Honeywell evohome Installation Manual page 6

Upgrade application 3: Combi
boiler with domestic hot water
The application Combi boiler can be
upgraded to control domestic hot water as
an S plan or Y plan system by installing the
relay modules for both hot water and heating
control and additionally the hot water sensor
CS92A.
However, the configured BDR91 boiler relay
must be disconnected from the evotouch to
be used as hot water relay or heating relay.
The following steps must be done to
upgrade the Combi boiler application into a
S plan or Y plan application
1. Uninstall pre-configured BDR91
boiler relay
• Press the evotouch MENU button for
approx. 10 seconds.
• Go to menu EDIT SYSTEM CONFIG.
• Select BOILER DEMAND.
• Press the button NONE.
• Reset BDR91 boiler relay.
Note: Press and hold the test button of the
BDR91 boiler relay for 15 seconds until
the red LED flashes 0.9s off / 0.1s on. This
ensures that the configuration information
held in the BDR91 boiler relay is removed.
The BDR91 boiler relay is now uninstalled
and can be configured as hot water relay or
heating relay.
6
2. Configure S plan or Y plan
system
• Press the evotouch MENU button for
approx. 10 seconds.
• Go to menu EDIT SYSTEM CONFIG.
• Select HOT WATER DEMAND.
• Select option HOT WATER DEMAND.
• Bind the hot water sensor CS92A to
evotouch.
• Bind the BDR91 hot water relay.
• Bind the BDR91 heating relay.
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