CGa,CGi,CGs,EG,EGH,LGB,PEG,PFGBoilers
❏Service periodically . . . . . . . . . . . .
Test low water cutoff (all steam boilers) (water boilers, if installed)
If the system is equipped with a low water cutoff, test the low water cutoff periodically during the heating season.
Float type — See Figure 7 | Probe type— See Figure 8 |
1.Clean float type low water cutoff to clear float chamber of sediment.
a.Open blowdown valve at bottom control.
b.Drain water into a bucket.
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| Boiler pressure and temperature must be low to avoid |
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| the potential of severe burns from steam or hot water |
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2.Check float type low water cutoff for proper operation.
a.Turn operating control to call for heat.
b.Before water gets hot, drain to bottom of gauge glass. Boiler should shut off after water level lowers a few inches.
c.Refill boiler to correct waterline. Boiler should come back on.
1.Clean probe type low water cutoff for proper operation.
a.Turn off power to boiler and wait 5 minutes.
b.Drain water to bottom of gauge glass.
c.Turn on power.
d.Set thermostat to call for heat. Red neon lamp on lower water cutoff should light.
e.Wait 5 minutes. Boiler should not fire.
f.Refill boiler to correct water line. Red lamp should go off.
g.Wait 5 minutes. Boiler should fire.
h.Return thermostat to normal setting.
Figure 7 Float type low water cutoff | Figure 8 Probe type low water cutoff |
Indicator lamp(s)
Test switch and reset switch (if manual reset)
Probe type
low water cutoff
Gauge glass
assembly50209
10 | Part Number |
