ICM203 on break for boat HVAC unit - Page 3 - SailNet Community
 3Likes
Reply
 
LinkBack Thread Tools
post #21 of 26 Old 02-03-2019
Senior Member
 
SchockT's Avatar
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 2,189
Thanks: 3
Thanked 53 Times in 50 Posts
Rep Power: 8
 
Re: ICM203 on break for boat HVAC unit

Quote:
Originally Posted by SanDiegoChip View Post
I have been reading up on these but still am a little lost. Have not seen one with a timmer.





This is where the compressor is wired in the electrical box. So if we could add a timer here then set it at one min as it is being delayed by five min already then that would work?







Thanks,

Chip
Use your meter to check, but L1 (com) is probably powered continuously, and L2 is energized on a call for compressor run.

What's going on with the relay on the corner of the board? From the picture it appears that the plastic housing is melted and distorted, but maybe that's just the pic?

Sent from my SM-G960W using Tapatalk

2011 Jeanneau 39i Azura
SchockT is online now  
Sponsored Links
Advertisement
 
post #22 of 26 Old 02-03-2019
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 2,741
Thanks: 2
Thanked 206 Times in 203 Posts
Rep Power: 10
 
Re: ICM203 on break for boat HVAC unit

seems like the unit is cycling on and off to often. to big a unit for the load.? thermostat location to close to the air outlet? after it cools the boat why is the thermostat telling it to come back on so soon. this can happen when the thermostat is getting hit with the cold air coming out of the duct. put a pillow or blanket/towel over the thermostat and try the system
PhilCarlson likes this.

"FULL TILT II" 2011 BENETEAU FIRST 30
"GOLD RUSH" PRINDLE 16

Last edited by overbored; 02-03-2019 at 04:36 PM.
overbored is online now  
post #23 of 26 Old 02-03-2019
Senior Member
 
SchockT's Avatar
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 2,189
Thanks: 3
Thanked 53 Times in 50 Posts
Rep Power: 8
 
Re: ICM203 on break for boat HVAC unit

Quote:
Originally Posted by overbored View Post
seems like the unit is cycling on and off to often. to big a unit for the load.? thermostat location to close to the air outlet? after it cools the boat why is the thermostat telling it to come back on so soon. this can happen when the thermostat is getting hit with the cold air coming out of the duct. put a pillow or blanket/towel over the thermostat and try the system
Yes, that is a good point, under normal conditions I would expect longer off cycle times, although if it is really hot out it could just be solar gain. Boats are not known to be well insulated.

If the controller had adjustable deadband on the setpoint, the off cycle time could be increased that way, unfortunately I dont see a configuration option for that in the manual. It is 20 year old technology...

Sent from my SM-G960W using Tapatalk

2011 Jeanneau 39i Azura
SchockT is online now  
 
post #24 of 26 Old 02-03-2019
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 2,741
Thanks: 2
Thanked 206 Times in 203 Posts
Rep Power: 10
 
Re: ICM203 on break for boat HVAC unit

that is why I said to insulate the thermostat it acts like a dead band controller if nothing it should change the on off cycle times and you could learn from how that effects the system. slows down the reaction time of the thermostat. if it is mounted on a outside wall like the hull then this can also make it react to fast as you say solar gain. if the system works on other boats then the problem is in the particular install. so change something about the install and see what happens. block off part of the cold out and that will change the way the unit handles the heat load. if it runs all the time then you know the unit is to big for the given load. which is my guess it is winter in PV and not as much load as summer

"FULL TILT II" 2011 BENETEAU FIRST 30
"GOLD RUSH" PRINDLE 16
overbored is online now  
post #25 of 26 Old 02-03-2019
Senior Member
 
SchockT's Avatar
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 2,189
Thanks: 3
Thanked 53 Times in 50 Posts
Rep Power: 8
 
Re: ICM203 on break for boat HVAC unit

Place a good electronic thermometer right next to the temp sensor on the control panel and watch the temperature as the system runs. If it drops rapidly then it is probably being exposed directly to discharge air, which could be as cold as 55 deg F. If that is happening then you need to divert that discharge air so it doesnt influence the sensor. Monitor the system and time how long each on and off cycle is, and how many times it cycles in an hour.

With that controller you also have the ability to add an optional remote sensor, which you can put in the return air duct. That way it should smooth out the operation and reduce the amount of cycling.

Sent from my SM-G960W using Tapatalk
PhilCarlson likes this.

2011 Jeanneau 39i Azura
SchockT is online now  
post #26 of 26 Old 02-11-2019 Thread Starter
Senior Member
 
SanDiegoChip's Avatar
 
Join Date: Jun 2007
Location: Puerto Vallarta Mexico
Posts: 443
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 13
 
Re: ICM203 on break for boat HVAC unit

Hi,
Ok, so good news!
Now, we have talked to the EasyStart™ 364 support several times during installation and they had told us at one point this EasyStart™ 364 would not fix our problem.
First we decided to test out the EasyStart™ 364 with our Mermaid Marine Air 12000 btu unit we have been having the cycling problems with. Now we have fired it up before to make sure the unit worked properly with the EasyStart™ 364 but that is far as we went then.
This time we started the unit and let it run until it reached (cooling) temperature. Then we waited for 4 min and manipulated the temperature (opened hatches and companionway doors etc ) so theA/C would cycle back on.
And then the unit came back on. It turned on the March water pump for cooling and the fan went on. The EasyStart™ 364 has a 5 min timer built in so the compressor did not come on for another minute so that worked fine. Then when the compressor came on we expected the breaker to blow because it was under six minutes. But wait, here is the good news, the breaker did NOT blow!
So we did this test several more times and our problem has gone away!
Somehow the EasyStart™ 364 did solve this problem.
We haven't done the Honda EU2000i generator test yet. When we do we will post the results.
To answer a couple of questions.
We have a 20 amp breaker, recommended size by Mermaid Marine Air.
We had tried wiring the March sea water pump to a 110 plug and plugging it into an outlet and running it separately from the Mermaid Marine Air start-up but it made no difference.
Anyway, it is working great now so the world is a better place and THANK YOU to everyone for your support.
Chip
Blog - s\v Elegant'sea
SanDiegoChip is offline  
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Delay-on-Make or Delay-on-Break for HVAC? SanDiegoChip Electrical Systems 4 06-14-2018 07:31 AM
HVAC Garden Hose flush WindyT Gear & Maintenance 5 12-28-2017 07:30 PM
Did I break boat buying etiquette? gigamanx General Discussion (sailing related) 30 06-09-2016 10:55 AM
How does a boat break free of its moorings?… michael.anda C25 and 250 13 03-02-2016 05:51 PM
How to size HVAC Stillraining Gear & Maintenance 5 03-17-2010 01:47 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome