Aqua-Hot 450D Installation Manual
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Aqua-Hot 450D Installation Manual

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AHE-450-DE5 Installation Manual
System Overview
The Aqua-Hot 450D is a Hydronic (water-based) Heating System, a tank-less hot water system, and a diesel engine
preheating system.
The heating system provides moist, quiet, comfortable, interior heat with up to 5 separate, thermostatically-controlled
temperature zones, and prevents tank and line freezing in the bays.
The tank-less hot water system produces 90 gallons per hour of continuous, on-demand hot water.
The diesel engine preheating system circulates the engine's antifreeze solution through an internal heating loop in the
AquaHot and pumps it back through the engine, raising the engine's temperature from 30°F to 90°F in about 1 hour.
The same heating loop that preheats the diesel engine allows the Aqua-Hot system to take surplus heat generated by
the motor home's diesel engine while running, and use it to heat the Aqua-Hot system.
This TribridHot™ designated system uses one or a combination of heat sources to heat FDA-Approved Generally
Recognized As Safe ("GRAS") Propylene Glycol-based antifreeze solution in the Aqua-Hot's boiler tank.
The 450D has multiple heating sources: the motor home's engine's surplus heat (while driving), one 120V AC - 1650W
Electric Element (when plugged into shore power), and a 12V DC powered diesel burner (when dry camping). These
heat sources can be used separately or simultaneously.
New Low Emissions Technology virtually eliminates smoke and odor from the exhaust by reducing total hydrocarbon
emission by 82%, making Aqua-Hot the cleanest burning diesel-powered hydronic heating system available.
Should additional assistance be needed, please contact the Technical Support at 574-AIR-XCEL (574-247-9235),
Monday through Friday, between 7:00am and 4:00pm MST.
https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu...
Updated: Fri, 21 Jun 2024 04:59:37 GMT
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Summary of Contents for Aqua-Hot 450D

  • Page 1 Recognized As Safe (“GRAS”) Propylene Glycol-based antifreeze solution in the Aqua-Hot’s boiler tank. The 450D has multiple heating sources: the motor home’s engine’s surplus heat (while driving), one 120V AC - 1650W Electric Element (when plugged into shore power), and a 12V DC powered diesel burner (when dry camping). These heat sources can be used separately or simultaneously.

  • Page 2: Important Notes

    Hot Water Priority System The Aqua-Hot 450D is a Hot Water Priority heating system. Meaning that the 450D cannot heat the interior of the coach and produce hot water simultaneously. When hot water is being used, the interior heating system will shut off temporarily, until hot water is no longer being used.

  • Page 3: System Features

    System Features https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 4 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 5: System Specifications

    System Specifications Diesel Burner Heat Input (Firing Rate) ......................56,000 BTU/hr Fuel Consumption ..........................0.40 gal/hr Electric Element Power Consumption ..............1650 W (maximum) Voltage ................................120V AC DC Power Consumption ..........................174 W (maximum) Zone Heat Circulation Pumps ....................................2 Power Consumption (max) ......................21 W (each) Voltage ...................................12V DC https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 6 8. Interlock Switch 20. Engine Preheat Inlet Pump Harness Port 3. Zone 2 Circulation 9. VAC Access Panel 15. Aqua-Hot Reporter 21. Domestic Cold Water Inlet Pump 4. Diesel Burner 10. AC Terminal 16. Domestic Water Coil 22. Domestic Hot Water Outlet...
  • Page 7 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 8 Support and Clearance Installing the Mounting Tray & Aqua-Hot Install the Aqua-Hot in a compartment that is completely closed off from living quarters and is accessible only from the https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 9 5. Secure the mounting tray into place prior to installing the Aqua-Hot. 6. Place the Aqua-Hot securely into the mounting tray to ensure that the unit does not move or shift under normal operating conditions. Reference Figure 10.
  • Page 10 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 11 Installation of the Expansion Tank Introduction: The fluid expansion tank is integral to the operation of the Aqua-Hot. It provides an area for hot, expanded fluid to empty into, and also protects the Aqua-Hot from low-fluid, which could lead to catastrophic damage of the Aqua- Hot.

  • Page 12: Exhaust System

    Exhaust System Exhaust System Requirements https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 13 • The total length of exhaust pipe should not exceed 27.5 feet. • The Aqua-Hot is supplied with a 3 inch and 4 inch black pipe nipple (1.5 inch diameter) along with a 1.5 inch exhaust elbow. Reference Figure 16. These three exhaust system components MUST BE utilized with all product installations.
  • Page 14 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 15 Installing Heat Exchangers Installation Requirements Cozy heat exchangers can be mounted in one of two configurations: either flat on the ground, or vertically. Reference Figure 19. • Supply ventilation cross-sectional area of at least 29in2 (74cm2) must be supplied to each heat exchanger. •...
  • Page 16 • In order to provide sufficient ventilation, the return air registers must be the same size, or larger, than the outlet air registers. Heat Exchanger Locations and Clearances • Position the heat exchangers so that even heat is distributed throughout the coach interior. •...
  • Page 17 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 18: Mounting The Heat Exchangers

    Mounting the Heat Exchangers 1. Cut out a 2.5” H x 10” W (7cm x 26cm) opening for each heat exchanger outlet and cold-air return grate as shown in Figure 25. 2. Mount each heat exchanger permanently into place. There are 4 tabs on both sides - see Figure 22. 3.

