Heating Circuit Constant Temperature Control; Fixed-Value Control - Honeywell SDC heating and district heating controller Service Manual

Hydraulic Components
7.3.2
NOTE
Function
See also
7.3.3
Function
168
On the start day, heating to 25°C is carried out until midnight. The
first day of floor covering heating starts at midnight of the
following day.
T
VLSoll
[˚C]
40
35
30
25
ST 1 2 3 4 5 6 7
Maximum temperature setting = 40°C.
Progression of screed function over time with floor covering
heating.

Heating circuit constant temperature control

This function must be activated in the "Hydraulics" menu for the
corresponding heating circuit (direct heating circuit, mixed heating
circuit 1, mixed heating circuit 2).
The control circuit is operated with a constant temperature
specification. The demand value is transmitted to the heat
generator. The switching program of the respective heating circuit
and the control modes can be activated.
The specification of the constant temperature occurs via
parameter "constant temperature setpoint".
Upon activation of the function on a mixed heating circuit output, a
flow sensor is to be set for adjustment of the flow temperature.
5.4.4 "Direct heating circuit" menu (UNMIXED CIRC), Pg. 92

Fixed-value control

As with constant control. The demand value is not transferred to
the heat generator, and the switching time program and control
modes can be activated.
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
SDC / DHC
t
EN2H-0221GE51 R0808