Rotex Controller Series Product Documentation page 130

EbV
Operating mode 4 – Discharge control for HC requests only
System hydraulics:
OS
BU
Buffer
Controller function:
Buffer demand
As operating mode 3, except that the requests from DHW control are sent directly to
the heat generator.
An active hot-water priority only acts on the heating circuits when there is no buffer
discharge in progress.
See the table below for detailed correlations.
Operating mode 5 – Loading control with DHW switchover
System hydraulics:
OS
BS
Heat
generator
The heating circuit controls send their demand value to buffer control. Hot-water and
buffer control request energy from the heat generator when required. The BULP
(PLP) output is ON during buffer discharge and DHW loading.
Any active DHW priority is not effective in this mode.
8-46
BS
Heat-
BURN 1
generator
DHWS
SOL-P
BULP
Buffer
Product documentation THETA NORM/UNIT
VF2
VF1
HC-P
MC1
BULP
DHWS
SOL-P
Domestic hot
water
tank
HC-P
BU
BU-2
MC2
HC
VF2
VF1
MC2
MC1