Bypass Valve - A.O. Smith 240 T-H3J Service Manual

10-11. Bypass valve (540 (T-H3) models only)
Part #
Function
Failure events
Effects on the water heater
if bypass valve fails
Error codes when bypass
valve fails
Diagnostic
Color / Number of wires
The physical appearance of the bypass valve is similar to that of the flow adjustment valve.
However, their functions differ and cannot be substituted for each other
Bypass
valve
BYPASS
WATER IN
BYPASS
WATER OUT
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
540 (T-H3) models only
inlet in order to modulate and control the water heater's outlet water
temperature.
low-temperature corrosion by reducing condensation buildup in heat
2. The valve cannot modulate properly.
components.
Brwon - Red
BYPASS
WATER OUT
34
Page
Unit Part#
N/A
Checkpoint
BYPASS
WATER IN
CONFIDENTIAL
Ver. 1.00
#403
J1
2-1/2" (66 mm)
1-7/8" (47 mm)