Hydrolevel low water cut-offs electronically
monitor the water level in low pressure steam boilers. The
probe sensor mounts directly in the boiler at or above the
lowest safe water level. The control allows the burner to
operate normally as long as the water level remains in contact
with the probe.
When the water level drops below
the probe, the Hydrolevel control safely shuts down the
burner after a 15 second delay. This delay feature prevents
the burner from short cycling during temporary low water
levels common in turbulent steam boiler environments.
When the water level is restored,
the control delays 30 seconds before restarting the burner.
This allows an optional water feeder to raise the water
above the probe to a normal operating level.
CycleGard cut-offs offer added protection
against volatile water levels and foaming conditions common
in today's smaller steam boilers. The control's Intermittent Level Test removes power from the burner
circuit, allowing it to monitor the settled water
level. CycleGard controls are available in several time configurations (run/test time). Consult your boiler manufacturer's instructions for correct model.
More Info on CycleGard Controls
CycleGard CGT450 models are designed
for boilers equipped with tankless coils for domestic hot
water production. Through a connection to a conventional
aquastat, the CGT450 suspends the Intermittent Level Test
feature until the aquastat's low limit setting is reached.
This feature prevents any cycling of the burner during demands
for domestic hot water. Note: Because Safgard 400 and 450
models are not designed to cycle the burner for Intermittent
Level Tests, they too are recommended for boilers with tankless