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Dehumidifier On & Off Period Feature

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Brad

Jan 1, 1970
0
Hi,

Does anyone know if there is a dehumidifier, instead of using
a humidistat setting, allows you to set the time on and the time off?

Example: Set the dehumidifier to run for a half hour, then be off
for an hour. This cycle repeats over and over.

Thanks in advance, Brad

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P

PeterD

Jan 1, 1970
0
the De'Longhi CFO5M dehumidifier operators manual says

* Never stop the unit by unplugging the power supply cord.
* Be sure after 3~ 5 minutes to restart the unit again when the unit
is stopped or power supply is cut.

So? Do you understand *why* they make these cautions? If you are
going to be an engineer and design a system to turn it off/on then you
need to understand the parts you are working on...

1. Why do they say 'don't stop by unplugging'?

2. Why do they say 'wait 3-5 minutes to restart'?


And please everyone, I know why, I'm asking the OP if he knows.

Then implement the timer as was suggested.
 
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Don Kelly

Jan 1, 1970
0
----------------------------
PeterD said:
So? Do you understand *why* they make these cautions? If you are
going to be an engineer and design a system to turn it off/on then you
need to understand the parts you are working on...

1. Why do they say 'don't stop by unplugging'?

2. Why do they say 'wait 3-5 minutes to restart'?


And please everyone, I know why, I'm asking the OP if he knows.

Then implement the timer as was suggested.
----
It's funny- a dehumidifier is supposed to reduce humidity to or below a
preset value- cycling on and off on a cycle unrelated to the humidity
(particularly if the humidistat is bypassed) seems to be defeating the
purpose of having one in the first place. What is the reason for wanting to
put it on a fixed cycle?
The stopping and starting may be related to the same problem with
refrigerators with marginal compressor motors- something to do with back
pressure in the compressor at start(?).
 
P

PeterD

Jan 1, 1970
0
The stopping and starting may be related to the same problem with
refrigerators with marginal compressor motors- something to do with back
pressure in the compressor at start(?).

Yes, it does. Not necessarily marginal, but there is no head pressure
release valve so you have to wait for pressure to bleed off.

Having answered that, the reason they say "don't unplug to turn off'
is a safety item, as the unit will be on, and when next plugged in
that may cause a problem. (yes, remote problem, but companies have
been sued for much stupider things that consumers do.) So they have to
give you a useless warning.

And yes, IMHO, a timed cycling unit is not a good idea, but maybe the
OP has a good reason. Big maybe however. If the humidity is too low
then he wastes electricity. If it is too high, then he doesn't get dry
air. So why bother? Maybe he has a good reason, but it must be a
national secret, as he hasn't told us!
 
D

Don Kelly

Jan 1, 1970
0
----------------------------
Frank said:
I have one I have to manual turn off (or on), and have a electronic
humidity
meter,
I turn it on when it goes to about 70% and turn off at about 50% or when I
wake before I go to work, The day I brought it, it was about 80%
as soon as I turn it off it quickly jumps up.

I would prefer to have one that you could set and forget. but it seems
De'Longhi do not have them any more.





Yes, it does. Not necessarily marginal, but there is no head pressure
release valve so you have to wait for pressure to bleed off.

Having answered that, the reason they say "don't unplug to turn off'
is a safety item, as the unit will be on, and when next plugged in
that may cause a problem. (yes, remote problem, but companies have
been sued for much stupider things that consumers do.) So they have to
give you a useless warning.

And yes, IMHO, a timed cycling unit is not a good idea, but maybe the
OP has a good reason. Big maybe however. If the humidity is too low
then he wastes electricity. If it is too high, then he doesn't get dry
air. So why bother? Maybe he has a good reason, but it must be a
national secret, as he hasn't told us!

There are bathroom fan switches that incorporate a humidifier sensor-
However it might be necessary to have such a switch operate a relay to
energise the humidifier ans the humidifier start current may exceed the
switch rating.
It would take a little wiring but the whole thing could be in a box attached
to the humidifier
 
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