Water Quality - Weil-McLain WM97+ Product Manual

CWH
companion water heater
Troubleshooting
Figure 23
Typical problems and causes and page location for details
Problem
Insufficient
hot water
Excessive
domestic water
temperature
Boiler relief valve
lifting or weeping
Temperature/
pressure relief
valve lifting
or weeping
Water on the
floor near the
tank
Top of tank or
enclosure wet

Water quality

problems
30
— Product Manual
(continued)
Check possible causes
1
Undersized water heater?
2
High-flow shower heads?
3
Boiler system improperly sized?
4
Check component parts.
5 Check boiler operating temperatures.
1
Boiler operating temperature set too
high?
2
Recirculation loop needed?
1
Undersized expansion tank?
2
Faulty boiler expansion tank?
3
Faulty boiler relief valve?
1
Undersized or missing domestic water
side expansion tank?
2
Faulty domestic water side expansion
tank?
3
Faulty T & P relief valve?
1
Check for leaks from sources other
than the water heater.
2
T & P relief valve lifting and discharg-
ing?
1 Check for leaks from sources other
than the water heater.
1
Water smells like "rotten eggs."
2 Milky water.
6
Check for air in the system.
7
Check tank temperature setting.
8
Check circulator speed.
9
Clean the boiler water system.
3
Thermostatic mixing valve set too
high?
4
No thermostatic mixing valve
installed or mixing valve is defec-
tive?
4
Faulty boiler fill valve?
5
Tank heat exchanger coil leaking?
4
High domestic water supply pres-
sure?
5
Possible water hammering or
pressure spikes?
6
Boiler operating temperature too
high?
3
Loose piping connections or
drain valve leaking?
2 Loose piping connections?
3
Discolored water from the hot
water faucet.
Part number 635-500-156/0113
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