GENERAL INFORMATION — 1
6
2008 IMPERIAL
Desiccant -
A granular substance that has
a high af
fi
nity for water and is used to
retain moisture from the air stream
fl
owing
through the air dryer cartridge.
Direct Current (DC) -
Power that is
stored in a battery bank or supplied by
photovoltaics, alternator, chargers and DC
generators. Direct current is also known as
battery power. Current only
fl
ows one way.
Drain Trap -
This is a curve that is in all
drains. Water is trapped in the curve and this
creates a barrier so tank odors cannot escape
through the drain.
Dry Camping -
Camping in the motorhome
when there is no city water hook-up or shore
power. In other words, using only the water
and power that is in the motorhome and not
from another source.
Drying Cycle -
The time during which the
air dryer cools,
fi
lters and removes moisture
from the air delivered by the air compressor.
The drying cycle begins and ends the same
as the compressor load cycle.
Dump Station -
A site where the waste
(grey) and sewage (black) tanks can be
drained. In most states it is illegal to drain
waste tanks anywhere other than at a dump
station.
Dump Valve -
Another name for the
T-handle valve used to drain the sewage
(black) and waste (grey) tanks.
Egress Window -
The formal name for
the emergency exit window located in the
rear of the motorhome. Egress windows are
identi
fi
ed by their red handles.
Full Hook-Up Site -
A campground that has
city water, shore power and sewer hook-ups
or connections available.
Grey Water -
Term associated with the
waste water holding tank. Water from the
sink drains, the shower and the washer-dryer
(if equipped) go into this tank.
House Battery -
Powers 12 Volt DC lights
and accessories inside motorhome.
LED (Light Emitting Diode) -
Indicator
light.
Liquid Lead Acid Battery (LLA) -
A type of battery that uses liquid as an
electrolyte. This type of battery requires
periodic maintenance such as cleaning the
connections and checking the electrolyte
level.
Low Point Drain -
The lowest point in the
plumbing. Drains are placed here so that
water will drain out of the lower end of the
motorhome. Drains must be closed when the
water tank is
fi
lled.
OEM -
Original Equipment Manufacturer.
OHM -
Unit for measuring electrical
resistances.
Ohm’s Law -
Expresses the relationship
between Volt (E), amperes (I) in an electrical
circuit with resistance (R). It can be
expressed as follows: E = IR. If any two of
the three values are known, the third value
can be calculated by using the above formula.
Potentiometer -
A device for measuring
an unknown potential difference or
electromotive force.
Pounds Per Square Inch Gauge (psig) -
Pressure measured with respect to that of the
atmosphere. This is a pressure gauge reading
in which the gauge is adjusted to read zero
at the surrounding atmospheric pressure. It
is commonly called gauge pressure.
Purge -
The initial blast of air
(decompression) from the air dryer purge
valve at the beginning of the air compressor.
Purge Cycle -
The time during which the air
dryer is undergoing purge and regeneration.
This cycle starts at the beginning of the
compressor unload cycle and normally ends
well before the beginning of the compressor
load cycle.
Regeneration -
The mild back
fl
ow of air
through the air dryer and out the purge valve
that begins immediately after the purge
and normally lasts 10 to 15 seconds. This
back
fl
ow of air, from the air system and
through the air dryer, removes moisture from
the desiccant cartridge and prepares the air
dryer for the next compressor load cycle.
