Setting Up
©2022 nVent
89217391 Rev. A
49
9.6.3
Secondary circuit
9.6.3.1
Using internal fill pump
When starting the unit for the first time, fill the secondary circuit with fluid as per the
"Technical data" section.
NOTE
Ensure that the following conditions are met during the filling process:
•
Use clean tools and personal protective clothing.
•
Use clean auxiliary devices (e.g. pail, container).
Fig. 15: Filling the secondary circuit
Perform the filling process as follows:
1.
Open the lock (3) of the control cabinet.
2.
Open all shut-off valves or butterfly valves.
Fig. 16: Manual opening of the control valve
3.
Open the electrical control valve manually to ensure proper venting of the
system (see the illustration).
