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Geo Cosy Installation Instructions Manual

Made by: Geo
Type: Installation Instructions
Category: Switch
Pages: 12
Size: 0.53 MB

 

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Hot Water Switch  

installation instructions

Please pass to your installer

 


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2

Important safety notice

 

j

The following safety regulations must be observed at all times. 

Failure to observe precautions could result in severe injury or death. 

 

This product must only be installed by a competent person.

 

h

  It is important to observe some simple safety precautions when installing and using this 

product. Read this important information before continuing. Safe operation of the unit is 

impaired if not used or installed in a manner specified by the manufacturer. 

 

r

  Isolate mains supply before removing the switch cover. When connected to a live mains 

supply, all internal parts are at mains potential. No user serviceable parts inside.

 

j

  For use in dry, indoor environments only.

 

n

  This product is double insulated.

 

l

  At the end of its life please recycle at a suitable recycling facility. Do not place in general 

waste.

 

m

 These units have been tested and conform to all relevant European safety and regulatory 

standards where applicable but not limited to the following: EN 60730-2-9:2010 with EN 

60730-1:2000 + A1:2004 + A12:2003 + A13:2004 + A14:2005 + A15:2007 + A16:2007 + 

A2:2008 (Excluding clauses: H.23, H.26 and Annex ZF); EN 60950-1:2005 (Second edition), 

Am 1:2009; EN 300-220-1; EN 301-489-1.

 


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3

Compatibility

Cosy is a mains powered wireless controlled thermostat that controls the heating and hot water. 

This guide refers to the installation of the switch that is used to control the hot water.

Compatibility with hot water systems:

  

 

Cosy only controls hot water on systems with a hot water tank. (i.e. not a combi boiler)

 

This version of Cosy can be used with a Y plan hot water system which uses a three-way valve 

or an S plan system using individual valves. (see diagrams)

MID-POSITION

VALVE

PUMP

FLOW

Y-PLAN SYSTEM

RETURN

BOILER

ZONE

VALVE

ZONE

VALVE

PUMP

FLOW

S-PLAN SYSTEM

RETURN

BOILER

 


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4

Step 1 – configure a switch for hot water

The Cosy switch can be used to control hot water. Using the jumpers inside the switch, it should be 

configured as below.  

S-Plan Hot Water

This is the default setting.

T1A
T1B
T1C

T2A
T2B
T2C

Y-Plan Hot Water

Remove T2C jumper.

T1A
T1B
T1C

T2A
T2B
T2C

 


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5

The hot water switch can be used to control the hot water in either a Y-Plan or S-Plan configuration.

The switch must be installed into the existing system in series with the hot water demand. In the 

case of Y-plan the switch should be configured as shown (page 4) as a changeover switch to ensure 

the three way valve operates correctly. 

 

T1 and T2 are both normally open switches. When the unit is configured as a Y-Plan switch, the 

system will recognise this and make T2 a normally closed switch.

Y-Plan Configuration

HTG ON

12:34

T2

T1

Boiler

Existing controls

H/W on

Cosy switch

Existing hot

water valves

 and tank

thermostat

H/W on

Constant live

H/W off

Constant live

250Vac supply

h

CAUTION!

MAINS VOLTAGE

T1A
T1B
T1C

T2A
T2B
T2C

T1
T2

MAINS

L

N

Step 2 – install the switch for hot water

 


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6

S-Plan Configuration

HTG ON

12:34

T1

Boiler

Existing controls

Cosy switch

Existing hot

water valves

 and tank

thermostat

h

CAUTION!

MAINS VOLTAGE

T1A
T1B
T1C

T2A
T2B
T2C

T1
T2

MAINS

L

N

H/W to

existing

System

H/W from

existing

System

250Vac supply

Step 2 – install the switch for hot water 

continued

 


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7

Step 3 – testing & handover

Please tick each box to show it has been carried out successfully

Testing Hot Water 

  Set the existing hot water controls to always on 

 

 

 

  Whilst the central heating is in Slumber, switch the hot water on from the Cosy app 

  Turn up the 

system hot water temp setting (normally on tank thermostat) - check boiler fires 

 

  On the Cosy display switch hot water off - check boiler stops 

 

  Return the 

system hot water setting to the original temperature 

 


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8

Cosy hot water is now installed and live

Installer: 

  

I have completed the install and tested the 

system as detailed in these instructions.

Signature:

Name: 

.................................................................

Company:

...........................................................

Contact details:

.................................................

Customer:

 

I am happy that the installer has completed 

the task as requested.

Signature:

Name:

.................................................................

Date:

....../....../......

 


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9

Troubleshooting

Is Cosy compatible with this hot water system?

Cosy support hot water in either Y-Plan or S-Plan configurations where a hot water tank is 

present. 

The LED on the switch is red - what is the problem?

The LED on the switch is red when:

•  The firmware on the switch is being updated by the hub. This is normally the case when the 

switch is first installed.

•  The switch has lost pairing with the hub. The switch comes pre-paired, which can occur if 

the middle button has been held for many seconds. Try and turn the switch power off and 

then on.

How do I re-pair the system?

The Cosy system comes pre-paired. To re-pair the system:

•  On the 

display, press and hold the bottom button (O) and then press the reset button on 

the base of the unit. Keep holding the 

O button until the display shows UNPAIRED DISPLAY.

•  Press and hold the link button (

f

) on the 

hub for 3 seconds - LED will be flashing amber.

•  On the 

display, press the top button (

d

) - the display will show the temperature (or 

SWITCH ERROR if the switch is also unpaired).

•  Press and hold middle button on the 

switch for 5 seconds - link LED (

f

) will flash red.

•  Press and hold the link button (

f

) on the 

hub again for 3 seconds - LED will be amber.

•  Once all the systems have properly paired, all link LEDs should be green and the display will 

be showing the current temperature.

 


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10

Troubleshooting 

continued

The display shows LINK ERROR

This happens when the switch or the display cannot communicate with the hub. This message 

might be shown when the system is first installed or during updates and will disappear once all 

components have been updated.

•  Move the display closer to the hub.
•  Check that there is nothing that could interfere with the wireless signal, such as large metal 

objects (e.g. flatscreen TV) or another wireless device.

The link icons (f) on the hub and switch are amber

This means that the wireless connection between the hub and the switch or the hub and the 

display has been lost. Try moving the display closer to the hub, moving the hub closer to the 

switch or rotate the hub to try and improve the signal to both the switch and the display.

 


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11

Manufacturer

This product was designed and manufactured by:

Green Energy Options Ltd., 

3 St. Mary’s Court, 

Hardwick, 

Cambridge, 

CB23 7QS, 

UK

Technical support

For technical queries relating to the installation, please call 

0845 643 5118.

Lines are open (UK hours):

 

8.30am to 6.00pm, Monday to Friday, excluding public holidays

 

8:30am to 12:30pm on Saturday mornings

 

$

Further advice can be found on the knowledge base: 

http://www.comehometocosy.com/support

 


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