Aqua-Hot 200 Series User manual

INSTALLATION MANUAL
200SERIES
200P, 250P and 250D

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©Aqua-Hot® 200 Series Installation Manual Rev. E
Table of Contents
Aqua-Hot 200 Series Installation Manual
Cautions and Introductions.................................................. 2
Aqua-Hot Hydronic Heating System
Safety Precautions and Instructions ............................ 3
Heating System Features.............................................. 6
250D Components ........................................................ 7
200P/250P Components ............................................. 8
Aqua-Hot Installation
Installing the Aqua-Hot.................................................. 9
Aqua-Hot Measurement Diagrams .............................10
Mounting Brackets ......................................................11
Installing the Expansion Bottle ...................................12
Hydronic Heating System
Heat Exchanger Floor Plan..........................................13
Heat Exchanger Installation Requirements ...............14
Mounting the Heat Exchangers ..................................15
Location, Clearances and Boost Pump ......................16
Wiring the Heat Exchangers........................................17
Wiring for OEM RV-C or Multiplex ...............................17
Plumbing the Hydronic Heating System .....................18
Domestic Water System
Requirements and Plumbing ......................................20
Switch Panel
Switch Panel Location, Mounting ...............................21
250D Switch Panel Rear View ....................................22
200P/250P Switch Panel Rear View .........................23
Fuel System
Propane Fuel Specifications .......................................24
Diesel Fuel Specifications...........................................25
Exhaust System
Exhaust System Requirements...................................27
Installing the Exhaust System.....................................27
Wiring Specifications
Wiring Harness Pin-Out ..............................................30
Connecting the 200P and 250P to DC Power ...........31
Connecting the 250D to DC Power.............................32
Connecting the 250P or 250D to AC Power ..............33
Purging the System
Purging the Hydronic Heating System ........................34
Initial Start Up
Activating the Aqua-Hot...............................................35
Appendices
Appendix A: 250P Wiring Schematic.......................... 36
Appendix B: 200P Wiring Schematic ......................... 37
Appendix C: 250D Wiring Diagram............................. 38
Appendix D: Measuring Antifreeze Concentration..... 39
Parts and Accessories ..................................................... 40
Warranty.......................................................................... 47

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2 ©Aqua-Hot® 200 Series Installation Manual Rev. E
Introduction and Cautions
About the Aqua-Hot 200 Series
The Aqua-Hot 200P, 250P, and 250D are hydronic (water
based) heating systems that provide interior heat and tank-
less, continuous hot water in one small, easy to install pack-
age.
The heating system provides moist, quiet, comfortable
interior heat. The Aqua-Hot is equipped with one thermostati-
cally controlled temperature zone.
The tank-less hot water system produces 90 gallons per
hour (1.5 GPM) of continuous hot water.
These TribridHot™ systems use one or a combination of
heat sources to heat FDA-approved “Generally Recognized As
Safe” (henceforth referred to as “GRAS”) propylene glycol
based antifreeze solution in the Aqua-Hot’s boiler tank.
The 200P uses a 12V DC powered propane burner to
heat the system and does not have an electric element. The
propane burner is to be used for any and all heating or hot
water needs.
The 250P and 250D employ a 12V DC burner (propane
and diesel, respectively) as the primary heating source. The
burner should be used for continuous hot water, and heating
in cold conditions. In addition to a burner, the 250P and
250D models also employ a 120V AC 1000W electric heating
element as a supplemental heating source. Once the tank
has reached temperature by way of the 12V DC burner, the
electric element may be engaged to provide light-duty hot
water and heating needs, and serves to maintain tank tem-
perature during periods which the heater is not in use. For
continuous hot water and heat in cold conditions, the burner
must be active.
Should additional assistance be needed, please contact
the Product Application Department at [phone],
Monday through Friday, 7a.m. to 4p.m. Mountain Standard
Time.
Caution Notes
As you read this information, take particular note of the NO-
TICE, CAUTION, WARNING, and DANGER symbols when they
appear. This information is important for safe and efficient
use of the Aqua-Hot equipment.
NOTICE signals a situation where potential damage to the
equipment could occur.
CAUTION signals a situation where potential harm or risk of
minor or moderate injury could occur if instructions are not
followed.
WARNING signals a hazardous situation where potential
harm, risk of serious injury or death could result if you do not
follow instructions.
DANGER signals a situation where immediate risk of serious
injury or death will result if you do not follow instructions.
NOTE: This manual will also use notes sections similar to
this one to draw attention to features and practices which
should be observed.

