Dehumidifier On & Off Period Feature

Brad · Oct 12, 2007

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

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

John Fields · Oct 12, 2007

On Fri, 12 Oct 2007 12:34:32 GMT, bpetria@verizon.net (Brad) wrote:

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.

---
Why not bypass the humidistat and switch the mains with a cycling
timer?

--
JF

Frank · Oct 12, 2007

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.

John Fields <jfields@austininstruments.com> wrote in message
news:t9sug319b61e0e7n47ghfrolm41pv46g2h@4ax.com...
On Fri, 12 Oct 2007 12:34:32 GMT, bpetria@verizon.net (Brad) wrote:

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.

---
Why not bypass the humidistat and switch the mains with a cycling
timer?

--
JF

PeterD · Oct 13, 2007

On Sat, 13 Oct 2007 09:49:37 +1300, "Frank" <erty@home.com> wrote:

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.

Don Kelly · Oct 13, 2007

----------------------------
"PeterD" <peter2@hipson.net> wrote in message
news:ja60h3152gvubfcc1rl993169fqllitkd4@4ax.com...

On Sat, 13 Oct 2007 09:49:37 +1300, "Frank" <erty@home.com> wrote:

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.
----

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(?).

--

Don Kelly dhky@shawcross.ca
remove the X to answer

Frank · Oct 13, 2007

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(?).

please top post so we dont have waste time scrolling down

Don Kelly <dhky@shaw.ca> wrote in message news:IbXPi.29203$Da.16388@pd7urf1no...
----------------------------
"PeterD" <peter2@hipson.net> wrote in message
news:ja60h3152gvubfcc1rl993169fqllitkd4@4ax.com...

On Sat, 13 Oct 2007 09:49:37 +1300, "Frank" <erty@home.com> wrote:

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.
----

--

Don Kelly dhky@shawcross.ca
remove the X to answer

John Fields · Oct 13, 2007

On Sat, 13 Oct 2007 17:24:26 +1300, "Frank" <erty@home.com> wrote:

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(?).

please top post so we dont have waste time scrolling down

---
This is USENET, not email, and top-posting is frowned upon because
it destroys the natural chronological flow of a thread.

Even Google recognizes that and from:

http://groups.google.com/support/bin/answer.py?answer=12348&topic=250

"Summarize what you're following up.

When you click "Reply" under "show options" to follow up an existing
article, Google Groups includes the full article in quotes, with the
cursor at the top of the article. Tempting though it is to just
start
typing your message, please STOP and do two things first.
Look at the quoted text and remove parts that are irrelevant.
Then, go to the BOTTOM of the article and start typing there.
Doing this makes it much easier for your readers to get through your
post. They'll have a reminder of the relevant text before your
comment, but won't have to re-read the entire article.
And if your reply appears on a site before the original article
does,
they'll get the gist of what you're talking about."

Besides, you bottom-posted your comment, which destroys your
atrociously constructed "argument".

--
JF

PeterD · Oct 13, 2007

On Sat, 13 Oct 2007 03:45:44 GMT, "Don Kelly" <dhky@shaw.ca> wrote:

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!

Frank · Oct 13, 2007

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.

PeterD <peter2@hipson.net> wrote in message
news:tam1h39u11i4524k7b93ipj6cjjockrr2c@4ax.com...
On Sat, 13 Oct 2007 03:45:44 GMT, "Don Kelly" <dhky@shaw.ca> wrote:

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!

Don Kelly · Oct 14, 2007

----------------------------
"Frank" <erty@home.com> wrote in message news:47112e0a$1@clear.net.nz...

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.

PeterD <peter2@hipson.net> wrote in message
news:tam1h39u11i4524k7b93ipj6cjjockrr2c@4ax.com...
On Sat, 13 Oct 2007 03:45:44 GMT, "Don Kelly" <dhky@shaw.ca> wrote:

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!

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

--

Don Kelly dhky@shawcross.ca
remove the X to answer

Frank · Oct 14, 2007

Sorry I missed your reply

Don Kelly <dhky@shaw.ca> wrote in message
news:gJdQi.35442$Da.18133@pd7urf1no...
----------------------------
"Frank" <erty@home.com> wrote in message news:47112e0a$1@clear.net.nz...

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.

PeterD <peter2@hipson.net> wrote in message
news:tam1h39u11i4524k7b93ipj6cjjockrr2c@4ax.com...
On Sat, 13 Oct 2007 03:45:44 GMT, "Don Kelly" <dhky@shaw.ca> wrote:

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!

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

--

Don Kelly dhky@shawcross.ca
remove the X to answer

Jim Boyd · Jan 27, 2008

Brad wrote:

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

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

My Sears Dehumidifier that I purchased a few months ago has a 3hr on/off

and 6hr on/off cycle but I have not tried it that way and not sure if it
uses humidistat or thermistor.

Dehumidifier On & Off Period Feature

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