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Old 05-08-2012, 10:38 PM   #1
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Heat exchanger

I have 1984 Pacearrow and it has a water leak behind hot water tank. I noticed two hoses going in one cold and hot, but theres two more lines going in at the bottom of the tank. I don't know where they go, any help would be great.
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Old 05-09-2012, 11:31 AM   #2
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Do the two lines actually go to the Tank, or do they "T" into the lines going into the tank just before the tank?

Standard water heater if I can ASCII draw it

T--x---VALVE--Hot
A |
N |
K--x-- Valve-Cold

The This is a 3 valve system, the two X-s and the flat line in the middle are valves.

In a single valve system it's done a bit different. The outlet of the water heater has a check valve and you eliminate the top two valves, the valve at the bottom is a "3-way" going to the verticle pipe.

That's the bypass pipe by the way.

(There is also a 2 valve system, See 3 valve description, Leave the valve in the middle)_
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Old 05-09-2012, 12:06 PM   #3
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A picture would seriously help in answering your question.
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Old 05-09-2012, 07:02 PM   #4
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Heat exchange

Looking at the back, there is one pipe going in lower middle, other one is in middle toward the top. There is also one pipe bottom left and one bottom right which go to the rear of the coach. I'll try crawling under again, thanks.

Quote:
Originally Posted by wa8yxm View Post
Do the two lines actually go to the Tank, or do they "T" into the lines going into the tank just before the tank?

Standard water heater if I can ASCII draw it

T--x---VALVE--Hot
A |
N |
K--x-- Valve-Cold

The This is a 3 valve system, the two X-s and the flat line in the middle are valves.

In a single valve system it's done a bit different. The outlet of the water heater has a check valve and you eliminate the top two valves, the valve at the bottom is a "3-way" going to the verticle pipe.
Looking at the back theres one pipe going in lower middle, other one is in middle toward the top. Theres also one pipe bottom left, one bottom right which go toward the rear of the coach. I'll trying crawling under again. Thanks

That's the bypass pipe by the way.

(There is also a 2 valve system, See 3 valve description, Leave the valve in the middle)_
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Old 05-10-2012, 04:36 PM   #5
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Are the top ones actually rubber hoses, or copper or plastic? The answer could determine what they do.
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Old 05-10-2012, 10:15 PM   #6
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shower

I just got this Pacearrow and who ever had it didn't look after it. I didn't get a chance to look at the water tank today but there is another leak at the shower which I can fix but there is a hot line and cold line going to the shower with a pin in each that you can pull up, would you have any clue as to what I'm talking about. Thanks
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Old 05-11-2012, 12:07 AM   #7
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Quote:
Originally Posted by Duckmangt View Post
I just got this Pacearrow and who ever had it didn't look after it. I didn't get a chance to look at the water tank today but there is another leak at the shower which I can fix but there is a hot line and cold line going to the shower with a pin in each that you can pull up, would you have any clue as to what I'm talking about. Thanks
Those could be the low point drains. My MH has a valve for the low point drian that sounds similar. I pull up on the pin and it allows the water to drain out for winterization.

Again pictures would help. If I get a chance I will try to get a picture of my valve this weekend.

Mike
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Old 05-11-2012, 06:06 AM   #8
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shower

They do tee after the pins, are they open when pulled? Gee thanks
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Old 05-11-2012, 06:26 AM   #9
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On water heater bet 2 lines are from the motor used to heat water while on the road
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Old 05-22-2012, 06:20 PM   #10
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Heater

I finally got time to chack out water heater more,
x Hot water 1/2in. with valve
x Cold 1/2in. with valve
+ + water lines- looks like heater hose, goes into floor and in the frame going to the rear. There is also a heater under the bed with heater hoses going into frame toward the front.
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Old 05-28-2012, 12:36 AM   #11
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On the back of the tank at bottom there's a steel tube going horizantal and at each end there's a rubber hose connected that goes into floor. At the back under the bed there's a heater with two heater hoses going into the floor. My question is could these at one time be connected to motor using a heat exchanger then going to rear heater. Confused
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