WARNING
At filling stations and fuel depots, the heater must be switched off
as there is a potential danger of explosions.
WARNING
Where flammable fumes or dust may build up (e.g. in the vicinity of
fuel, coal, wood, cereal grain deposits, or similar situations), the
heater must be switched off to prevent explosions.
CAUTION
Before switching the Sphero heater on, open any shutoff valves
and set vehicle heater controls to the HOT position.
The digital timer with three time settings permits the Sphero heater to
be switched on and off instantly, or automatically at 3 programmable
starting times.
The operating time of the heater can be pre-selected. It is possible to
program three different heating times according to your individual
needs.
Only one preset starting time can be activated at any one time. When
the ignition is switched on, the current time of the day and the day of the
week are displayed.
When the heater is in operation, the display and the buttons of the timer
are illuminated.
Programmed Heater Operation
Three memory locations numbered 1 to 3 are available. Each memory
location can be assigned a given time together with the day of the
week.
Pre-selected Starting Times
The pre-selected starting time is the time at which the heater will be
switched on automatically.
NOTE: Recommended that memory locations 1 and 2 be used for
presetting starting times within a 24-hour period of setting the timer.
Memory location 3 can be reserved for a starting time within the next
seven days of setting the timer. Location 3 is useful for occasional
weekend or field trip operations outside of the normal schedule. By
repeatedly pressing the program selection button on the timer, starting
time pro- gram 1, 2 or 3 can be viewed and preset.
Operating Time
The period of time during which the heater is in operation is referred to
as the operating time. The heater remains in operation for as long as
the operating time has been preset. Heater operation can be
preselected for any time from a minimum of 1 minute (a minimum of 10
minutes is recommended) to a maximum of 120 minutes (factory preset
is 60 minutes).
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