User Guide

11
Part Number 550-142-301/0420
User’s Information Manual
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 – The system is equipped with a low water cutoff. Test the low water cutoff periodically
during the heating season.
Float type — See Figure 7
1. Cleanoattypelowwatercutofftoclearoatchamberof
sediment.
a. Openblowdownvalveatbottomcontrol.
b. Drainwaterintoabucket.
. Boiler pressure and temperature must be low to
avoid the potential of severe burns from steam
or hot water.
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.
❏ Service periodically . . . . . . . . . . . .
User maintenance procedures (continued)
Figure 9 Integtrated type low water cutoff
Integrated type— See Figure 9
1. TestLWCOusingcontrolLWCOTESTbutton.
a. Duringburnerre,pressLWCOTESTbutton.
b. Burner should shut off.
2. Clean periodically (when warning occur).
a. Turn off power to boiler wait 5 minutes.
b. Drainboilertoempty.
c. Remove sensor, wipe clean.
d. Re-installsensortospecied18ft/lbstorque.
e. Refill boiler to pressure, purge air.
f. Turn on boiler power.
g. Ensure proper operation resumes.