Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V Hydrolevel
Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V Hydrolevel
Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V Hydrolevel
Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V Hydrolevel
Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V Hydrolevel
Safgard 550SV, Low Water Cut-Off w/ Manual Reset & Test Button, Short Probe, Gas or Oil, 120V
Brand: Hydrolevel
Part#: 45-551
Model: Safgard 550SV
made in usa
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Description

Hydrolevel Safgard 550SV is a 120V commercial-grade low water cut-off (LWCO) for Gas or Oil-fired hot water boilers (or as a secondary on steam boilers) with manual reset, test button and short probe (designed to fit into a standard tee fitting). Immediately interrupts power in a low water condition, locks out burner circuit if water remains below probe level for longer than 30 seconds. Manual reset will not trip due to power failures. Test button simulates low water condition and allows for checking control without lowering the water level in a system.

Cross-References:
  • McDonnell & Miller: PS-851-M-SP-120
  • Taco: LTM120

Features:
  • Short probe fits inside standard tee fitting
  • Meets ASME CSD-1 requirements for commercial applications
  • Suitable for Gas or Oil-fired boilers
  • Separate Test button for easy diagnostics without lowering the water level or removing the probe
  • Separate Manual Reset button with nuisance lock-out protection (will not trip due to power failures)
  • LED indicators for power and low water
  • Suitable for use as a secondary control on residential and light commercial steam boilers
  • Low maintenance - no blowdown or moving parts
  • Multiple wiring options
  • Contacts for optional low water alarm

Technical Specifications:
  • System Type: Gas or Oil-fired Hot Water or Steam (as Secondary) Boilers
  • Reset: Manual
  • Connection: 3/4" NPT
  • Electrical Specs: 120V, 60 Hz, 4 VA (Power Consumption); SPDT (Relay Type), NEMA 1 Enclosure
  • Switching Capacity: 5.8 FLA, 34.8 LRA
  • Max Pressure: 160 psi

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