 alkizmo
join:2007-06-25
Pierrefonds, QC
kudos:1 | reply to Frink
Re: Generator doesn't work with Direct Vent Hot Water Heater said by Frink:is there any way I could circumvent that neutral to ground requirement or build a junction to do that in between the gene and the heater?
Now I'll probably get grilled for this, but:
Find a 3-prong plug that you can "dispose" of, as in, you don't care.
Cut off the cable on that plug while leaving a good 3 to 6 inches of cable still on it.
Strip the green and white wires inside that cable, and join them together with a wire nut. (Cut off the "hot" prong and cap the "hot" wire). Then plug that into a free socket on your generator. That will make a "removable" neutral/ground bond.
Now if it's "safe", I don't know, I just know it's not the proper way to do it, but I'm guessing you're in an "emergency" situation. |
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 FrinkProfessorPremium
join:2000-07-13
Scotch Plains, NJ | Thanks everyone for your input. Greatly appreciated. |
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FrinkProfessorPremium
join:2000-07-13
Scotch Plains, NJ | reply to alkizmo
said by alkizmo:said by Frink:is there any way I could circumvent that neutral to ground requirement or build a junction to do that in between the gene and the heater?
Now I'll probably get grilled for this, but: Find a 3-prong plug that you can "dispose" of, as in, you don't care. Cut off the cable on that plug while leaving a good 3 to 6 inches of cable still on it. Strip the green and white wires inside that cable, and join them together with a wire nut. (Cut off the "hot" prong and cap the "hot" wire). Then plug that into a free socket on your generator. That will make a "removable" neutral/ground bond. Now if it's "safe", I don't know, I just know it's not the proper way to do it, but I'm guessing you're in an "emergency" situation. So, in theory of course, I would plug that modified plug in to one of the two 120v outlets on the front of the generator, then the second would go straight to the water heater, correct? ...and wouldn't connect anything else for the period of time the heater needs to run, then remove the modified plug once complete. Thanks. |
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alkizmo
join:2007-06-25
Pierrefonds, QC
kudos:1 | The modified plug would join the ground to the neutral. Your WH is looking for that bond so it can know it was properly grounded. |
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FrinkProfessorPremium
join:2000-07-13
Scotch Plains, NJ | said by alkizmo:The modified plug would join the ground to the neutral. Your WH is looking for that bond so it can know it was properly grounded.
Got it, so if I have two 120v 3 prong outlets on my generator, one gets the modified plug, and the second just goes to the WH? |
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alkizmo
join:2007-06-25
Pierrefonds, QC
kudos:1 | said by Frink:Got it, so if I have two 120v 3 prong outlets on my generator, one gets the modified plug, and the second just goes to the WH?
Yes exactly, you gotta sacrifice one outlet for the modified plug.
If you can wait, I would hold out until one of our pros come to comment in this thread. I'm not even sure if I would do this modification myself without having my generator's chassis grounded to the house's ground. |
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 tp0dyabbazooiePremium
join:2001-02-13
Carnegie, PA
kudos:4 | I`m an AO Smith warranty service agent, and I can honestly say I havent run into this situation yet.
The control needs a good ground to prove flame properly. If you bond the water heater to the ground rod, it may work. (ie-- run a #14 conductor from chassis ground on the heater to the ground rod)
I know generators can provide noisy power. I have seen noisy power/bad power kill a powervent control. Hope you dont let the smoke out..
good luck, stinky :P
-j
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if it aint broke, tweak it!!
currently on FiOS (kick aZZ!) |
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 nunyaWho is John Galt?Premium,MVM
join:2000-12-23
O Fallon, MO
kudos:8
 ·Charter
 ·surpasshosting
 ·voip.ms
| reply to alkizmo
said by alkizmo:said by Frink:is there any way I could circumvent that neutral to ground requirement or build a junction to do that in between the gene and the heater?
Now I'll probably get grilled for this, but: Find a 3-prong plug that you can "dispose" of, as in, you don't care. Cut off the cable on that plug while leaving a good 3 to 6 inches of cable still on it. Strip the green and white wires inside that cable, and join them together with a wire nut. (Cut off the "hot" prong and cap the "hot" wire). Then plug that into a free socket on your generator. That will make a "removable" neutral/ground bond. Now if it's "safe", I don't know, I just know it's not the proper way to do it, but I'm guessing you're in an "emergency" situation. Don't do this. It's dangerous. Emergency or not. An "emergency" situation never constitutes doing stupid things. Quite the opposite. Don't create a "life or death" emergency trying to alleviate a "loss of comfort" situation.
As explained, your WH is looking for neutral and ground to be bonded. Ordinarily, this would be in the main disconnect (main panel). In your case, it would need to be at the genset.
There are multiple things that could wrong using this cheat. Anything metallic connected to the WH could become energized by the generator in such a scenario. This includes the metallic case and any metallic piping (gas or water). This could electrocute anyone touching them.
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If someone refers to herself / himself as a "guru", they probably aren't. |
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 jack bGone FishingPremium,MVM
join:2000-09-08
Cape Cod
kudos:1 | Scenario gives a whole new meaning to "hot water heater"... |
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| I have the same problem and AO smith told me today too bad! They stated that their units are not intended to wOrk with generators. I see lots of opinions on this post but not a clear safe answer? |
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sk1939Premium
join:2010-10-23
Washington, DC
kudos:9 Reviews:
 ·T-Mobile US
| said by Kurtis :I have the same problem and AO smith told me today too bad! They stated that their units are not intended to wOrk with generators. I see lots of opinions on this post but not a clear safe answer?