  • Page 19: Wiring The Heat Exchangers

    Wiring the Heat Exchangers This section will explain in detail how to wire the heat exchangers for optimal functionality. Do not deviate from these https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 20 If a deviation is required, contact Aqua-Hot Heating Systems prior to installing these exchangers for express permission to proceed with modifications. 1 1. Wire each heat exchanger (in a heating zone) in parallel to one another as shown in Figure 30.
  • Page 21 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 22 Once all heat exchangers have been mounted, plan the routing of the plumbing lines from each heating zone to the Aqua-Hot. The following guidelines should be used when planning the coolant loop(s) for the heating zone. The order of the heat exchangers should consider priority on the loop(s). Failure to adhere to these installation principles can hinder the operation of the heat exchangers.
  • Page 23 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 24 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 25 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 26: Engine Preheat

    • The engine’s coolant should be allowed to flow as freely as possible to maximize the Aqua-Hot’s engine preheating system. • The engine’s inlet port is where the heated coolant is transported to the engine block from the Aqua-Hot. This port should be a high connection point on the engine block. Refer to Figure 39.
  • Page 27 • The engine’s outlet port is where the engine’s coolant is transported to the Aqua-Hot. This port should be a low connection point on the engine block or a pressure outlet port on the engine’s water pump (Figure 39). • Ensure that the engine preheat inlet and outlet hoses are not placed too close to the engine’s turbocharger.

  • Page 28: Fuel System

    Fuel System Diesel Fuel System The following section outlines the requirements for diesel fuel delivery to the Aqua-Hot unit. Read and adhere to all of the outlined requirements to ensure best, and safest performance of the Aqua-Hot. A kinked fuel line (return side) will increase the fuel pressure to hazardous levels and may cause a fuel line to rupture. A kinked fuel line could also severely damage the diesel burner’s internal fuel system.
  • Page 29 Figures 42 & 43. • All fuel-fitting hardware (at the vehicle’s fuel tank: fuel filter and Aqua-Hot fuel parts) must be ¼” NPT or greater with a ¼” barbed fitting. Fuel fittings less than ¼” NPT may restrict fuel flow, thereby compromising the diesel burner’s performance.
  • Page 30 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 31: Domestic Water System

    • Reference A119.2/NFPA 501C Standard on Recreational Vehicles 1993 Edition for relevant regulatory information regarding the design of Domestic Water Systems. • The Aqua-Hot is equipped with a pressure relief valve and a tempering valve in order to provide safe hot water without chance of scalding or an over-pressurized system.
  • Page 32 The tempering valve is integrated into the cabinet of the Aqua-Hot, and is set upon departure from the Aqua-Hot factory. So long as the tempering valve is not modified, it will provide hot, non-scalding water. The Aqua-Hot is required to have a pressure relief valve that releases excessive pressure in the domestic water system.
  • Page 33 • Avoid mounting the fresh water tank thermostat’s bulb too close to the bay heat exchanger. • Aqua-Hot recommends using Heating Zone 4 for the Bay thermostat, as Zone Circulation Pump 2 is for Zone 4. However, you can wire to which ever zone of your preference.

