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I have a large wood stove with back boiler to heat 4 rads in my bungalow but it wont seem to get the water hot enough to heat the rads. the rads are not cold but are far from hot. The fire burns fine, but not hot enough it seems, any ideas?

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Make sure that the water level is full and don't forget to bleed any air out of the systen.

Posted on Nov 30, 2008

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Honeywell technical support


This boiler, from memory, has an electric diverter valve.
If the system has dirty (sludge/scale laden) water then the diverter valve may not return under spring pressure, and therefore not divert all of the hot boiler water to the hot water heat exchanger, leaving some going to the rads.
If I am right then the rads will not get fully hot.
If the valve has failed completely, or electrically, then the rads will get fully hot and there will be no hot water output (hot water will be cold).

Aug 19, 2014 | Heating & Cooling

Tip

How to Hookup Your Outdoor Wood Boiler


You just bought or a thinking of buying an <span style="font-weight: bold;">outdoor wood boiler.</span> How do you integrate that boiler into your existing <span style="font-weight: bold;">home heating system</span>? The guy selling you the boiler wants the sale and tells you that hooking it into your system is very simple.<br /><br /><span style="font-weight: bold;">Outdoor wood boilers </span>come in many shapes and sizes. For the most part bigger is better for these things. The next thing you need to consider is whether the <span style="font-weight: bold;">boiler is an open or closed system</span>. It does make a difference in the way it gets hooked up. <span style="font-weight: bold;">Closed systems</span> can be hooked right up to your <span style="font-weight: bold;">existing boiler system </span>in a <span style="font-weight: bold;">primary secondary configuration</span>. This means that the wood boiler circulates to two tees in your home system and the home system circulates the water through the home. The two waters mix through the tees.<br /><br />If your wood boiler is an <span style="font-weight: bold;">open system</span> then you need to install a <span style="font-weight: bold;">stainless steel flat plate heat exchanger </span>to divide the two waters. The hookup of the <span style="font-weight: bold;">heat exchanger</span> is not that hard if you follow the instructions properly. This heat exchanger is very effect in<span style="font-weight: bold;"> transferring the heat</span> from the wood boiler to the inside heating system. It also keeps the water of the<span style="font-weight: bold;"> inside system pressurized and isolated.</span><br /><br />If you are installing your outdoor furnace to a <span style="font-weight: bold;">hot air heating system</span> then you need to <span style="font-weight: bold;">buy a coil</span> similar to your car radiator to install in the plenum on the supply side of your <span style="font-weight: bold;">existing hot air furnace</span>. To this coil you will <span style="font-weight: bold;">hookup the water pipes from the outdoor boiler</span>. The water running through the coil will heat it up so that the air going through from the <span style="font-weight: bold;">hot air furnace </span>will be warmed. The water hookup for this style of heat is very simple, but the <span style="font-weight: bold;">electrical hookup of the blower, pump, and circulator </span>may not be as simple. You may need someone with a good electrical knowledge to make everything happen in the right sequence.<br /><br /><span style="font-weight: bold;">Outdoor wood boilers can heat your home effectively </span>if they are <span style="font-weight: bold;">installed to your existing heating system properly</span>. If they are installed properly you will notice no difference in the heating of your home. It will be <span style="font-weight: bold;">warm and comfortable.</span> Make sue that you do your research properly before trying to <span style="font-weight: bold;">install your outdoor wood boiler.</span>

on Feb 21, 2011 | Heating & Cooling

Tip

Outdoor Wood Stove Hot Air or Hot Water


You're getting a new wood stove and you have many decisions to make. Other than brand, you need to decide whether you will use hot air or hot water to get the heat from the wood stove to the living space.

If you have a hot water heating system already installed then you obviously need to have a water stove. If you are thinking about what to install in a new home or already have hot air then you need to consider what will be the best option for you.

Now if you are installing a new system then you want to go hot water. That is by far the best way of heating and will be the best way to heat using an outdoor wood stove. Hot water heating is one of the best ways to get great heat transfer from the fire to the water to the air.

If you have hot air heat and want to heat with wood then you can install a wood hot air furnace, and set it beside your existing furnace. The ductwork will have to be reworked to get the heat from the wood furnace to the existing ductwork. Or you can install a coil into the ductwork on the supply side of the furnace, for the water to run through from a hot water wood burner. This is probably the best way to heat if you have a hot air furnace. Installing the hot water coil is a very simple process and the piping is fairly easy to hookup.

Hot air wood furnaces are almost always a inside the structure appliance, which means that you have the mess of the wood and the ashes inside. This dust and dirt mess is something that is much better kept outside where it can be cleaned up much easier.

Bottom line here is that you want to use a hot water wood burning stove if you can. You will be much happier with the heat that you get from burning wood.

on Dec 08, 2009 | Heating & Cooling

1 Answer

How do i get even heat thru out the house with a daka wood stove


http://www.hearth.com/talk/categories/main-hearth-forums.4/
You burn wood, and smoke goes up flueway.
You're not running chimney smoke through ductwork so you have a heat exchanger.
What kind of heat exchanger?
probably air since you're running through ductwork?
How much hot air or hot water is coming off heat exchanger?
How big of a space can be heated with that amount of heat?
Is the exchanger located in optimal location?

