10
ON DHW CH FAULT
2
1
0
1
2
3
4
bar
1. Frame
2. Expansion vessel
3. Electronic regulator
4. 2-way modulating valve (primary heating)
5. Heating flow temperature probe (secondary)
6. DHW heat exchanger
7. 2-way modulating valve - DHW
8. Thermal safety thermostat
9. DHW temperature probe
10. Secondary heating drain cock
11. Filling unit with backflow preventer
12. Safety relief valve
13. Flow temp. compensation return probe
14. Primary circuit drain cock
15. Pump UPM3 15-70
16. Protective by-pass
17. DHW priority flow meter
18. Pressure switch
19. Secondary heating strainer
20. Heating exchanger
21. Heat meter spacer template
22. Primary circuit strainer/flow probe pocket
23. Primary air vent cock
24. Primary circuit shut-off valves
SATK30
103HE
Indirect HIU with high-efficiency pump. 40 kW DHW.
Functional characteristics
Heating range
- LOW temperature setting 25–45°C
- MEDIUM/HIGH temperature setting 45–75°C
Set point regulation
DHW production range 42–60°C
Optional functions
Domestic cycle:
- DHW pre-heating function
Heating cycle:
- modulating temperature regulation
with compensated set point
at LOW temperature setting:
- floor slab heating function
Characteristic components
Factory settings
The SATK30103HE HIU is factory set to support
low temperature
heating (25–45°C), according to the following switch setting.
To modify the factory settings and enable the HIU to support
medium/high temperature
systems (45–75°C), proceed as follows.
1 - cut off the electric power supply to the HIU
2 - set switches 2-3 according to the following setting:
3 -
disconnect the thermal safety thermostat (see page 13 ref.
5) and apply a jumper on the cable (see adjacent diagram)
4 - restore the electric supply.
1
2
3
5
6
4
ON
1
2
3
5
6
ON
4
Factory set (do not change)
May be changed to activate optional functions
Switch 1: modulating temperature regulation
with compensated set point
Switch 2-3: HIGH - LOW temperature setting
Switch 5: DHW pre-heating function
OFF
ON
OFF
ON
