing to operate, resulting
in loss of life or severe injury. Coda Octopus Martech
Ltd. (Martech) accepts no responsibility for failure of
any kind resulting from incorrect installation or from
installation by unqualified installers.
For additional resources and technical support, please visit www.firesprinklerwatchdog.com or
scan the QRcode:

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SUGGESTED* SYSTEM CONFIGURATION
Important Note*
The above is illustrative ONLY and it is the responsibility of the installer to ensure compliance with all
relevant and current standards relating to Fire Sprinkler systems, including but not limited to regulations
for electrical installations, water supplies, plumbing and pipework.
Martech accepts no responsibility for non-compliance with the standards relating to the installation and
choice of components.
Pressure Switches
Pressure switches are required to be closed at pressure, opening on low pressure, and must be set correctly.
For optimum pressure switch settings, please refer to pump manufacturer’s advice, and configure in
accordance with the latest BS standard for Fire Sprinkler systems.
.
Flow Switch
Flow switch is required to be closed at zero flow, opening when flow is detected.
Pump
Watchdog2 is compatible with most commercially available single-phase pumps up to 3kW (13A at 240Vac),
and is fused to 15A (T) as standard. Martech recommends Grundfos pumps.
Diverter Valve
Watchdog2 has a change-over relay for use with a diverter valve (max 5A at 240Vac), and is fused to
0.5A/500mA (T) as standard
Pumps with integral pressure switches and other advanced features should not be used unless these
features are disabled. Use of these types of pumps may cause problems during use including false alarms
or failure to operate in the event of fire.
OPTIONAL FEATURES –POWER LOSS ALARM
On boards where J35 is fitted (bottom RH corner), an optional rechargeable NimH battery (not supplied as
standard) can be fitted to provide an audible alarm every 10 minutes in the event of a power failure. This
battery is not used to maintain the main on-board clock, and will not run the pump in the event of a fire.
Battery type. RS 1769373 https://uk.rs-online.com/web/p/rechargeable-battery-packs/1769373
water return pipe for testing
Non-return
valve
Pump
Pressure
Switch x 2
Flow Switch
Diverter
Valve
Water Tank
Level switch
Sprinkler
Heads
Pressure
Gauge

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LED FUNCTIONS
LED
Function
PUMP (yellow)
ON = pump running
FAULT (red)
The LED stays on for 10 seconds then flashes according to the fault. At the last flash the LED stays on
for 10 seconds before the sequence is repeated (see below example for 3 flashes).
2 flashes - Auto_Test_Failure
3 flashes - Low_Water
4 flashes - Pressure_Switch1_Failure
5 flashes - Pressure_Switch2_Failure
6 flashes - Excessive_Operation
7 flashes - Phase_Failure
8 flashes - Maximum_Run_time
9 flashes - Solenoid_Valve_Failure
10 flashes - Possible Fire (no flow detected)
FIRE! (red)
Flash 2Hz (0.5 secs) = Fire mode
SERVICE (blue)
Flash 1Hz (1 sec) = Service required
TESTING (orange)
Flash every 2 seconds = Dump Valve open
ON = Remainder of auto test in progress OR
ON = Wait period after operation (e.g., after jockey mode)
Also
ON when a USB stick is inserted and read/write is in progress (sounder sounds when read/write is
complete)
POWER (green)
Mains power available
BUTTON FUNCTIONS
Function
Button Press
Action
Run pump
TEST button, short press (>1<2 secs)
Runs pump for 20 seconds (no dump valve operation)
Logs time and date to USB stick
Run periodic Automatic
test.
TEST button >5 secs
Run full test with dump valve etc.
See periodic automatic test below
Reset periodic test
time.
RESET button > 10 secs (beep)
Followed immediately by
TEST button >5 secs (beep)
Resets periodic test time (time of day when auto test will
run). The frequency of the test (e.g., every 7 days) is
configured in the USB settings file
Silence sounder
RESET button, short press (>1 <2 secs)
Silences sounder until next weekly test
Stop pump
RESET button >5 secs when in fire mode
Stops pump, but only after initial 30 secs operation.
Will resume if pressure not restored or flow is present.
Clear faults
Resets annual service
RESET button >10 secs
Repeat immediately/keep held for
further 10secs
Clears faults
Resets annual service
PERIODIC AUTOMATIC TEST SEQUENCE (ALSO KNOW AS WEEKLY SELF-TEST)
Periodic Automatic
Test
Refer to Button
Functions above to
reset the time of day
to run the test
Runs periodic test
according to time
period in settings
file.
e.g., weekly.
(default = 7 days)
1. Open dump valve, FLASH TESTING LED
2. Wait for pressure drop
3. Confirm both pressure sensors detect pressure drop (times out after
defined autotest period fault)
4. Close dump valve as soon as pressures switches activated
5. Run pump (PUMP LED ON)
6. TESTING LED to ON
7. Confirm both pressure sensors reinstated/closed
8. Run on for X secs after pressure reinstated (jockey run period)
9. If any faults, set fault o/p
10. TESTING LED OFF
ON 10
secs
ON 10
secs
ON 10
secs
Flash1 2 3

