Instruction manual
18
PrimoBox ACB 910 mixing unit for condensing boilers
7
Assembly of the ARM ProClick actuator
The PrimoBox ACB condensing boiler mixing unit is equipped
with ARM ProClick electric actuators. It is possible to easily disassem-
ble and reassemble the actuator.
The ARM ProClick actuators
are removed from the valve
by pressing the button on the side
of the actuator housing and pull-
ing the actuator towards you.
Fig. 12: Actuator latch release
button on the valve
In order to mount the ARM ProClick actuator on the mixing valve
of the ACB mixing unit, the mixing valve should be set to "50% open",
i.e. the indicator of its cover (Fig. 13) is exactly halfway between
the connection "C" and connection
“B”
of the four-way valve.
Fig. 13: Valve closing component indicator
Then slide the actuator onto the mixing valve
until the actuator ProClick mechanism locks
on it. When mounting the ProClick actuator
on a rotary valve, pay attention to the current position of the valve
indicator. The valve stem should be positioned as in Figure 13,
and the actuator position indicator should show half the scale (vertical
position).
If the valve is in a different position, it must be set manually (using a
flat screwdriver, for example) as shown in Figure 13. If the indicator
on the actuator does not indicate the center of the scale (it is not ver-
tical), it should be switched to manual mode, set the actuator
with an allen key so that the indicator is vertical and indicates the cen-
ter of the scale. After putting the actuator on the valve, switch back
to automatic mode.
