Airxcel Aqua-Hot 100 Series Service Manual Download Page 27

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System Schematics

©Aqua-Hot®

125-DN1 Service Manual

REV 220421

©Aqua-Hot®

125-DN1 Service Manual

REV 220421

p. 53

p. 52

Parts

ELE-100-010

Controller, 12VDC, 100/200 Series, Kit

ELE-HLT-426

VAC High Limit Thermostat 215°F w/ Leads

ELE-LTC-200

Low-Temperature Cutoff Thermostat w/ Spade Terminals

ELX-2E7-102

125DN Element, 1” NPSM, 120 VAC, 1500W, Heating

MSX-907-162

Refractometer

EXE-103-0EX

Heat Exchanger, Cozy III

PLX-CTB-290

Clamp, Hose, Constant Tension, 1-1/16”

Parts

PLX-362-100

Tempering Valve

PLX-111-125

Pressure Relief Valve, 125 PSI

PLX-100-900

Fluid Circulation Pump

PLX-125-3WV

Kit, Three-Way Motorized Valve, ½” NPT

PLE-063-200

3 Qt. Expansion Tank w/Internal Fluid Level Sensor, 5/8” Barb

Summary of Contents for Aqua-Hot 100 Series

Page 1: ...Service Manual 100Series AHE 125 DN1...

Page 2: ...ed by transfer from the heated antifreeze and distilled water solution The heated domestic water then flows through the tempering valve to be mixed with cool water from the fresh water tank to achieve...

Page 3: ...a Hot please contact our Technical Service Department at 574 AIR XCEL 574 247 9235 from 7 00am to 4 00pm MST Monday through Friday As with any appliance allow the Aqua Hot to completely shut down BEFO...

Page 4: ...cing disconnect all power supplies DO NOT operate the diesel burner and or electric heating element without antifreeze and distilled water heating solution present in the Aqua Hot s boiler tank Doing...

Page 5: ...2 Tempering Valve 3 Aqua Hot Controller 4 Antifreeze and Water Heating Solution Tank 5 AC Electric Element 6 AC Activation Relay 7 Plate to plate Heat Exchanger 8 Three Way Valve 9 Zone Air Bleed Val...

Page 6: ...LCD screen From here the end user will select their interior temperature set points activate or deactivate the diesel burner and the electric element Zone Control 1 Precise zone control display will d...

Page 7: ...utilized with the Aqua Hot 5in display Using the Aqua Hot with this new display will ensure that you can take advantage of all of the tools and features of this controller Features This new controller...

Page 8: ...dicates that heat is either not needed or not requested by the zone thermostat 71 This indicates the set point of the coach thermostats The example in Figure 18 is showing the coach thermostat is requ...

Page 9: ...ones have been directly wired to the Aqua Hot as described in the installation manual Heating sub systems can be activated independent of their control circuits and other control sensors as a means of...

Page 10: ...ate Ensure the controller is properly oriented reference Figure 32 10 Using the 4 nuts previously removed fasten the controller to the mounting plate 11 Insert the controller and mounting plate into t...

Page 11: ...to the INPUTS FROM AQUA HOT section HOME Aqua Hot Diagnostics DIAG Locate LLCO Does LLCO display TANK FULL Yes No This fluid level sensor is functioning as intended Replace the controller Troubleshoo...

Page 12: ...this thermostat Yes No Depress the red button in the center of the high limit thermostat Figure 40 Re test for continuity Does the thermostat now have continuity Yes No This thermostat is functioning...

Page 13: ...inue troubleshooting to the right Open a hot water faucet within the coach 1 1 2 2 Figure 47 Continue trouble shooting here Low Temperature Cutoff Thermostat Introduction The Low Temperature Cutoff Th...

Page 14: ...s of the Three Way Valve to ensure it is out of the way 6 On the top of the Three Way Valve move the two 2 constant tension clamps AWAY from the tee fitting so that they are as far from the barb as po...

Page 15: ...the Aqua Hot and slide the red and blue PEX through their ports in the front face of the Aqua Hot Use soapy water as necessary to lubricate the PEX going through the rubber grommets in the ports DO NO...

Page 16: ...Figure 60 If no functionality replace the AC electric relay Figure 59 If tank temperature is not 180 F check element for 11 2 13 amps Replace the Electric element This AC Electric system is operating...

Page 17: ...switch the electric heating element on and off in conjunction with the interior switch panel and ETS module even though the electric element is on a separate circuit Troubleshooting Procedure Trouble...

Page 18: ...ely the same Yes This ETS module is functioning as intended Disconnect the ETS module from its leads on the wire harness Navigate back to the INPUTS FROM AQUA HOT section of the LCD screen No Yes No D...

Page 19: ...Requirements Parts needed PLX 125 HA1 High Altitude Kit Potential other parts needed PLE 125 FL1 Kit 100 Series Fuel Line only if fuel lines are damaged PLX 125 003 Fuel Filter 100 Series only if fue...

Page 20: ...Pins Figure 79 1 2 Ground goes to Pin 1 Power goes to Pin 2 If you would rather use a plug instead of the wire and gator clips the mating part numbers needed for the connector are Housing 1 967644 1 T...

Page 21: ...uction A lack of interior heat or hot water when provided with adequate heat from either the electric element and or the diesel burner can be attributed to an overheat thermostat the Aqua Hot controll...

Page 22: ...rner Troubleshooting This section will cover any issues with the external diesel burner The diesel burner is the primary heat source to the 125DN The troubleshooting procedures listed below are arrang...

Page 23: ...or damage Check plumbing lines and circulation pump to make sure they are properly secured and free of any damage Check the fuel pump and circulation pump for any damage Run the burner for 20 minutes...

Page 24: ...System Schematics System Schematics Aqua Hot 125 DN1 Service Manual REV 220421 Aqua Hot 125 DN1 Service Manual REV 220421 p 47 p 46 ZONE THERMOSTATS ZONE HEAT EXCHANGERS...

Page 25: ...System Schematics System Schematics Aqua Hot 125 DN1 Service Manual REV 220421 Aqua Hot 125 DN1 Service Manual REV 220421 p 49 p 48 EXTERNAL DIESEL BURNER ELECTRIC ELEMENT...

Page 26: ...de Connectors ELE 014 711 Thermistor Tank Temperature Sensor ELE 102 201 Aqua Hot AC Harness ELE 102 211 Burner DC Harness ELE 400 900 Harness Buehler C20 Pump ELX THM 309 Thermistor 10K NTC Room Temp...

Page 27: ...00 Low Temperature Cutoff Thermostat w Spade Terminals ELX 2E7 102 125DN Element 1 NPSM 120 VAC 1500W Heating MSX 907 162 Refractometer EXE 103 0EX Heat Exchanger Cozy III PLX CTB 290 Clamp Hose Const...

Page 28: ...that is complete peer through the eyeglass of the refractometer to continue to the next step Adjust the Boundary Line Once the glycol solution has been properly applied adjust the calibration screw u...

Page 29: ...Heating Systems LLC 7501 Miller Drive Frederick CO 80504 Visit us online at www aquahot com Call us at 574 AIR XCEL 574 247 9235 2022 Aqua Hot Heating Systems LLC Printed in the USA Service Manual 10...

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