25
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-4. Gas valve assembly
Part#
ͻഩϯϭϵϭϰϯͲϱϭϱ;<ϭϴϭͿ͗WƌŽƉĂŶĞ
ͻഩϯϭϵϭϰϯͲϱϭϲ;<ϭϴϮͿ͗EĂƚƵƌĂůŐĂƐ
Unit Part#
Included in
#102
Function
KƉĞŶƐĂŶĚĐůŽƐĞƐƚŚĞŐĂƐƉĂƚŚǁĂLJƐŽĨƚŚĞǁĂƚĞƌŚĞĂƚĞƌ;ŵĂŝŶĂŶĚƐŽůĞŶŽŝĚ
gas valves)
DŽĚƵůĂƚĞƐƚŚĞŐĂƐĨůŽǁĨƌŽŵƚŚĞŐĂƐŝŶůĞƚ;ƉƌŽƉŽƌƚŝŽŶĂůŐĂƐǀĂůǀĞͿ
Failure events
ϭ͘'ĂƐůĞĂŬĨƌŽŵƚŚĞǀĂůǀĞƐ͘
Ϯ͘hŶĂďůĞƚŽŽƉĞŶͬĐůŽƐĞ;ŵĂŝŶĂŶĚƐŽůĞŶŽŝĚŐĂƐǀĂůǀĞƐͿ
ϯ͘hŶĂďůĞƚŽŵŽĚƵůĂƚĞƚŚĞŐĂƐĨůŽǁ;ƉƌŽƉŽƌƚŝŽŶĂůŐĂƐǀĂůǀĞͿ
Effects on the water heater
if valves fails
ϭ͘'ĂƐůĞĂŬĨƌŽŵƚŚĞĂƐƐĞŵďůLJ͘
Ϯ͘džĐĞƐƐĐĂƌďŽŶŵŽŶŽdžŝĚĞĞŵŝƐƐŝŽŶƐͬ͘EŽĨůĂŵĞƐ͘
ϯ͘>ĂĐŬŽĨǁĂƚĞƌƚĞŵƉĞƌĂƚƵƌĞĐŽŶƚƌŽů͘
Error codes when
the fvalves fails
101 111 121 991
Diagnostic
ϭ͘sŝƐƵĂůŝŶƐƉĞĐƚŝŽŶ͗ĐŽŶŶĞĐƚŝŽŶͬďƌĞĂŬĂŐĞŽĨǁŝƌĞƐ͘
Ϯ͘>ŝƐƚĞŶĨŽƌΗĐůƵŶŬΗƐŽƵŶĚƐĨƌŽŵƚŚĞŐĂƐǀĂůǀĞƐŽƉĞŶŝŶŐƌŝŐŚƚĂĨƚĞƌĨĂŶ
motor initiates.
ϯ͘ŚĞĐŬǀŽůƚĂŐĞƐĂŶĚƌĞƐŝƐƚĂŶĐĞŽĨĐŽŝůƐ͖ƉƌŽƉĞƌƌĂŶŐĞŽĨǀĂůƵĞƐƐŚŽǁŶ
below.
Color / Number of wires
ůƵĞͲ>ŝŐŚƚďůƵĞ;DsͿ
ϵϯƚŽϭϮϬs;ĚƵƌŝŶŐŽƉĞƌĂƚŝŽŶͿͬ
ϭ͘ϯϱƚŽϭ͘ϲϱŬɏ
Check
point
C
Blue - Green (SV
1
)
ϵϯƚŽϭϮϬs;ĚƵƌŝŶŐŽƉĞƌĂƚŝŽŶͿͬ
ϭ͘ϯϱƚŽϭ͘ϲϱŬɏ
Blue - Orange (SV
2
)
ϵϯƚŽϭϮϬs;ĚƵƌŝŶŐŽƉĞƌĂƚŝŽŶͿͬ
ϭ͘ϯϱƚŽϭ͘ϲϱŬɏ
Blue - Red (SV
3
)
ϵϯƚŽϭϮϬs;ĚƵƌŝŶŐŽƉĞƌĂƚŝŽŶͿͬ
Ϯ͘ϬϳƚŽϮ͘ϱϯŬɏ
White - Red
(Proportional valve)
ϭ͘ϬƚŽϭϱs;ĚƵƌŝŶŐŽƉĞƌĂƚŝŽŶͿͬ
ϮϬƚŽϰϬɏ
ϯϭϵϭϰϯͲϱϭϱ ;<ϭϴϭͿ ĨŽƌ WƌŽƉĂŶĞ ŵŽĚĞů ĂŶĚ ϯϭϵϭϰϯͲϱϭϲ
;<ϭϴϮͿ ĨŽƌ EĂƚƵƌĂů ŐĂƐ ŵŽĚĞů ŝƐ ĂŶ ĂƐƐĞŵďůLJ ŽĨ ƚŚĞ ŐĂƐ
ŵĂŶŝĨŽůĚ ǁŝƚŚ ŐĂƐ ǀĂůǀĞ ĂƐƐĞŵďůLJ͘ &Žƌ ƐĂĨĞƚLJ ƌĞĂƐŽŶƐ͕
these assemblies should be installed in the unit as a whole
set. The diagram below shows the gas valve assembly.
Proportional Valve
2-3/4" (70 mm)
3-3/4" (93 mm)
4-3/8" (112 mm)
1-3/4" (46 mm)
5-1/4" (134 mm)
Gas valve
WƌŽƉŽƌƟŶĂůǀĂůǀĞ
^ŽůĞŶŽŝĚǀĂůĂǀĞ
DĂŝŶŐĂƐǀĂůĂǀĞ
4-1/2" (112.8 mm)