7
2.3 VMF-MOD BOARD CONNECTION (ACCESSORY)
For hydronic systems where a variable ow rate is required in the circuit that feeds the post-treatment coils, the RPLi recovery unit regulator can manage the modulating valves
thanks to the use of the VMF-MOD expansion (accessory).
M26
M28~PE2
SW1
vmf-mod
230Vac
Vout 1
GND
Vout 2
+24[V]
GND
DIP 2
DIP 1
VMF-MOD
Output name
Type of installation Controlled valve
Vout 1
2-pipe system Cold / hot branch valve
4-pipe system Hot branch valve
Vout 2
2-pipe system No function
4-pipe system Cold branch valve
By setting dip switches 1 and 2 it is possible to select between two dierent functioning curves (for the hot branch and cold branch), as indicated in the following graphs:
100%
0%
3 [°C]
T
SAM
- T
SA
100%
T
SA -
T
SAM
4[°C]
0%
Cooling
Heating
5 [°C]
6[°C]
DIP 1 = OFF
Heating:
DIP 2 = OFF
Cooling:
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