HOT WATER TEMPERATURE FLUCTUATES / UNIT DEACTIVATED
1. Unbalanced pressure in waterlines
The added restriction caused by the 125 HX in the hot water system can result in uneven pressures between the cold and the hot. In such cases when mixing cold water at the tap, the lower hot water pressure may be overpowered by a much higher cold water pressure, which may cause the 125 HX burners to shut down. Make sure faucet aerators or shower heads are free of minerals. Do not add any flow restrictor to the shower head.
2. Temperature balance valves
If the inlet water temperature to the water heater is very warm the heater can produce temperatures that may be found to be too hot. A temperature balance shower valve can automatically mix in cold water to reduce such hot water temperature, in the event of any temperature instability with the use of a temperature balance shower valve, refer to shower valve manufactures instructions for internal adjustment setting. Adjustments should be made to the hottest setting in the shower valve. Additionally the temperature control of the heater can be adjusted to produce a more comfortable hot water temperature. See SETTING THE WATER TEMPERATURE section.
3.Cold water is mixing with the hot water between the 125 HX and the outlet
See #2 under “NO SPARK AT THE PILOT”.
4.Inlet water pressure is erratic due to inadequate supply water pressure or saturated pressure tank on well system
Check the inlet water pressure. For installation on a private well system with the use of a pressure tank, the lowest pressure range setting recommended is
5. Gas pressure is too low
See page 3 for correct specifications.
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