Hydronic Heater Model Information

 

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Model 431
AHE-450-DE2
AHE-450-DE3
AHE-450-DE4
HHE-500-04M
HHE-200-09E

Hydronic Heater Model Information


This information compiled by Roger Berke and is a work in progress.

If you have photos / information, I would appreciate corrections or additions.

 

Scroll Down!   Models are listed below.  This page is very long.
 

Aqua-Hot Models
431/12 - Prior to serial 94180 AHE-101-000 AHE-100-03S AHE-600-D03
431/12 - Prior to serial 98571 AHE-100-00S AHE-100-04S  
431/12 - After serial 98571 AHE-100-01S AHE-600-D01  
411/12 AHE-100-02S AHE-600-D02  


Hydro-Hot Models
2001-E
HHE-500-03
HHE-500-07 450-D02 400-D01
HHE-500-04 HHE-500-08 450-D03  
HHE-500-05 HHE-500-09 450-D04  
HHE-500-06 450-D01    

 

Propane Models

AHE-375-P01

 

Beckett Models

AHE-375-D01

AHE-525-D01

AHE-525-D02

 

Aqua-Hot Models
Model 431/12 - Prior to serial 94180 - Webasto 2010 - Uses ethylene glycol coolant

 

  Model 431/12 - Prior to serial 98570 - Webasto 2010 - Uses ethylene glycol coolant

   There were mid model changes. See more information for thermostat and mechanical connection details.

This model was produced until mid 1998 through serial 98571. Replaced by model below, "After Serial 98571".   The 24-volt version of this model is 431/24

  Model 411/12  Webasto 2010 - Uses ethylene glycol coolant

   Exactly like 431/12 with the following changes

  • 1 zone pump and NO engine circulation pump

 

      Webasto removed in this photo

 

   This model was produced until mid 1998

   Thanks to Michael Pierce for photo

 

 
  Model 431/12 - After serial 98571 - Webasto 2010 - Uses ethylene glycol coolant

   Exactly like 431 prior to serial number 98571 with the following changes

  • Pumps are slightly different (replace with same part number as 431 above)
  • Engine preheat hoses, fuel hoses, water connections go through bulkhead fittings.

 

     Click on photo for larger view

 

 

 This model was produced until mid 1999 and was replaced by the AHE-101-000.  The 24-volt version of this model is 431/24

 

  Model AHE-101-000     Webasto 2010 - Uses ethylene glycol coolant

   Exactly like 431 prior to serial number 98571 with the following changes

  • No check valve on fuel return line

 

Looks Like 431/12 after 98571 above

  Model AHE-100-00S     Webasto 2010 - Uses ethylene glycol coolant

  Exactly like AHE-101-000 with the following changes

  •  

 

  This model was produced until mid 2000 and was replaced by the AHE-100-01S.


Looks like 431 above - Except Thermostats
 Model AHE-130-00X     Webasto 2010 - Uses ethylene glycol coolant

  Exactly like AHE-100-00S except has 6 thermostats and dual elements

  Dual electric thermostats (one set for each electric element)

  • Uses two -  Electric Control (Red Dot) ELE-010-198
  • Uses two - Electric High Limit (White Dot) ELE-254-010
  • Dual 2000 watt 120 volt elements.

 

  Model AHE-100-01S   Webasto 2010 - Uses ethylene glycol coolant

  Exactly like model AHE-100-00S with the following changes

 

 This model was produced until mid 2001 and was replaced by the AHE-100-02S.

 

 

  Model AHE-100-02S   Webasto 2010 - Uses ethylene glycol coolant

   Exactly like model AHE-100-01S with the following changes

 

   This model was produced until mid 2002 and was replaced by the AHE-100-03S.

  Model AHE-100-03S   Webasto 2010 - Uses propylene glycol coolant (after serial 03-774) 

   This model is a MAJOR redesign of AHE-100-02S

  • Electronic Control Board! - First Aqua-Hot Model with Electronic Control Board
  • Uses propylene glycol coolant
  • Float switch (Plastic) replace with Brass float - ELE-800-002 or liquid sensor ELE-200-001-HYD
  • On this model the entire drain valve is plastic.  Replace with Drain Valve Kit
  • Pumps are different on this model.  Uses the PLE-100-821 pump
  • Uses one control thermostat instead of the two in the previous models.  ELE-800-100
  • There is high limit thermostat for Diesel and a high limit for electric.  They are the same ELE-HLT-322
  • Mixing valve is changed.  PLX-09P-100

   This model was produced until mid 2005 and was replaced by the AHE-100-04S.

