83
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
12-14. Adjusting manifold gas pressure
dŚĞŵĂŶŝĨŽůĚŐĂƐƉƌĞƐƐƵƌĞŽŶƚŚĞǁĂƚĞƌŚĞĂƚĞƌĐĂŶďĞĂĚũƵƐƚĞĚďLJĨŽůůŽǁŝŶŐƚŚĞƉƌŽĐĞĚƵƌĞƐďĞůŽǁ͘
Adjusting maximum manifold pressure
ϭ͘ŶƐƵƌĞƚŚĂƚǁĂƚĞƌŚĞĂƚĞƌŝƐŶŽƚŝŶŽƉĞƌĂƚŝŽŶ͘
Ϯ͘ZĞŵŽǀĞƚŚĞƐĐƌĞǁŽĨĨƚŚĞŵĂŶŝĨŽůĚƉŽƌƚŽĨƚŚĞǁĂƚĞƌŚĞĂƚĞƌ͘;&ŝŐ͘ϭͿ
ϯ͘ŽŶŶĞĐƚĂŵĂŶŽŵĞƚĞƌƚŽƚŚĞŵĂŶŝĨŽůĚƉŽƌƚƵƐŝŶŐĂƚƵďĞ;&ŝŐ͘ϮͿ͘ŶƐƵƌĞƚŚĂƚƚŚŝƐĐŽŶŶĞĐƚŝŽŶŝƐ
secure enough to prevent gas leak.
ϰ͘ZƵŶǁĂƚĞƌƚŚƌŽƵŐŚƚŚĞǁĂƚĞƌŚĞĂƚĞƌƚŽĂĐƚŝǀĂƚĞŝƚƐŽƉĞƌĂƚŝŽŶ͘/ĨƉƌĞƐĞŶĐĞŽĨĂŐĂƐůĞĂŬŝƐĚĞƚĞĐƚĞĚ͕
ŝŵŵĞĚŝĂƚĞůLJƐŚƵƚŽĨĨƚŚĞǁĂƚĞƌŚĞĂƚĞƌĂŶĚŝŶƐƉĞĐƚƚŚĞƚƵďĞͬŵĂŶŝĨŽůĚĐŽŶŶĞĐƚŝŽŶ͖ŽƚŚĞƌǁŝƐĞ͕
ƉƌŽĐĞĞĚŽŶƚŽƚŚĞŶĞdžƚƐƚĞƉ͘
5. Press and hold down the
“MAX”
ďƵƚƚŽŶŽŶƚŚĞĐŽŵƉƵƚĞƌďŽĂƌĚ͘tŚŝůĞŚŽůĚŝŶŐĚŽǁŶƚŚĞ͞Dy͟
button, press either the
“Increase”
or
“Decrease”
ďƵƚƚŽŶƚŽŝŶĐƌĞĂƐĞŽƌĚĞĐƌĞĂƐĞƚŚĞŵĂŶŝĨŽůĚŐĂƐ
ƉƌĞƐƐƵƌĞ͕ƌĞƐƉĞĐƚŝǀĞůLJ;&ŝŐ͘ϯͿ͘ZĞĨĞƌƚŽƚŚĞŵĂŶŽŵĞƚĞƌƚŽǀĞƌŝĨLJƚŚĂƚƉƌĞƐƐƵƌĞŚĂƐďĞĞŶƐĞƚƚŽ
desired value.
ϲ͘ĨƚĞƌŐĂƐƉƌĞƐƐƵƌĞŚĂƐďĞĞŶƐĞƚ͕ĚĞĂĐƚŝǀĂƚĞƚŚĞǁĂƚĞƌŚĞĂƚĞƌ͕ƌĞŵŽǀĞƚŚĞŵĂŶŽŵĞƚĞƌƚƵďĞ͕ĂŶĚ
replace the port screw.
