Operating instructions

CGa, CGi, EG, EGH, LGB, PEG, Boilers
10
Part Number 550-142-801/0712
❏ Service periodically . . . . . . . . . . . .
Figure 7 Float type low water cutoff Figure 8 Probe type low water cutoff
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.
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.