2-pipe applications

In changeover applications, the Comfort setpoints for the heating and cooling sequences are identical (w).

In 2-pipe applications with electric heater (RDF400.. and RDF460..), the Comfort setpoint is either at the first heating sequence (in heating mode) or at the cooling sequence (in cooling mode).

The setpoints for Economy and Protection are below the Comfort setpoints (for heating) and above the Comfort setpoints (for cooling).

They can be set via P22, P23 (Economy) and P50, P51 (Protection).

 

Application

Comfort

Economy/Protection

Heating

Cooling

Heating

Cooling

2-pipe

2-pipe with electric heater
(RDF400.. and RDF460..)

1) If electric heater is enabled when cooling (P40 = 1).

2) In case of manual changeover (P02 = 4), the first heating sequence is disabled to prevent heating (electric heater) and cooling (coil) at the same time.

W = Setpoint in Comfort

WHeatEco/Prot = Setpoint heating in Economy or Protection

WCoolEco/Prot = Setpoint cooling in Economy or Protection

YE = Electric heater sequence

4-pipe applications

In 4-pipe applications, the Comfort setpoint (w) is in the middle of the zero energy zone, between the heating and cooling sequence.

The zero energy zone can be adjusted via P41.

If manual changeover is selected, then either the cooling sequence or the heating sequence is released. Here, the Comfort setpoint is at the selected heating or cooling sequence.

Application

Comfort

Economy/Protection

Heating and cooling

Heating only 1)

Cooling only 1)

Heating and/or cooling

4-pipe

1) Manual changeover, P02 = 4

W = Setpoint in Comfort

WHeatEco/Prot = Heating setpoint for Economy or Protection

WCoolEco/Prot = Cooling setpoint for Economy or Protection