SI0270 (219)
5
JOHNSON CONTROLS
5. Energize the drive with the 115VAC that was connected in step 2.
6. Start pumps by removing the J2 connector on the VSD Logic Board 031 03620 001.
7. Allow pumps to run for 10 minutes.
8. Disable the pumps by re-installing the J2 connector on the VSD Logic Board 031 03620 001.
9. Attach the drain hose to the GHT faucet valve on the bottom of the shell and tube heat exchanger.
10. Place the other end of hose in a suitable container for disposal of the trapped liquid.
11.
Open the heat exchanger valve to allow coolant to drain. Once coolant stops flowing close the valve.
12.
Repeat steps 4 – 11 until three (3) complete flush cycles are completed.
STEP 3: Fill Procedure (All PYT Model Drives)
WARNING: Coolants may foam up when cycled through the system or when the pumps are shut
off and the coolants tend to rise. Do not fill reservoir to top while unit is running or it may overflow
when pumps are shut off. If foaming is evident while filling with the inhibited solution, repeat the
FLUSHING PROCESS (ALL PYT MODEL DRIVES) and repeat as needed until no foaming is
present. Refer to previous diagrams for GHT locations on each drive size.
1.
Confirm that the heat exchanger drain valve is closed.
2. Remove the cap from the coolant reservoir.
3. Fill the coolant loop at the coolant reservoir. Pour the inhibitor or distilled water into the reservoir slowly to
minimize the foaming that may take place when filling with coolant.
4. Apply power to the chiller.
5. Start pumps by removing the J2 connector on the VSD Logic Board 031 03620 001.
6. Allow pumps to run for 15 seconds.
7. Disable the pumps by re-installing the J2 connector on the VSD Logic Board 031 03620 001.
8.
Check the fill pipe and add more inhibitor if needed to bring the level back to the within 2 inches from the top.
9. Start pumps by removing the J2 connector on the VSD Logic Board 031 03620 001.
10. Allow pumps to run for 5 minutes.
11. Disable the pumps by re-installing the J2 connector on the VSD Logic Board 031 03620 001.
12. Insure the drain valve is closed and remove the drain hose.
13. Remove the temporary 115VAC power wiring.
14. Remove all lockout devices.
15. The drive is ready for operation.
