Results 1 to 15 of 15
Thread: MYCOM's manual
-
28-06-2006, 10:13 PM #1
MYCOM's manual
I need a MYCOM's manual, because i have to select an oil for an ammonia system, and want to see what is the MYCOM'S recomendations.
-
28-06-2006, 10:27 PM #2
Re: MYCOM's manual
Have you tried contacting Mycom direct through their website -
http://www.mycomus.comBrian - Newton Abbot, Devon, UK
Retired March 2015
-
28-06-2006, 11:11 PM #3
Re: MYCOM's manual
Hi, ingherrera
Originally Posted by ingherrera
Best regards,
Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
-
29-06-2006, 07:22 AM #4
Re: MYCOM's manual
Ridiculous time schedule.
-
29-06-2006, 09:47 AM #5
Re: MYCOM's manual
Hi, NoNickName
Originally Posted by NoNickName
Best regards,
Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
-
29-06-2006, 09:50 AM #6
Re: MYCOM's manual
1000 hours check the oil
10000 hours major overhaul
In one year, a plant working 24/7 adds up 8700 hours.
I can't possibly tell any customer that the compressor he/she bought has to be rebuilt while warranty is still pending.
-
29-06-2006, 10:08 AM #7
Re: MYCOM's manual
Originally Posted by NoNickName
service intervals given here are common to all manufacturers
Most compressors that are worked hard run 5000 to 6000 hours a year
What this equates to is a top end inspsection every year (valves checked) these may be replaced or allowed to run another year dependant on wear and hours run. The next year the piston rings and valve plate will usually be changed and the third year the bearings will be replaced.
You can let them run until something smashes, but that is not preventative maintenance, anyone can change the oil and let it run
You may get 30000 hours out of a set of main bearings, but all you are doing is shortening the life of the compressor shaft, which is the most expensive part.
These are high tolerance high effeciency compressors, unlike the commercial semi compressors, which sacrifice the effeciency for longevity
A semi will run for years at high speed on the original bearings, but the energy consumed would be much much greater than any industrial compressor, the chaep compressor is the high tolerance high effeciency compressor that has to be maintained on a on going basis, the real enviromentally friendly option
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
-
29-06-2006, 10:33 AM #8
Re: MYCOM's manual
Originally Posted by Andy
Originally Posted by Andy
We've got scrolls from copeland running 8000 a year in CCUs.
Originally Posted by Andy
Originally Posted by Andy
Originally Posted by Andy
-
29-06-2006, 12:00 PM #9
Re: MYCOM's manual
Hi,
Originally Posted by NoNickName
Originally Posted by NoNickName
Originally Posted by NoNickName
Originally Posted by NoNickName
Originally Posted by NoNickName
Many years ago I have been told (by people from Stal-Astra Sweden) you can build only two types of refrigeration plants:
1. Cheap plant without maintenance usually with short life - expensive
2. Expensive plant with maintenance to assure long life - cheap
Hope other guys will come with comments too
Best regards,
Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
-
29-06-2006, 12:28 PM #10
Re: MYCOM's manual
Originally Posted by NoNickName
Mycom are now using a hitachi scroll with aluminum windings on Ammonia, we will see how this goes
Nonsense in a teapot
try replacing a 8WB Mycom in the time it takes to do an overhaul, well you probably could but it would take a crane to do so, bit of a nonsense really
You have hit the nail on the head, this short service interval is whay recips died out for a few years. The reason they are now popular is the screws have poor part load effeciencies
When you take into account the seasonal EER the recip wins hands down.
We sell a range of packaged chillers, but we also seel ammonia chillers with water cooled condensers and flooded chillers, for people who care how much electric they are using and what effect this has on the enviroment
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
-
29-06-2006, 12:56 PM #11
Re: MYCOM's manual
Originally Posted by Andy
Originally Posted by Andy
Overhauling (on-site or off-site) is a matter of days.
Originally Posted by Andy
Originally Posted by Andy
-
29-06-2006, 03:24 PM #12
Re: MYCOM's manual
Originally Posted by Andy
I have heard some of these stories used to sell screws. 100,000 hour bearing life, no valves to replace, more efficient, can ingest liquid with no harm, cheaper to install, etc, etc.
When screw compressors were being sold some time ago, the salesman all said variable Vi was better than fixed Vi.
Recip compressors were less efficient than screws. All sorts of sales tactics were being used.
I think the simple fact is; both compressor types have some benefits that can be utilized... if done properly.
Screws can operate at high pressure ratios more efficiently. They require smaller areas for the equivalent capacity (on big systems).
But, I have never heard a salesman tell the owner the screw compressor is a lot more inefficient than a recip compressor at part load when trying to sell a screw.
And... I have never heard a screw salesman say recip's already have variable Vi. They don't even need control systems for variable Vi.
Although I would like to see someone add a manifold to a recip for economizers.
I'm in agreement with Andy. A lot of arguments are used to sell one compressor over another type. I think the arguments are based on what the salesman is trying to sell. Sometimes these are vary one-sided.
Originally Posted by Andy
There's a place for both. Now people are starting to use VFD's on screws. That's a big benefit for part load improvements.
Originally Posted by NoNickName
Originally Posted by Josip
Number 1 is usually a system that is designed to be cheap on the first install price. Then the system is operated in a "run to failure" mode. No maintenance is done... just spend enough money to keep it running. This is not much different than HVAC systems.
Number 2 does cost more up for the initial install and continuing operation. These are usually systems where the people recognize the loss of cooling costs more in lost production time, than the cost of the maintenance.
Of course there are all sorts of arguments that can be made for this too. In general, I think Josip summed it up very nicely.
-
29-06-2006, 08:52 PM #13
Re: MYCOM's manual
thank you. In the PDF file, there is a PETRO CANADA oil, i have a tech data a it seems to work ulntil 15000 hr
-
29-06-2006, 09:22 PM #14
Re: MYCOM's manual
Hi,
Originally Posted by US Iceman
Best regards,
Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
-
04-01-2010, 05:05 AM #15
Re: MYCOM's manual
i want to use screw compressor instead of recip. i want to know -ve of screw compressors vs recip compressor OR benefits
Similar Threads
-
Daikin Manual
By ingherrera in forum Air ConditioningReplies: 9Last Post: 05-12-2005, 09:38 PM -
User Manual Scotsman Ice One AS/E
By JohnMac in forum Trouble ShootingReplies: 1Last Post: 09-07-2005, 11:17 AM -
HP Switches (Manual or Auto)
By Latte in forum Technical DiscussionsReplies: 9Last Post: 02-06-2005, 07:48 PM -
CDK RC2000 Manual
By grabber01 in forum Supermarket RefrigerationReplies: 5Last Post: 21-03-2004, 09:57 PM