RV Hydronic Heater Repair

Model

AHE-525-D01 and D02

This model may also be known as:

H2E-200-01E

This model of Aqua-Hot uses the special Camco -100 Boiler coolant.

This is New Model

This is the first model in the 525-D series

this is "Low Emissions" model

Low emissions model
NO RADIATOR cap - Zero pressure system
Has drain valve on short length of heater hose
Mixing valve is in different location (inside compartment to the right top of Webasto)
Fuel connections are on the top of unit, above pumps
Engine preheat connections are on top of unit
Has case interlock switch that will not allow burner to run until switch is depressed
High limit thermostats are now set to trip at 215°
Fuel lines are solid metal (no rubber hoses)
Aqua-Hot is installed in a 'tray' that is installed first. Aqua-Hot is then mounted in coach using this tray.
Has white fiber gasket installed between combustion chamber (that is bolted in) and Aqua-Hot.

Part Notes

Beckett parts are here: Parts - RV Hydronic Heater Repair - Beckett

Control Thermostat - ELE-014-005
Electric high limit thermostat - ELE-000-616-FRU
Control Board - ELE-PC4-010
Electric relay(s) - ELE-630-001
Zone and engine preheat pumps (are no longer available). Pump upgrade kit, here: PLE-100-905-FRU
Gasket that goes between the combustion chamber and the Aqua-Hot HDE-700-205
Gasket that goes between Beckett burner and combustion chamber HDE-700-200
This model uses the special GRAS (generally recognized as safe), Camco -100 Boiler coolant, here: MSX-300-270

Routine service parts and kits - Routine Service Parts Scroll down page for filter and nozzle packages. You should have the fiber gasket on hand in case you take the combustion chamber out. HDE-700-205 You should also have gasket that goes between Beckett burner and combustion chamber, here: HDE-700-200

Routine service note: The Aqua-Hot service directions clearly state that the combustion chamber should be removed each time unit is serviced. Most of the service people that I know remove the air swirler. They Inspect the inside of combustion chamber with flashlight. If there is very minimal carbon built up (which they find in most instances), they do not remove the combustion chamber.

Common Problems

There is Webasto Burner Upgrade for Beckett Burner Systems, here: Webasto Burner Upgrade for Beckett Burner Systems

Service Manual

On Aqua-Hot website AHE-525-D02