19
Connecting the heat pump to the heating system
Individual temperature control in each room and increasing volume of
internal water
This solution is used to control the temperature of each room, for example, where thermostatic valves are used on the
radiators in each room. The function of the heat pump is to maintain a temperature in accordance with the heat curve
(depending on outdoor temperature) in the 100 litre primary water storage tank. The water is then distributed from the
store to the heating system. This solution also allows the overall volume of the installation to be increased if the volume of
the heating system is inadequate, for example with one or two fan-assisted radiators.
This system design is intended to ensure that the heat pump is able to continue operating if the fl ow falls below 70% of the
nominal system fl ow.
* Mixed heating system
There is a possibility to control a
second heating system with a mixing
valve. This is recommended when a
combination of radiators and a
fl
oor
heating system is used.
E10 Central
heating
system
C11: Expansion
vessel
G1 (P1): Radiator pump
Q12: Isolating
valve
E20 Heating
system
E21: Heat
pump
E22:
Electric water heater
F21: Safety
valve
G2 (P2): Heating system pump
Q21: Diverter
valve
V21:
Filter heating system
E30 Heat
transfer
fl uid
F31: Safety
valve
G3 (P3): Heat transfer
fl
uid pump
Q32: Isolating
valve
Q35: Air
vent
(manual)
V31:
Filter heat transfer
fl
uid in
E40 Mixed
heating
system
G4 (P4): Pump for mixed heating system
Q41: Mixing
valve
Q42: Isolating
valve
E60
Domestic hot water system
V60:
Hot water draw-off
W60:
Cold water cylinder inlet
C61:
Expansion vessel *
F61:
Pressure relief valve
F62:
Temperature and pressure relief valve
Q62: Isolating
valve
Q63:
Pressure reducing valve
Q64:
Non return valve
Q65: Tundish
T1 Central
heating
water
T2 Outdoor
T3 Domestic
hot
water
T4
Mixed heating system
T5 Room
T6 Compressor
T8 Primary
fl
ow
T9 Primary
return
T10 Heat
transfer
fl
uid (coll) in
T11 Heat
transfer
fl
uid (coll) out
* Expansion vessel
No valve should be
fi
tted between
the expansion valve and the
storage cylinder.
