Honeywell SDC heating and district heating controller Service Manual page 201

SDC / DHC
EN2H-0221GE51 R0808
Control mode 1 – Loading control for heating circuit and hot-water
demand
System hydraulics
KF
PLP
BR 1
a
a Heat generator
b Buffer tank
Heating circuit and hot-water controls send their demand values
to buffer control. Buffer control demand additional energy from the
heat generator via the buffer loading pump.
See the table below for detailed correlations.
Control mode 2 – Loading control for heating circuit demand
System hydraulics
AF
KF
BR1
a
a Heat generator
b Buffer tank
VF1
AF
DKP
PF
b
PF2
c Hot-water tank
PLP
b
SLP
c
c Hot-water tank
Hydraulic Components
VF2
MK1 MK2
SLP
VF1
DKP
MK1
PF
PF2
SF
SF
c
VF2
MK2
201