  Model AHE-100-04S   Webasto 2010 - Uses propylene glycol coolant

   Exactly like AHE-100-03S except

  • On this model there is a short brass nipple, then the rest of the drain valve is plastic.  Replace with Drain Valve Kit

     Click on photo for larger view

   This model was produced until mid 2007 and was replaced by the AHE-600D.

 

  Model AHE-600-DE1   Webasto 2010 - Uses propylene glycol coolant

    Exactly like AHE-100-04S except

  • White powder coated case
  • Pumps are mounted to case with Nylatch fittings
  • Drain valve is completely brass

 

Looks like AHE-600-DE1 above

  Model AHE-600-DE2   Webasto 2010 - Uses propylene glycol coolant

    Exactly like AHE-600-DE1 except

  • No radiator cap (uses zero pressure system)
  • Has interlock switch (will not allow operation with cover off)
  • Solid steel fuel lines (no rubber hoses)
  • Mounts in coach in "tray"

  Model AHE-600-DE3   Webasto 2010 - Uses propylene glycol coolant

   This model is a redesign of AHE-600-DE2  

  • Redesigned combustion chamber - first Low Emission Model in this series
  • Check valves are now horizontal between the pump and the boiler tank.
  • Mixing valve moved into case right next to boiler tank. Access through front / side.
  • A/C high limit thermostat - ELE-HLT-425
  • Dual Diesel high limit thermostats - ELE-HLT-425
  • Cover for thermostats much larger
  • A/C power connection / location different
  • Check valves are horizontal between the zone pump and the boiler tank
  • Uses 'Liquid Sensor' - no mechanical float switch - ELX-800-003 - Liquid Sensor

 

 

Hydro Hot Models

    Model 2001-E    Webasto 2010 - Uses ethylene glycol coolant

    ?? Prototype for Hydro-Hot series

 


HHE-500-03M

  Model HHE-x00-03x    Webasto 2010 - Uses ethylene glycol coolant
  • Open zone pumps (no plastic cover)

  • Engine preheat pump is PLX-CM3-P71 - Pump, Circulation, w/Bracket, Engine Preheat, 12 VDC - List price $1,081.75.

  • Check valves are outside of the case.

  • Has large radiator cap.  PLX-403-000

  • Must use plastic float (PLX-01G-ML7) (or float sensor - ELE-200-001-HYD).

  • NO drain valve

  • Used the PLE-100-830 - Stir Pump. NOT AVAILABLE use PLE-100-830-HYD - Pump, Stir Kit - Cooper Standard Pump

  • Uses ‘clip on’ Low Temperature Cutoff Thermostat - ELE-LTC-505

  • Electric system uses ELX-228-1A1 - Relay, SPST, 12 VDC/30 Amp. Neutral wire is switched through relay and high limit. Upgrade kit available, here: ELE-630-002-HYD

  • Exhaust pipe connects in different location than later models.

  • Set fuel pressure on Webasto to 135# instead of the 'standard' 145# (exhaust different)

HHE-500-04M

Click on photo for additional views

  Model HHE-x00-04x    Webasto 2010 - Uses ethylene glycol coolant
  • Open zone pumps (no plastic cover)

  • Engine preheat pump is PLX-CM3-P71 - Pump, Circulation, w/Bracket, Engine Preheat, 12 VDC - List price $1,081.75.

  • Check valves are outside of the case.

  • Has large radiator cap.  PLX-403-000

  • Must use plastic float (PLX-01G-ML7) (or float sensor - ELE-200-001-HYD).

  • NO drain valve

  • NO stir pump

  • Uses ‘clip on’ Low Temperature Cutoff Thermostat - ELE-LTC-505

  • Electric system uses ELX-228-1A1 - Relay, SPST, 12 VDC/30 Amp. Neutral wire is switched through relay and high limit. Upgrade kit available, here: ELE-630-002-HYD

  • Exhaust pipe connects in different location than models starting with 06x model.

  • Set fuel pressure on Webasto to 135# instead of the 'standard' 145# (exhaust different)


Looks like HHE-x00-04x above

  Model HHE-x00-05x    Webasto 2010 - Uses ethylene glycol coolant
  • Open zone pumps (no plastic cover)

  • Engine preheat pump is PLX-CM3-P71 - Pump, Circulation, w/Bracket, Engine Preheat, 12 VDC - List price $1,081.75.

  • Check valves are outside of the case.

  • Has large radiator cap.  PLX-403-000

  • Must use plastic float (PLX-01G-ML7) (or float sensor - ELE-200-001-HYD).

  • NO drain valve

  • NO stir pump

  • Uses ‘clip on’ Low Temperature Cutoff Thermostat - ELE-LTC-505

  • Electric system uses ELX-228-1A1 - Relay, SPST, 12 VDC/30 Amp. Neutral wire is switched through relay and high limit. Upgrade kit available, here: ELE-630-002-HYD

  • Exhaust pipe connects in different location than models starting with 06x model.

