109
Aquarea air / water heat pump – design handbook 07 / 2014
Example 5
Hydraulic decoupling of the heating circuits via a buffer tank
Bivalent operation with an additional heating unit via an external system controller
Hot water heating via a hot water tank
CLOSE
OPEN
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CLOSE
OPEN
CLOSE
OPEN
N
COOL
HEAT
N
L
N
M
M
1
2
4
5
6
3
8
7
M
Schematic illustration – relevant standards and
guidelines must be observed!
1
Cold water connection
2
Room thermostat
3
Outside temperature
sensor
(integrated in the outdoor unit)
4
Control for heating circuit
mixer (building side)
5
Hot water tank
6
Buf
fer tank
7
Higher-level control of bivalent operation for
heat pump and
additional heating
8
Heating unit with burner