Dometic Battery-Powered Auxiliary Air Conditioning System - Manual (Page 8)

SPECIFYING
A SYSTEM FOR
DAY CABS
Day-cab trucks are also subject to clean-air regulations that restrict
idling time, and there is an increasing demand for engine-off air
conditioning solutions for these trucks as well as sleepers.
Dometic’s day-cab systems are designed to meet the space constraints
and capacity requirements of day cabs to meet typical usage patterns.
The day-cab system requires fewer batteries than a sleeper, since run
times are shorter. It also uses a slightly smaller alternator than the sleeper system.
The number of batteries needed will depend on the length of time you will need to run the air conditioner
between recharges. Note that the air conditioner normally will not run continuously, but will cycle on and off as
needed to maintain the selected setpoint. The 60% duty cycle in the table means that the air conditioner runs
60% of the time, and is off 40% of the time.
The outside condenser mounts horizontally or vertically on the back of the cab. The inside unit, containing the
compressor, evaporator and blower, is packaged in a molded composite cover and mounts between the seats
in the cab. The cover contains multiple air outlets which can be pointed to discharge in different directions. The
display/control and inverter control are mounted directly on the driver’s side of the unit for easy accessibility.
Day-cab unit between the seats
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