Page 191.13 Frost Protection (Ice Protection function)Ice Protection function works to reduce the risk of freezing and thereby protect the fabric of theboiler if either the CH Flow or CH Return temperature falls below 5°C. The ice protectionfunction will force the appliance to operate until the CH Flow temperature rises above 30°C.This mode operates even when all timeclocks are set to ‘OFF’, and also if the control panel isset to the ‘OFF’ mode using the Mode button (3).Be aware of unexpected firing in these conditions.The boiler must have a permanent live AC supply and an adequate fuel supply for the functionto operate.When the function is operating ‘ICEP’ is displayed on the LCD.1.14 Circulating Pump and Diverter Valve Exercise FunctionsIf the boiler has not operated the circulating pump or the diverting valve for a period of 24 hours,it will operate these components for 10 seconds to prevent locking.The boiler must have a permanent live AC supply for this function to operate.1.15 Speed adjustment of the circulating pump1.15.1 Combination BoilersThe speed of the circulating pump is controlled in both CH and DH modes by a signal from thecontrol panel. If the maximum speeds need to be adjusted to suit site conditions, refer toEngineer Parameters in Section 11.7.1. The settings on the circulating pump must not beadjusted from the factory default of PWM Profile A (heating).1.15.2 Pumped and System BoilersThe speed of the circulating pump can be adjusted using the pushbutton and LED indicationson the pump. Please refer to the manufacturer’s documentation which is available viawww.warmflow.co.uk/support/downloads.