4.4
Function
Version 180-2
If version 180-2 is used, ensure that the mixer motor can be controlled by
the boiler controller or by another controller.
1. Verify that the boiler used features a motor controller.
Version RTA
Version RTA is used for storage tank charging of solid fuel boilers.
Version 180-2 DN25 3WM Vario RTA
Version 180-2 DN25 3WM Vario RTA with 3-way mixer and actuator is used
with solid fuel boilers which have a controller for increasing the return tem-
perature. The opening temperature is set at this controller.
Version 180-3 RTA
Version 180-3 RTA automatically controls the return temperature of the sys-
tem water to the heat generator to the value adjusted in the valve. The ther-
mostatic mixing valve mixes the temperature of the return to the heat gener-
ator to the permanently adjusted minimum temperature (60 °C). Above this
temperature, system water is fed into the hot water storage tank.
4.5
Approvals, conformities, certifications
Refer to the operating instructions of the actuator. See operating instructions
of the manufacturer of the circulation pump for versions with circulation
pump.
Product description
PrimoTherm® DN25
EN
17