Parameter
Meaning
CONST. FL. CIRC.
If TEMP DIFF CIRC. is set to
the flow is continuous with this value in the heating
system. Value indicated in Volts.
Factory setting: 7V, range: 3V – 10V
MIN FLOW CIRC.
Lowest permitted voltage (speed) of the circulation pump in the heating system.
Factory setting: 3V, range: 3V – 10V
MAX H.W CHARGE HW
Highest supply temperature during water heating.
Factory setting: 55°C, range: 45°C – 65°C
MIN CHARGE. HW
Lowest desired supply temperature during water heating.
Factory setting: 50°C, range: 30°C – 65°C
10.10 BUFFER TANK
Parameter
Meaning
CONFIGURATION
With integral control heating is produced according to the house's heating
demand. With tank control a fixed value is stated for the buffer tank.
Factory setting: INTEGRAL CONTROL, range: INTEGRAL CONTROL – TANK CONTROL
RET. LINE. HP SHUNT
When the heat pump is inactive the heat is shunted from the buffer tank to the
heat pump at set temperature.
Factory setting: 25°C, range: 20°C – 30°C
SHUNT TIME RET.
Indicates shortest permitted time between control signals to the return line shunt.
Factory setting: 30S, range: 10S – 99S
TANK HYST. HP
Indicates the number of degrees from the desired buffer tank temperature when
the heat pump must start to heat the buffer tank. A condition is that CONFIGURA-
TION = TANK CONTROL.
Factory setting: 4°C, range: 2°C – 20°C
TANK HYST. IMM
Indicates the number of degrees from the desired buffer tank temperature when
the immersion heater must start to heat the buffer tank. A condition is that CON-
FIGURATION = TANK CONTROL.
Factory setting: 7°C, range: 2°C – 20°C
TANK HYST. EXT
Indicates the number of degrees from the desired buffer tank temperature when
the external auxiliary heater must start to heat the buffer tank. A condition is that
CONFIGURATION = TANK CONTROL.
Factory setting: 10°C, range: 2°C – 20°C
62 – Installation instructions VMGFD102
