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Thread: Gram GSV185 Vi control priciple
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18-09-2008, 02:21 AM #1
Gram GSV185 Vi control priciple
Hi all,
Please advise me, I am changing Gram controller for GSV185 to PLC S7 because I cannot find spare part.
This compressor model has 2 solenoid valves for capacity adjust and 2 for volume ratio adjust.
Problem is I can calculate Vi setpoint but I do not khow what I have to think about if I want to increase or decrease Vi solenoid valve. For example, do I have to wait until temperature setpoint reach then adjust Vi?
Thank you,
Keerati
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18-09-2008, 10:46 AM #2
Re: Gram GSV185 Vi control priciple
Hi Keerati,
What you can not find the spare part?
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18-09-2008, 10:56 AM #3
Re: Gram GSV185 Vi control priciple
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.
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18-09-2008, 11:33 AM #4
Re: Gram GSV185 Vi control priciple
Hi Josip,
I cannot find new controller, I am already changed controller to PLC.
But I am not sure about Vi control concept.
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18-09-2008, 11:50 AM #5
Re: Gram GSV185 Vi control priciple
You can use cheaper Grammatic 1502
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18-09-2008, 03:30 PM #6
Re: Gram GSV185 Vi control priciple
Hi Keerati, contact me at the e-mail
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18-09-2008, 05:13 PM #7
Re: Gram GSV185 Vi control priciple
Hi, keerati
...hm... not sure but will try to find something to help you .... cannot understand why you did not ask immediately after damage of your controller ..... btw is that one Grammatic 1502 or 2502 .... or something else....
we had broken one G1502 and replace it with UNISAB II client is more then satisfied...
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.
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20-09-2008, 03:54 AM #8
Re: Gram GSV185 Vi control priciple
Hi Josef,
What's the email address please??
Best regards,
Keerati
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20-09-2008, 03:59 AM #9
Re: Gram GSV185 Vi control priciple
Hi Josip,
Many thanks for suggestion.
That's 1502. I am not the one who decide to use PLC control. My customer select this way because they cannot find spare part in Thailand. I am control engineer who make PLC program for them.
Best regards,
Keerati
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20-09-2008, 06:05 AM #10
Re: Gram GSV185 Vi control priciple
If you have to ask this question, your employer should question your ability to solve his problem! There are many places that you could find information on the fundementals of VI control, Try the OEM manual for the compressor. Not a flame, just an observation!
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22-09-2008, 05:01 AM #11
Re: Gram GSV185 Vi control priciple
Thank for observation ,even you have no sufficient knowledge.
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27-09-2008, 01:11 PM #12
Re: Gram GSV185 Vi control priciple
Hi, keerati
this above is not nice
.....unfortunately I do not know the exact algorithm used in 1502 controller.. for Gram185
please check attachments
....as you can see Vi depends on pressure ratio .. i.e. when you change capacity then you change Vi...
.... of course when Vi is automatic ... otherwise we change it 2 times per year ... summer and winter..
hope that will help a little..
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.
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17-01-2011, 12:55 PM #13
Re: Gram GSV185 Vi control priciple
Hi, I'm looking for the Digital Input Module used on standart compressor control packages for 240 VAC
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17-01-2011, 12:56 PM #14
It made by CRYDOM Mexico, yellow modules . Help me please
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