Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger - Manual (Page 31)

Operation 2-5
PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Publication 20L-UM002A-EN-P
7. After flow stops, push the PRIME SWITCH for 8 seconds to open the
motorized valve (see Figure 2.2 ).
8. Clean off any old thread sealer from inside the pipe located on the heat
exchanger and the removed plug.
9. Apply PTFE (Teflon
®
) thread sealing tape or pipe thread sealant
compound to threads on the plug.
10. Use a 9/16 inch or adjustable wrench to reinstall the plug to the
“SUPPLY DRAIN” pipe on the front of the heat exchanger. (There is no
need to use a backup wrench on the pipe nipple.)
11. Tighten the connections on the rear of the heat exchanger marked “IN
FROM SUPPLY” and “RETURN TO SUPPLY” using the tools and
method outlined in
Connecting Hoses to the Heat Exchanger on
page 1-6 .
12. Turn on flow to “IN FROM SUPPLY” connection.
13. Dispose used fluid according to local, state, and federal regulations.
Draining Coolant from the
Drive Loop for Periodic
Replacement
1. Disconnect power from the heat exchanger.
2. Remove the fill tube cap from the top of the tank.
3. Place a 5 gallon container under the pipe marked “DRIVE DRAIN” on
the front of the heat exchanger ( Figure 2.1 ).
4. Use a 9/16 inch or adjustable wrench to remove the plug from the
“DRIVE DRAIN” pipe. (There is no need to use a backup wrench on
the pipe nipple.)
5. Allow the coolant to drain.
6. After flow stops, disconnect the hoses on the rear of the heat exchanger
marked “TO DRIVE INLET” and “FROM DRIVE OUTLET” using the
tools and method outlined in
Connecting Hoses to the Heat
Exchanger on page 1-6 . Place the ends of the hoses in a container to
drain.
7. Clean off any old thread sealer from inside the pipe located on the heat
exchanger and the removed plug.
!
ATTENTION: Risk of equipment damage exists. Pressing the
PRIME SWITCH longer than 20 seconds may damage the pump
if the drive loop is already drained.
!
ATTENTION: Risk of equipment damage exists. It is
recommended to drain the supply side before draining the drive
side to avoid any possible damage to the pump.