Maintenance
©2022 nVent
89217391 Rev. A
103
6.
Prior to changing the filter, connect the supplied drain hose to the manual
drain valve (2) to depressurise the filter housing (1).
7.
Loosen the union nut (4) with a hook wrench. Collect the escaping fluid
(approximately 4 litres). Remove the union nut (4) and open the filter
housing.
8.
Pull the filter insert (3) with the filter out forwards by the handle. Clean the
filter and replace it, if necessary.
9.
Install the filter insert (3) with the new/cleaned filter in the filter housing (1).
10.
Refit the union nut (4) and tighten it with a hook wrench.
11.
Disconnect the drain hose and close the manual vent valve (2).
12.
At the control unit (8), select the automatic filling function. If the filling time
has been exceeded, acknowledge this fact via the control unit. Then, the
pump will restart.
13.
Slowly reopen the shut-off valve (5 or 6) in front of the corresponding pump
(suction side).
NOTICE
Damage to the unit!
There is an increased risk of malfunctions or system downtimes if the tank in the
secondary circuit is not completely filled.
•
Slowly open the butterfly valve. If the refill pump does not start, close the
butterfly valve again.
•
The pump can be switched off if the butterfly valve is opened too quickly.
14.
Connect the supplied drain hose to the manual vent valve (2) and vent the
system. When the medium is clear, close the manual vent valve (2).
Disconnect the drain hose.
15.
Check the threaded fittings upstream of the filters for leaks after the unit has
been switched on.
16.
Close the back door of the cabinet.
17.
At the control unit, select the operating mode "Automatic switching" for the
pumps.
NOTE
If you want to order spare parts, please refer to spare parts catalogue included in
the scope of supply.
