Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual page 39

B) Retro installations operate the Ecogen with a new or existing external system wiring centre. This means that the installer has the option to retain an existing room thermostat,
DHW thermostat and programmer. An outdoor sensor for weather compensation cannot be used in this case. The THINK Controller must remain on the appliance (See Section
10.11).
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10.3 Complete Wiring Configuration
1. All wiring external to the appliance must be in accordance with I.E.E. BS 7671 ­ requirements for Electrical Installations.
IMPORTANT: Before running the appliance ensure parameter 5700 has been set according to the type of system installed.
See sections 10.4 to 10.11 for system types and section 11.3.k for the change procedure.
* NOTE: All Fuses 3.15 ** Permanent Live once the 230V supply is connected
A
*** Ensure all system wiring is correct to wiring regulations (BS7671) and fully tested before connection to avoid any damage to the appliance
controls.
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10.4 Y­Plan with DHW cylinder sensor
1. The appliance MUST have a permanent Live/Neutral/Earth connection. The pump must be connected to the appliance as shown.
2. Set parameter 5700 to '2' for one heating circuit ­ see section 11.3.k.
NOTE: It is not possible to operate a second heating circuit with a Y­Plan system. Intelligent Installations