Use and Care Manual

4 | P a g e
ELECTRICAL INSTALLATION:
1. Connect power supply wires appropriately sized and protected by double pole (208-240v) or single pole
(277v) circuit breakers to the input terminals on the heater (hard wired) as shown in the Figure 2 wiring
diagrams below. Refer to Table 1 above on Page 1 for the voltage, amp and phase ratings of the supply
power.
2. Ensure wires are connected to the respective relay terminals.
3. Ensure water inlet/outlet valves are both open.
4. Turn on circuit breaker. Turn on water flow. Carefully ensure the red LED is illuminated at each circuit
board module. The unit is almost ready for use. Shut off circuit breaker.
5. Install cover. Install the (4) cover mounting screws. Turn on circuit breaker. Unit is now ready for use.
6. Local plumbing and electrical codes must be followed in this installation of water heater and the
accessories. Failure to comply with code requirements voids warranty.
7. Temperature adjustment potentiometer is standard equipment on (L) Low Activation and (S) Standard
Activation models.
Figure 2 - Wiring Connections
208-240v Module Units 277v Module Units
A=L1 (Black) B=L2 (Red) A=L1 (Black) B=N (Grey)