The water heaters models electric circuit schema are shown on Fig. 1 and Fig. 2, the number
indications are provided in Table 3.
2.1 Connecting to UPS
The manufacturer has installed the tank so that it will work without an UPS device. In case of
necessity to supply power with an UPS device, it is necessary to use the column terminal labeled 2
in Fig. 1 and Fig. 2 in order to remove the wires (bridges) connecting terminals L to UPS with L
from UPS and N to UPS with N from UPS, indicated by a dotted line. To the terminals thus empties
connect the UPS device. The UPS power cable is connected to the terminals L to UPS (phase) and
N to UPS (zero). The UPS output is connected to the terminals L from UPS (phase) and N from
UPS (zero).
IMPORTANT!
It is obligatory to connect correctly the output cable of the UPS to the right terminal in
the unit, i.e. compliance with phase and zero!
When removing the power supply from the UPS device the wires must be reconnected to the
column bridge terminal 2, respectively L to UPS to L from UPS and N to UPS to N from UPS.
ATTENTION!
In case of improper connection of UPS or improper recovery of the bridging wires, the
electronic unit will not work and it is very possible to damage it and increase the risk of electric
shock!
It is necessary to secure the power cord to the power circuit of the water heater and the power cord
from the UPS to the electronic unit against displacement by using the cable clamp located next to
the hole for the cable in the plastic cap.
Table 3 - Indications and terminals of the electronic unit components* in Figures 1-2
№
Functions
Installation / Purpose
1
Unit power supply
2
UPS terminal
3
Thermal sensor NTC 10K,
2m, PVC
It is installed in the middle part of the water heater above the lower heat
exchanger (coil-pipe). Measures the temperature - t5
4
Thermal sensor NTC 10K,
0.5m, PVC
It is installed in the lower part of the water heater next to the electric
heater, Measures the temperature - t1
5
Circulation pump 1
Controls circulation pump 1
6
Circulation pump 2
Controls circulation pump 2
7
Thermal sensor NTC 10K,
2m, PVC
It is installed in the upper part of the water heater above the top heat
exchanger (coil-pipe). Measures the temperature - t2
8
Thermal sensor pt1000,
0.5m, Teflon
It is installed in the solar collector. Measures the temperature - t3
9
Thermal sensor NTC 10K,
2m, silicone
It is installed in a boiler, fireplace or other. Measures the temperature -
t4.
10 Magnesium anode
Not available in water tanks made of chrome-nickel steel.
11 Heaters
5
