Airstream A-Series 2006 Owner's Manual page 50

PLUMBING & HEATING
The Emergency Cutoff lamp will indicate when there is a low liquid level in the heat tank,
a strong impact to the unit, or when power has been disconnected from the system for
an extended period of time. Low voltage supply may also trip the Emergency Cutoff
Switch, causing the Hydro-Hot system to cease operation because the RV house bat-
teries have reached a state of charge insufficient to operate various sub-systems that
comprise the Hydro-Hot system.
In the event a red light illuminates in the Emergency Cutoff lamp, the electronic control-
ler must be manually reset. Using a small screwdriver, or one end of a paperclip, reset
the Low Voltage/Reset button located on the electronic controller.
HEATING
The are three thermostats that are used to control heat to areas of the motorhome.
The bath/bedroom area thermostat is located under the medicine cabinet.
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For the basement area, a thermostat knob is located next to the Control Panel in the
basement compartment.
The living area heat is controlled by the air conditioner Comfort Control Center
mounted on the galley wall. Push the zone button to the furnace mode and adjust the
thermostat.
When there is a call for heat, the system will activate the circulation pumps only after
confirming there is no demand for domestic hot water. While interior heat is supplied
through the Hydro-Hot system, the fan speed selector switches (certain models) will
have power applied and produce an audible sound when engaged.
EXPANSION TANK
The expansion tank, a clear plastic bottle, resembling a small version of the engine
coolant reservoir, is located in a curbside basement compartment. When the Hydro-
Hot system is at operating temperature, visually inspect the coolant level of the tank on
a monthly basis, and refill as needed. Refer to the manufacturer's manual for specific
instructions on system operations, winterization procedures and maintenance require-
ments.
SERVICE
Once per year, have the Hydro-Hot system tuned up by a qualified technician to assure
ongoing performance of the system when needed. When storing the RV during freez-
ing temperatures, winterize by draining the Hydro-Hot system of water. The Hydro-Hot
system is still available for use in interior heating during storage following winteriza-
tion.
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