HERON HT240 pro Instruction Manual

1
H E R O N E L E C T R I C C O M P A N Y L T D
User Guide and Installation Manual
HT240 pro - Two Wire Decoder Controller
Ti240-Basic
31/10/22
S:\Critical\Products\TwoWire\Manuals\Ti-Manuals\

2

3
Table of Contents
About the Controller 5
Installation 5
Mounting the Controller 5
Connecting Mains Supply 5
Installing Decoders 5
Pump / Master Valve Outputs 7
Cable Earth Points 7
More Inputs and Outputs 8
Start Input 8
Suspend Input 8
Flow Meter Input 8
Climatic Sensor Input 8
24VAC Permanent Output 8
Getting to know Your Controller 9
Resetting the Clock and Date 9
Set Up and Edit an Automatic Starts 10
Set Up and Edit Program Names 11
Set Up or Edit Program Information 12
Set Up and Edit Zone Information 14
a. Zone Configuration 14
b. Change Zone Name 14
c. View Zone Names 15
Pump Configuration 15
a. Pump Prime Time 15
b. Assign Pumps to Zones 16
Starting and Stopping 16
a. Program Start 16
b. Zone Start 17
c. Pump Start 17
d. Manual Stop 17
Short Cuts 18
a. Set All 18
b. Manual Advance 18
Log 19
Electrical Conformity 20

4
Changing Controller Options 20
a. Standard Configuration Options 21
1. Number of Zones 24
2. Number 24hr Starts 24
3. Number Weekly Starts 24
4. Skip Day Starts 25
6. Number of Programs 25
7. Rain Gauge 26
8. Manual Percentage 27
9. Input 1 Use 27
11. Auto Enable Option 27
13. Zone Info. 28
14. Config Program 28
15. Program Percentage 28
16. Use Names 29
17. Number of Cycling Starts 29
20. Parallel Programs 29
21. Parallel Manual Starts 30
28. Number of Flow Meters 30
29. Flow Test Enabled 31
30. Advance Lo Flow 31
31. Advance Hi Flow 31
32. Max Flow Faults 31
35. Week Auto Extra 32
40. Remote Start Prog 32
41. Remote Start Type 32
47. Group Percent 32
48. Back Up Prog 33
51. Display Current 33
52. Extra Info 33
58. Flow Log Rate x10S 33
b. Program Options 33
c. Reprogram General 34
d. Reprogram Programs 35

5
About the Controller
The HT240-Pro controllers are sequential irrigation controllers that operate 24V AC solenoid zones via
"decoders". Decoders are connected to the controller via a common two-wire cable.
Installation
WARNING Installation should be carried out by a qualified Electrician.
Mounting the Controller
The controller should be mounted on a wall using four screws, one screw through each corner lid bolt hole.
Warning: Additional holes should not be drilled through the controller casing.
Do not mount the controller in direct sunlight. Do not mount the controller where it can be exposed
temperatures above 40 degree C.
Mount the terminal box at the bottom of the controller and plug in the 5 Way lead the ribbon cable and the
Green Surge earth cable as shown below.
Connecting Mains Supply
IMPORTANT. Switch off the mains supply before connecting the controller.
Check that the mains supply voltage IS the SAME AS the VOLTAGE OF the CONTROLLER. The controller
voltage is displayed on the inside the controller casing. The mains supply should be fused with a 3 amp fuse
and be connected via a Residual Current Circuit Breaker as per any equipment used in damp conditions.
Connect the mains supply to the three terminals, Live to L, Neutral to N and Earth to E as shown in fig. 1
below.
Installing Decoders
Never expose decoders to direct sunlight or in locations where they be exposed to ambient temperatures of
more than 40 degree C. In warmer climates this will necessitate installing in zone box underground.
The solenoid output voltage is an Extra Low Safety Voltage. Keep solenoid cables and connections well
away mains voltages as per regulations for Extra Low Safety Voltages.
It is recommended that a two wire waterproof cable e.g. polythene cable or similar, is used to connect the
decoders. All cable joints must be sealed to minimise water ingress.

