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Introduction

Introduction

©Aqua-Hot®

 125DN Installation Manual 

REV 220419

©Aqua-Hot®

 125DN Installation Manual 

REV 220419

p. 5

p. 4

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.
•  Read this manual 

before

 installing or using the Aqua-Hot 

System to reduce the risk of injury to persons or damage to 

the equipment.

• 

The  product  identity  label  contains  specifications  of  the 

unit, to what standards it has been tested, and important 

safety notices.

•  Disconnect electric wiring to the Aqua-Hot System before 

welding or plasma cutting the RV to avoid damage to 

equipment.

•  The Aqua-Hot tank and heating loop operate at 0.0 PSI 

(zero pressure system). Air pressure to the tank must not 

exceed 18 PSI. Exceeding this rating will cause internal 

damage to the Aqua-Hot.

• 

Use caution when working on or near any propane/diesel 

fuel system.

•  DO NOT connect the 12-volt DC power to the Aqua-Hot if the 

vehicle requires welding.

•  At maximum operating temperature, the coolant will be 

very hot and scalding. Hot vapor or coolant may cause in 

serious burns or injury. Be aware of hot surfaces.

•  Use special caution when children are present. Children 

must not be allowed to play with the heater or perform 

cleaning and maintenance.

•  Installation and repairs may only be carried out by an 

authorized, factory-trained A

qua-Hot technician. The 

heating system must be installed in accordance with local 

codes, or in accordance with the Standard for Recreational 

Vehicles, (RVIA) ANSI A 119.2/NFPA 501C, NFPA 1192.

•  At maximum operating temperature, the hot air outlet will 

be very hot that may result in serious burns or injury. Be 

aware of hot surfaces.

•  The diesel burner must be installed in a location that is 

closed off from living quarters and accessible only from the 

exterior of the vehicle.

•  The burner produces very hot temperatures that can ignite 

surrounding  flammable  materials.  The  burner  should  be 

turned off when loading or unloading flammable materials.

If the information in this manual is not followed 

exactly,  a  fire  or  explosion  may  result,  causing 

property damage, personal injury, or death.

Safety Features

Low-Voltage Shutdown

 

The Aqua-Hot Controller is designed to operate between 

11V DC and 16V DC. If the Controller detects that it is 

receiving voltage below 11.8V DC, a System Voltage fault 

will trigger a display on the LCD screen. If the Controller 

system drops below 11.2V DC for 30 seconds, it will 

discontinue operation of the Aqua-Hot heating system.

Over-Current

 

An Over-Current fault condition occurs when too much 

current is drawn by a component, usually a fan or pump. 

When this fault is triggered, the output channel is shut off 

until the system has been reset or power-cycled.

Over-Temperature

 

An over-temperature fault will occur if your Aqua-Hot heating 

system has reached 218°F. The Controller will deactivate 

the heater and display an over-temperature fault on the 

LCD display screen.

Low-Level Cutoff

 

If the system senses low fluid levels, the heating system will 

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. This 

functionality serves as a live signal to the Aqua-Hot allowing 

it to continue operating. If power is lost to the on-board RVC 

network or other on-board control systems, the controller 

is signaled to shut down operation until a 12V DC power 

signal is returned to the unit.

As with any appliance, allow the Aqua-Hot to 

completely shut down BEFORE disengaging 

the RV 12V power disconnect.

Safe Installation of the Diesel Burner

Be sure to become familiar with the installation process and the 

documentation before installing in the vehicle.
•  Make sure to protect the burner during installation. Do not 

drop or stand on the burner.

•  Avoid abruptly shutting down the burner prior to the purge 

cycle. The burner fan will continue to run for several minutes 

after being shut off to cool down and purge unused fuel.

•  Only turn off the burner at the switch in the interior of the 

vehicle.

•  Do not disconnect the 12V DC power supply prior to the 

purge cycle.

•  Only shut down the burner via the battery disconnect in the 

case of an emergency or danger.

•  Do not allow the wiring or wiring harness to come into 

contact with sharp edges on metal panels. The wires can 

become damaged and short circuit and potentially cause a 

fire. Use caution when installing the wiring.

•  Protect any vehicle parts near the burner from excessive 

heat damage, or from contamination from fuel.

•  Make sure the internal combustion burner will not pose 

a  fire  hazard  even  in  an  overheat  situation.  Take  care  in 

placing the burner with enough space from vehicle parts 

and that the burner will have ample ventilation.

•  The serial label must be visible and legible after the burner 

has been installed.

•  All precautions must be taken to minimize the risk of 

personal injury or damage to the burner or vehicle.

•  It must be obvious to the user when the burner is switched 

on or off.

•  The burner may not be mounted in a position above the 

125DN expansion tank.

Fuel Supply

•  Do not use the heater in enclosed spaces such as a garage. 

The fumes produced from the exhaust can be toxic. Do not 

use the burner while refueling or while other appliances are 

being serviced or refueled.

• 

The fuel filler neck should be installed in a compartment 

that is closed off from living quarters and must have a 

tightly fitting cap to prevent any fuel leaks.

• 

A visible, legible sign must be attached to the filler neck that 

the burner be turned off before refueling. A similar warning 

is included in the manufacturer’s operating manual.

Exhaust System

•  Do not operate the burner in an enclosed space or a space 

that does not have exhaust ventilation. Fumes from the 

exhaust may be toxic.

•  The exhaust system must be positioned so that the fumes 

will not get into the interior of the vehicle through ventilation 

openings or windows. 

Combustion Air Inlet

•  The burner combustion chamber air must not be taken from 

the interior of the vehicle, only fresh air from the exterior.

•  An intake line is required for the combustion air.

•  The air inlet must be positioned in an unobstructed manner.

NOTE: 

Contact your Authorized Service Center or Aqua-

Hot Heating Systems if you have any questions 

before

 

starting installation. Information can be found online 

at www.aquahot.com.

Содержание AHE-125-DN1

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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