Smarty wrote:
Wiring the humidistat and thermostat in parallel should theoretically work,
but.............
most humdistats... -
(That is a Dehumidifier "DeHumidistat" for the Cooling Mode, "Not the Heating Mode Humidifier Humidistat.")
- ... are designed to *********close********* their contacts when the humidity falls below a specific set-point (so as to energize a
humidifier) and therefore, will *******do the opposite******* of what the
original poster intended******* if wired in parallel as recommended.
The room TH has two Modes - Heating & Cooling, in the cooling mode,
wired parallel, the circuit would stay closed until the Setpoints of
both sensible temp & % RH were met.
In the Heating mode the Humidistat contacts would work the opposite way
& close to bring the humidifier on when the RH got too low.
Because Heat & Cool are separate circuits', each separate circuit can be
"wired in parallel to do different or opposite things.
The Humidity controller in each separate circuit is engineered to
perform differently, in the Heating Mode the Humidistat contacts are
open until the low %RH setpoint is reached & then the contacts close
bringing on the humidifier. The "Cooling Mode Dehumidification
controller & circuitry" works the opposite.
If they are wired in series, as soon as one of the two setpoints' is
reached the control circuit to the contactor in the cooling AC mode
would open shutting it off before the other setpoint was reached. The
entire purpose is to keep the AC running until both comfort level
setpoints are reached. The setpoints of the individual RM TH & the
dehumidistat can be set at a point where the individual wants each one
for their desired comfort in either the Cooling or Heating Modes.
There should also be a differential settings on both setpoints so the
controller can eliminate short cycling, especially of the AC in the
Cooling Mode.
http://www.udarrell.com/air-conditio...tent-heat.html
- udarrell
What is actually needed is a humidistat which closes it contacts when the
humidity level *****rises***** above a specific set-point,. thereby
energizing the air conditioning when there is too much humidity.
Using a conventional humidistat as the prior reply indicates will ***NOT
WORK*** as claimed, and, in fact, will turn on the a/c and keep it on as the
air gets drier....... Smarty
Sorry Smarty, but that is NOT the way the two separate circuitry's of
separate Heating & Cooling Modes will be wired. (See Above.)
- udarrell
"udarrell" wrote in message
.net...
1D10T wrote:
I read that if you set the T-stat to 70º and the H-stat to what you
*perceive* to be a comfort level, the AC only runs to achieve the relative
humidity set on the H-stat. It went on to say that it helps to keep the
unit
from cycling as often as it normally would, thereby saving electricity and
still be comfortable. The THI here for a week has been 110 - 115, and it
just got me to wondering. As inexpensive as the H-stats are I thought it
would be worth a try - or at least the time it takes to do all this
typing.
:-)
Opinions appreciated!
TIA
- - - - - - - - - - - - - - - - - - -
Easy's gettin' harder everyday
The two controls are wired in parallel (Not in series) therefore, if
either the Temperature or the %Relative Humidity set points are Not met, the AC
contactor will stay energized & the AC unit will stay running. Especially
if the system is somewhat oversized, it is a good way to go. - udarrell
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