Fresh Water Module

Systematic heating

The fresh water module

always ensures hygienically

prepared

drinking water.

The hydraulic module: the right system for all eventualities
No two heating systems are the same. Previously, the different requirements such as the integration of solar heating systems, the connection of multiple buffers or the separation of heating circuits had to be laboriously planned. There were no ready-made solutions including the control system. Commissioning, and in particular the cabling, was often very time-consuming. That's why ETA has developed modules for different requirements, which can be freely combined with one another and always work as a perfect system.
The module
Hygienic and fresh from the buffer:

Fresh water module

ETA FWM
Easy to install and space-saving too.
The ETA fresh water module does not need much space and can either be directly mounted on the buffer or on the wall. The installation effort is minimal as all components are already assembled and pre-wired. Just wire the power connection and the bus line to the ETA touch control system and connect the buffer sensor to the module circuit board terminals. Even the pipework effort is minimal. An optional connecting pipe kit can simply be cut to the right length and pressed in.

If you don't have an ETA control system but would still like to use our fresh water module, that's also no problem. It works without touchscreen too. Simply set the desired temperature on a rotary knob and use the circulation via the ETA Autoloop function.

Works economically.
The high-efficiency pump is activated only when you actually need hot water. The speed is kept as low as possible depending on the desired temperature. To protect the heat exchanger against limescale at buffer temperatures of over 60 °C, ETA has specially developed controlled return admixing via a separate pump. As no hot water is produced for reserves, there are hardly any heat losses with the ETA fresh water module.

The system that thinks:

ETA circulation set
 
The further the water tapping points are from the hot water producer, the more important a good circulation set is. While conventional systems send some hot water through the pipes from time to time, the ETA circulation set is only active when there's a demand. That saves energy.
This is how the circulation is activated:
By the innovative Autoloop system  
By briefly turning on the hot water tap the circulation pump starts immediately, so that the line is flushed. Hot water flows out of the tap after just a short time, even with longer pipes (only possible with touchscreen).
 By manually entering the time: People who shower at the same time every day, for example, can program a fixed circulation for a few minutes earlier (only possible with touchscreen).
Technology
Technical data

Corresponds to DIN DVGW or ÖNORM B5014-3
FWM 33:
Tap output 33 l/min. with 45 °C at 60 °C buffer temperature
Pressure loss module drinking water side:
33 l/min = 580 mbar (5.8 mWs)
15 l/min = 150 mbar (1.5 mWs)
FWM 44:
Tap output 44 l/min. with 45 °C at 60 °C buffer temperature
Pressure loss module drinking water side:
44 l/min = 560 mbar (5.6 mWs)
20 l/min = 160 mbar (1.6 mWs)

Plastic cap H=600 mm, W=400 mm, D=190 mm
Cascadable for greater tap outputs

Scope of delivery

The module is delivered as a whole unit already pre-assembled on a mounting plate and includes:
MicroPlate® plate heat exchanger:
Heating side:
Speed-controlled high-efficiency pump in buffer circuit with check valve
Speed-controlled high-efficiency pump for return admixing (limescale protection) with check valve
Bleed valve (manual)
Connecting ball valves 3/4“ (FWM 44: 1“) internal thread
  
Water side:
Flow meter to determine the current tap quantity
Check valve
Defined connection for circulation set
Flush ball valves DN 15 (1/2") and connecting ball valves 3/4“ (FWM 44: 1“) internal thread according to DIN DVGW or ÖNORM B5014-3

Control system with safety plug: 

The components inside the module are already pre-wired.
Control system contains 2 freely available sensors inputs (for poss. connection of the buffer sensors) and an output for the circulation set.
Loosely enclosed:
CAN-Bus line L=10 m for connection with ETA boiler control system

Technical data
Circulation set

Energy-saving pump
10 bar safety valve, protects the lines from too much water pressure
Circulation line connector DN 20 (3/4") external thread. All components relevant to operation, such as e. g. check valve, are already integrated.