  • Page 34: Switch Panel

    Room Thermostat Wiring 1. Run two 18-gauge wires from each room thermostat mounting location to the Aqua-Hot’s Reporter J1 & J9 Pins. 2. Insert the positive wire to the J9 Pin on the Reporter, and insert the ground wire to J1 Pin.
  • Page 35 as the regulation of authorities having jurisdiction and CSA Standard B139. Switch Panel Mounting 1. Cut out a 3.75” W x 1.25” H opening for the switch panel plate. Reference Figure 50. 2. Once the switch panel has been completely wired, permanently mount the switch panel in place. 3.
  • Page 36 Introduction to Wiring Wiring the Aqua-Hot This section will introduce the basic considerations, practices, and information necessary to wire the Aqua-Hot to any relevant coach-side systems. J8 Plug: The J8 plug is responsible for connections that pertain to sensor monitoring within the coach, and is standardized across https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 37 Reporter-bearing Aqua-Hot heating systems. J1 Plug: The J1 plug manages heating zone inputs from the coach. Heating Zone 1 is reserved electrically for the “Living Room - Kitchen Heating Zone” (Heating Loop 1) ONLY. Heating zones 2, 3, & 4 are reserved electrically for the “Bathroom, Fresh Water Tank, and Bedroom Heating Zone”...
  • Page 38 J7 Plug: The J7 plug manages zone fans and the burner switch indicator light.. https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 39 J9 Plug: The J9 plug is an optional use terminal that provides constant 12V DC current to any attachments which may be added to the coach. https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 40 J3 Plug: J3 serves as the RV-C connection to the coach side comfort system (if applicable). The RV-C indicator light located on the back of the Reporter serves as a valuable diagnostic tool when the need to determine RV-C functionality arises. https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 41 The J3 plug connects to the on-board RV-C system of the coach (if applicable). The RV-C indicator light located on the back of the Reporter serves as a valuable diagnostic tool when the need to determine RV-C functionality arises. The J3 Plug is a 4-pin connector with self-contained power pins.
  • Page 42 The parts listed above can be purchased from any major electronics retailer. Only the parts listed above are approved for use in the Aqua-Hot. J2 Plug: The J2 Plug is responsible for managing return signals from within the coach. https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 43 Aqua-Hot Reporter The Aqua-Hot Reporter is a new generation of command and control module that manages all functions of the Aqua-Hot from start-up to shutdown. The previously used electronic control board has been retired on new units in favor of the Reporter.
  • Page 44 This allows specific Aqua-Hot coolant tank temperatures to be displayed on the Reporter, and relayed to the on-board comfort control systems (if the coach manufacturer installs one). The tank temperature sensor allows more granular control of the Aqua-Hot by switching away from the static temperature limitations imposed by the previous control thermostat.
  • Page 45 Aqua-Hot I/O The Aqua-Hot I/O page will show the current status of elements, sensors, and components within the Aqua-Hot itself. Heat Testing: The heat testing page of the Reporter will allow the electric and burner heating sub-systems to be independently activated for troubleshooting and testing purposes.
  • Page 46 Loss of 6 consecutive signals from the RV-C network will trigger the Reporter to deactivate the Aqua- Hot. This serves as a safety feature to ensure that the Aqua-Hot does not continue to operate if the coach loses power. Once https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 47 There is a slot located at the bottom of the Reporter which serves as access for the harness and power connections. Take these into consideration when choosing the mounting location for the Reporter. Circular dimensions are edge to center. Aqua-Hot sheet metal cabinets have reference features indented into them for mounting the Reporter to the Aqua-Hot if desired. Boost Pumps Boost pump functionality has changed with the implementation of the Reporter 2.0.
  • Page 48 Minimum Voltage........11.0V DC Maximum Voltage........15.0 V DC Minimum Current..........75mA Maximum Current...........15A Please note that the minimum current rating is the minimum requirement for what will operate the Reporter. Operating at this current rating will not provide sufficient power to any components dependent upon the Reporter. Input Load currents Zone Thermostats (each)..........appx.
  • Page 49 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 50: Manual Mode

    RV-C Network Connectivity The Reporter was designed to interface with the coach-side RV-C network to aid in the Aqua-Hot’s integration into the onboard RV-C network. There is an indicator light on the back of the Reporter which shows the current status of the Reporter’s connection to the RV-C network. This will be useful when diagnosing potential problems with the coach-side RV-C network.
  • Page 51 - “FW: 2.0”. This mode can accessed under the test page of the Aqua-Hot Reporter (see below). Once the test page is open, select the MANUAL MODE and select “NEXT”. Manual mode will continue to run for up to 3 days without any user intervention.
  • Page 52 Connecting the 450D to 12V DC Power This section will outline the requirements, steps, and information necessary to connect the Aqua-Hot to the vehicle’s 12V DC power system. Follow all guidelines and pay attention to all notes contained herein. Failure to adhere to these guidelines can inhibit unit performance, and may cause damage to the Aqua-Hot and/or the coach.
  • Page 53 • Select the correct wire gauge for installation referencing ANSI/RVIA-LV - see Page 45. • Protect the Aqua-Hot from over-current and shorting by incorporating a 20A breaker (minimum) to the Aqua-Hot’s coach-side power connection. • The 12-volt supply to the heater must be routed directly from the battery.

