Trebor Quantum Series Di Water Heater - Manual (Page 33)

QUANTUM DI HEATER OPERATION / MAINTENANCE MANUAL PAGE 33
6 SHUT DOWN
The DI water heater may be shut down by the following methods:
Select the OFF button on the control screen to put the heater in
standby (heater element power will be disengaged).
Rotate “Main Breaker” to off position.
Turn off the facility supply.
Lockout and tagout heater for maintenance or repair. Refer to
Section 2.5.