User Guide

Figure 77 Central heating mode

Figure 78 Domestic hot water (DHW) mode

Figure 79 Boiler without main power supply

Boiler without Power

Part number 550-100-325/0718

AquaBalance

SERIES 2 WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual

26 Controls and operation (continued)

Central heating operation

The Central Heating heat demand (generated by the Room Thermostat) is indicated by the ﬂashing of the Hot Air symbol over

the radiator (Items 12 and 13 - Figure 76, page 58). The display indicates the actual Central Heating water temperature (Item 10 -

Figure 76, page 58) and when the required set point temperature is reached “d2” will be displayed.

NOTE: Heating Only boilers must be in “eco mode’. (with NO Indirect Water Heater Tank)

Domestic hot water operation

The Domestic Hot Water heat demand (generated by the DHW ﬂow sensor) is indicated by the ﬂashing of the Hot Water symbol

under the tap (Items 8 and 9, Figure 76, page 58). The display indicates the actual Domestic Hot Water temperature (Item 10,

Figure 76, page 58 and after Hot set point temperature is reached “d1” will be displayed.

NOTE: Combi boilers recommended to be in “comfort” mode.