Rotex Controller Series, Product Documentation

Page: 129 / 192

EbV Product documentation THETA NORM/UNIT
8-45
The heating circuit controls send their demand value to buffer control. Hot-water and
buffer control request energy from the heat generator when required.
With hot-water priority activated, this function acts on the buffer loading pump but not
on the heating circuits.
See the table below for detailed correlations.
Operating mode 3 – Discharge control HC and DHW requests
System hydraulics:
Heating-circuit and hot-water control send their demand value to buffer control. The
BULP (PLP) input switches ON when the energy demand can be met by the buffer.
If the energy in the buffer is insufficient, buffer control requests additional energy
from the heat generator and BULP (PLP) switches OFF.
BULP (PLP) is switched off when there is no request from the heating circuits and
from hot-water loading.
See the table below for detailed correlations.
OS
BU
BS
BURN1
BULP
HC-P
MC1
MC2
VF1
VF2
SOL-P
DHWS
Domestic hot
water
tank
Heat
generator
Buffer