Weil-McLain CGa Series User Manual

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21550-142-301/0123
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Test the Low Water Cuto󰀨
The system is equipped with a low water cuto󰀨. Test
the low water cuto󰀨 periodically during the heating
season.
Float Type Low Water Cuto󰀨
DANGER
!
Boiler pressure and temperature must be low to
avoid the potential of severe burns from steam or
hot water.
1. Clean oat type low water cuto󰀨 to clear oat
chamber of sediment. See Figure 9.
a. Open blowdown valve at bottom control.
b. Drain water into a bucket.
2. Check oat type low water cuto󰀨 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 o󰀨 after water
level lowers a few inches.
c. Rell boiler to correct waterline. Boiler should
come back on.
Probe Type Low Water Cuto󰀨
Clean the probe type low water cuto󰀨 for proper
operation. See Figure 10.
1. Turn o󰀨 power to boiler and wait 5 minutes.
2. Drain water to bottom of gauge glass.
3. Turn on power.
4. Set thermostat to call for heat. Red neon lamp on
lower water cuto󰀨 should light.
5. Wait 5 minutes. Boiler should not re.
6. Rell boiler to correct water line. Red lamp should
go o󰀨.
7. Wait 5 minutes. Boiler should re.
8. Return thermostat to normal setting.
Maintenance Procedures — PERIODICALLY
(continued on the next page)
Draft - For Engineering Review ONLY Jan. 2023 HC
Figure 9 Float type low water cuto󰀨
Figure 10 Probe type low water cuto󰀨

Weil-McLain CGa Series Specifications

General

Fuel Type	Natural Gas or Propane
Boiler Type	Cast Iron
Heat Exchanger Material	Cast Iron
Ignition System	Electronic Ignition
Vent Type	Atmospheric Vent
Operating Pressure	30 psi
Weight	Varies by model