Question:
Need a recommendation for a roof top air conditioner for a small Class C (19
foot '78 Chinook).
Our current 2 year old roof ac is
a duo-therm brisk air that has the problem that the thermostat will not kick
in below about 68 degrees. It's probably living up to it's specs, for the
installation manual (which I didn't read before purchase as it was emergency
replacement air conditioner) states that thermostat only operates in the range
from 65 to 90, and there are no hidden adjustments we can find to change this
lower end.
We don't need a big compressor because of the small size of the RV, but we do
need a thermostat with settings more suited to us. Do you know of a rooftop
brand whose thermostat will allow it to keep cooling in the lower 60s?
It also should be low enough in power requirements that it will work when we
are plugged into only a 15 amp line, as most of our favorite campsites are
limited to that.
Answer:
Look closer- there will be an adjustment on the thermostat (a
set screw in the side). All of the thermostats are basically the same
no matter which manufacturer makes the whole unit- so don't throw out
a two year old unit.
There are after market "remote controls" that will give you a
wall mount thermostat.
Alternative solution: The thermostat on my Coleman roof unit DOES
have a calibration adjustment. It is recessed into the thermostat
unit next to the control shaft. It must be dismounted to access.
This adjustment has enough bite to adjust down to where the evap
freezes. Since most of these thermostats are alike in physical
shape, you could simply buy a Coleman replacement thermostat and
install it.
My 15k BTU high efficiency coleman runs in all but the hottest
weather on 15 amp service. Tight but do-able.
