Installation Guide

GENERAL INFO
Electric Tankless Water Heater • 9
Point-of-Use Models
(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
*P**-40-Y5 20 277 1 4 14.44 12 Single
*P**-60-Y5 25 277 1 6 21.66 10 Single
*P**-73-Y5 30 277 1 7.3 26.35 10 Single
*P**-90-Y5 40 277 1 9 32.49 8 Single
*
All wiring/conductors must be rated for 90°C or greater.
† Maximum recommended wire size is #6 cu AWG.
‡ This model may used with a 208 VAC supply. Use of 208 VAC may require different breaker and/or wire sizes.
Follow all code requirements.
Two-Chamber Models
(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
*2**-140-X5
40 amps each
(2 circuits)
208 2 7 33.65 8 Single
*2**-120-E5
60 amps 240 2 6.1 50 6
†
Single
*2**-140-E5
60 amps 240 2 7 58.34 6
†
Single
*2**-160-E5
40 amps each
(2 circuits)
240 2 8 33.33 8 Single
*2**-180-E5
40 amps each
(2 circuits)
240 2 9 37.5 8 Single
*
All wiring/conductors must be rated for 90°C or greater.
† Maximum recommended wire size is #6 cu AWG.