The proven XTherm - vertical modulating condensing boiler, in sizes from 1005 to 2000 MBTU. XTherm combines time-honored high-recovery copper fin technology with cutting-edge control and combustion advancements. The installer can enjoy broad installation flexibility, easy commissioning, and long-term reliability.
Features:
- 96% efficiency at full fire. Condensing. Cat IV venting required.
- Cast-iron headers and pumps with copper finned-tube primary heat exchanger. Brass headers and cupro-nickel tubes available as options. CSA Low Lead Certified 0.25% Lead
- Minimum continuous inlet water temperature (50°F).
- Electronic modulating gas valve and burner, 7:1 turndown.
- Small footprint, less than 11 square feet.
- On-board diagnostic center, real English, no codes.
- All models indoor/outdoor construction.
- Complete cabinet protects all controls and wiring.
- Certified under SCAQMD rule 1146.2. Meets all Low NOx regulations.
- Suitable for altitudes up to 10,000 ft. (derate above 5,000 ft.).
- Primary-secondary piping required.
- 0-10 VDC Remote set-point BMS Interface.
- 0-10 VDC Direct Drive.
- Available for natural gas or propane.
- VERSA IC® control package with built-in outdoor reset function.
- Cascade control of up to 8 units, no external sequencer required.
- Cascade in parallel or sequential modulation modes.
- Modbus® RTU port (RS485).
- Touch Screen
Options:
- Outdoor air Sensor (B-32)
- Indirect DHW sensor
- BACNet IP, BACnet MS/TP, Modbus TCP, N2 Metasys (B-85)
- Lonworks (B-86)
- Alarm with 4” Bell (E-5)
- Low Water Cutoff (F-10)
- PVC vent factory installed only (D-32)
- Centrotherm® Polypropylene Vent Adapter (D-33)
- Condensate Neutralizer (Z-12)