14
Thermann Installer's Manual
Heat Pump Water Heaters
Example 2 : Photovoltaic signal via on-site relay and phase routed out of the appliance
Note
The relay in the inverter must meet the following requirements:
-
Potential-free relay (240
V
AC
/ 24
V
DC, 1
A) with N/O contact
-
Adherence to safety regulations and standards for safety extra low voltage
-
The switching output must be programmed so that the relay contact closes or opens if certain lim-
its (inverter output level) are exceeded or undershot.
If necessary, check with the inverter manufacturer whether the product meets the stated criteria.
X0
2
L
L
N
N
PE
PE
L
N
PE
GNYE
BU
BN
1
1
2
1
X3
2
3
3
1
1
2
D
00000
5
9
15
5
1
Inverter (floating contact)
BN
Brown
BU
Blue
GNYE Green/yellow
The inverter power feed is usually located at a central distribution point (e.g. in the main distribution board).
Assembling the appliance
Note
Refit the appliance cover after completing your work. See chapter "Maintenance and cleaning
/ Fitting
the appliance cover".
Commissioning
Initial start-up
Note
Fill the hot water cylinder before switching on the power supply to the appliance.
The appliance is equipped with boil-dry protection to prevent operation if the hot water cylinder is not
completely full of water.
Note
Following an interruption of the power supply, compressor operation remains blocked for at least one
minute while the appliance initialises.
If the compressor subsequently fails to start, it may be blocked by additional safety devices (motor
overload relay, high pressure switch). This block can last between 1 and 10
minutes.
Filling the hot water cylinder
Fill the hot water cylinder and vent the pipework by following the procedure below:
f
f
Close the drain valve.
f
f
Open all hot water draw-off points and the shut-off valve in the cold water supply.
f
f
Close the hot water draw-off points as soon as water starts to emerge from them.
f
f
Check the safety valve by leaving it open until water runs out.