Flash1 2 3


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ELECTRICAL CONNECTIONS
The following diagram shows the main connections used in a
standard Fire Sprinkler installation SEE BELOW FOR FURTHER DETAIL OF INPUT CONNECTIONS
CURRENT RATING AND FUSING: F1 - PCB control electronics 500mA(T)
F3 - PUMP max 13A* at 230Vac Factory fitted with fuse 15A*(T) F4 - VALVE (DO5), max 5A at 230Vac Factory fitted with fuse 500mA(T)
DO NOT EXCEED MAXIMUM CURRENT
*Max running current. Where peak start-up current exceeds 15A, causing fuse to blow, fuse up to 20A(T) may be
fitted.
WARNING
240Vac
PRESENT!
MAINS INPUT
N E L, 240Vac, 15A
PUMP
N E L, 240Vac, 13A max
VALVE, 240Vac, 5A
Neutral Earth LNC = L, Valve Close LNO = L, Valve Open
PRESSURE SW1
Com-NC contact OPENS
on low pressure, closed
on High pressure
PRESSURE SW2
As per P SW1
FLOW SW, see note
WATER LEVEL
Com-NC contact opens
on low water
FIRE ALARM Com-NO
Contact closes when in Fire Mode
FAULT Com-NC
Contact open when no fault closes
when fault detected or power failure
LOW WATER ALARM Com-NO
Contact closes when Low Water
detected
INPUTS, 12Vdc on
COM terminal 
OUTPUTS, Volt free change-
over contacts, max 5A 
F3
F1
F4
USB
PCB viewed when lid folded downwards for installation. Some circuit
boards (PCB) may have additional components or connectors fitted, which are not used. FLOW SWITCH can be wired NC-COM where the flow switch opens on flow (closed when no flow is present).
Flow Switch Can also be wired NO-COM where the flow switch closes on flow. In this configuration, the COM-NC contacts must also be linked.

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SENSOR WIRING DETAIL
NOTE for correct operation and compliance with BS9251-2021, dual pressure sensors and a flow switch
must be fitted. ALL sensors are CLOSED during normal operation (high pressure, zero flow, water high) and
open when these conditions change (e.g. in the event of a sprinkler opening). WD2 does however also
support other flow switches which close on flow only, shown below in red. In this configuration, the NC-
COM contacts MUST be linked.
If a low water sensor is not required the input MUST be linked across to prevent alarms.
BACK-UP BATTERY ENABLING
Battery Link (J26) has been fitted as shown, to isolate
the battery and prevent the battery running down
when in storage.
Before installing, move battery link (J26) as shown to
the 2 pins furthest from the battery.
This is essential to ensure that the clock is
maintained when no power is applied.
The battery is rechargeable and requires the unit
to be power on for >24hours to achieve a full
charge.
The battery ONLY maintains the clock and does
not allow operation.
ENABLE
BATTERY
ISOLATE
BATTERY
Pressure switch, closed at pressure
Opens on pressure drop
Pressure switch, closed at pressure
Opens on pressure drop
Level switch, closed at high water
Opens on low water
Pressure 1
Pressure 2
Flow
Low Water
INPUTS, 12Vdc on COM
terminal
FLOW, NC-COM
Opens on flow
ALT FLOW, NO-COM
Closes on flow

