
Figure 77
Central heating mode
Figure 78
Domestic hot water (DHW) mode
Figure 79
Boiler without main power supply
Boiler without Power
Part number 550-100-305/0118
61
AquaBalance
TM
W
ALL
M
OUNT
GAS
-
FIRED
WATER
BOILER
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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 60). The display indicates the actual Central Heating water temperature (Item 10 -
Figure 76, page 60) 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 60). The display indicates the actual Domestic Hot Water temperature (Item 10,
Figure 76, page 60 and after Hot set point temperature is reached “
d1
” will be displayed.
NOTE: Combi boilers recommended to be in “comfort” mode.