Control Mode Explanation; Proportional Pressure; Constant Pressure; Constant Curve - Ecodan 150 Standard Installation And Servicing Instructions

Control Mode explanation

Proportional pressure

The head pressure is reduced at falling heat demand
and increased at rising heat demand.
The duty point of the circulator will move up or down on
the selected proportional pressure curve depending on
the heat demand in the system.

Constant pressure

The head pressure is kept constant, irrespective of the
heat demand.
The duty point of the circulator will move out or in on
the selected constant pressure curve, depending on the
heat demand in the system.

Constant curve

The circulator runs on a constant curve, which means
that it runs at a constant speed or power.
The duty point of the circulator moves up or down the
selected curve, depending on the heat demand in the
system.
Graph 1 - UPM3 performance curve
14
• PP1: lowest proportional
pressure curve
• PP2: Intermediate
proportional
curve
• PP3: Highest proportional
pressure curve
• CP1: lowest
pressure curve
• CP2: Intermediate
constant pressure curve
• CP3: Highest constant
pressure curve
Constant Constant
Curve Curve
CC1 4 m
CC2 5 m
CC3 6 m
CC4 CC4
7 m
(max.) (max.)
pressure
constant