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10-25-2006, 12:24 PM
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#1
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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The literature on my (new to me) 1998 Dynasty with Cummins 325 engine alludes to an engine block heater. In the engine bay, there is a capped-off male 120V plug. When it is plugged into a 120V source, I can hear a sound like a coffee pot makes before it starts perking (sizzzzllllee). Afraid to let it stay energized until I can feel the results. I don't want to let the magic smoke out if I am doing something wrong. I know that the head gets warm when my water heater (AquaHot system) is operating and assume the so called "block heater" applies heat somewhere else?? Anyone familiar with these systems?
BTW, it was great finding this forum. I promise not to be the first one banned for asking multiple dumb and dumber questions. My limit is ten or fifteen per day. :-)
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10-25-2006, 12:24 PM
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#2
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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The literature on my (new to me) 1998 Dynasty with Cummins 325 engine alludes to an engine block heater. In the engine bay, there is a capped-off male 120V plug. When it is plugged into a 120V source, I can hear a sound like a coffee pot makes before it starts perking (sizzzzllllee). Afraid to let it stay energized until I can feel the results. I don't want to let the magic smoke out if I am doing something wrong. I know that the head gets warm when my water heater (AquaHot system) is operating and assume the so called "block heater" applies heat somewhere else?? Anyone familiar with these systems?
BTW, it was great finding this forum. I promise not to be the first one banned for asking multiple dumb and dumber questions. My limit is ten or fifteen per day. :-)
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10-25-2006, 02:57 PM
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#3
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Member
Monaco Owners Club Winnebago Owners Club Vintage RV Owners Club
Join Date: Mar 2005
Location: Here, There, Everywhere
Posts: 53
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Ron, don't feel bad about asking dumb questions. (no question, if you don't know the answer, is dumb) I'm too bashful to ask, so I have to lurk and hope someone like you asks and I read everyone's answers.
Thank you!!!
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10-25-2006, 05:24 PM
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#4
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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<grin> I think I'll just plug this in and see where the smoke comes out. Then I'll be able to answer instead of ask.
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10-26-2006, 03:15 AM
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#5
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Senior Member
Monaco Owners Club
Join Date: Jul 2005
Posts: 1,253
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Hi -
I was told the only dumb question is: "Would you please make a special point to audit my tax-return in detail?" So, you're not even close yet!
From what I understand about the operation, the block-heater helps to prewarm it on colder days for easier starting. Your AquaHot is doing the same thing, I presume. Now, what constitutes a 'colder day', I'm not exactly sure. I've heard temperatures of "anything under 40", as well as "if it's freezing", and even "if you'd feel more comfortable wearing a jacket" (that one helps me not at all - I get cold at 65 degrees!).
I believe the block-heater has an automatic cutout that would prevent it from overheating and cooking the engine. Wow, what a hibachi that would be.
Perhaps others with more cold-weather and diesel experience will chime in here too.....
Personally, I'm looking forward to living where this discussion would be a completely moot and theoretical point
Ron
__________________
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'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.
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10-26-2006, 04:17 AM
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#6
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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Yeah, I guess a good clue as to the the plug's function and usage would be that it is secured to the 120V receptacle by a plastic hanger. It just screams "PLUG ME IN"! Took me almost two years of ownership to notice the thing though. I have found the paperwork, schematics and documentation to be kinda "iffy". Had a fuel valve issue and broke out the one-lines. They were beautifully done and bound in a nice folder. Trouble is they were generic to "all Dyanstys" and more confusing than assisting. A good wire tracer, digital voltmeter and some luck has hopefully solved the problem. :-)
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12-03-2006, 04:20 PM
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#7
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Junior Member
Join Date: Nov 2006
Posts: 14
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On our 1994 Dynasty I have a block heater. It plugs into a 110 outlet back of the engine compartment. I am sure it does not run through the inverter. I live in northern Idaho, and before we leave after Xmas I will leave it plugged in when the temp goes below freezing. I have done this since new and it has not hurt anything. I plug it into an 110 outlet in the motorhome building. I am not sure about it running through the inverter, so I plug it to an outside source. Does anyone know if it runs through the inverter. Thank Larry
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12-04-2006, 01:56 AM
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#8
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Senior Member
Monaco Owners Club
Join Date: Jul 2005
Posts: 1,253
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Hi Larry –
I would suspect that your block heater does not go thru the inverter, it doesn't in my '06 Endeavor . Electrical heating-elements like that are notorious for being power-mongers. Same for the frig, most of ˜em aren't going thru the inverter.
Let's just say for argument's sake that the engine heater is rated at 1000-1500 watts at 120vac - or somewhere in the neighborhood of 8-13 amps, which isn't very much if you're using shore power. But those same 1000-1500 watts at 12vdc (from the inverter) means it's sucking down your batteries at the rate of 80-130 amps/hr. Now, I may be wrong on the actual draw of the heater, but you get the general idea.
If you need the heater for a ˜short while', I suppose you could run an extension from an inverter-powered circuit in the coach. Or what about firing up the generator and using it?
Thanks!
Ron
__________________
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'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.
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12-04-2006, 06:00 AM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jul 2001
Location: SD
Posts: 1,022
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I use the Aquahot engine heater feature. There is a switch for it on the Aquahot panel. Gets the engine water temp up to about 150 in a couple of hours.
__________________
2004 HR Imperial
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12-04-2006, 06:37 PM
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#10
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Junior Member
Join Date: Nov 2006
Posts: 14
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Ron I do run it with the generator until I get to warmer temps. I still run an extension cord from the gen to the block heater. I have an plug in that does not run through the inverter in the coach. It also puts a nice load on the generator. Thank again Larry
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12-05-2006, 03:18 AM
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#11
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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My aquahot system heats the head even if I do not turn on the engine-heat pump. I would prefer to save that energy but don't seem to have the option.
If I recall correctly (take into account that it's cold here and I have a room-temperature IQ) the engine block plug drew 7.5 amps (850 watts or so).
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12-06-2006, 02:33 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Jul 2005
Posts: 1,253
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Thanks RonNBama for the correction. I wasn't exactly sure what I remembered mine was drawing, so I fudged it a bit
I recently got one of those 'Kil-A-Watt' meters (available at CW and other stores) that give a darn-accurate readout of exactly what an appliance or item is drawing. Went all over the coach and measured anything I could find or unplug (but I forgot the Block Heater, oops!), and wrote its wattage on the item. Now I know just how close I can get to becoming a blackout condition ( well, ok, at least I know what CAUSED it ).
I also have the Progressive Industries EMS-50C which has a digital readout of usage on each leg of the supply, but have found it to be a bit off. Talked to the folks there, and they sent me a new set of sensor-coils but they didn't seem to do much to help. Otherwise, a great product.
Stay warm, y'all!!
__________________
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'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.
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12-06-2006, 06:43 AM
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#13
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Retired Senior Member
Join Date: Oct 2006
Posts: 1,093
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by ronboc:
I recently got one of those 'Kil-A-Watt' meters (available at CW and other stores) that give a darn-accurate readout of exactly what an appliance or item is drawing.
Stay warm, y'all!! </div></BLOCKQUOTE>
Yep, I bought a couple of those meters too. Handy gadgets and according to my Fluke, deady accurate on voltage at least.
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12-06-2006, 06:52 AM
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#14
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Ron, most block heaters are like a electric heat element for your electric water heater and will draw quite a few amps until what its heating warms up and a thermal switch cuts it off if it has one. As lone as there is no short to ground you should be ok useing that block heater.
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