6

7
Pump / Master Valve Outputs
The controller has two Pump or Master Valves outputs on P1 and P2. Both outputs are current limited and
are designed to operate small 24V DC relays having a coil resistance of > 1K Ohms.
The outputs can also be used as Master Valve outputs. As the outputs P 1nd P2 are current limited you should
operate the solenoid valve using a relay as shown in fig.1.
Cable Earth Points
Cable earth points should be wired to the cable with earth rods as also shown in Fig 2. A minimum of 3 should
be installed for a looped cable and a minimum of 2 for a straight cable. Additional cable earth points should
be wired every 750m if necessary. Failure to wire these earth points will make the controller liable to surges
caused by lightning which may causes serious damage.

8
More Inputs and Outputs
Start Input
The Start Input is across "I2" and "C2". Joining these terminals will start program 1. The terminals have to be
connected for only a short period, 1 second, to activate the program. The contact must be broken before the
program will start again.
Suspend Input
The Suspend Input is across "I1" and "C2". Joining these inputs halts the irrigation programs. The programs
will continue once the short is removed.
This input may be connected to a float switch in the water reservoir so that the irrigation sequence is halted if
the water level is low.
The Suspend Input can be configured to be a stop rather than suspend input.
Flow Meter Input
A pulse type flow meter or paddle wheel flow meter can be connected to the flow meter input. A pulse type
flow meter connects across the F and G terminals.
Paddle Wheel flow meters are connected to F and G and are powered from the +V terminal. The +V terminal
provides +18VDC.
Climatic Sensor Input
The Climatic Sensor Input allows Heron sensors and the Heron weather station to be connected to the
HT240pro controller. Please see specific sensor manual for wiring instructions.
The Climatic Sensor Input also allows a simple rain switch (mini-click) to be connected to the HT240pro
controller. The simple rain switch is connected across the D and G terminals.
24VAC Permanent Output
A 24VAC permanent output is available across the terminals marked 24VAC. This output is to supply low
power 24VAC devices such as Heron interface cards and the Heron GSM module. This output is fused with
a F2 a 0.3A fuse.

9
Getting to know Your Controller
When you switch on the power the Main Menu will be displayed, as shown below.
Additional menu items may be displayed depending on how the configuration options on your controller have
been set. To scroll through Menu items press the “Arrow Up” and “Arrow Down” keys.
To select any menu item press the “OK/SELECT” key.
Repeatedly pressing MENU key will return you to the Main Menu.
If you press the MENU key on the Menu Screen, the Time Screen will be displayed, as shown below. The
Time Screen shows the zones that are currently running.
Resetting the Clock and Date
Use the “Arrow Down” key to scroll to the “CLOCK” item on the Main Menu. Select “CLOCK” from the Main
Menu.
The following screen will be displayed.
MAIN MENU
AUTO START
EDIT PROGRAM
ZONE INFO
PUMP CONFIG
LOG
13:05:41
TUE
ZONES OFF
--------------------------------------------------------------------
-------
SET CLOCK
TIME 13:08:50
DATE 5/04/22
COUNT 02 TUE
14 COUNT 02

10
Use the “Left” and “Right Arrow” keys to move the cursor over the time fields to change the time.
Press “Arrow Down” to move cursor over the date fields to change the date.
The day of the week will automatically change to the correct day for the date entered.
The ““Day Count”” reflects the day of the week that corresponds to the date entered. For example, if the date
entered is a Monday, then the ““Day Count”” will automatically change to 01. If the date entered is a Friday,
then the ““Day Count”” will change to 05.
The 14 “Day Count” reflects the day of the week over a two week period. When a date is entered or changed
then the 14 “Day Count” is reset to week 1 of the two week period. For example if the date entered is a
Wednesday, then the 14 “Day Count” will be automatically change to 03.
Press the MENU key to return to the Main Menu.
Set Up and Edit an Automatic Starts
Select “AUTO START” from the Main Menu.
The following screen will be displayed.
Initially your controller will be set to have a maximum of 6 automatic program starts per 24 hours. Your
controller can have up to 60 automatic starts. The number of automatic starts can be changed by setting the
controller’s Options. See section 15 “Changing Basic Configuration Options”.
The time is displayed in hours and minutes. A start time should be entered using 24 hour clock times.
Use the arrow keys to move the cursor over the program number. Use the number keys to enter the number
of the program to be started.
Use the arrow keys to move the cursor over the hours and minutes fields. Use the number keys to enter the
start time of the program.
An automatic start must be activated in order for it to work. Move the cursor over the “OFF” field and
press the “OK/Select” key. “OFF” will change to “ON”. The automatic start has now been activated.
When the cursor is moved away from the field the end time of the program will be calculated and displayed.
Press the MENU key to return to the Main Men
24HR START
TIME ACTIVE END
1 PROG 01 0:00 OFF ______
2 PROG 01 0:00 OFF ______
3 PROG 01 0:00 OFF ______
4 PROG 01 0:00 OFF ______
5 PROG 01 0:00 OFF ______
6 PROG 01 0:00 OFF ______

