Installation Guide

GENERAL INFO
10 • Electric Tankless Water Heater
Four-Chamber Models (Single Phase)
For potable water heating only. Not for space heating.
NOTICE: Models sorted by
Voltage, then by Wattage per Element.
Model Recommended
Breaker Size
(Amps)
Voltage Number of
Elements
Wattage per
Element (KW)
Current per
Breaker
(Amps)
Recommended
Wire Size
*
(AWG)
Element
Type
*4**-280-X5 70 amps each
(2 cirucits)
208 4 7 67.31
6
†
Single
*4**-180-E5 40 amps each
(2 circuits)
240 4 4.5 37.50 8 Single
*4**-220-E5 50 amps each
(2 circuits)
240 4 5.5 45.83 6 Single
*4**-240-E5 60 amps each
(2 circuits)
240 4 6 50.00
6
†
Single
*4**-280-E5 60 amps each
(2 circuits)
240 4 7 58.33
6
†
Single
*4**-320-E5 70 amps each
(2 circuits)
240 4 8 66.67
6
†
Single
*
All wiring/conductors must be rated for 90°C or greater.
† Maximum recommended wire size is #6 cu AWG.