Installation / Operation Instruction Manual

24
Servicing Guide continued-
Electrical Door Lock:
An electrical door lock is offered in order to secure the access to the
water heater control cabinet. This device will lock the control cabinet
door when the 120VAC control circuit voltage is applied to it.
Note: Once the door is opened, the water heater can be re-energized, if
necessary, for service diagnosis.
Power Circuit Description:
The Power Circuit Wiring Diagram illustrates the electrical connections
from the incoming power supply through the circuit to the electrical
elements. The pow er circuits are available with internal circuit fusing
and without internal circuit fusing.
Refer to the water heater pow er circuit w iring diagram attached to the
inside panel of the control cabinet for the specific connections of the
water heater being serviced. The power circuit components and
supporting information that appear on the wiring diagram include the
following:
• Field wiring connection via terminal block or other connection
point
• Fuse block with amperage ratings displayed (when provided)
• Contactors with amperage ratings displayed
• Electrical elements w ith voltage and w attage ratings displayed
• Water heater total amperage draw is displayed