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• Menu sequence and structure
3110086 EHC20 UK 110515
6.2.8 Setpoint value
This value is the control setpoint value for Mode 3 (see ”6.2.1 Rotational speed modes”, page 50). If this value at the
sensor drops below, the rotational speed will be reduced. If it is exceeded, the rotational speed will be increased.
Setting range: 0°C to 90°C / default: 60°C
6.3 R2 rotational speed control
R2 rotational speed control - see ”6.2 Rotational speed control”, page 50
6.4 Relay functions
Free relays, i.e. relays not used in the basic schema, can be assigned the additional functions explained here. Each
additional function can be used only once.
R1 and R2: ELRs / electronically speed-controlled relays
R3 to R6: Mechanical relays 230 V
R7: Potential-free relay
V1 and V2: PWM and 0-10 V outputs
Please note the technical information for the relays (see page 19).
The symbols shown will be displayed on the overview screen as soon as you enable the function.
The numbering in this list does not correspond to the numbering in the controller menu.
6.4.1 Thermostat
Using the thermostat function, you can provide the system with additional energy on a time and temperature-controlled basis.
Setting range: On, Off
Excessively high temperature settings can result in scalding or damage to the system.
The customer must make provisions to prevent scalding.
In economy mode, other values, e.g. T eco may apply.
6.4.1.1 TH setpoint
The target temperature at thermostat sensor 1. Below this temperature, the heating will switch on until
TH shysteresis is reached.
Setting range: -20 - 99°C / default: 50°C
6.4.1.2 TH hysteresis
Hysteresis of the setpoint value.
Setting range: 1 - 50°C / default: 10°C
6.4.1.3 Thermostat sensor 1
Tsetpoint is measured at thermostat sensor 1
If thermostat sensor 2 is connected, the relay will switch on when the temperature drops below ”TH setpoint” at
thermostat sensor 1, and off when ”TH setpoint” + hysteresis at thermostat sensor 2 is exceeded.
Setting range: S1-S8, VFS1-2, Active storage tank / default: none
