18
Subject to technical amendments without prior notice | 83070100bUK | ait-deutschland GmbH
10 Insulating hydraulic
connections
Insulate hydraulic lines in accordance with local regu-
lations.
1.
Open shut-off devices.
2. Perform a pressure test and check for leaks.
3. Insulate external piping on site.
4.
Insulate all connections, fittings and pipes.
11 Commissioning
►
Place the hood on the hydraulics of the unit be-
fore connecting the power supply of the unit and
commissioning (
“5.2.3 Facilitating transport”,
page 7).
Check that:
The water supply to the domestic hot water tank
is open
The domestic hot water tank and heating circuit
are filled
All shut-off devices on the unit are open
All vent valves are completely closed
The safety temperature limiter has not tripped
(
“14.1 Unlocking the safety temperature lim-
iter”, page 19)
Hydraulic installation and electrical connection
work have been carried out properly.
►
Follow the instructions for commissioning in the
heating and heat pump controller HPC operating
manual.
Heating and heat pump controller HPC operating
manual, “Commissioning and setting” section
12
Overflow valve
The overflow valve adjustment procedure should be
performed as follows during system startup:
1.
Open the overflow valve (
➀
) completely.
Turn the adjusting knob (
②
) on the overflow valve
to the right to increase the temperature difference
(the temperature drop), and turn it to the left to re
-
duce it.
1
2.
Close the flow on all heating circuits after the
overflow valve.
3. Go to menu 5.6 “Forced control” and manually set
the speed of the feed pump to 100%.
4. Continue to menu 3.1.11.
5.
Close the overflow valve by a quarter of a turn
at one-minute intervals, while checking the flow
rate indicator in menu 3.1.11. When the “Minimum
flow during defrosting” value is reached, close the
overflow valve fully.
6. In menu 5.6 “Forced control”, open the heating
circuits again and set the circulation pump to au-
tomatic operation.
