XTherm® Condensing Boilers & Water Heaters
XTherm products take their jobs seriously. On the outside the muscular powder coated steel cabinet provides clean proportions with a strong, unrivaled weather resistant design. A look on the inside reveals the XTherm's hybrid heat exchanger system design. Our vertically stacked and robust copper main heat exchanger delivers maximum non-condensing efficiency that works seamlessly with our new state of the art stainless steel commecial grade secondary heat exchanger. Maximum synergy is maintained through out the complete XTherm heat exchange system with Raypak's proven Cold Water Run System, a proven design approach that ensures the XTherm is built for even the longest days of work, while saving the maximum amount of energy every time it is used.

1. Low Voltage Wiring Terminal
Up front and easy to get to. Makes sensor wiring and BMS wiring simple and clean.

2. On Board Diagnostic Center
Factory-mounted standard equipment. Gives relevant service feedback as well as possible solutions to clear the fault. All in plain english, no cryptic codes to decipher. The control also stores up to 16 fault codes in its history file for the service technician to review.

3. TempTracker Mod Controller
Standard equipment on the XTherm. This factorymounted multi-function control delivers precise loadtracking with selectable mode displays that are easy to access and read.

4. Combustion Air Fan
Cast aluminum, non-sparking construction. The state of the art variable speed fan is controlled by the TempTracker Mod and works in smooth harmony with the main gas valve.

5. Dungs Gas Valve
The XTherm uses a state-of-the-art main gas valve manufactured in Germany. This precision gas valve works in perfect unison with the combustion air fan. The result is silky smooth light-offs and a 4:1 turn down.

6. Flow Switch
Monitors water flow and provides safe shut down if water flow drops below the minimum required.

7. Vent Pressure Switch
Monitors vent pressure and provides safe shut down if back pressure is excessive.

8. Gas Inlet
The XTherm will operate at 100% full rate with gas pressures as low as 4.0"w.c.

9. Boiler Pump
Sometimes referred to as the primary pump. This pump keeps flow through the heat exchanger.

10.Water Outlet

11.Water Inlet
The XTherm can accept 50°F continuous inlet water temperature.

12. Cold Water Run Pumps
The XTherm comes factory equipped with a built in Cold Water Run system. This advanced water control system keeps the inlet water temperature to the primary heat exchanger above 120°F, regardless of the incoming water temperature. It constantly self adjusts and regulates the incoming water flow while still maintaining a constant delta-T in the heat exchanger.

14. Stainless Steel Secondary Heat Exchanger
Recovers waste heat to boost efficiency into 96%+ range. The XTherm utilizes a separate high-grade stainless steel heat exchanger. This allows the corrosive combustion condensate to be collected safely without damaging the heater. There is a condensate disposal connection on the rear of the heater. The XTherm is also equipped with a condensate switch that will sense a blocked condensate drain, which protects the heater.

15. Vertical Heat Exchanger
Cylindrical, multi-pass heat exchanger captures all radiant energy, eliminating the need for heavy refractory.

16. Drain Valve
One of two drain valves located at the bottom of the heat exchanger. A third drain valve is located on the secondary heat exchanger. This allows for complete winterizing and drainage of the heater.

17. Viewing Port
Allows for easy burner inspection.

18.Weather-Proof Jacket
Heavy gauge galvanized steel with a UV-resistant Polytuf powder coat finish is impervious to weather and corrosion