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SETTINGS AND CONFIGURATION
Watchdog2 is factory-configured with standard settings that should be suitable for most installations.
Where required, these settings can be changed. See below for instructions on downloading advanced
settings from a USB memory stick.
Settings file can also be configured and downloaded using our ON-LINE TOOL at
www.firesprinklerwatchdog.com, or using the QR code
Using a USB stick to configure settings
Settings can be edited on any PC/Laptop and uploaded to the Watchdog2 from a USB memory stick. The
USB connector is internal as shown on the electrical connection diagram. The settings text file is named
settings.txt and can be edited in Windows Notepad. The file must be a plain text file format. The text file
must be saved to a memory stick in the root/top level (not in a sub-folder). When a Settings file is detected
on the USB stick, all LEDS flash to indicate new settings being uploaded. After uploading, the system will
beep and the LEDS will stop flashing. The settings text file on the USB stick is also renamed to avoid
inadvertent re-use.
The below is an example of the recommended default settings text file (settings.txt) that is pre-installed.
Current Time:-11:30; enter the time here, WD2 will update to this when USB inserted
Current Date:-16/02/2023; enter date here, WD2 will update to this when USB inserted
Service Reminder:-ON; ON or OFF, sets whether service reminder is active
Service Interval:-12; 1-12 Months, period for service reminder
Low Water Delay:-10; 0 to 60 Seconds, delay for low water detection
Maximum Run:-OFF; DISABLED ON WD2
Maximum Run Time:-480; 1 to 480 Minutes DISABLED ON WD2
Excessive Operation Limit:-7; 0 to 30 Starts/week, jockey runs allowed, 0=off
Jockey Pump Duration:-20; 5 to 120 Seconds, length of time pump runs for Jockey run
Flow Switch Delay:-3; 0 to 25 Seconds, trigger delay for flow switch
Pressure Switch Delay:-3; 0 to 10 Seconds, trigger delay for Pressure switch
Fire Mode Wait:-5; 1 to 30 Seconds, delay before triggering fire mode
Device Name:-INSTALLATION INFO insert installation info here such as location
INSTALLATION INFO insert installation info here such as location
INSTALLATION INFO; three lines each less than 21 characters inc spaces
Installer Name:-INSTALLER NAME insert YOUR company name/details
INSTALLER NAME insert YOUR company name/details
INSTALLER NAME; three lines each less than 21 characters
Installer Contact details:-CONTACT DETAILS insert YOUR company contact info
CONTACT DETAILS insert YOUR company contact info
CONTACT DETAILS; three lines each less than 21 characters
Auto test Duration:-300;60 to 600, Seconds, max time for autotest, timeout = fault
Auto test Open:-15; 1 to 90 Seconds, auto test dump valve open duration
Auto test Period:-7; 1 to 30 Days, frequency of autotest
Cooling line Duration:-3; 0 to 60 Seconds, DISABLED ON WD2
Cooling line Cycles:-30; 1 to 60 times/hour, DISABLED ON WD2
Model Variant:-0; 0=watchdog LOCKED on WD2
Timer override:-0; 0-60 minutes, set to zero normal for operation
Text in green is for information only and not part of the file
IMPORTANT! After uploading new settings files, always POWER CYCLE the WD2, wait 1 min THEN remove
& re-insert the USB stick to download the new settings file and check that they have correctly uploaded.
NOTE - IF IN DOUBT, ALWAYS DOWNLOAD THE STANDARD SETTINGS FILE FROM
www.firesprinklerwatchdog.com.
All text after the semi-colon (;) are comments only and are not used by the system.

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Time and date sets an approximate time/date on the Watchdog2 for time stamping of activity logs. The
time entered will be taken as the correct time when the file is read by the Watchdog2 from the USB stick.
Attempting to change features shown as disabled or locked will have no effect and will not be used.
A time & date only settings file can also be downloaded from www.firesprinklerwatchdog.com which allows
changing of the time and date without affecting the other settings.
DIAGNOSTIC MODE
With the unit powered OFF, move link J23 in the position 2 (viewed with the front panel folded down) as
shown, the system will power up into an engineering diagnostics mode. In this mode it
WILL NOT operate as a fire sprinkler controller, but will illuminate LEDs only in response to certain inputs.
will allow manual operation of the pump and valve. This is intended to assist the engineer to manually check
inputs during installation.
NOTE it is critical that J23 is reverted to the normal operating position (position 1) after diagnostics, to
ensure correct Fire Sprinkler operation.
TEST MODE
Test Mode Function
TEST Button
Press and hold to run pump, release to stop pump
SERVICE Button
Press and hold to open valve, release to close valve - pressure will drop.
PUMP LED (yellow)
ON, Valve opening
Flashing 1 per second, Pump running
Flashing 5 per second, Valve opening and pump running
FAULT LED (red)
Pressure switch 1 (D11), on when active/low pressure/ open circuit
ALARM LED (red)
Pressure switch 2 (D12), on when active/ low pressure/ open circuit
SERVICE LED (blue)
Flow switch (D13), on when active/ flow detected/ closed circuit
TESTING LED (orange)
Water level (D14), on when active/water low/closed circuit
POWER LED (green)
Mains power available
Test mode LED functions are shown in red:
2 1
NORMAL DIAGNOSTIC

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INSTALLATION CHECK LIST
The following is a suggested checklist to help ensure that you have carried out key actions when installing the
Watchdog2.
NOTE - This check list is not exhaustive and it is the installers responsibility to ensure that the installation is working
correctly and complies with all regulatory requirements.
Description
Checked By
Date
1
Battery Link correctly fitted to ENABLE back up battery?
2
Diagnostic Mode Link returned to POSITION 1?
3
Settings file updated including correct time? (optional)
4
Copy of updated configuration downloaded from WD2 and checked against
expected settings? (Recommended to be retained for your records)
5
Pressure in system manually dropped and correct operation confirmed?
6
Flow manually created and flow switch activated and correct operation
confirmed?
7
Low water alarm operation checked?
8
Fault o/p operation checked?
9
Faults/alarms created during installation have been cleared?
10
Automatic Test time set?
11
Automatic Test manually started and correct operation confirmed?
12
Pressure reinstated after tests completed?
13
USB stick removed?
14
Front panel securely attached to the box?
15
Repeat items 11 & 12 after refitting lid, confirm correct operation and pressure
reinstated?
16
Customer provided with installer details for future reference?
INSTALLATION RECORD
Customer
Location
Installed by
(Company)
Installation
Engineer
(name)
Phone No.
Email and
Website
System
Pressure
Bar
Installation
date