The diagrams below show the control sequence of modulating PI control.
Heating and cooling mode (P001 = 4)
Heating mode with manual selection
(P001 = 3) or
for energy saving (P010 = 2 & P014) in
heating sequence
Cooling mode with manual selection
(P001 = 3) or
for energy saving (P010 = 2 & P015) in
cooling sequence
YH Control command "Valve"
(heating)
w Room temperature setpoint
YC Control command "Valve"
(cooling)
XpH Proportional band "Heating"
(P050)
XpC Proportional band "Cooling"
(P052)
The diagrams only show the PI thermostat’s proportional part.
For setting sequence and control outputs, see Application overview [➙ 42],
Sequence overview (setting via P001) [➙ 75] and Control outputs [➙ 99].
Parameter P256 (RDG26..KN) sets the heating flow limitation when using a PICV.
See Additional functions [➙ 47].
Modulating control:
3-position, PWM, or
DC 0...10 V
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