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Furnace Blower Controls
To control the balance of heat between the boat's areas (particularly the head
compartments) use the individual fan control switches by each fan. Do not turn more
than one or two fans off! Better to keep them at least on "low", lest the furnace run but
not be able to deliver its heat!
As you see, this furnace system is flexible! As long as the batteries can
support the modest DC requirement of the fans and furnace, you will have plenty of quiet heat. In fact,
this use of the house batteries' energy for air circulation is a good reason to limit use of the furnace to
times when passengers are awake, unless the boat has shore power available.
Furnace Exhaust Warning
Note the exterior location of the exhaust aft on the port side
just aft of the salon door! Care should be taken not to block
this outlet with fenders or while rafting due to the very high
temperature of the exhaust gases from the furnace.
Furnace Problems
If battery voltage gets too low the furnace will shut down to avoid running the batteries dead.
After the batteries are fully charged, you must reset the furnace control by turning the main furnace "on-
off" switch on the thermostat "Off", wait ten seconds, and then "On" again. The furnace then should
operate.
Furnace Thermostats
These operate conventionally.
(1) A switch on the lower front must be "On" for the
thermostat to function and the furnace tro heat that
area.
(2) The readout shows room temperature.
(3) Touching either the "Up" or "Down" button alongside
the digital readout will "wake up" the thermostat, and it will show its heat setting.
Section 4M: Furnace & Air Conditioning 4.36
A Diesel Furnace Thermostat.
Arrow points to :On-Off" switch.
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