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 > Your search for posts made by 'Wayne Dohnal' found 202 matches.

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RE: Dometic 2652 12V Draw

Info for the one I had previously: 0.36 amp gas valve on 0.1 amp idle auto mode 0.05 amp idle gas only mode So that quarter amp figure is probably a pretty good overall average.
Wayne Dohnal 10/21/14 02:05pm Tech Issues
RE: Battery Voltage Monitor

I use a battery monitor. It provides a voltmeter and ammeter, which many add to their RV with basic low cost meters. What the monitor provides over and above volts and amps is tracking of the approximate number of amp hours that go into and out of the battery. When boondocking, it lets you know how much battery power you've used up. With this info you know whether it safe to continue the consumption rate of if you need to conserve. When charging from a generator it lets you know when it's time to shut the genny off. Somebody with experience can figure this out with the voltmeter/ammeter combo, it's just more work and less accurate. When plugged into shore power a voltmeter is probably all you really need.
Wayne Dohnal 10/18/14 09:22pm Tech Issues
RE: Hot water heater has lumps of clear slime!!

I had the same thing happen with my home water heater. Never did figure it out.
Wayne Dohnal 10/18/14 04:53pm Tech Issues
RE: Do I have 2 WFCO Converters?

The larger capacity WFCOs use two paralleled ATO fuses for reverse polarity protection. Looks like on this 35 amp model they were able to, and did, use a single fuse, using the same case and escutcheon from the higher power models.
Wayne Dohnal 10/18/14 12:43pm Tech Issues
RE: Wire converter to which side of battery switch?

Just a warning not sure if it applies to your converter Some actually many of the converters with a remote control aka pendant consume a small amount of power from the battery all the time they are connected to the battery. Just something to think aboutFWIW, my PD9160A with Charge Wizard draws between 3 mA and 7 mA. The rate appears to be determined by the CW's mode which in turn determines the duty cycle of the green LED. That puts the battery discharge between about 2.2 and 5 Ah per month. For comparison, my battery monitor pulls out 6.4 Ah per month, and the self discharge of a 2x GC battery using the common 5% per month rate is 11.25 Ah per month. Bottom line: The battery draw of the 9160A+CW is IMO a nit. One detail that PD did a very good job with.
Wayne Dohnal 10/17/14 06:41pm Tech Issues

Almost everything I know (including pictures) is in this thread: http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24492263/srt/pa/pging/1/page/1 What I can add is: (1) The fan is not thermistor controlled. It's controlled by output current sensing. Don't know if that's direct or indirect current sensing. (2) I suggest using a lower resistance than 47k for the boost trigger. 47k pulls the sense voltage barely to the trigger borderline, and might not trigger boost on some converters. (3) The reset circuit in the thread is for the level-triggered-reset daughterboards, which I suspect are older, while the newer boards use edge-triggered reset. The edge trigger circuit is to hook a 1k resistor in series with a 1000 pF capacitor. Hook the resistor end to the converter + output, and the capacitor end to pin 4 of the PIC microcontroller. Then hook the reset momentary switch/button from the resistor-to-capacitor connection to the converter's - output. Power cycling the converter also causes a reset. I thought the fans were variable speed, but it's been a while and my memory reliability is getting worse every day. I've run across only 2 versions of the daughterboard, could be more of course.
Wayne Dohnal 10/16/14 01:01pm Tech Issues
RE: Battery Voltage Monitor

Does anyone have an opinion or has used something like this to monitor the batteries? http://www.ebay.com/itm/DC-120V-10A-Voltage-Amp-Power-Ah-Hour-Charge-Discharge-Battery-Monitor-Indicator-/181142316463 OR http://www.ebay.co.uk/itm/DC-120V-500A-Volt-Amp-Combo-Meter-Battery-Charge-Discharge-Indicator-With-Shunt-/170901504188I bought one of these for a non-rv application. It needs setup information entered into it, which is ok, but I quickly found that the setup info is lost when the meter is powered down. Because of this I didn't use it, so can't comment on any of its other traits.
Wayne Dohnal 10/15/14 02:13pm Tech Issues
RE: A Hockey Puck 15/30Amp Adapter to Avoid

The safety ground lug should never carry any significant current unless there's a fault elsewhere. A "hot skin" condition only occurs if the neutral and ground are bonded in the RV in violation of the NEC or shorted together, AND the power source hot and neutral are reversed. Just the absence of the ground alone should not cause any problems, although it's certainly not advised to leave it that way in case a fault should occur. Not so, there is stray capacitance between the H, N and G conductors through out the RV. When the G is allowed to float it will attempt to find a stable level 1/2 way between H and N or some where < 55 VAC. But the extent of current behind this voltage is in the order of being < 5 milliAmps otherwise it would trip GFCIs if there was a GFCI supplying the RV. Also, quite separate from the presence of 120VAC H and a N circuit wiring, if you park an RV under HIGH VOLTAGE distribution wires (ie 6,000 VAC) and the RV IS NOT CONNECTED to Shore Power AND the RV has no conductive connection to EARTH, that RV frame will develop a hot skin. This type of hot skin is due to the RV being an isolated capacitator plate between the high voltage wire and EARTH. IMHO. What part of "significant current" didn't you understand?I thought Harvard's response was to "hot skin", not "significant current". He in fact said <5 milliamps, which I would not interpret as significant in this context.
Wayne Dohnal 10/15/14 11:05am Tech Issues
RE: Battery jumper cables and terminolgy of CCA

I thought that the electricity was carried on the outer surfaceNot applicable at all to DC, and not applicable to 60 Hz. AC until the conductor diameter approaches 3/4 inch.
Wayne Dohnal 10/13/14 01:44pm Tech Issues
RE: CRV & Element Valve Job

Just to clarify, I believe the OP means a valve adjustment. A "valve job" has the specific meaning of pulling the heads and working on or replacing the valves, valve guides, and seats.
Wayne Dohnal 10/12/14 03:54pm Dinghy Towing
RE: Will the toad get sandblasted?