  • Set fuel pressure on Webasto to 135# instead of the 'standard' 145# (exhaust different)

  • Has check valve on both fuel supply and return.  Check valve on return line should be removed.

  Model HHE-x00-06x   Webasto 2010 - Uses ethylene glycol coolant
  • Exhaust pipe goes straight down from bottom of combustion chamber.  Has same footprint as 07x, 08x, 09x and model AHE-450 models.  Set fuel pressure on Webasto to 145#

Looks like HHE500-06M above

  Model HHE-x00-07x   Webasto 2010 - Uses ethylene glycol coolant

  • Open zone pumps (no plastic cover)

  • Engine preheat pump is PLX-CM3-P71 - Pump, Circulation, w/Bracket, Engine Preheat, 12 VDC - List price $1,081.75. Upgraded Cooper Standard pump is available.

  • Check valves are directly over the circulation pumps.

  • Has large radiator cap.  PLX-403-000

  • Must use plastic float (PLX-01G-ML7) (or float sensor - ELE-200-001-HYD).

  • NO drain valve.

  • Used the PLE-100-830 - Stir Pump. NOT AVAILABLE use PLE-100-830-HYD - Pump, Stir Kit - Cooper Standard Pump

  • Uses ‘clip on’ Low Temperature Cutoff Thermostat - ELE-LTC-505

  • Electric system uses ELX-228-1A1 - Relay, SPST, 12 VDC/30 Amp. Neutral wire is switched through relay and high limit. Upgrade kit available, here: ELE-630-002-HYD

     Serial number .... to 3652

  Model HHE-x00-08x   Webasto 2010 - Uses propylene glycol coolant (after serial 03-653)

   This model is a MAJOR redesign of HHE-x00-07x

   Exactly like HHE-x00-07x except

     Serial number 3653 to .....

  Model HHE-x00-09x   Webasto 2010 - Uses propylene glycol coolant

   Exactly like HHE-x00-08x except

   Click on photo for larger image.

 

  Model AHE-450-DE1   Webasto 2010 - Uses propylene glycol coolant

   Exactly like HHE-x00-09x except

  • White powder coated case
  • Drain valve is completely brass

 

  Model AHE-450-DE2   Webasto 2010 - Uses propylene glycol coolant

  This model is a major redesign of the Hydro-Hot series

   Exactly like AHE-450-DE1 except

  • No radiator cap (uses zero pressure system)
  • Has interlock switch (will not allow operation with cover off)
  • Solid steel fuel lines (no rubber hoses)
  • Pumps are mounted to case with Nylatch fittings
  • Drain is on a rubber hose
  • Mounts in coach in "tray"
  • Redesigned A/C connector
  • Check valves are horizontal between the zone pump and the boiler tank
  • Uses 'Liquid Sensor' - no mechanical float switch - ELX-800-003 - Liquid Sensor
  • Control thermostat - (was ELE-014-003 Now) ELE-014-005
  • A/C high limit thermostat - ELE-800-108
  • Dual Diesel high limit thermostats - ELE-HLT-425
  • Low Temperature cutoff thermostat - ELE-LTC-608

    More Photos

   Serial Numbers ???? - 100277

  Model AHE-450-DE3 and AHE-450-DW3   Webasto 2010 - Uses propylene glycol coolant

    Exactly like AHE-450-DE2 except

  • Redesigned combustion chamber - first Low Emission Model in this series

 

    More Photos

 

  Serial Numbers 110278 - 110278
  The DW3 models were made for Winnebago

 

  Model AHE-450-DE4    Webasto 2010 - Uses propylene glycol coolant

    Exactly like AHE-450-DE3 except

  • Zone pumps, stir pump and engine preheat pumps are the Cooper Standard pumps.
  • Zone pumps prior to serial A450-110279 are Gorman Rupp pumps.

      More Photos

 

   Serial Numbers 110279 -

 

  Model AHE-400-D01    Webasto 2010 - Uses propylene glycol coolant

   Similar to AHE-450-DE4 except

  • No engine preheat!
  • No 'stir pump'
  • Note: Cooper Standard Circulation Pumps
  • Larger - 5.4 gallon boiler tank, a 32% increase of stored heat over 450 models.
  • Rated at 1.25 gpm hot water

 

Propane Burner Models
  Model AHE-375-P01    PROPANE Model - Uses propylene glycol coolant

Beckett Burner Models
    Model AHE-375-D01, D02, D03  
  Model AHE-525-D01, D02  - Also model H2E-200-01E
  • Uses Beckett burner instead of the more common Webasto
  • Nozzle - WPX-886-41A
  • Fuel Filter - Should Be - Garber Filter FLE-120-100

 


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