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Re: New Heat Exchanging Water Heater - Installation Question [message #294162 is a reply to message #294161] |
Fri, 22 January 2016 09:06 |
JohnS
Messages: 126 Registered: December 2014 Location: Vacaville, CA
Karma: -2
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My 77 came with (and still has) engine pre-heat for the house water heater. One line, as you noted, is from a tee at the back of the block. The other is from a tee placed in the line which goes between the engine water pump and the cabin heater. That tee is very close to the curb side of the radiator housing. If your ball valve is between that tee and the cabin heater, you'll still get house water pre-heat.
Always liked having hot water when we stopped.
John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
78 Buskirk stretch, "What were we thinking?"
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Re: New Heat Exchanging Water Heater - Installation Question [message #294164 is a reply to message #294161] |
Fri, 22 January 2016 15:25 |
Dennis S
Messages: 3046 Registered: November 2005
Karma: 2
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Steve
You may be aware -- the discharge at the rear of the engine has a restriction washer in it -- flow is reduced to about a 1/4 inch.
Dennis
SteveW wrote on Fri, 22 January 2016 08:36Greetings !
I just purchased an Atwood GEH9-EXT Gas and Electric with Heat Exchanger XT 6 Gallon DSI Water Heater (90068).
http:// www.amazon.com/Atwood-GEH9-EXT-Electric-Exchanger-Gallon/dp/B00CLSUIU6/ref=sr_1_1?s=automotive&ie=UTF8&qid=1453472812&sr=1-1&keywords= Atwood+GEH9-EXT+Gas+and+Electric+with+Heat+Exchanger+XT+6+Gallon+DSI+Water+Heater+90068
It seems to be a pretty nice unit... it superheats the 6 gallons and then dispenses it through a thermostatically controlled mixing valve (mixes with cold stream) yielding 9 gallons of hot water.
I'm aware of the "T" fitting on the rear of the engine on the passenger side to get hot engine coolant... I'll run a line from there to the water heater.
But where should I plumb in the return ?? Another "T" in the heater hot water return line ??
I've also installed a ball valve to block flow to the firewall mounted heater / AC unit. When that valve is closed - will that also block flow to the water heater ?
I'd prefer not to reinvent something here... Could anyone please share a quick description of how the "factory" heat exchanging water heaters were plumbed ??
As always, THANK YOU ALL for the wealth of information shared here.
Steve W
1973 23'
Southern California
Dennis S
73 Painted Desert 230
Memphis TN Metro
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Re: New Heat Exchanging Water Heater - Installation Question [message #294187 is a reply to message #294161] |
Fri, 22 January 2016 21:16 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
Karma: 10
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Just find both hoses that go to the cabin heater. Put tees in both of them connect you hoses running to the house water to those tees.
You can install the cabin heater shutoff valve anywhere in either of the hoses running to cabin heater. I have mine mounted up front near the heater core itself. I like it there because I can open the right hood and easily turn the ball valve off or on.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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