Get a transfer panel and a decent generator. |
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 DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2
 ·Bell Sympatico
| reply to nunya
said by nunya: An "emergency" situation never constitutes doing stupid things. Quite the opposite. Don't create a "life or death" emergency trying to alleviate a "loss of comfort" situation.
Amen. Amazing how people want their comforts like hot water and A/C in the midst of a power outage. I can see wanting to run a fridge or freezer and a water pump on a well and maybe a stove, but a hot water heater? 
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Need-based health care not greed-based health care. |
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 Jack_in_VAPremium
join:2007-11-26
Mathews, VA
kudos:1
1 edit | said by DKS:said by nunya: An "emergency" situation never constitutes doing stupid things. Quite the opposite. Don't create a "life or death" emergency trying to alleviate a "loss of comfort" situation.
Amen. Amazing how people want their comforts like hot water and A/C in the midst of a power outage. I can see wanting to run a fridge or freezer and a water pump on a well and maybe a stove, but a hot water heater? I use my generator to heat my water for showers. What's wrong with that? I just turn off everything else and turn the breaker on for the water heater and let it heat. It only takes about an hour. The hot water is enough for 2 showers and hot water for hand washing etc through the day.
So why do you have a problem with that? There is nothing "amazing" about it. Why take cold showers when you don't have to? |
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DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2 Reviews:
·Bell Sympatico
| said by Jack_in_VA:said by DKS:said by nunya: An "emergency" situation never constitutes doing stupid things. Quite the opposite. Don't create a "life or death" emergency trying to alleviate a "loss of comfort" situation.
Amen. Amazing how people want their comforts like hot water and A/C in the midst of a power outage. I can see wanting to run a fridge or freezer and a water pump on a well and maybe a stove, but a hot water heater? I use my generator to heat my water for showers. So why do you have a problem with that? There is nothing "amazing" about it. Why take cold showers when you don't have to? Do you need a shower in the first place? Having been through many power outages over the years, some lasting days, I have discovered that a sponge bath is just fine. And soap, water and a wash cloth at any temp works just as well as anything warmer.
I would suggest that if this attitude is typical, people are going soft. Very soft. 
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Need-based health care not greed-based health care. |
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 chambercPremium
join:2008-08-05
Irving, TX
·Time Warner Cable
| reply to alkizmo
said by alkizmo:said by Frink:is there any way I could circumvent that neutral to ground requirement or build a junction to do that in between the gene and the heater?
Now I'll probably get grilled for this, but: Find a 3-prong plug that you can "dispose" of, as in, you don't care. Cut off the cable on that plug while leaving a good 3 to 6 inches of cable still on it. Strip the green and white wires inside that cable, and join them together with a wire nut. (Cut off the "hot" prong and cap the "hot" wire). Then plug that into a free socket on your generator. That will make a "removable" neutral/ground bond. Now if it's "safe", I don't know, I just know it's not the proper way to do it, but I'm guessing you're in an "emergency" situation. It'll work... not the best solution, but "safe enough" for temporary use. |
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| reply to DKS
Some people need the generator for not only a water heater but a water well pump too.
Cold shower when it's below freezing outside and 40 degrees inside is a good way to become sick at a time you may not be able to get medical attention.
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CompTIA Network+ Certified |
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garys_2kPremium
join:2004-05-07
Farmington, MI Reviews:
·callwithus
·Callcentric
| reply to DKS
said by DKS:Do you need a shower in the first place? Having been through many power outages over the years, some lasting days, I have discovered that a sponge bath is just fine. And soap, water and a wash cloth at any temp works just as well as anything warmer.
I would suggest that if this attitude is typical, people are going soft. Very soft.
Yeah, and I don't like to go camping, either; I like my modern conveniences. Tell you what: We'll all buy whatever capacity generators we want, to power whatever appliances we want (for me central air is good to have) and we'll leave the discussion about the technical details. Is that OK with you? |
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FrinkProfessorPremium
join:2000-07-13
Scotch Plains, NJ | Everyone's advice is totally appreciated, and I understand the risks completely. That being said, bathing my 2 & 3 year old this morning in water that would not make them scream made all of us a lot happier... |
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DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2 Reviews:
·Bell Sympatico
| reply to TheTechGuru
said by TheTechGuru:Some people need the generator for not only a water heater but a water well pump too. Yes, I know. I would include a well pump as "necessary".
Cold shower when it's below freezing outside and 40 degrees inside is a good way to become sick at a time you may not be able to get medical attention.
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Need-based health care not greed-based health care. |
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DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2 Reviews:
·Bell Sympatico
| reply to garys_2k
said by garys_2k:said by DKS:Do you need a shower in the first place? Having been through many power outages over the years, some lasting days, I have discovered that a sponge bath is just fine. And soap, water and a wash cloth at any temp works just as well as anything warmer.
I would suggest that if this attitude is typical, people are going soft. Very soft.
Yeah, and I don't like to go camping, either; I like my modern conveniences. Tell you what: We'll all buy whatever capacity generators we want, to power whatever appliances we want (for me central air is good to have) and we'll leave the discussion about the technical details. Is that OK with you? Capacity is part of the "technical details". There is always a limit to capacity.
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Need-based health care not greed-based health care. |
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