EPH Controls IMC Operating instructions

Installation and Operation Guide
Immersion Controller
IMC

Installation Instructions
3
Specications
2
Factory Default Settings
5
Mounting & Installation
7
Installation Drawing
Operating Instructions
Table of contents
4
LCD Symbol / Button Description
8
Wiring
18
Keypad Lock Function
19
Menu Function
11
Setting the date & time and programming mode
12
13
15
14
19
P01 - Backlight Function
20
P02 - Backlight Function
21
23
P03 - PIN lock
P05 - Reset Function
Programming Modes
Programming Timed Mode
Factory Program Settings
Operating Switch

Installation Instructions

2IMC
RFRP-OT Room Thermostat
Factory Default Settings
Clock: 24 hour
Daylight saving: On
Backlight: Auto
Keypad lock: O
PIN lock: O
Programming mode: 24H

3
Immersion Controller
Specications
Power supply: 230Vac 50-60Hz
Power consumption: 10mA
Ambient temperature: 0…45°C
Admissible ambient humidity: 5-95%RH
Dimensions: 170 x 116 x 63 mm
Contact rating: 13A / 250Vac
Program memory backup: Internal
Battery: LIR 2032
Backlight : White
IP rating: IP20
Pollution degree: Pollution Degree 2
Rated impulse voltage: Resistance to voltage surge 2KV
as per EN60730
Automatic action: Type 1C

4IMC
LCD Symbol / Button Description
Button
Description
LCD Display Current day of the week
Time
Holiday Mode
is enabled
Timed Mode
is enabled
Boost Mode
is active
Holiday
end date
Keypad Lock (Solid)
PIN Lock (Flashing)
Date / Program setting
Operating
Switch
Boost
Button
Menu
Button
Program Button Time / Date Button
Input Buttons
Timed Mode
Indicator
Boost Mode
Indicator

5
Immersion Controller
The IMC is supplied with its own surface mounting box, which can be mounted over
a single or double gang ush wall box. It should not be mounted on an unearthed
metal surface.
An immersion heater must have its own radial circuit.
This should be protected by a 16 Amp RCBO.
Mounting & Installation
Caution!
Installation and connection should only be carried out by a qualied person.
Only qualied electricians or authorised service sta are permitted to open the controller.
If the controller is used in a way not specied by the manufacturer, its safety may be impaired.
Prior to setting the controller, it is necessary to complete all required settings described in the section.
Do not use sharp tools to push any button
WARNING! Isolate mains supply before commencing installation and ensure the unit is properly earthed

6IMC
1) Loosen the 2 screws on the front housing of the controller.
2) Remove the appropriate break-outs before xing the surface mounting box.
3) Secure the back housing with xing screws as shown.
Wire the controller as per wiring diagram on page 8.
4) Replace the front housing and tighten the 2 screws.
Note
Use a cable with a minimum conductor size of 1.5mm2for a 3kW heater to connect the element(s)
to the IMC controller.
When wiring is complete ensure that all terminal screws, including the earth terminal screws are
securely tightened.
Clamp all surface wiring adjacent to the back housing of the controller or use trunking where
appropriate.
Secure the heat resistant exible cords from the immersion heater using the cable clamp on the
back housing.
Mounting & Installation (Continued)

7
Immersion Controller
Installation Drawing
3 4
1 2
45
169.50 58
115.50

8IMC
Terminal Connections
Terminal 1 Live In
Terminal 2 Neutral In
Terminal 3 Neutral Out
Terminal 4 Boost Load
Terminal 5 Timed / O Peak Load
Timed
/ O
Peak
Load
Boost
Load N
Out N In L In
N
Mains Supply
L
Wiring
Caution!
Mains voltage output only

9
Immersion Controller
Single Element Immersion Heaters
1) Connect the Neutral to Terminal 3.
2) Connect the Earth to the Earth terminals.
3) Connect the Live to both Terminal 4 and Terminal 5.
Dual Element Immersion Heaters
1) The heaters should be controlled through separate thermostats. In practice
the thermostat for the top (short) element is usually set 5 – 10 °C less than the
thermostat for the (long) O Peak element.
2) Connect the Neutral to Terminal 3.
3) Connect the Earth to the Earth terminals.
4) Connect the short element (Boost Load) to Terminal 4.
5) Connect the long element (Timed/O Peak Load) to Terminal 5.
Note:
The 3 core exible cable from the immersion heater to the IMC controller should be heat resistant
and rated to 85˚C.

