Control modes, user interface and settings
17
Medium UPM
6
Selection of control mode
The selection of the control mode depends on the
system type and the allocation of pressure losses
defined by the valve or consumer authority.
System type Recommended control mode
Heating system with PWM control of the pump.
PWM A profile
Solar system with PWM control of the pump.
PWM C profile
System without PWM control of the pump (stand-alone). Internally controlled
Variable-flow system with relatively
high pressure losses inside heating
appliance and pipes (> 50 % of pump
head).
Two-pipe systems with
thermostatic radiator valve with
low valve authority.
H
N
> 2 m for noise reduction.
Proportional pressure / AUTO
ADAPT
proportional pressure
Long distribution pipes.
High pressure losses in system parts
with total flow.
Heat consumers with low pressure
losses.
Primary pump.
Primary circuit with high pressure
losses.
Variable-flow system with relatively
low pressure losses inside heating
appliance and pipes (< 50 % of pump
head).
Two-pipe systems with
thermostatic radiator valve with
high valve authority.
H
N
≤ 2 m for noise reduction.
Constant Pressure / AUTO
ADAPT
Constant Pressure
Former gravity systems.
Low pressure losses in system parts
with total flow.
Heat consumers with high pressure
losses.
Floor heating system with
variable flow.
System with thermostatic zone
valves.
One-pipe system with variable
flow.
System with thermostatic radiator
valves.
Primary pump.
Primary circuit with low pressure
losses.
Systems with low flow variation.
Systems with minimum flow ensured
by an automatic bypass valve.
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