11
Set Up and Edit Program Names
Select “EDIT PROGRAMS” from the Main Menu. The Program Menu will be displayed.
Select “PROG NAME” from the Program Menu.
Program names default to “Prog 01”, “Prog 02” etc. Program names can be changed to a 10 character name
of your choice.
Select the program you want to rename and use the keyboard displayed to enter the name of the program.
Press the MENU key to return to the Program Menu.
PROGRAM NAMES
NAME
PROGRAM 1 PROG 01
PROGRAM 2 PROG 02
PROGRAM 3 PROG 03
PROGRAM 4 PROG 04

12
Set Up or Edit Program Information
Select “EDIT PROGRAMS” from the Main Menu. The Program Menu will be displayed.
Select EDIT PROGS from the Program Menu.
The default configuration option is for your controller to have only 1 program, however your controller can run
up to 28 irrigation programs. The number of programs your controller can operate can be changed by setting
your controller configuration options. See section 15 “Changing Standard Configuration Options”.
If your controller has been set up to run multiple programs then select the program you want to edit by
changing the program number.
The default is for programs to be in minutes and seconds. Once again, this can be changed to hours and
minutes through the controller configuration options.
Press “OK/SELECT” and the following screen will be displayed.
Use the arrow keys to move the cursor over the zone “minutes” and “seconds” fields. Use the number keys
to set the run time required for each zone in the program.
EDIT PROG
---------------------------------
ENTER PROG 1
--------------------------------------------
NAME Grass01
RUN TIME 00:22:00 ZONE TIME MINSECS
PROG 1 R001 C1-2
1 ZONE 01 VALVE 1 0:30
2 ZONE 03 VALVE 3 1:00
3 ZONE 05 VALVE 5 0:00
4 ZONE 07 VALVE 7 0:00
5 ZONE 09 VALVE 9 0:00
PROG 1 R001 C2-2
1 ZONE 02 VALVE 2 1:00
2 ZONE 04 VALVE 4 2:00
3 ZONE 06 VALVE 6 0:00
4 ZONE 08 VALVE 8 0:00
5 ZONE 10 VALVE 10 0:00

13
In the top right hand corner of the program screen the row number, sequence or column number and the
cursor position number are displayed, “C1-1”.
In example above the cursor is positioned on row 1 “R001”, in the first sequence or column of zones “C1”, on
the first editable field in the row. “-1”. Program 1 has been set up so that zone 01 will run for 30 seconds,
followed by zone 03 to run for 1 minute.
Moving the cursor with arrows keys changes the row number, sequence or column number and the cursor
position number displayed.
If the option to allow parallel running of zones within a program has been set then or column number will
change to “C2.
Zone 02 has been set to run for 1 minute in parallel with zone 1 and zone 04 to run for 2 minutes in parallel
with zone 03.
When program 1 is run the sequence of zones will be as follows:
Zone 01 and zone 02 will start together.
Zone 01 will run for 30 seconds, zone 02 will run for 1 minute.
Once zone 02 has completed its 1 minute run time, then zone 03 and zone 04 will start.
Row numbers are used to set a common value for a set of zones. - See section 12 “Short Cuts”.
Press the MENU key to return to the Main Menu.

