Settings; Setting Of Control And Feed Height - Biral AX 12 Instructions D'installation Et D'entretien

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5 6
B
A Control keyboard
B Company nameplate
english

6. Settings

6.1 Setting of control and feed height

Item Description
1 Control key
2 Controlled operation: Proportional pressure (pp)
Suggested for the following equipment:
– Dual pipe systems with thermal valves and
– long stretches of pipe
– valves with a large working area
– high pressure loss
– Primary circuit pumps with high pressure loss
3 Controlled operation: Constant pressure (cp)
Suggested for the following equipment:
– Dual-pipe systems with thermal valves and
– Feed height < 2m
– Natural circulation (formerly gravity heating)
– with very low pressure loss
– Primary circulation pumps in systems
with low pressure loss
– Floor heating with thermostatic valves
– Single-pipe heating
4 Uncontrolled operation: Constant speed (cs)
The operating point can be optimally adjusted
by altering the speed (A2 buttons).
Suggested for systems with constant volume flow:
Air conditioning units, heat pumps, boiler feed pumps, etc.
5 Automatic night reduction Aut.
A
If the forward flow temperature in the system decreases
by 10° to 15°C (min. 0.1°C/min.), the pump output
is reduced to «min. » after approx. 2 hours.
If the forward flow temperature increases by 10 °C,
changeover is made immediately to control operation.
LED lights: «Automatic night reduction» function
is connected.
Note:
– At constant speed I, II or III, the automatic night
reduction is deactivated.
The following conditions must be satisfied
for the automatic night reduction to function properly:
– The pump must be installed in the forward flow
of the heating.
It does not function in the return flow.
– The heating must have a control for temperature
of the medium.
6 The indication shows the present power consumption
of the pump with the mains supply switched on.
A malfunction of the pump is indicated with «- -».
See section 9 for elimination (fault summary).