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12
99B138120x-mub-en | 2014/11 | V05
EN
3.4.4 FriwaMidi / FriwaMaxi / FriwaMega
Inputs
Terminal
Individual operation mode /
Cascade operation mode
1,
Flow temperature, primary (TVL)
2,
Domestic hot water temperature, secondary (TWW)
3,
Optional: sensor for tank temperature (TSP)
4,
Cold water temperature, secondary (TKW)
E.1, T
(Domestic hot water temperature, secondary)
E.1, V‘
Flow rate, secondary
E.2, T
(Domestic hot water temperature, secondary)
E.2, V‘
Flow rate, secondary (only FriwaMega)
Outputs
Terminal
Individual operation mode
Cascade operation mode
R1, N
---
Sequence valve
R2, N
Return valve (optional)
Return valve
(optional, at the master controller)
R3, N
Bypass (depending on station)
Bypass (depending on station)
L
const.
, N
Primary pump,
Secondary pump (circulation)*
Primary pump,
Secondary pump
(circulation, at the master controller)*
PWM R1,
Primary pump
Primary pump
PWM R2,
Secondary pump (circulation)
Secondary pump
(circulation, at the master controller)
Rs, Rs
Alarm
Alarm
Caution
* When using a circulation pump, especially with the FriwaMega, the power consumption
of the pumps connected to the controller must absolutely be observed and it has to be
checked whether they are compatible with the controller. In some cases the circulation
pump the circulation pump directly has to be supplied by the mains connection. The speed
is controlled via the PWM signal.
The active valve R1 is not displayed on the controller display.
The active valve R3 is displayed as a flashing heat exchanger on the display of the controller.
L
const.
PWM (R)1
R2
1
L
const.
PWM (R)2
R1
E.1
E.2
4
2
3