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Introduction

Introduction

©Aqua-Hot®

 125DN Installation Manual 

REV 220419

©Aqua-Hot®

 125DN Installation Manual 

REV 220419

p. 3

p. 2

Installation Checklist

Installation Checklist

Completed Description

Page No.

12VDC connected to Aqua-Hot

27

120VAC connected to Aqua-Hot

28

Cozy’s installed

29-31

Cozy’s wired

32

Cozy’s plumbed (in the bottom port, out through the top port)

33

Domestic Water System plumbed to the Aqua-Hot

35

Domestic Water Flow through the Aqua-Hot regulated to 0.8 GPM

35

Aqua-Hot LCD mounted in correct orientation

36

Heating Zones configured on LCD

39

Aqua-Hot filled with proper mixture of ethylene glycol/distilled 

water heating solution

40

Aqua-Hot filled and purged properly

41

Fuel stand pipe installed in vehicle fuel tank

42

Fuel lines properly installed

43-45

Fuel system components connected to fuel line in order

43-45

Fuel line hose clamps fully tightened

43-45

Fuel system properly purged before operating the burner

46

System checks performed before first operation

49

First operation properly performed

50

Completed Description

Page No.

Aqua-Hot Installed

11

Expansion Bottle Mounted

12

Diesel Burner Installed/Mounted

13

High Altitude Bypass Mounted

14

High Altitude Bypass Fuel Pump (Horizontal)

44

Diesel Burner Air System Installed

16

Diesel Burner Exhaust System Installed

17

Diesel Burner Harness connected to Burner

18-20

Diesel Burner Harness connected to solenoid

20

Diesel Burner Harness connected to fuel pump

20

Diesel Burner Harness connected to Aqua-Hot

20

Aqua-Hot “to Heat Source” port connected to Burner “In” Port

21-23

Aqua-Hot “from Heat Source” port connected to Burner “Out” Port

21-23

RV Thermostats OR Thermistors wired to Aqua-Hot

24-25

House Power Sense wire connected

26

Introduction:

The following table is a checklist of important items that 

need to be completed for a successful install of the 

125-DN1 

Aqua-Hot heater in your RV. Please confirm each item is properly 

completed before utilizing the Aqua-Hot heating system.

Should additional assistance be needed, please contact 

the Technical Support team at 574-AIR-XCEL (574-247-9235), 

Monday through Friday, between 7:00am and 4:00pm MST. 

You can also email the service department at servicedept@

aquahot.com. Authorized Service Centers can also be found 

online at www.aquahot.com.

All vehicle installations must comply with the requirements 

listed in the Recreational Vehicle Industry Association’s 

(RVIA) ANSI/NFPA 1192 Handbook for Recreational Vehicle 

Standards.

WARNING!

Read and understand all instructions 

before

 installing the 

Aqua-Hot unit and the external diesel burner. Aqua-Hot Heating 

Systems is not liable for damage resulting from failing to 

follow instructions contained in this, and any other Aqua-Hot 

documentation relevant to this unit.
Improper installation, adjustments, service and maintenance 

can cause personal injury or loss of life. Reference the 

installation and user manuals 

before

 installation or service.

Contact your authorized service or Aqua-Hot Heating Systems if 

you have any questions 

before

 starting installation.

If the information in this manual is not followed 

exactly,  a  fire  or  explosion  may  result,  causing 

property damage, personal injury, or death.

Summary of Contents for AHE-125-DN1

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

Page 2: ...urging the Interior Heating Loop 41 Fuel Supply 42 Fuel System 43 Fuel Purge Procedure 46 External Diesel Burner Troubleshooting 47 System Checks 49 First Operation 50 Winterizing 51 Flow Diagram 52 A...

Page 3: ...Aqua Hot 20 Aqua Hot to Heat Source port connected to Burner In Port 21 23 Aqua Hot from Heat Source port connected to Burner Out Port 21 23 RV Thermostats OR Thermistors wired to Aqua Hot 24 25 House...

Page 4: ...ll shut down all fans heat sources and pumps until the unit is adequately refilled House Power Sense The Aqua Hot Controller contains within it a fail safe functionality known as House Power Sense Thi...

Page 5: ...our on product identity label contains the specifications of your unit Factory settings may be adjusted by the vehicle manufacturer confirm final setting with your dealer This heating system has been...

Page 6: ...2 NOTE This product label shown above is attached to the side of the burner and provides a ready reference to specifications test standards and important safety notices 1 Fluid Circulation Pump 2 Tem...

Page 7: ...Aqua Hot in place on the RV floor Use at least 1 screw per mounting tab 3 tabs The best place for the Aqua Hot heating system is in a cabinet or storage space making sure there is ample space to remov...

Page 8: ...OTE Avoid any bends or dips in the overflow tubing from the Aqua Hot Air can become trapped in these bends and will prevent excess antifreeze and water heating solution from depositing properly in the...

Page 9: ...recommended to use a minimum of three mounting holes Do NOT mount the fuel pump higher than the fuel inlet on the burner see Figure 7 on Page 8 and the Fuel System section pages 40 44 for reference Hi...

Page 10: ...the interior of the vehicle only the exterior Failure to do so can cause exhaust gas to leak inside the vehicle causing illness and or death The specifications and requirements must be followed carefu...

