The Chop Cloc Should only be Fitted by a Qualified Electrican.
There are three basic ways to fit the Chop Clock
1: System Boiler Installation
2: Combi Boiler Installation
3: Installation near a thermostat
Chop Cloc System Boiler Installation
Establish the position of the main wiring centre and turn off the mains power supply to the system.
Open the wiring centre and establish the position of the main inputs and outputs. (The boiler control wiring, the main power supply, the thermostat control wiring where fitted and the main timer input)
Watch Chop Cloc Installation Video
Remove the back plate on the chop cloc by inserting a screw driver in the top slot.
There is a cable way to accommodate another two twin cables or a five chord cable as conventionally used in heating wiring.
If the unit is to be surface mounted remove the blanking plate from the cable way.
Install the cables in the cable way and mount the unit. The connectors for power supply are 1 and 3. 1 is live and 3 is neutral.
The connectors for control are 2 and 4. 2 is output and 4 is incoming.
For the control wire you need to interrupt the connection coming out from the main timer.
First wire in the power supply live and neutral.
Then remove the incoming timer power output and use a connector block to connect the input wire to chop cloc.
Complete the circuit back in at the point you disconnected the timer output.
Chop Cloc’s main body can then be replaced onto the backplate and the wiring centre also replaced.
Connect the mains supply through any nearby switched fuse.
Power can then be restored.
Chop Cloc Combi Boiler Installation
Chop Cloc is connected as if it were an external control.
Extablish the position of the external control connector block within the boiler wiring.
Remove the linkage and connect chop cloc between ouput and input across that.
Mains wiring is connected as normal.
Chop Cloc Installation Near a Thermostat
Establish the common connector going into the thermostat and use a connector block to connect choc clocs input to the main system
Output at that point and return the output from Chop Cloc into the thermostat.
If the thermostat is also a programmable timer this can be reversed and chop cloc wired downstream from the normally open connection.
A nearby mains supply has to be sourced and choc cloc connected in a conventional manner.
Connect live and neutral across that switched fuse. When all connections are secure mains power can be switched back on.