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5. Cold water is mixing with the hot water
between the AquaStar and the outlet
Compare water temperature at outlet of AquaStar
and at the tap. Check for automatic mixing valve
plumbing crossover (see #6 - MAIN BURNERS
DO NOT IGNITE WHEN HOT WATER IS ON).
6. Parts in water flow valve (#34343) are
corroded
The gas valve will not open fully if water valve
parts are corroded. Replace all three parts in
water valve (#32570, #21107, #34542).
HOT WATER TEMPERATURE FLUCTUATES
1. Temperature setting is too high
Setting the temperature too high will make it nec-
essary to add a great deal of cold water to make
the temperature safe and comfortable for contact
with the skin. Adding cold to the hot water flow at
the tap reduces the flow of water through the
AquaStar causing the thermostat to reduce the
Btu input or the water valve to shut off if the flow
through the AquaStar falls below 3/4 gallon/
minute. We recommend setting the temperature
selector dial on #4 or #5. See section on Setting
Water Temperature, Page 12.
2. Unbalanced pressure in water lines
The added restriction caused by theAquaStar in
the hot water system can result in uneven pres-
sures 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 presure, which may cause the
AquaStar burners to shut down. Make sure fau-
cet aerators or shower heads are free of miner-
als. Check that the flow restrictor and filter of the
AquaStar are clean
3. Cold water is mixing with the hot water
between the AquaStar and the outlet
Compare water temperature at outlet of the
AquaStar with the temperature at the tap. If dif-
ferent, check for automatic mixing valve or plumb-
ing crossover (see #6, MAIN BURNERS WILL
NOT IGNITE) Where automatic "anti-scald"
valves are required by code, lower the tempera-
ture setting on the AquaStar as much as possible
and balance the pressure betwen cold and hot
water after the AquaStar.
4. Inlet water pressure is erratic due to inad-
equate supply water pressure or saturated
pressure tank on well system
Check the inlet water pressure and correct if nec-
essary.
Fig. 6 Temperature/Flow Chart AquaStar 80
FLOWS IN GALLONS PER MINUTE -based on ground water temperature of 55ºF
*Range described above will be lower if inlet temperature is below 55ºF
Temperature chart of hot water
at different flow rates with
selector on position 8 ______
and position 2 _ _ _ _ _ _ _ _
1.0
1.5
2.0
2.5
3.0 3.5
F°
155
150
145
140
135
130
125
120
115
110
105
100
95
90
85
HOT WATER TEMPERATURE