Page 11: ...3041 Terminal TE Connectivity 828905 1 Wire Seal X6 Connector Figure 33 Figure 36 Figure 35 Diesel Burner Wire Harness The diesel burner and connectors will need to be properly installed Please note t...

Page 12: ...ircuits Connecting the Burner to the Aqua Hot These instructions will cover the installation and connections for the diesel burner to the 125DN Installation Instructions 1 Mock up the locations for th...

Page 13: ...ot re cut the thread multiple times The screw must be carefully inserted in the existing threads and screwed in by hand Burner Connections Retaining Plate 15mm Self Tapping Screw Plumbing Requirements...

Page 14: ...ntacts Once the required hardware has been acquired wire the J8 plug according to the table below Pins J8 10 through J8 15 are not utilized Pin Number Function Connect To J8 1 Zone 1 Thermostat In Zon...

Page 15: ...Special If for some reason pin J3 1 cannot be supplied with power supply 12V DC power to the J8 9 pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 J8 Wire Insertion View Shown J3 Wire Insertion View Shown Fig...

Page 16: ...to the vehicle s AC electric system Connect the 3 pin Molex connector to the coach side AC electric system in order to utilize the Aqua Hot s AC heating element The Aqua Hot utilizes Molex 19403 and 1...

Page 17: ...ly to be contaminated Aqua Hot advises against placing a heat exchanger on the slide out section of any vehicle due to the high probability of damage occurring to the heating loop from moving parts Fi...

Page 18: ...installation principles can hinder the operation of the heat exchangers All plumbing should be installed as flatly as possible Extreme rises in height should be avoided to avoid any potential air tra...

Page 19: ...nk is up at operating temperature Activate the external diesel burner to provide adequate heat for hot water needs The electric element will only provide light duty hot water The tempering valve is in...

Page 20: ...e of zone thermostats used within the RV Section 1A demonstrates the appearance of the zone control section when ON OFF thermostats are used within the RV In this use case these buttons serve only as...

Page 21: ...his option toggles the Aqua Hot s quiet mode Quiet mode is a setting where the speed and output of the heat exchanger fans is reduced to 80 This is done to reduce noise of the heat exchangers Please n...

Page 22: ...ternal pump in the receptacle which contains the heating solution Make sure to select the correct glycol antifreeze product for the external heating source Failure to select the correct product could...

Page 23: ...e fuel tank Vehicle Fuel Tank Figure 90 Fuel Supply Failure to follow instructions on the fuel delivery system can cause damage to the Aqua Hot 125DN the diesel burner or the RV It may cause serious p...

Page 24: ...Clamp B Bubble B A A B NOTE The fuel lines must be secured and supported properly to avoid air traps or bubbles Avoid unnecessary dips or bends the line should not run downward from the fuel pump High...

Page 25: ...omplexity Do not replace parts without correctly determining the failure Follow the directions below in order to troubleshoot the diesel burner Do not skip through the troubleshooting steps as this ma...

Page 26: ...here should be substantial separation from the burner and the ground 7 There should be enough space between the vehicle body and any heat generating components like the exhaust and burner 8 Ensure the...

Page 27: ...o perform the fuel line purge procedure on Page 44 prior to starting this initial start up of the burner Winterizing the Aqua Hot Not winterizing the Aqua Hot when freezing temperatures are present wi...

Page 28: ...r and Diesel Burner DIESEL BURNER AUTO AIR BLEED AUTO AIR BLEED 3 WAY VALVE COOLANT TEE RECOVERY BOTTLE FILL PORT BALL VALVE 3 Way Valve Controls Coolant Flow Path For Interior or Hot Water Heating In...

Page 29: ...eating Loop Purging the Heating Loop Aqua Hot 125DN Installation Manual REV 220419 Aqua Hot 125DN Installation Manual REV 220419 p 55 p 54 System Schematics ZONE THERMOSTATS System Schematics ZONE HEA...

Page 30: ...ating Loop Purging the Heating Loop Aqua Hot 125DN Installation Manual REV 220419 Aqua Hot 125DN Installation Manual REV 220419 p 57 p 56 System Schematics EXTERNAL DIESEL BURNER System Schematics ELE...

Page 31: ...he next step Adjust the Boundary Line Once the glycol solution has been properly applied adjust the calibration screw until the boundary line labeled Ethylene Glycol is set to 32 F The graphic to the...

Page 32: ...Room Temperature Sensor Parts Accessories EXX 950 411 Grille 10 x 2 Cozy EXX 006 500 Grille Long 3 5 x 21 5 Black EXE 505 65A Heat Exchanger Whisper Silent 12V DC EXX 013 100 Nozzle Round 4 w o Connec...

Page 33: ...FL1 Kit Fuel Line 125DN PLX 000 200 Tube Safety Stripe 12ft PLX 000 820 Fitting Elbow 90 Barb Black Nylon PLX 000 835 Fitting Reducer to Black Nylon Parts Accessories PLX 200 103 Fitting M NPT x Barb...

Page 34: ...e use of accessory parts or parts not authorized by Aqua Hot Heating Systems Inc repair by unauthorized persons and damage or abuse of the heater are specially excluded from warranty coverage For addi...

Page 35: ...ting Systems LLC 7501 Miller Drive Frederick CO 80504 Visit us online at www aquahot com Call us at 800 685 4298 or 303 651 5500 2022 Aqua Hot Heating Systems LLC Printed in the USA Installation Manua...

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