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Heating System Maintenance – Steam
Troubleshooting
In a pumped hot water, or hydronic, system, heat is produced in
a boiler. This heat is distributed throughout the house by hot water
that is pumped to radiators or coils in the different rooms.
Periodic maintenance of your steam heating system keeps it running
properly. Heating and air conditioning experts suggest either you or a professional regularly check
the safety valve, steam pressure gauge, and water level gauge. Also
be sure to have your burner and thermostat inspected. Maintenance
you can perform includes the following.
Safety Valve
Located on top of the boiler, the safety valve allows steam to
escape if the pressure in the boiler exceeds safe levels. Test the
valve every month during the heating season by depressing the handle
(stand clear of valve pipe). If steam doesn't come out, have the
valve replaced by a professional.
Steam Pressure Gauge
Check that the pressure of the steam in the boiler as shown on
the gauge is within normal bounds (2 to 10 pounds per square inch
[psi]). If not, shut off the boiler at once and contact a professional
for service.
Water Level Gauge
- Once a month, open the valves at each end of the sight glass in the gauge.
- The water level should be in the middle of the glass (be sure
to close the valves after checking).
- If water is not visible, immediately shut off the boiler and let it cool.
- Then, unless your system has an automatic water fill valve,
add water by opening the fill valve on the water inlet pipe.
- If it has the automatic fill valve, contact a professional.
Cleaning or Replacing Sight Glass
To remove the sight glass in the water level gauge for either cleaning
or replacement:
- Shut off the valves.
- Undo the collar nuts at each end of the glass.
- Install new gaskets when you reassemble the unit.
Gas Burners
Gas burners are used to fuel warm-air, hot water, or steam heating
systems. For maintenance ideas on this vital part of your system,
click here.
If you are at all unsure about your ability to accomplish these
maintenance responsibilities, use a professional.
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