Rheem Raypak B-195 Operating And Installation Instructions page 11

LADDER DIAGRAM
CONNECTION DIAGRAM
DANGER: SHOCK HAZARD
Turn off electrical power to boost heater before servicing any
component in the heater to prevent equipment damage or
personal injury.
NOTE:
If it is necessary to replace any of the original wiring, it
must be replaced with 105°C rated wire or its equivalent.
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