Considerations.
One room log cabin with fireplace will not stay very warm.
One room house with big wood burning stove in center, with hot flue pipe running across the room and exiting on far wall, will get warm-hot, but will cool off fast.
Why?
Because the BTU output of firewood is much less than electric, coal, oil, or gas.
Otherwise they would have made wood-burning steam locomotives. But the locomotive boiler cannot get hot enough with wood ... the boiler needs coal to produce enough BTUs to boil water fast enough to rotate the turbine and turn the wheels.

Maybe your wood stove output should be measured.
Don't forget a huge percentage of fire heat goes straight up flueway.

Mar 16, 2013 | Lux Tx500 Series Smart Temp Electronic...

1 Answer

New Vaillant 360 eco plus boiler, takes almost 3/4s an hour for rads to come up to a decent temp. Hot water is fine. Called out install Engineer who is an excellent tradesman but he says everything


We have just had our old system boiler replaced with a vaillant ecotec plus 837 and sounds like a similar working operation to ours. At first I was a little concerned,but I was told by our installer that he was told by vaillant that these very latest boilers size the system on start up for about 10 mins, then take temperature to target flow which you set boiler at. So even by setting target flow temperature very high you still get the initial sizing cycle, which ours was about 30-35c temp. These boilers seem to run biased for efficiency as after a while they modulate the boiler burner down and the radiators run more on the side of warm than really hot like the old type boilers. You also get better efficiency as at lower temperature the boiler condenses better. You will also find you get a more constant temperature in your home rather than over shoots. I was concerned at first, shame there was no info/explanation in user manual as people do need to know that this is normal operation. We are used to ours now, took a month and by the way these boilers can make a creaking noise but was told this normal expansion/ contraction but annoying when sited in bedroom cupboard. Best of luck!

Oct 27, 2012 | Water Heaters

Tip

How to Hookup Your Outdoor Wood Boiler to Your Existing Heating System


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Outdoor wood boilers come in many shapes and sizes. For the most part bigger is better for these things. The next thing you need to consider is whether the boiler is open or closed. It does make a difference in the way it gets hooked up. Closed systems can be hooked right up to your existing boiler system in a primary secondary configuration. This means that the wood boiler circulates to two tees in your home system and the home system circulates the water through the home. The two waters mix through the tees.

If your wood boiler is an open system then you need to install a stainless steel flat plate heat exchanger to divide the two waters. The hookup of the heat exchanger is not that hard if you follow the instructions properly. This heat exchanger is very effect in transferring the heat from the wood boiler to the inside heating system. It also keeps the water of the inside system pressurized and isolated.

If you are installing your outdoor furnace to a hot air heating system then you need to buy a coil similar to your car radiator to install in the plenum on the supply side of your existing hot air furnace. To this coil you will hookup the water pipes from the outdoor boiler. The water running through the coil will heat it up so that the air going through from the hot air furnace will be warmed. The water hookup for this style of heat is very simple, but the electrical hookup of the blower, pump, and circulator may not be as simple. You may need someone with a good electrical knowledge to make everything happen in the right sequence.

Outdoor wood boilers can heat your home effectively if they are installed to your existing heating system properly. If they are installed properly you will notice no difference in the heating of your home. It will be warm and comfortable. Make sue that you do your research properly before trying to install your outdoor wood boiler.

on Dec 03, 2009 | Heating & Cooling

3 Answers

MY VOKERA BOILER IS NOT WORKING I HAVE NO HOT WATER AND NO HEATING


try check in the water pressure on the boiler should be on 1.5 bar

Jun 01, 2010 | Heating & Cooling

1 Answer

I purchased an aqua star 1600h-lp to be installed in a cottage. Question is, the cottage is heated with a large wood stove/fireplace. The water heater is located in a bathroom at the other end of the...


I would say that the wood fire/stove must have a heck of a draw to affect the bathroom heater. Maybe a separate air supply from outside via a pipe,to the stove meshed off against vermin would decrease the problem. Plus it could stop cold air being sucked across the room from an outside door.
Downdraft through the heater could happen with either vertical or horizontal vent. More important is the direction of the prevailing wind [horizontal] ingress of water/snow etc [vertical]
We often use the separate air supply in the UK and if the pipe bore is large enough 4" plus it seems to work ok.

Mar 20, 2010 | Bosch & Tankless LP Hot Water Heater

1 Answer

Solid fuel stove linked to oilsystem with two zone


Put a temperature operated control (aquastat) on the piping of the wood stove so that if it is on, it will interupt the circuit wired to the oil burner at the X&X terminals of the boiler control.As the wood stove cools off, it will close the connection allowing the oil system to fire.

Mar 04, 2010 | Honeywell Electronic Programmable...

1 Answer

Wood burning stove with integral burner not heating the water eno


When is the last time you brushed out the burner tubes of the boiler? This is how heat transfers and if you have a coating of soot, it will prevent heat transfer. check this and post me back

Dec 01, 2008 | Water Heaters

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