Raypak XTHERM 1505 User Manual

Page 3

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 deci-
pher. 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 factory-
mounted multi-function control delivers precise load-
tracking 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 pri-
mary 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.

13. Flue Outlet

Stainless steel Category IV compatible.

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 corro-
sive 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.