  • Page 54: Filling The Aqua-Hot

    Before the first activation of the Aqua-Hot, fill the unit with antifreeze and water heating solution. Without the solution present, the Aqua-Hot will not operate, it will not deliver hot water, and it will not deliver heat. Follow the directions below to fill the Aqua-Hot with antifreeze and water heating solution.
  • Page 55 -A bucket or pale 2. Fill the bucket with the heating solution. Ensure the fluid expansion tank is connected to its port on the Aqua-Hot. 3. Open the Aqua-Hot’s drain valve located at the front of the heater. Reference Figure 78.
  • Page 56 Purge Procedure: 1. Locate the fluid expansion tank of the Aqua-Hot. As any air is purged, it will exit through to this expansion tank. 2. Locate a gallon of glycol antifreeze. This will be used to top-off the fluid expansion bottle as air is purged from the https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu…...
  • Page 57 system. 3. Navigate to the “PUMPS” page of the “TESTING” section on the Reporter as displayed below. 4. Tap each of the pumps to independently activate them, beginning the heating loop purge procedure. These pumps will remain active for a maximum of 5 minutes. They will need to be reactivated as needed until the purge procedure is complete (at least 20 minutes).
  • Page 58 3. Confirm the system and heating loop has been properly purged of any air. 4. Make sure to flush the domestic water system thoroughly with clean water prior to use. 5. Reinstall the Aqua-Hot’s main access cover and the fastener, which secures the front of the Aqua-Hot’s access cover to the mounting tray.
  • Page 59 8. Move the diesel burner switch to the ON position, and leave it on in order to activate the diesel burner. 9. Move the Aqua-Hot’s electric element switch to the ON position in order to supply 120V AC power to the electric heating element.
  • Page 60 Winterizing the Aqua-Hot The Aqua-Hot’s domestic water heating system must be completely drained of domestic water at any time the heater is stored where freezing temperatures may be experienced. Please follow these instructions when winterizing the AquaHot domestic water heating system. Reference Figure 84 for a system overview.
  • Page 61 (bleach or liquid bleach). Using products containing bleach, including water refreshers, may cause corrosion of the domestic water lines, resulting in a catastrophic failure of the Aqua-Hot system by creating leaks that cannot be repaired. This damage is not covered by the Aqua-Hot warranty.

  • Page 62: Operational Flow Diagram

    Operational Flow Diagram https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 63 Wire Sizes System Schematics https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 64 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 65: Antifreeze Types

    The following information addresses the necessary usage of a propylene glycol based “boiler” type antifreeze in the Aqua-Hot. Propylene glycol is a safer alternative to the more toxic ethylene glycol antifreeze; however, as mandated by IAPMO (International Association of Plumbing and Mechanical Officials), only propylene glycol based “boiler” type antifreezes deemed “Generally Recognized As Safe”...
  • Page 66 Although RV & Marine antifreeze is often “Generally Recognized As Safe” by the FDA, it should never be used in the Aqua-Hot’s Hydronic Heating System. This type of antifreeze is not formulated to transfer heat, which is essential to the heating system’s functionality and does not contain rust inhibitors.
  • Page 67 Rust and Anti-Corrosive Inhibitors Another major function of antifreeze solution is to provide protection to the internal metal components of the Aqua-Hot Hydronic Heating System from corrosion and rust. Antifreeze is able to perform this function by the addition of rust and anticorrosive inhibitors, which are designed specifically to activate in a water solution.

  • Page 68: Measuring Antifreeze Using A Refractometer

    Measuring Antifreeze Using a Refractometer Properly Apply Antifreeze to the Prism Assembly Use the guide below to properly apply the propylene glycol mixture to the prism assembly of the refractometer. Once 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 until the boundary line labeled “Propylene Glycol”...
  • Page 69 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

  • Page 70: Parts And Accessories

    Parts and Accessories ELE-000-509 AHE-450-DE5 Panel, Switch, 3 Position ASM ELX-700-007 EXE-103-OEX https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 71 Room Thermostat, Positive Off Heat Exchanger, Cozy III EXX-013-100 EXX-013-105 Nozzle, Round 4” w/o Connector, Black Nozzle, 4” Round w/ 2 ½” Connector, Black https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 72 EXX-006-502 PLE-070-401 Grille, Small, 3.5” x 8.5”, Black Tank, 3 QT, Expansion Assembly PLX-000-835 PLX-100-836 Fitting, Reducer ¾” to ⅝” Black Nylon Pump Mounting Bracket https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 73 PLX-200-103 PLX-284-74V Fitting ½” (M) NPT x ¾” Barb Black Nylon Hose, Molded, Elbow 90° PLX-664-750 PLX-803-000 https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...
  • Page 74 Fitting, Exhaust Nipple, 1 ½” x 3” NPT Fitting, Straight, ½” PEX x ½” (F) NPT PLX-CTB-270 PLX-A51-106 Clamp, Hose, Constant Tension, 0.75” Bend Support, ⅝” PLX-T44-006 SME-102-000 Fitting, Insert Modified Brass Cozy Plenum Assembly https://tiffin-motor-homes-prod.mindtouch.us/Technical_Support/Class_A/2024/Allegro_Bus/35_CP/Component_Manuals/Aqu… Updated: Fri, 21 Jun 2024 04:59:37 GMT Powered by...

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