11
MID-POSITION
VALVE
PUMP
FLOW
Y-plan
RETURN
BOILER
ZONE
VALVE
ZONE
VALVE
PUMP
FLOWRETURN
BOILER
S-plan
Installing the Hot Water switch
If you have a hot water tank with a Y or S plan
system (see right) Cosy can also be used to
control your hot water. To control the hot water
please purchase a hot water extension pack.
The switch is a mains powered switch and
requires a competent electrician to install it and
takes 15-45 minutes to install and test.
If you have bought Cosy with installation an
installer will contact you and arrange a time and
date to come and install your switch, test the
system and make sure you are entirely happy
with your Cosy.
If you have bought Cosy without installation you
will need to arrange an installation yourself.
Go to www.comehometocosy.com/support
where you will be able to download the Hot
Water Switch Installation Instructions.
When the installer/electrician arrives give
them the Cosy Hot Water switch installation
instructions, the Cosy switch box and show
them your hot water system.
Once the electrician has installed the switch
they should test the system to check that your
heating and hot water are up and running.
For the system to work properly you need to
check two things:
• The switch is active (the centre button is
green when switched on)
• Your existing controller is set to constant
hot water (if you have one)
3 port valve
2 port valve
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