Manual

- 25 -
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 T-K3-
OS/SP 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. (p. 30)
The water is not hot enough.
• Compare the flow and temperature. See the chart
on p. 38.
• Check cross plumbing between cold water lines
and hot water lines.
• Is the gas supply valve fully open? (p. 20)
• Is the gas line sized properly? (p. 15)
• Is the gas supply pressure enough? (p. 14)
• Is the set temperature set too low? (p. 21, 23)
The water is too hot.
• Is the set temperature set too high? (p. 21, 23)
The hot water is not available when
a fixture is opened.
• Make sure the unit gets 120V 60Hz power supply.
• If you are using the remote controller, is the power
button turned on? (p. 21)
• Is the gas supply valve fully open? (p. 20)
• Is the water supply valve fully open? (p. 20)
• Is the filter on cold water inlet clean? (p. 24)
• Is the hot water fixture sufficiently open to draw at
least 0.5 GPM through the water heater? (p. 21)
• Is the unit frozen?
• Is there enough gas in the tank? (for LP)
The hot water turns cold and stays
cold.
• Is the flow rate enough to keep the T-K3-OS/SP
running? (p. 21)
• If there is a recirculation system installed, does the
recirculation line have enough check valves?
• Is the gas supply valve fully open? (p. 20)
• Is the filter on cold water inlet clean? (p. 24)
• Are the fixtures clean of debris and obstructions?
Fluctuation in hot water temperature.
• Is the filter on cold water inlet clean? (p. 24)
• Is the gas line sized properly? (p. 15)
• Is the supply gas pressure enough? (p. 14)
• Check for cross connection between cold water
lines and hot water lines.