Weil-mclain CGa User Manual download pdf (Page 10)

CGa, CGi, CGs, EG, EGH, LGB, PEG, PFG Boilers

Part Number 550-110-592/0408

Probe type— See Figure 8

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.

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.

Figure 7 Float type low water cutoff Figure 8 Probe type low water cutoff

❏ Service periodically . . . . . . . . . . . .

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.

. Boiler pressure and temperature must be low to avoid

the potential of severe burns from steam or hot water.

Float type — See Figure 7

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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Weil-mclain CGa User Manual Page 10