John Wood Takagi - 710 - Manual (Page 23)

23
GENERAL TROUBLESHOOTING
Temperature And Amount Of Hot Water
PROBLEM POSSIBLE SOLUTIONS
It takes long time to get hot
water at the fixtures. • The time it takes to deliver hot water from the water heater to your fixtures depends on
the length of piping between the two. The longer the distance or the bigger the pipes,
the longer it will take to get hot water.
• If you would like to receive hot water to your fixtures quicker, you may want to consider
a hot water recirculation system. (pg. 29)
The water is not hot
enough. • Compare the flow and temperature. See the chart on pg. 40.
• Check cross plumbing between cold water lines and hot water lines.
• Is the gas supply valve fully open? (pg. 19)
• Is the gas line sized properly? (pg. 10)
• Is the gas supply pressure enough? (pg. 10)
• Is the set temperature set too low? (pg. 19-20)
The water is too hot. • Is the set temperature set too high? (pg. 19-20)
The hot water is not avail-
able when a fixture is
opened. • Make sure the unit has 120VAC / 60Hz power supply.
• If you are using the remote controller, is the power button turned on? (pg. 20)
• Is the gas supply valve fully open? (pg. 19)
• Is the water supply valve fully open? (pg. 19)
• Is the filter on cold water inlet clean? (pg. 22)
• Is the hot water fixture sufficiently open to draw at least 1.9 l/min (0.5 GPM (US))
through the water heater? (pg. 21)
• Is the unit frozen?
• Is there enough gas in the tank? (for LP)
The hot water gets cold and
stays cold. • Is the flow rate enough to keep the water heater running? (pg. 21)
• If there is a recirculation system installed, does the recirculation line have enough check
valves?
• Is the gas supply valve fully open? (pg. 19)
• Is the filter on cold water inlet clean? (pg. 22)
• Are the fixtures clean of debris and obstructions?
Fluctuation in hot water
temperature. • Is the filter on cold water inlet clean? (pg. 22)
• Is the gas line sized properly? (pg. 10)
• Is the supply gas pressure enough? (pg. 10)
• Check for cross connection between cold water lines and hot water lines.
Water Heater
PROBLEM POSSIBLE SOLUTIONS
Unit does not ignite when
water goes through the unit. • Is the flow rate over 1.9 l/min (0.5 GPM (US))? (pg. 21)
• Check for the filter on cold water inlet. (pg. 22)
• Check for reverse connection and cross connection.
• If you use the remote controller, is the power button turned on? (pg. 20)
The fan motor is still spin-
ning after operation has
stopped. • This is normal. After operation has stopped, the fan motor keeps running for 35 seconds
in order to re-ignite quickly, as well as push all exhaust gas out of the flue.
Abnormal sounds come
from the unit. • Contact the manufacturer at 1-877-737-2840.