Laars Mascot HT330 - Wall-Mounted Combination Hydronic Boiler

• Input: 126.4 MBTU/h (37.0 kW)
  
• Output: 112.6 MBTU/h (33.0 kW)
  
• Pressure Relief Valve Setting: 30 psi
• Supply Flow Connection: 3/4"
• Return Connection: 3/4"
• Relief Valve Connection: 3/4"
• Service Clearances:
  • Top: 9"
  • Bottom: 10"
  • Sides: 2"
  • Front: 18"

• Sleek, appliance-grade cabinet that looks great in any location
• Up to 96% efficiency, condensing operation
• 2-year parts warranty, 10-year heat exchanger warranty
• Sealed combustion
• Direct spark ignition for reliability and smooth starts
• Three venting options to meet the needs of almost any installation
• Modulating gas valve that varies from 30% to 100% input
• Variable speed quiet blower
• Boilers are set up for natural gas, no parts necessary for conversion to LP gas
• Built in expansion tank that will handle 26.4 gallons of system water
• Built in water fill valve
• Water flow sensor for hydronic system
• Grundfos circulator with air vent and "quick-remove" mounting system
• Automatic 3-way valve for DHW priority
• Back-flow preventer
• Mounting kit with template and wall bracket for fast and easy installation
• Light-weight (100 lbs.) makes handling easy
• Stainless steel ASME primary heat exchanger with externally welded manifolds for better flow rates and prevention of leaks
• Stainless steel brazed plane DHW heat exchanger with advanced hall sensor flow switch that detects .5 gpm DHW flow rates
• Built-in reverse-pressure by-pass to prevent short cycling
• Advanced Siemens control system with temperature control, diagnostics, outdoor reset capability, and easy access for field wiring
• Complete piping kit with isolation valves, gas cock, domestic water connection adapters with unions, hydronic connectors with unions
• Condensate trap that is easy to inspect & remove from outside the boiler

Document Downloads:

Mascot HT330 Manual

Hydronic Piping Diagrams - Zone Valves

Hydronic Piping Diagrams - Zone Pumps

LP Conversion for HT 330