Installation Guide

DIAGRAMS
Electric Tankless Water Heater • 29
WIRING DIAGRAMS
Relay 1
Relay 2
GRND
N
TH-IN
TH-AUX
TH-OUT
Moisture
Sense
Level
Detect
Element
L1
Control
Board
Ground
RED BLK
RED
BLK
RED BLK
GRN
RED
BLK
GRN
GRN
GRN
1 Chamber, 1 Element, 120 VAC
3-Pin Conn.
RED
BLK
GRN
USE COPPER CONDUCTORS ONLY WHEN
CONNECTING TO ELECTRICAL SERVICE.
Power
Supply
RED BLK
GRN
RED
BLK
Relay 1
Relay 2
TH-IN
TH-AUX
TH-OUT
Moisture
Sense
Level
Detect
Element
Control
Board
RED BLK
RED
BLK
RED BLK
GRN
RED BLK GRN
1 Chamber, 1 Element, 240/208 VAC
3-Pin Conn.
USE COPPER CONDUCTORS ONLY WHEN
CONNECTING TO ELECTRICAL SERVICE.
GRND
L2
L1
Ground
GRN
GRN
RED
BLK
GRN
Power
Supply
RED BLK
GRN
RED
BLK
The wiring diagrams for various models
are listed in this sec on. Locate the
one that corresponds with your model.
NOTICE: The correct wiring diagram for
your model can be found on the inside
of your water heater’s cover.
The wiring diagrams are listed as
follows:
• 1 Chamber, 1 Element, 120 VAC
(see below).
• 1 Chamber, 1 Element, 240/208
VAC (see below).
• 1 Chamber, 1 Dual Element,
240/208 VAC, p. 30.
• 1 Chamber, 1 Element, 277 VAC,
p. 30.
• 2 Chamber, 2 Element, 240/208
VAC (other than 16kW, 18kW, or
14kW/208V), p. 31.
• 2 Chamber, 2 Element, 240/208
VAC (16 kW, 18kW and
14kW/208V only), p. 32.
• 4 Chamber, 4 Element, 240/208
VAC, p. 33.
See also “Electrical Requirements” on
page 8.