Adjusting minimum manifold pressure
ϭ͘ŶƐƵƌĞƚŚĂƚǁĂƚĞƌŚĞĂƚĞƌŝƐŶŽƚŝŶŽƉĞƌĂƚŝŽŶ͘
Ϯ͘ZĞŵŽǀĞƚŚĞƐĐƌĞǁŽĨĨƚŚĞŵĂŶŝĨŽůĚƉŽƌƚŽĨƚŚĞǁĂƚĞƌŚĞĂƚĞƌ͘;&ŝŐ͘ϭͿ
ϯ͘ŽŶŶĞĐƚĂŵĂŶŽŵĞƚĞƌƚŽƚŚĞŵĂŶŝĨŽůĚƉŽƌƚƵƐŝŶŐĂƚƵďĞ;&ŝŐ͘ϮͿ͘ŶƐƵƌĞƚŚĂƚƚŚŝƐĐŽŶŶĞĐƚŝŽŶŝƐ
secure enough to prevent gas leak.
ϰ͘ZƵŶǁĂƚĞƌƚŚƌŽƵŐŚƚŚĞǁĂƚĞƌŚĞĂƚĞƌƚŽĂĐƚŝǀĂƚĞŝƚƐŽƉĞƌĂƚŝŽŶ͘/ĨƉƌĞƐĞŶĐĞŽĨĂŐĂƐůĞĂŬŝƐĚĞƚĞĐƚĞĚ͕
ŝŵŵĞĚŝĂƚĞůLJƐŚƵƚŽĨĨƚŚĞǁĂƚĞƌŚĞĂƚĞƌĂŶĚŝŶƐƉĞĐƚƚŚĞƚƵďĞͬŵĂŶŝĨŽůĚĐŽŶŶĞĐƚŝŽŶ͖ŽƚŚĞƌǁŝƐĞ͕
ƉƌŽĐĞĞĚŽŶƚŽƚŚĞŶĞdžƚƐƚĞƉ͘
5. Press and hold down the
“MIN”
ďƵƚƚŽŶŽŶƚŚĞĐŽŵƉƵƚĞƌďŽĂƌĚ͘tŚŝůĞŚŽůĚŝŶŐĚŽǁŶƚŚĞ͞D/E͟
button, press either the
“Increase”
or
“Decrease”
ďƵƚƚŽŶƚŽŝŶĐƌĞĂƐĞŽƌĚĞĐƌĞĂƐĞƚŚĞŵĂŶŝĨŽůĚŐĂƐ
ƉƌĞƐƐƵƌĞ͕ƌĞƐƉĞĐƚŝǀĞůLJ;&ŝŐ͘ϯͿ͘ZĞĨĞƌƚŽƚŚĞŵĂŶŽŵĞƚĞƌƚŽǀĞƌŝĨLJƚŚĂƚƉƌĞƐƐƵƌĞŚĂƐďĞĞŶƐĞƚƚŽ
desired value.
ϲ͘ĨƚĞƌŐĂƐƉƌĞƐƐƵƌĞŚĂƐďĞĞŶƐĞƚ͕ĚĞĂĐƚŝǀĂƚĞƚŚĞǁĂƚĞƌŚĞĂƚĞƌ͕ƌĞŵŽǀĞƚŚĞŵĂŶŽŵĞƚĞƌƚƵďĞ͕ĂŶĚ
replace the port screw.
WARNING
ĚũƵƐƚŝŶŐ ƚŚĞ ŵĂŶŝĨŽůĚ ƉƌĞƐƐƵƌĞ ĐĂŶ ĐĂƵƐĞ ƵŶĞdžƉĞĐƚĞĚ ĐŽŵďƵƐƚŝŽŶ ĐŽŶĚŝƚŝŽŶƐ
during operation, which can cause a health hazard, damage the water heater,
ĂŶĚͬŽƌ ƐŚŽƌƚĞŶ ŝƚƐ ůŝĨĞƐƉĂŶ͘ dŚĞƌĞĨŽƌĞ͕ ĐŚĂŶŐŝŶŐ ƚŚĞ ŵĂŶŝĨŽůĚ ƉƌĞƐƐƵƌĞ ŝƐ ŶŽƚ
recommended unless there are very strong reasons to do so (e.g. high elevation
ŝŶƐƚĂůůĂƚŝŽŶƐͿ͕ĂŶĚǁŝƚŚƚŚĞĐŽŶƐƵůƚĂƚŝŽŶŽĨƚŚĞdĞĐŚŶŝĐĂů^ĞƌǀŝĐĞƐĞƉĂƌƚŵĞŶƚ͘