14
Set Up and Edit Zone Information
a. Zone Configuration
Decoder Serial Numbers and zone properties need to be entered for each irrigation zone.
Select “ZONE INFO” from the Main Menu and the Zone Menu will be displayed.
Select “ZONE CONFIG” from the Zone Menu.
The decoder serial number is shown on the side of each decoder. Any decoder serial number can be
assigned to any zone. For example, if you want a decoder with serial number 012345 to be zone 1, enter
012345 in the serial number field for zone one on this screen.
Your controller can operate up to 100 zones on one card “2W1”. An additional card, “2W2”, has been added
to the controller to support more than 100 zones. If your controller has more than one card then the card
number associated with each zone should be entered.
If there is a flow meter connected to your controller, then the expected maximum and minimum flow rate in
litres/seconds can be entered for each zone.
Likewise, if more than one water meter is connected to your controller, then the meter associated with each
zone should be entered.
A delay in seconds between a zone stopping and the next one in the sequence starting can be set.
Zones can also be assigned to groups. Zones properties, such as adjusting zone run times by a given
percentage, can be applied to a group of zones.
b. Change Zone Name
Zone names can also be changed to a 10 character name of your choice.
To change a zone name, remain on the Zone Config screen.
Position the cursor over the zone number and press the ”OK/SELECT” key.
Use the on screen keypad to enter the name of your choice.
Press the MENU key to return to the Zone Config screen.
Press the MENU key to return to the Zone Menu.
ZONE CONFIG
ZN SN CD HIFL LOFL WM DELAY G
1 012345 2W1 0600 0000 0 0:00 1
2 000000 2W1 0600 0000 0 0:00 1
3 000000 2W1 0600 0000 0 0:00 1
4 000000 2W1 0600 0000 0 0:00 1
5 000000 2W1 0600 0000 0 0:00 1

15
c. View Zone Names
Select “ZONE INFO” from the Main Menu and the Zone Menu will be displayed.
Select “ZONE NAME” from the Zone Menu. The following screen will be displayed showing zone names.
Press the MENU key to return to the Zone Menu.
Pump Configuration
Select “PUMP CONFIG” from the Main Menu. The Pump Menu will be displayed.
a. Pump Prime Time
A pump prime pressurisation time can be set for each of the pumps connected to your controller.
Select “PUMP PRIME” from the Pump Menu.
Pump pressurisation times are set in minutes and seconds.
Position the cursor over the minutes and seconds fields. Use the number keys to set the pump pressurisation
time for each pump.
Press the MENU key to return to the Pump Menu screen.
ZONE NAME
ZN NAME SN CD
1 VALVE 1 012345 2W1
2 VALVE 2 000000 2W1
3 VALVE 3 000000 2W1
4 VALVE 4 000000 2W1
5 VALVE 5 000000 2W1
PUMP PRIME
1 PUMP 1 0:00
2 PUMP 2 0:00
3 PUMP 3 0:00
4 PUMP 4 0:00
5 PUMP 5 0:00

16
b. Assign Pumps to Zones
To assign a pump to a particular zone select “ZONE ASSIGN” from the Pump Menu.
To assign a pump to a particular zone, position the cursor over the relevant field and press the “OK/Select”
key. “NO” will change to “YES”.
Press the MENU key to return to the Pump Menu.
Note: “SPARE” option on the Pump Menu is not currently allocated to a function.
Press the MENU key to return to the Main Menu
Starting and Stopping
To manually start a program, a zone or a pump, press the START key to display the Start Menu
.
a. Program Start
Select “START PROG” from the Start Menu.
Enter the program number of the program you want to start and press the “OK/Select” key.
Press the Menu key to return to the Start Menu.
PUMP ASSIGN
PUMP P1 P2 P3 P4 P5
ZONE 01 YES NO NO NO NO
ZONE 02 YES NO NO NO NO
ZONE 03 YES NO NO NO NO
ZONE 04 YES NO NO NO NO
ZONE 05 YES NO NO NO NO
START PROG
---------------------------------
ENTER PROG 1
--------------------------------------------
NAME Grass01

