Bock Water heaters OT300-A Installation And Operation Instruction Manual page 32

SECTION IV: INSTALLATION (cont.)
WIRING
All electrical wiring and connections must be in accordance with local codes. In the absence
of local codes, wiring must conform to the National Electric Code ANSI/NFPA No. 70 or the
Canadian Electrical Code C22.1. This water heater must be electrically grounded. Electrical
power should be supplied through a fused disconnect switch located near the water heater.
Where local codes permit, use the supplied power cord for field connection. A grounding
receptacle is required. If local codes do not permit the use of the supplied cord, disconnect the
power cord from the junction box and replace with suitable power supply (120V, 60 Hz)
wiring and connections. The water heater draws less than 5 amps (maximum). Check for
proper polarity at the main power connection prior to operating the water heater.
Turn off or disconnect the electrical power supply to the water heater before servicing.
Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper operation (including limits and
safeties) after servicing.
Component and schematic wiring diagrams are shown in Figures 25 and 26.
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CAUTION
Figure 25: Component Wiring Diagram