Brochure

9
S T E A M B O I L E R C O N T R O L S
Low Water Cut-Offs – Residential/Commercial
400 Series
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15 Second Burner Off Delay
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30 Second Burner On Delay
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Automatic Reset
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Low Water Indicating Light
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Direct Boiler Mounting – Eliminates Blowdowns
MODEL VOLTAGE DESCRIPTION/OPERATION
400 24 VAC Burner circuit contacts open after 15 second delay in a low water condition.
450 120 VAC Delay prevents short cycling caused by momentary fluctuations in the boiler
water level. Automatically reactivates burner circuit 30 seconds after water
reaches the probe, allowing optional water feeder to raise water level above
the probe. See page 14 for information on VXT Water Feeder.
711 and 724 Series
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Low Water Cut-Off for Sight-Glass Attachment
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Two Probe Design
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Automatic Reset
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Includes Quick Hook-Up Fittings for 8" to 14"
Sight Glasses
MODEL VOLTAGE DESCRIPTION/OPERATION
724CF 24 VAC Mounts to sight glass tappings. Maintains water level between two probes.
711CF 120 VAC Includes 711C manifold, two model EL1214 probes and quick hook-up fittings.
Note: The 711 & 724 Series is recommended for use on older boilers that do not
have tappings suitable for Safgard 400 and CycleGard 400 Series cut-offs.
724WF 24 VAC Same as CF models (described above), includes water feed valve assembly.
711WF 120 VAC
Specifications 711 Series 724 Series
Power Consumption 8 VA 7 VA
Switching Capacity 50 VA 5.8 FLA, 34.8 LRA
Switch Contacts SPDT SPDT
Max. Steam Pressure 35 PSI 35 PSI
Specifications Model 400 Model 450
Power Consumption 2 VA 4 VA
Switching Capacity 50 VA 5.8 FLA, 34.8 LRA
Switch Contacts SPDT SPDT
Max. Steam Pressure 15 PSI 15 PSI