Technical data
www.dimplex.de 01.2012 | Project planning manual for heat pumps for heating and domestic hot water preparation | 123
Integration of the heat pump in the heating system 8.15.7
8.15.7 Bivalent heat pump heating system
Boiler for supplementary heating
Pre-configuration
Setting
Fig. 8.46: Integration diagram for bivalent heat pump operation with a boiler, one heating circuit and a buffer tank connected in
series
Operating mode
Bivalent
Heat
pump+
boiler
1st heating circuit Heating
2nd heating circuit No
Domestic hot water No
Swimming pool No
Regulation of the mixer (M21) is
undertaken by the heat pump
manager. If required, it calls for
the boiler and adds more do-
mestic hot water until the de-
sired set return temperature is
reached. From a return temper-
ature of 65 °C, the mixer closes,
thus protecting the heat pump
from excessively high return
temperatures.
The boiler is requested via the
2nd heat generator
output of the heat pump man-
ager. The operating mode
of the second heat generator
can be coded as "variable" if no
domestic hot water preparation
is activated.(see Chapt. 8.11.1
on page 110).
Boiler for supplementing heating and DHW preparation
Pre-configuration
Setting
Fig. 8.47: Integration diagram for bivalent heat pump operation with a boiler, two heating circuits, a buffer tank connected in
series and domestic hot water heating
Operating mode
Bivalent
parallel
1st heating circuit Yes
2nd heating circuit Yes
3rd heating circuit No
Domestic hot
water preparation
Yes
request Sensor
Flange heater Yes
Swimming pool
water preparation
No
The boiler can also be re-
quested for DHW preparation to
achieve higher domestic hot
water temperatures. From a re-
turn temperature of 65 °C, the
mixer M21 closes, thus protect-
ing the heat pump from exces-
sively high return temperatures.
If an additional flange heater is
installed in the domestic hot
water cylinder the boiler is only
used for reheating and thermal
disinfection when the flange
heater is active in heating opera-
tion.
R1
(X3-R1)
(X2-M13)
M13
T
EB KPV
KPV
MMB
M21
(N1-N07/N08)
00321004
E10.2
(X2-K20)
TC
M
2
3
(X2-M13)
M13
WWM
N1
1
R1
(X3-R1)
(X2-M18)
M18
(N1-N011)
M15
(X3-R5)
R5
(N1-N012/N013)
M22
(X2-M13)
M13
T
MMH
EB KPV
WWM
VTB
KPV
VTB
MMB
M21
(N1-N07/N08)
T
00322024
E10.2
(X2-K20)
TC
TC
M
M
2
4
E9
(X2-K21)
R3
(X3-R3)
T
3
(X2-M13)
M13
WWM
N1
1