SI0270 (219)
11
JOHNSON CONTROLS
13. With hoses connected to the tube and shell heat exchanger and the inductor, place the other end of the hose in a
suitable container for disposal of the trapped liquid and apply 5 PSI compressed air or nitrogen in the top fitting
on the output inductor to blow residual liquid out of the output inductor and heat exchanger.
WARNING: Do NOT exceed the 5 PSI rating. Damage to the cooling system my result.
Once coolant stops flowing turn off the air supply, close the valve, and remove drain hoses.
14. Close all valves and replace all caps.
15. System is now drained.
Draining the System (HYP0490 Mod B, HYP0612, HYP0730, HYP1100, HYP1278 and HYP1300
Model Drives)
The following drain procedure applies ONLY to HYP0490 Mod B, HYP0612, HYP0730, HYP1100 and
HYP1278/HYP1300 model drives.
If at least 3 hoses are available, the heat exchanger and the input/output inductors can be drained at the same time. If
multiple hoses are not available, this procedure will need to be repeated as necessary to drain all of the components.
Please see previous diagrams for GHT locations on each drive model.
1. De-energize and lockout the drive using all applicable policies and appropriate drive service literature.
2. Remove coolant reservoir cap.
3. Attach the drain hose to the GHT faucet valve on the bottom of the shell and tube heat exchanger.
4. Place the other end of the hose in a suitable container for disposal of the trapped liquid.
5.
Open the heat exchanger valve to allow coolant to drain. Once coolant stops flowing close the valve.
6.
Attach the drain hose to the top fitting of the output inductor inside the drive cabinet.
7.
Attach the drain hose to the top fitting of the input inductor inside the drive cabinet.
8. Place the other end of the hoses in a suitable container for disposal of the trapped liquid.
9.
Open the top valve of the input and output inductors to allow coolant to drain. Once coolant stops flowing close
both valves, and remove drain hoses.
10.
Attach the drain hose to the bottom fitting of the output inductor inside the drive cabinet.
11.
Attach drain hose to the bottom fitting of the input inductor inside the drive cabinet.
12. Place the other end of the hoses in a suitable container for disposal of the trapped liquid.
13. Open the bottom valves of the input and output inductors to allow coolant to drain.
14. Install the coolant reservoir cap to prevent too much air from leaking out.
15. With hoses connected to the tube and shell heat exchanger and the inductors, place the other end of the hoses
in a suitable container for disposal of the trapped liquid and apply 5 PSI compressed air or nitrogen in the top
fitting on the output inductor to blow residual liquid out of the input and output inductor and heat exchanger.
WARNING: Do NOT exceed the 5 PSI rating. Damage to the cooling system my result.
Once coolant stops flowing turn off the air supply, close the valve, and remove drain hoses.
16. Close all valves and replace all caps.
17. System is now drained.
