7 | EG, PEG, EGH |
|
Final adjustments
Water treatment
Do not use
Continual fresh
In hard water areas or low pH conditions (less than 7.0) consult local water treatment company.
Freeze protection (when used):
Use antifreeze especially made for hydronic systems.
Inhibited propylene glycol is recommended.
Do not use automotive, ethylene glycol or undiluted antifreeze. Severe personal injury, death or substantial property damage can result.
50% solution provides protection to about
Local codes may require
Determine quantity according to system water content. Boiler water content is listed on page 27. Remember to add in expansion tank water content.
Follow antifreeze manufacturer’s instructions.
Filling water systems
1.Close manual air vents, drain cock, and automatic air vent, if used.
2.Fill to correct system pressure. Correct pressure will vary with each application. Residential systems are often designed for 12 pounds of cold fill pressure.
3.Open automatic air vent one turn, if used.
4.Open manual water feed valve.
a)Starting on lowest floor, open air vents one at a time until water squirts out. Close vent.
b)Repeat with remaining vents.
5.Close manual water feed valve when correct boiler pressure is reached.
6.If purge valve is used - located in the return piping above isolation valve:
a)Connect hose to purge valve.
b)Close isolation valve. Open purge valve.
c)Open hand water feed valve and allow system to purge all air. If system has more than one circuit, purge each circuit separately by opening each balancing valve one at a time.
d)Close purge valve and water feed valve cock.
e)Open isolation valve.
f)Fill system to correct pressure.
Filling steam boilers
1.Do not fill (except for leakage tests) until boiler is ready to be fired.
2.Fill to normal waterline, halfway up gauge glass.
3.Boiler water pH 7.0 to 8.5 is recommended.
4.Follow skimming procedure.
16 | Part Number |
