wavery
Model #: (005885-0)
Propane or Natural Gas: LP
Length of gas pipe feeding the generator: 50 ft
Size of gas pipe feeding the generator: 1"
How long since the last full maintenance: new generator
How long have you experienced this problem: just now

I have a new 17kw generator. I'm wondering weather the engine RPM is supposed to be the same at 1/2 load and full load. The manual states the generator will butn about 1.6 gph at 1/2 load and 2.5gph at full load. It is running now (windstorm near seattle). And it's running about 3100 rpm with little load on it. Am wondering if it is set up right. We have propane major appliances so don't run "heavy hitters" like hot water, furnace, and stove off it.
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Canada_Guy
By no means am I an expert here. I am just a homeowner with a 14 kw LP model, but I will offer an answer. The generator RPM is directly related to the output frequency. As such, it should be running at 3600 RPM (for 60 Hz operation) and should be pretty close to constant RPM from light to heavy load.

How are you measuring RPM? Do you have any way of measuring the frequency of the AC output?
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Skip Douglas SkipD
I second the question about how the RPM is being measured.

Was the gas regulator upgraded to a new size when the generator was installed? Chances are that should have been done.

For the specifications regarding voltage and frequency, read your manual - it's at the top left of page 16 (assuming you have manual #0H8358).
Skip Douglas
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wavery
generator RPM

I read the RPM off the graph of my wireless remote monitoring station. Regarding the LP regulator- I had the propane company come up and he said it had more than enough capacity to handle the addition of the generator. It's adjustable, and they just had to "dial it up"
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Skip Douglas SkipD
wavery;7681 wrote:
I read the RPM off the graph of my wireless remote monitoring station.
I suspect the monitoring station is in error. It would be a very good idea to get a decent tachometer such as the TECH-TACH TT-20K from [URL=http://www.tinytach.com/design/handheld.php][COLOR=blue][U]Design Technology, Inc.[/U][/COLOR][/url] or a digital multimeter such as a Fluke meter that reads "true RMS" values and can read the frequency of the power coming from the generator.

wavery;7681 wrote:
Regarding the LP regulator- I had the propane company come up and he said it had more than enough capacity to handle the addition of the generator. It's adjustable, and they just had to "dial it up"
Has the gas pressure been measured where it goes into the generator? If so, what was the value?
Skip Douglas
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ohmslaw
A simple volt meter will tell a lot. I would guess that you have a erroneous rpm reading or maybe the unit is in exercise mode. A volt meter indicating proper voltage from the unit would tell me the RPM is probably correct.
Tim
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wavery
Rpm

I have no reason to believe the opertating RPM is wrong, but I will check the frequency output. I just wanted to verify that the RPM is supposed to be the same at full load and 1/2 load. That way I know that I'm not burning propane faster than I should be.
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Zapme
A 2 pole generator has to run at 3600 rpm to produce 60Hz. Your unit will burn more fuel under a higher load at the SAME rpm because the governor will allow more fuel into the carburetor to maintain the 3600 rpm. If your unit is actually running at 3100 rpm.......ya better get it checked out BEFORE the warranty goes bye bye or before you damage some of your electronics inside the home.
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wavery
I will do that. I may have just been reading the monitor wrong. I guess the thing to do is check the frequency output.
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