Hypertherm HPR800XD Auto Gas Rev.2 - Manual (Page 248)

Maintenance
5-34 HPR800XD Auto Gas – 806500
coolant system servicing
Draining the coolant system
1. Turn OFF all power to the plasma system and the chiller.
2. Drain the coolant from the chiller. A 3/4 inch female NPT connection is located at the bottom of the sight glass for
draining the coolant from the chiller reservoir. The connection should be piped to a drain or receptacle positioned
lower than the bottom of the reservoir. If a receptacle is used it must be large enough to hold all the coolant in the
chiller 60.5 lpm (16 gal).
3. Remove the return coolant hose (red tape on the hose) from the rear of the chiller and put it in a 20 liter (5 gallon)
container.
Sight glass
3/4 inch female NPT
connection
Return
coolant hose