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©Aqua-Hot® 200 Series Installation Manual Rev. E
Safety and Precautions
The Aqua-Hot Heating System
Read and understand all instructions before installing this
unit.
• Read this owner’s manual before installing or using the
Aqua-Hot system to reduce the risk of injury to persons or
damage to equipment.
• The product identity label contains specifications of the
unit, to what standard it has been tested, and important
safety notices.
• The Aqua-Hot must be installed in a compartment that is
closed off from living quarters and accessible only from
the outdoors.
• Propylene glycol based antifreeze “Generally Recognized
As Safe” (GRAS) by the FDA must be utilized for antifreeze
and water heating solution.
• An interlock switch prevents the Aqua-Hot heater from
operating when the cover is not installed in the correct
position.
• Should any additional assistance be needed, please con-
tact the Technical Support Department at +1 (800) 685-
4298 or [phone].
• Do not store or use gasoline or other flammable vapors or
liquids in the vicinity of this or any other appliance
• Disconnect electric wiring to the Aqua-Hot system before
welding or plasma cutting the RV or home to avoid dam-
age to equipment
• Air pressure to the tank must NOT exceed 20PSI or it will
cause damage
• The Aqua-Hot exhaust is HOT and must be kept away from
heat sensitive material
• Use caution when working on or near the propane gas
system
• DO NOT connect the 12V DC power to the Aqua-Hot if the
RV or home requires welding
• At maximum operating temperatures, the coolant will be
very hot and scalding hot vapor or coolant may result in
serious burns or injury
• DO NOT activate the burner until the antifreeze and water
heating solution has been added to the boiler tank to
avoid serious damage to the heater
WHAT TO DO IF YOU SMELL GAS
• Evacuate all persons from the vehicle
• Shut off the gas supply at the gas container or source
• Do not touch any electrical switch or use any phone or
radio in the vehicle
• Do not start the engine or electric generator (if equipped)
• Contact the nearest gas supplier or qualified service tech-
nician for repairs
• If you cannot contact the nearest gas supplier or qualified
service technician, contact the nearest fire department
• Do not turn on the gas supply until the gas leak or leaks (if
relevant) have been repaired
• Installation and service must be performed by a qualified
installer, service agency or gas supplier
The Aqua-Hot’s exhaust is HOT!
• Do NOT park in areas where dry conditions exist (i.e.
grassy, dry fields)
• Do NOT operate the burner inside an enclosed building
• The heater must be switched OFF when refueling
If the information in these instructions are not followed ex-
actly, a fire or explosion may result causing property dam-
age, personal injury, or death.

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4 ©Aqua-Hot® 200 Series Installation Manual Rev. E
200P Safety & Precautions

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©Aqua-Hot® 200 Series Installation Manual Rev. E
250P Safety and Precautions

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6 ©Aqua-Hot® 200 Series Installation Manual Rev. E
System Features
Burner
Heat Input (Propane)........................... 60,000 BTU/hr ± 10%
Heat Input (Diesel) .............................. 66,000 BTU/hr ± 10%
Fuel Consumption (Propane)........................... 0.66 gallon/hr
Fuel Consumption (Diesel)............................... 0.40 gallon/hr
Electric Heating Element (250P/250D only)
Power Consumption .....................................................1000W
Voltage ........................................................................120V AC
Maximum DC Power Consumption
Power Consumption (Propane)........................................ 42W
Power Consumption (Diesel) ......................................... 108W
Voltage ..........................................................................12V DC
Zone Heat Circulation
Pumps ..................................................................................... 1
Power Consumption ......................................................... 21W
Voltage ..........................................................................12V DC
Heating Zones
Maximum ................................................................................ 1
Domestic Water Heating
Continuous Supply ...........................................1.5 gallon/min
Specifications
Dimensions...............................17.2”H x 12.46”W x 22.44”L
Dry Weight .....................................................................84 lbs.
Wet Weight ..................................................................104 lbs.
All vehicle installations must comply with the requirements
listed in the Recreational Vehicle Industry Association’s (RVIA)
ANSI/NFPA 1192 Handbook for Recreational Vehicle Stand-
ards. To receive a copy of this handbook and other pertinent
RVIA Standards, write to:
Recreational Vehicle Industry Association
1896 Preston White Dr
PO Box 2999, Reston, VA 22090-0999
Or contact them by phone at [phone], or online at
www.rvia.org, or www.nfpa.org
NOTE: The product label is
attached to the side of
the Aqua-Hot and pro-
vides a ready reference to
specifications, test stand-
ards and important safety
notices.
Figure 1
Figure 2

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©Aqua-Hot® 200 Series Installation Manual Rev. E
250D Components
1. Domestic Cold Water Inlet
2. Domestic Hot Water Outlet
3. Diesel Fuel Connections
4. 12V DC Harness Junction
5. Expansion Tank Connection
6. Heating Zone Outlet Port
7. Heating Zone Return Port
8. 120V AC Connection
9. Interlock Switch
10.3-Way Valve
11.Diesel Burner Assembly
12.Boiler Tank
13.Tempering Valve
14.Diesel Burner Controller
15.Zone Circulation Pump
16.Drain Valve
17.Access Cover Screw
1 2 3 4 5 6 7 8
17
9
10
11
13
14
16
15
12
Figure 3

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8 ©Aqua-Hot® 200 Series Installation Manual Rev. E
200P & 250P Components
1. Domestic Cold Water Inlet
2. Hot Water Outlet
3. Propane Inlet Ball Valve
4. 12V DC Harness Junction
5. Expansion Tank Connection
6. Heating Zone Outlet Port
7. Heating Zone Return Port
8. 120V AC Electrical Relay Box (250P Only)
9. Propane Burner Assembly
10.Tempering Valve
11.Boiler Tank
12.3-Way Valve
13.Propane Burner Controller
14.Interlock Switch
15.Drain Valve
16.Zone Circulation Pump
17.Access Cover Screw
51 2 3 4 86 7
16
15
14
13
12
11
10
9
17
Figure 4