© Termo-tehnika, d.o.o.
17-16-27-3033-00
13
07/2016
Picture 3: Minimal clearances
6.5 Installation of the device
6.5.1 Hydraulic connection
The hydraulic connection has to be installed in accordance with the national and local
regulations for connecting buffer tanks for DHW in force. The maximal pressure in the buffer
tank for DHW must not exceed 6 bar. In case the pipe heat exchanger in the buffer tank for
DHW will not be used, it must be filled with anti-freeze liquid to prevent corrosion in the heat
exchanger. The filled conductor must not be closed tightly on both sides (equalisation of
pressure because of temperature differences).
Installing an expansion tank of appropriate volume is mandatory.
CAUTION
Because different materials are used on the pipe installation, all connections on
the heat pump (cold and hot water, circulation, heat conductor) have to be
galvanically isolated; otherwise corrosion can occur on the inner side of the
buffer tank. We recommend placing galvanic isolators made of red brass the
length of at least twice the diameter of the pipe on the connections.
CAUTION
The buffer tank for DHW is intended for storing drinking water, this is why the
water has to be in accordance with the national regulations on drinking water in
force; otherwise, damage and a termination of the warranty can arise.
Dimensions of the expansion tank:
Pressure setting of the safety
valve [bar]
6
10
Precharge [bar]
3.0
3.5
4.0
3.0
3.5
4.0
Volume of the DHW [L]
Volume of the appropriate expansion vessel [L]
200
10
13
17
6
6
7
250
12
16
22
8
8
9
300
15
19
26
9
10
10
400
19
25
35
12
13
14
500
24
32
44
15
16
17
800
39
50
70
24
25
28
1000
48
63
87
30
32
34
*This is only a recommendation. * The actual size of the expansion tank has to be defined by the installer/design
engineer according to the extent of the system the device will be installed in.
CAUTION
For normal operation of the expansion tank, it is necessary to perform proper
adjustments of the tank’s working pressure according to the pressure in the water
supply network. The settings have to be checked every 6 months.