IMO it depends on the vehicles and where you drive. The first time we pulled the Fit with the Sprinter the bottom 12" of the poor Fit sprouted a few hundred rock chips. Contributing factors: Car very low to the ground, short rear overhang on motorhome, drove on gravel roads. The gravel road part was somewhat bad luck as they were rebuilding the main road in Badlands N.P., and there were even a few gravel stretches on the Interstate. Since then we use a Protect-a-tow which does the job except for an occasional "leaker" rock at the outer edge of the net.
Wayne Dohnal 10/11/14 09:03pm Class C Motorhomes
RE: Leveling a Fridge while on the Road

I cannot find any leveling specs for Dometic fridges. Are they out there anywhere? All I can find is the "level enough to be comfortable" language which of course means different things to different people. I'm interested in the ARP device. Seems like a reasonable add-on considering the cost of the fridge. I'm a bit intimidated by the temp sensor installation, having to open up the metal case around the boiler. Have to think this one through more before proceeding.
Wayne Dohnal 10/09/14 04:28pm Tech Issues
RE: PD 9260 how long to charge?

I'm basing what I say on this statement in the Charge Wizard patent: "In Auto Boost the power converter will run for a maximum of eight hours unless the battery voltage rises above 14.0 volts in which case the power converter will run for four hours after the 14.0 volt level is detected. If the power converter runs eight hours without exceeding 14.0 volts, the power converter switches to the Normal Mode." If reality differs with this, I defer to reality, plus it looks like my statement about the converter not measuring the output voltage is (as Richard Nixon famously said) "inoperative".
Wayne Dohnal 10/08/14 03:18pm Tech Issues
RE: PD 9260 how long to charge?

AFAIK (not much) if the PD goes to 14.4 by itself at the start of the recharge, it will stay at that for the time it takes to get the batts to about 97% then drop to 13.6, even if that time is less than four hours, say three hours. Even if the PD converter measured output voltage and/or current (which it doesn't) to determine SOC, how would it know if its power was going into the battery or running DC loads in the RV? Without measuring voltage and current at the battery it is clueless as to the battery's SOC. It's all timer-based for a particular example battery of an assumed size, assumed SOC, and assumed temperature. If you're not running the generator for more than a few hours, and it's not obnoxiously hot, my algorithm is to run in boost mode whenever the generator is running.
Wayne Dohnal 10/08/14 10:44am Tech Issues
RE: DirecTv . . Switching from SD to HD

I believe "solid copper core" means that the center wire is copper, as opposed to copper plated steel used the the lower cost RG6. All RG6 is solid core. A stranded core would never work with the connectors.
Wayne Dohnal 10/07/14 01:02pm Technology Corner
RE: PD9200 Series "manual override" question.

With a user who has his battery metered and knows about battery charging basics, temperature effects, etc., he can do much better than PD's not all that sophisticated charge wizard sensing capability and algorithms for efficient charging. For somebody without any battery knowledge or real time electrical data, I agree with not using the button. I think a person with the battery knowledge and metering will realize this on his own. The PD converters often do have trouble maintaining their output at 14.4 volts, a totally different issue unrelated to manual vs. automatic operation.
Wayne Dohnal 10/06/14 08:26pm Tech Issues
RE: Keeping Tow Car Battery Charged while Towing!

On the Honda Fit with GPS (maybe all other Hondas with GPS?), when you turn the key to unlock the steering column, the GPS runs, cooling fan and all. The Fit in particular has a silly looking miniature battery. As much as I like Hondas I think their GPS power operation is all screwed up. EVERY time you start the car, you have to press the GPS's CYA button to use it. But the unit un-powers when cranking the engine, so if you program it before starting the engine, you have to do the CYA button and setting the GPS mode over again. Seems about as backwards as backwards can be.
Wayne Dohnal 10/04/14 10:52am Tech Issues
RE: Battery Life and Low Temps

I have a real life example from last week. Ran the eu2000i 3 days, about 2 hours total each day, pushing about 45 Ah into the battery, 15 minutes of microwave time and 10 minutes of electrically boiling a quart of water. Burned about a quarter gallon of gas each day. The "generator hours" encourage fast-as-possible charging. The battery would start out pulling 50 amps, but even in boost mode that tapered down after 20 minutes or so as the SOC went up.
Wayne Dohnal 10/04/14 12:49am Tech Issues
RE: Keeping Tow Car Battery Charged while Towing!

I hook ignition-switched power from the motorhome directly to the dinghy battery, fused on both ends. No diodes, and no problems after a few years of use.
Wayne Dohnal 10/04/14 12:33am Tech Issues
RE: Open Neutral and Fridge says A

The ground prong hole in a "neutral floating" generator is connected to the generator's metal frame (or chassis), which should connect it to all exposed metal parts. This will result in the frame of the RV being connected to the frame of the generator. I assume the purpose is so you can't get shocked if touching the rv frame and generator frame at the same time.
Wayne Dohnal 10/03/14 07:54pm Tech Issues
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