Instruction manual
PrimoBox ACB 910 mixing unit for condensing boilers
19
8
Switching the actuator to manual operation
Switching from automatic to manual operation is carried out by means
of the operating mode button.
Fig. 14: Actuator mode button
The pressed operating mode button enables
manual operation, i.e. free operation
of the actuator with an allen key.
9
Maintenance
WARNING
Mains voltage (230 V
AC
) can cause serious injury or death.
Disconnect the power supply with the external switch before
each operation.
To ensure correct operation of the ACB unit for condensing boiler
and other system components, keep the heating medium at the level
of the smallest possible contamination and at the level of hardness
and pH recommended by the boiler manufacturer. Due to the copper
pipes included in the ACB unit, special attention should be paid
to water hardness, scale and other deposits.
At
least
once
a
year,
as a precautionary
measure,
check the condensing boiler (unless its manufacturer specifies
otherwise), the primary circuit and heating circuits, and the ACB
mixing kit. The following are crucial: visual tightness control,
control of elements integrity, visual control of potential damages,
control
of
electrical
connections
and
condition
of
wires.
Before the heating season, it is also recommended to check
the circulation pump by making a test run. PrimoBox ACB mixing units
do not require additional maintenance than those listed in chapter 9.
