Roadmaster 98300 Installation Instructions Manual - Wire The Air Compressor
Wire the air compressor
Figure 3
Figure 2
continued from preceding page
choose a mounting location for the compressor where
a ½" hole can be drilled near the drain valve, through
to the exterior of the motorhome.
CAUTION
Do not mount the air compressor…
• in a slide-out, or near moving components — the
wiring and/or the compressor may detach.
• near any heat source such as the engine, ex-
haust system or muffler — excessive heat will dam-
age the wiring, tubing or other components, which
will cause the compressor to fail.
• where it will be exposed to the elements — if
the air compressor is mounted near the front grille,
for example, it may draw an excessive amount of
dirt, dust or road debris into the air tank and then
into the air lines, which may damage components
connected to the air lines.
Failure to follow these instructions may cause
non-warranty damage to the air compressor, the air
cylinder or other components of the braking sys-
tem.
2. Position the air compressor at the mounting loca-
tion you have chosen. Using the four pre-drilled holes
in the housing (one at each corner) as templates, drill
four pilot holes. Before drilling, make certain you will
not damage any components on the other side.
Do not attach the air compressor now — in most
cases, it will be considerably easier to connect the wir-
ing (and, later, the air lines) with the compressor loose.
3. Route the bare end of the bonded pair of black and
red wires from the motorhome starting battery to the
air compressor. (If the motorhome has more than one
starting battery, route the wire from either battery.)
CAUTION
Do not use an auxiliary (“house”) battery as a
power source for the air compressor — the auxiliary
3
battery may be near capacity. Any additional power
draw may blow the fuse(s) to electrical components
already connected to the auxiliary battery.
Avoid moving parts (slide-outs, sliding generators,
sliding battery trays, etc.), sharp edges or “hot” com-
ponents, such as the engine or exhaust system, as
you route the wire from the starting battery to the air
compressor. Where appropriate, use one or more of
the included wire ties to secure the wire in place.
4. At the air compressor, cut the bonded pair of black
and red wires to length. Using one of the small ring ter-
minals, attach the red wire to the terminal block screw
opposite the pre-attached red wire (Figure 2.)
Next, use another small ring terminal to attach the
black wire to the terminal block screw opposite the
pre-attached black wires (Figure 2).
Note: due to manufacturing variances, the preat-
tached red and black wires may be mounted to different
terminal block screws than those shown in Figure 2. If
this is the case, match color to color — red wire opposite
red wire, and black wire opposite black wires.
5. At the starting battery, insert the supplied 20-amp
continued on next page