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AQUA PLUS indirect-fired water heaters — Product Manual
Troubleshooting
(continued)
Insufficient
hot water
1 Undersized water heater?
2 Boiler system improperly sized?
3 Check component parts.
4 Check boiler operating tempera-
tures.
5 Check location of flow control
devices.
6 Check for air in the system.
7 Clean the boiler water system.
8 Check tank thermostat setting.
29
Excessive
domestic water
temperature
1 Reduce stacking
• Lower boiler operating tempera-
ture.
2 Install a thermostatic mixing valve.
3 Install a recirculation loop.
32
Boiler relief valve
lifting or weeping
1 Undersized expansion tank?
2 Faulty boiler expansion tank?
3 Faulty boiler relief valve?
4 Faulty boiler fill valve?
33
Temperature/
pressure relief
valve lifting
or weeping
1 Undersized or missing domestic
water side expansion tank?
2 Faulty domestic water side expan-
sion tank?
3 Faulty T & P relief valve?
4 High domestic water supply pres-
sure?
5 Possible water hammering or pres-
sure spikes?
6 Check boiler operating tempera-
ture.
34
Water on the
floor near the
tank
1 Check for leaks from sources other
than the water heater.
2 T & P relief valve lifting and dis-
charging?
3 Loose piping connections?
35
Top of tank or
insulation wet
1 Check for leaks from sources other
than the water heater.
2 Loose piping connections?
35
Water quality
problems
1 Water smells like “rotten eggs.”
2 Milky water.
3 Discolored water from the hot
water faucet.
37
Figure 23 Typical problems and causes and page location for details
Problem Check possible causes Page
Part number GL-E223-ADOC 0311
28