Danfoss iC7 Series Operating Manual page 33

iC7 Series Cooling Modules
Operating Guide
6.14 Draining the Cooling System
Procedure
1. Power off the cooling module.
2. Connect draining hoses to valves V212 and V213.
See 6.13 Location of Valves and
3. Open valves V211, V212, and V213.

Coolant starts to flow out through the draining hoses.
4. When the reading of pressure gauge PG11 drops to 0 bar, open the deairing valve V218.

The decreased draining flow increases.
5. Turn the 3-way valve V111 to approximately 45° by using the manual turning screw on the actuator.

The decreased draining flow increases.
Most of the coolant is drained after this step. If it is necessary to drain the system as empty as possible, also do the
steps 6–9. If not, skip to step 10.
6. Turn the pump shut-off valves V112 (and V113 in +SAP2 modules) and V121 (and V122 in +SAP2 modules) to the closed
position and back to the open position.

A small amount of coolant is released.
7.
Connect draining hose to valve V214 (and V215 in +SAP2 modules).
8. Valve V214 (and V215 in +SAP2 modules) has a plug by default. Remove the plug.
9.
Open valve V214 (and V215 in +SAP2 modules).

A small amount of coolant is released.
10. Turn all valves back to their default positions.
11. Dispose of the drained coolant. Follow the currently applicable international and local laws and regulations.
Be aware, that some coolant remains in the piping under the level of valves V211, V212, and V213.
6.15 Flushing the Pipes
All user-made piping in the drive circuit and the external circuit must be flushed before they are connected to the cooling module.
Procedure for TIG welded pipes
1. Flush the pipes by blowing pressurized air through them.
Procedure for pipes that have been welded by other means than TIG
1. Flush the pipes with water at a minimum flow of 3 m/s.
Continue flushing for 5 min.
Danfoss A/S © 2022.02
Instrumentation.
Cooling Installation
AQ339830072437en-000202 / 172F0589 | 33