Operating Instructions

11
Immersion Controller
Press once, the year will begin ashing.
Press or to select the year. Press .
Press or to select the month. Press .
Press or to select the day. Press .
Press or to select the hour. Press .
Press or to select the minute. Press .
Press or to adjust from 24H to 5/2 day
or 7 day. Press .
Press or to turn DST (daylight savings time) On or O.
Press or wait 30 seconds to return to normal operation.
Setting the date, time and programming mode

12 IMC
Operating Switch
This function allows you to change the operating mode of the controller.
There are two selections‘OFF’and ‘Timed’.
Setting Controller to OFF
Use the Operating Switch to set the controller to OFF.
The controller will not operate when the switch is set to OFF.
Setting Controller to TIMED
Use the Operating Switch to set the controller to TIMED.
The controller will switch on and o based on the time programs set by the user in
the PROG mode. (Factory settings on page 14)
Setting Controller to BOOST
Note: Boost is only possible when the operating switch is set to TIMED
Press the once for 30 minutes, twice for 1 hour, three times for 2 hours, four
times for 3 hours. Press to conrm BOOST time required.
The controller will activate for the selected period and then revert to its previous
timed program.

13
Immersion Controller
The IMC Controller has the following the following programming modes available:
24 Hour mode Programming all 7 days as one block with the same times.
5/2 Day mode Programing Monday to Friday as one block and
Saturday and Sunday as a 2nd block.
There are 3 On and O times per day possible.
7 Day mode Programming all 7 days individually with dierent times.
Programming Modes
If 7 D mode is selected, you can program each day of the week with 3 On and O
times.
If 24H mode is selected, you can only program each day of the week with the same 3
On and O times.

14 IMC
Factory Program Setting 24H
5/2 Day
P1 ON P1 OFF P2 ON P2 OFF P3 ON P3 OFF
Mon-Fri 02:15 07:15 12:00 12:00 18:00 18:00
Sat-Sun 02:15 07:15 12:00 12:00 18:00 18:00
24 Hour
P1 ON P1 OFF P2 ON P2 OFF P3 ON P3 OFF
Everyday 02:15 07:15 12:00 12:00 18:00 18:00
7 DAY
P1 ON P1 OFF P2 ON P2 OFF P3 ON P3 OFF
Each day individually 02:15 07:15 12:00 12:00 18:00 18:00

15
Immersion Controller
Adjusting the program settings in 24H Mode
There are three On/O times per day possible, represented by P1, P2 and P3.
Press the once.
The day(s) of the week being programmed will appear at the top of the screen, the
dierent modes (5/2 d, 7 d & 24 hr) can be chosen in the TIME menu (see page 11)
Press or to adjust the P1 ON time. Press .
Press or to adjust the P1 OFF time. Press .
Press or to adjust the P2 ON time. Press .
Press or to adjust the P2 OFF time. Press .
Press or to adjust the P3 ON time. Press .
Press or to adjust the P3 OFF time. Press .
Press or wait 30 seconds to return to normal operation.
Programming Timed Mode

16 IMC
Programming Timed Mode (Continued)
Adjusting the program settings in 5/2D Mode
Press the once.
MON – FRI will appear at the top of the screen.
Press or to adjust the P1 ON time. Press .
Press or to adjust the P1 OFF time. Press .
Repeat this process for P2 and P3 On / O times.
SAT – SUN will appear at the top of the screen.
Repeat this process for the Saturday and Sunday programs
Press or wait 30 seconds to return to normal operation.

17
Immersion Controller
Adjusting the program settings in 7D Mode
Press the once.
MON will appear at the top of the screen.
Press or to adjust the P1 ON time. Press .
Press or to adjust the P1 OFF time. Press .
Repeat this process for P2 and P3 On / O times.
TUE will appear on the screen, repeat this process for the remaining days of the week.
Press or wait 30 seconds to return to normal operation.

18 IMC
Keypad Lock Function Unlocked
The Keypad Lock function allows the user to prevent changes being made by
disabling the buttons.
Locking the keypad
To lock the keypad, press and hold both the and together for 10 seconds.
will appear on the screen. Keypad is now locked.
Unlocking the keypad
To unlock the keypad, press and hold both the and together for 10
seconds.
will disappear from the screen. Keypad is now unlocked.
Note: The user can still use the operating switch to change between TIMED and OFF modes even
when the keypad is locked.