Modulating Gas fired Combi boiler for indoor installation. They were approved for closet or alcove installations. For use with natural or liquefied petroleum (LP/Propane) fuel gases. Wall mounted. All boilers are factory assembled with controls, wiring, and test-fired to ensure dependable performance. The boiler shall be certified for Direct Vent applications only.

• Wall mount bracket, mounting hardware, and actual size Wall Mount Template
• The boiler is equipped with internal stainless steel brazed plate heat exchanger for potable hot water and an automatic 3-way diverting valve to allow Domestic Hot Water Priority operation.
• The boiler includes a factory-installed and wired 2-speed circulator pump.
• Factory provided primary / secondary Labor Savor™ manifold.
• Factory-provided built-in Low Water Cutoff via Pressure Switch
• Digital Boiler Control:
  • Control is Self Commissioning, which automatically recognizes fuel type (Natural or LP gas).
  • Control monitors flame signal and automatically adjusts the gas valve during operation for optimum combustion and maximum efficiency.
  • The Control system is PCB integral controller with an LCD digital/graphical display.
  • Control senses supply water temperature and adjust the boiler firing rate to deliver the amount of heat needed.
  • Control can sense and display supply water temperature and indicate when the boiler is in central heating or domestic water mode.
  • Control has a selectable DHW preheat mode. Preheat mode will maintain the brazed plate heat exchanger temperature to speed DHW delivery.
  • Control can accept an optional proprietary Outdoor Air sensor with field-adjustable reset curves.
  • The control displays Error Codes and Diagnostic information.
  • Control can accept 0-10V input to manage the heating set-point or heating power level.

Boiler Combustion System:

• The Gas valve is a modulating valve capable of firing from:
  • 115,500 BTU input down to 16,600 BTU input in Combi mode (6.9:1 turn down).
  • 93,500 BTU input down to 16,600 BTU input in Heat mode (5.6:1 turn down).
• The induced draft blower is variable speed controlled by the PCB.
• The burner is constructed of Iron-Chromium stainless steel.
• The ignition system shall incorporate a Direct Spark Igniter and a separate Flame Sensing rod.

Heat Exchanger:

• The boiler’s primary heat exchanger is constructed of Iron-Chromium stainless steel.
• DHW brazed plate is constructed of Stainless Steel.

Electrical

• 120 volts AC, 60 Hertz, 1-phase; less than 12 amps (15 amp circuit recommended).
• Factory-wired 3-foot appliance cord with a male plug end.
• Low voltage terminal strip for Thermostat and Outdoor Air Sensor.

Other:

• A field-supplied Anti-Scald valve is required for Domestic Hot Water Supply.

Warranty

• Factory Standard Warranty is 10 years on the heat exchanger, and one year on the parts.
• Warranty is extended to 10 years on heat exchanger, two years parts plus two years labor upon online warranty registration and completion of contractor registration.

Optional Equipment

• Outdoor Air Sensor Kit
• Coaxial and Two-pipe venting components