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Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-11. Bypass valve (540 (T-H3)
models only)
Part #
ͻഩϯϭϵϭϰϯͲϰϲϰ;<ϱϴͿ
540 (T-H3) models only
Unit Part#
#403
Function
ϭ͘DŝdžĞƐŚŽƚǁĂƚĞƌĨƌŽŵƚŚĞŚĞĂƚĞdžĐŚĂŶŐĞƌǁŝƚŚĐŽůĚǁĂƚĞƌĨƌŽŵƚŚĞǁĂƚĞƌ
inlet in order to modulate and control the water heater’s outlet water
temperature.
Ϯ͘<ĞĞƉƐƚŚĞǁĂƚĞƌƚĞŵƉĞƌĂƚƵƌĞŝŶƚŚĞŚĞĂƚĞdžĐŚĂŶŐĞƌƐƚĂďůĞ͕ƉƌĞǀĞŶƚŝŶŐ
low-temperature corrosion by reducing condensation buildup in heat
ĞdžĐŚĂŶŐĞƌ͘
Failure events
ϭ͘tĂƚĞƌůĞĂŬĂŐĞĨƌŽŵǀĂůǀĞ͘
2. The valve cannot modulate properly.
Effects on the water heater
if bypass valve fails
ϭ͘tĂƚĞƌůĞĂŬĂŐĞĨƌŽŵĨĂŝůĞĚǀĂůǀĞĐĂŶĚĂŵĂŐĞŽƚŚĞƌǁĂƚĞƌŚĞĂƚĞƌ
components.
Ϯ͘dĞŵƉĞƌĂƚƵƌĞĨůƵĐƚƵĂƚŝŽŶƐŝŶƚŚĞŚŽƚǁĂƚĞƌŽƵƚƉƵƚ͘
Error codes when bypass
valve fails
N/A
Diagnostic
ϭ͘sŝƐƵĂůŝŶƐƉĞĐƚŝŽŶ͗ĐŽŶŶĞĐƚŝŽŶͬďƌĞĂŬĂŐĞŽĨǁŝƌĞƐ͘
Ϯ͘ŚĞĐŬǀŽůƚĂŐĞƐĂŶĚƌĞƐŝƐƚĂŶĐĞ͗ƉƌŽƉĞƌƌĂŶŐĞŽĨǀĂůƵĞƐƐŚŽǁŶďĞůŽǁ͘
Color / Number of wires
Brwon - Red
ϯ͘ϬƚŽϭϭsĂŶĚϱϬƚŽϴϱɏ
Checkpoint
J1
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
>PS+SPS-GF<
2-1/2" (66 mm)
3-3/8" (84 mm)
1-7/8" (47 mm)
BYPASS
WATER IN
BYPASS
WATER OUT
Bypass
valve
BYPASS
WATER IN
BYPASS
WATER OUT