17
b. Zone Start
Select “START ZONE” from the Start Menu.
Enter the zone number and the required run time. Press the “OK/Select” key.
Press the MENU key to return to the Start Menu.
c. Pump Start
Select “START PUMP” from the Start Menu.
Enter the pump number and the time you want to run the pump for in hours, minutes and seconds. Press the
“OK/Select” key.
Press the MENU key to return to the Start Menu.
d. Manual Stop
Pressing the “STOP” key will result in immediately stopping any pump, zone or program which is running at
that time.
START ZONE
---------------------------------
ZONE NUMBER 1
TIME 0:00:00
--------------------------------------------
MANUAL PUMP
---------------------------------
PUMP NUMBER 1
TIME 0:00:00
--------------------------------------------

18
Short Cuts
a. Set All
When setting up an irrigation program, the “Set All/Auto Disable” key allows a quick method of setting a
number of zones to run for the same length of time.
Go to the program set up screen where zone times are entered.
To set a group of zones to the same run time, press “Set All”.
Enter the range of zones to be set to the same run time.
The zone range is specified in terms of the row number of a zone in the irrigation program. The row number
of a zone is displayed in the top right hand corner of the program screen when the cursor is positioned on that
zone.
Enter the run time in minutes and seconds for the range of zones selected.
Press the MENU or “Set All” key to return the program editing screen.
b. Manual Advance
When an irrigation program is running, press the “Arrow Right” key to move onto the next zone in the
sequence. This can be useful when testing your system.
PROG 1 R001 C1-2
1 ZONE 01 VALVE 1 0:00
2 ZONE 02 VALVE 2 0:00
3 ZONE 03 VALVE 3 0:00
4 ZONE 04 VALVE 4 0:00
5 ZONE 05 VALVE 5 0:00
SET ALL
---------------------------------
FROM ROW 001 to 001
RUN TIME TO 0:00
--------------------------------------------

19
Log
All controller events and faults are recorded and can be viewed in the “Event Log”, “Zone Log” or “Fault
Log”.
Select “LOG” from the Main Menu. The Log Menu will be displayed.
Select the log you want to view.
Any faults which have occurred can be viewed on the “Fault Log”.
The “Zone Log” displays the events for the last 30 zones which have run.
The “Event Log” displays all the events that have occurred.
If a fault has occurred then one of the following codes will be displayed.
Controller
Displays
Message
Fault
Controller
Response
Action
O/L1
OL1 with Zone
Number
Too much current is
flowing to operate
the decoder.
All irrigation
programs will be
immediately stopped
Check Cable
O/L2
OL2 with cable
number
Short on two wire
cable. More than
1.6A being drawn
All irrigation
programs will be
immediately stopped
Check Cable
Deco
Zone Number with
Deco
No
acknowledgement
from decoder when
switching on
Current and
subsequent irrigation
programs will
continue as normal.
Find the decoder with the ‘zone reference
number’. Check decoder serial number is
correct. Check decoder is connected and
is connected the correct way round.
Finally try the decoder locally at the
controller.
Taking Care of Your Controller
Never - use sharp objects to press the keys on your controller. Avoid pressing the keys with your
fingernails.
Always - ensure the lid screws are screwed down tightly to keep the inside of the controller dry and
to reduce exposure to high humidity.

20
Electrical Conformity
USA This product has been certified as an FCC Class B device.
Declaration of Conformity
We herewith declare that all products manufactured by the company below meet the requirements of EC
directives.
Applied Standards Are:
EN 50081-1 EMC Generic Emission
EN 50082-2 EMC Generic Immunity
To comply the product must be permanently installed in accordance with the installation instructions
provided and the electrical supply must be sinusoidal.
Heron Electric Co Ltd,
Unit G15 Rudford Industrial Estate, Arundel, England
Changing Controller Options
This section describes the basic configuration options you can set on your controller. Your controller has 13
basic configuration options. If you need to use the more advanced features of the controller please refer to
the ‘Advanced Options’ manual.
WARNING
Do not adjust Advanced Configuration Options without referring to the “Advanced
Options” manual.
Keep a record of any options values before and after a change.
Always fully test any new configuration values after you have changed them to
ensure the controller functions as you require.
Your Installer may have already set your installer or dealer may have already set
your controller to the required values.
To access the controller’s basic configuration select OPTIONS from the Main Menu.