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Author Topic: Central Boiler E Classic 1400 Water Temp Issues  (Read 420 times)

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Offline tmills1288

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Central Boiler E Classic 1400 Water Temp Issues
« on: February 04, 2019, 02:11:08 PM »
I'm hoping someone can help me figure out my issue. I know I have creosote build up in my air tubes, but I'm still able to fuel a good fire and get my water temp up to 185, but when I tested my waterline where it comes into my house, right before it goes to my hot water heater, it is 35 to 45 degrees colder than what my E Classic shows. Then I tested it at the pump right after it comes out of the OWB, and it's already 30 to 40 degrees colder there as well. I thought maybe my reading on my OWB was wrong, but it seems to be right when I tested it. Does anyone know why I'm not getting the same water temp coming out of my E classic 1400 as what's in my water jacket? Thanks

Offline E Yoder

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #1 on: February 05, 2019, 07:10:54 AM »
Sounds like low flow causing inadequate mixing in the water jacket maybe? Or a bad temp probe on the control.
HeatMaster dealer support in VA.
GS100.

Offline tmills1288

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #2 on: February 05, 2019, 02:55:46 PM »
What would be causing the low flow? It is a 140' run to my house, that's one way, with 1" pex. Do you know what the proper pump for this application would be? I can check what I have for a pump when I get home. Thank you

Offline E Yoder

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #3 on: February 06, 2019, 07:12:23 AM »
There are many pumps out there. Post your model number.
Impeller might be broke.
How are you measuring temp? Surface of the pipe will read a bit low. Shiny surfaces don't read accurately with those laser temp guns.
HeatMaster dealer support in VA.
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Offline Roger2561

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #4 on: February 06, 2019, 11:31:47 AM »
I used to heat my home and DHW with an E-Classic 1400 until I replaced it last fall with the CB Titanium Edge 550 HD.  I only swapped it out to make it easier for me to clean things.  My old bones don't allow me to work like a pretzel anymore.  I never had issues with the water temp when leaving the OWB.  It ran flawlessly for 7 winters.  The only problem I ever had was with the air channels coming apart at the welds.  As soon as I find someone who does site welding I'll be getting them repaired and then I'm giving it to my nephew.  How old is your E-Classic 1400?  To expand on what Yoder said, if measuring at he pex pipe, you may get an inaccurate reading there too, it may read low.  Roger      
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Offline tmills1288

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #5 on: February 06, 2019, 01:20:21 PM »
I did use a laser temp gun and I figured it might be a little off, but 40 degrees seems like a lot to be off. My E Classic 1400 was purchased in 2010, but this is my first year with it, because we just bought the house last May. 

My pump is a Grundfos, Type: UP 15-42 F, 115V, 1PH, 60 HZ, 10 UF, P/N: 59896155 P1, PC 0943, Class F

Offline boilerman101

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #6 on: February 07, 2019, 12:01:01 AM »
Are you sure you have your hot and return lines connected to the correct ports on the Eclassic and the pump flowing the correct direction? CB pulls water from the top of the tank and returns lower in the tank. If backwards or not connected right, there could be a high temp difference with what is being read by the water temperature sensor that is also located high in the tank. Can you post a picture of your lines and pump hook up in back of the furnace?

Offline E Yoder

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #7 on: February 07, 2019, 05:34:16 AM »
In addition to the good points made above^^^
A 15-42 is a bit on the small side for a 140' run. I've done it and it may heat fine, but the flow through the furnace is on the low side. Others could comment better than I at what flow rate it would begin to stratify tho.
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Offline overclocking

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Re: Central Boiler E Classic 1400 Water Temp Issues
« Reply #8 on: February 19, 2019, 08:22:58 PM »
I did use a laser temp gun and I figured it might be a little off, but 40 degrees seems like a lot to be off. My E Classic 1400 was purchased in 2010, but this is my first year with it, because we just bought the house last May.

My pump is a Grundfos, Type: UP 15-42 F, 115V, 1PH, 60 HZ, 10 UF, P/N: 59896155 P1, PC 0943, Class F
A couple things.
1. Your exceeding over 15ft of head going 300ft, plus fittings and the exchanger. That pumps too small.
2. If your running 1 inch pex the max btu your going to get at nominal flow is 75k btu. The only way to overcome this is to increase Delta T by increasing the water flow.
3. Your air channels being clogged will not allow proper gasification. I made a post on how to remove the channels if your good at fabricating.
4. Drain some of the water and test it with a thermometer, the temp probes on the CB do go bad sometimes.
You need either 2 runs of pex to get the max output BTU, or you can try a bigger pump.
Either way I recommend a BG NRF 36 pump to increase the flow to where its achieving proper exchange.
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