Jayco Precept 2018 - Furnace

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plumbing bypass valves so no water or antifreeze will enter the water heater. Then winterize
your RV waterlines with antifreeze as normal. (Refer to Winterizing the Plumbing System)
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Lime scale occurs as a result of precipitation from “hard” water. The appliance must
be decalcied regularly depending on water hardness and hot water consumption. The
decalcication process takes approximately 3 hours to complete. Appliance must be
ushed with clean water when nished. If decalcication is interrupted damage to the water
heater is possible. For safety reasons: once the process is started it must not be stopped
until the system has been rinsed. All operating modes of the appliance are blocked until
decalcication has been completed. When completed switch the water heater power OFF
then ON to return to normal operation.
   Decalcication must be done through your RV dealer for the Basic
model. Specialized equipment is required and cannot be easily done by the owner.
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Models with the interior rotary control dial have a “CLEAN” setting available. These
models also include a built in water consumption meter that will light the yellow LED on
the rotary dial when decalcication is required. The LED will go out briey every 7 seconds
indicating decalcication is necessary.
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1. Set the rotary dial inside the RV to OFF.
2. Turn the water pump OFF, turn water
supply OFF.
3. Open hot water faucet to relieve pressure
on the system.
4. Attach warning signs on all xtures that
decalcication is in process.
5. Open the exterior access door panel to the
“service” position.
6. Turn water heater power OFF.
7. Drain water out of the appliance and remove the inlet lter.
8. Place six (6) decalcication tablets in the water inlet lter as shown.
9. Re-install the water inlet lter and close the drain chute.
10. Turn water heater power switch ON.
11. Turn the water supply ON, turn water pump ON.
12. Fill the water system.
13. Open all xtures: toilet, showers, faucets.
14. When water ows steadily from all xtures, the system is vented.
15. Close all xtures.
16. Tablets dissolve in approximately 10 minutes. Run water only as long as necessary
when lling the water system. Tablets will turn the water slightly red.
 Using air pressure to blow out your Aqua Go water heater is
NOT recommended and may damage the appliance.
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