84 Chapter 17 Configuration Manual Corrigo Ventilation, revision R17.6 Extra sequence Y4"Extra sequence Y4" can be configured to one of the following alternatives: "Active", "Active withcooling recovery", "Active with enthalpy control" and "Active with both cooling recovery andenthalpy control".Mode Extra Seq-uence Y4Not active17.7 Extra sequence Y5"Extra sequence Y5" can be configured to “Active” or “Not active”.Mode Extra Seq-uence Y5Not active17.8 Heating coilHeatingwaterThe heater can be set to "Water", "Electric", "Water/Electric" or "Not used".For detailed description of heater alternatives, see section 5.1.2 Heater types.17.9 ExchangerExchangerRot. ExchThe heat exchanger unit can be set to one of the following alternatives:• Plate exchanger• Rotating exchanger• Liquid connected exchanger• Mixing dampers• Not connected• Damper limiting for minimum outdoor air percentage is settable 0…100%.In the submenu parameters for outdoor temperature control of exchanger can be set.Outd. temp control ofexch: OffOutd. temp start: 10°CDiff. stop: 0.2°CFor detailed description of exchanger alternatives, see section 5.1.3 Heat exchanger.