Hot answers tagged

14

Wiring Diagrams Locate the schematic In most cases, a wiring diagram can be located inside the HVAC unit. Typically, it will be on the inside of the access cover. Find the transformer on the schematic Once you've located the diagram, you'll want to look for this symbol. Or the actual text that says "Transformer", which may be labeling a crudely drawn ...


11

Gas leak A gas leak could be deadly not only due to inhalation, but also as an explosion hazard. Carbon Monoxide Carbon monoxide is an silent killer. It's colorless, odorless, tasteless, and can kill you before you know you're dead. Combustion Air If the home is sealed tightly, and a source of makeup air is not present (for example if the source is ...


9

Bleeding radiators is quite simple, and can usually be done by homeowners. All that's required is a radiator key, a towel and/or bowl, and a bit of time. Why Bleed Radiators Even with closed systems, air can still find its way into the system. When it does, it will collect at the highest points available (the top of radiators). Trapped air can cause ...


8

Try this on for size: Annual Oil Bill * Efficiency = Cost of Oil actually used for heating. (The rest is waste). So on an annual bill of $1000, you are currently paying $650 for heat, and $350 out the chimney. (i.e. $650 is as low as you can go with a 100% furnace) So, if you were to replace that with an 87.2% furnace, your annual cost would be $650/87.1% ...


7

does the spin on that impeller (at a high velocity) really create enough momentum to move water up seven or eight stories? It doesn't have to create momentum as it isn't throwing water ballistically. It just has to create a small difference in pressure. Note that you ask about circulating water, not pumping it up into a tank. The pump does not have to ...


6

Yes this is common in the UK. The boiler will feed hot water into the heating coils in the tank as well as providing the hot water for the radiators. The electric (or immersion) heater will be there either as back up (in case the boiler fails) or to heat the water on cheaper electricity (Economy 7) overnight. There'll be a thermostat on the tank which ...


5

Fuel Sources Coal Wood Propane Natural Gas Oil Electricity Biomass Pellets Sun Earth Nuclear Fission Heat Transferers Gas Liquid Heating Systems Furnace Boiler Heat pump Electric heater Wood stove Fire place pellet stove Tauntaun


5

Electric water heaters lose very little heat. Putting a blanket on them or putting them on a timer won't save much money. NG/propane/oil water heaters, on the other hand, lose significantly more heat, as they not only lose heat through their outside surfaces, but also even more heat via the flue. Putting a blanket around the outside will prevent perhaps ...


5

I know it's in the comments, but I feel it's important enough to place in an answer: Never EVER throw water on a fire that is , or might be, oil or gasoline - based! If your furnace does not have an automatic thermal cutoff valve on the fuel line inlet, you're out of code (at least in Massachusetts), and should definitely have a plumber install one. Keep ...


5

Sadly, the answer is "no". Hot water, both in the boiler and in the radiators, is very corrosive IF there is oxygen in it. Water from your well or town has dissolved air, including oxygen (it's why fish survive in water). Once the water is in the system, the oxygen combines with the boiler/radiator linings, corroding it. There isn't a lot of oxygen in any ...


4

If you get good ignition and the boiler's ignitor stays on the entire time even after you have flame, then your flame sensor or controller is probably broken. Otherwise, you have a mixing issue. Either not enough air is being moved by the fan or oil is not flowing sufficiently, possibly because of issues with the nozzle. The 3 times lockout is a safety ...


4

You have probably fixed the problem - at least temporarily. The boiler requires that this condensation pipe is clear and unobstructed and removing the ice from the end has cleared the blockage. However, it's likely that the pipe will freeze up again - especially in this cold weather. The solution is simple - insulate the pipe. Either use something like ...


4

If you're in the UK, "boiler" usually implies what would be called "furnace" in the US, and tends to imply a gas appliance bristling with safety cutoffs. Assuming so... Have it serviced by a competent tradesman (CORGI registered) and don't worry about fire or explosion - it is a water heater not a "boiler" in the high pressure steam sense. HOWEVER make ...


4

We ended up bleeding the radiators, upping the pressure, and replacing the thermocouple. After all of that, we discovered that flames had been shooting out of the front of the boiler and melted half of the valve, messing up the electronics for the pilot light. We ended up replacing the entire boiler since it was 35 years old anyway, but the reason for the ...


4

Unless you have a written local amendment disallowing it there is no reason this would be unsafe or prohibited. I have seen and worked on many, many basements that fit this exact description. My only concern would be keeping the area clear of lint from the dryer.


4

Your diagnostics so far point to the indirect hot water heater coil leaking potable water into the furnace loop as the most likely issue. You could perhaps verify if you can shut your hot water down for a few days (not convenient, I know.) Depending on the overall condition of the indirect water heater tank, the coil can often be replaced as a part, if the ...


4

The room thermostat does not control the boiler directly. Instead, it controls a circulating pump that draws heat from the boiler and delivers it to the radiator(s) in the room. It is the removal of heat that subsequently causes the boiler to fire, when its thermostat indicates that its internal temperature has dropped because of the heat removal. It sounds ...


4

Your tank is in fact not oval, but stadium in profile. (Yes, that's where the sports facilities got their name.) In the case of a tank measuring 60" × 40" × 27", your volume is (nominally) that of a box measuring 60 × (40-27) × 27 plus a cylinder of diameter 27 (radius 13.5) and length 60. 60 × 13 × 27 = 21,060 cubic ...


4

TL;DR: is there a way to put the zone valves into a forced-closed position? Taco zone-valve (wax piston actator): disconnect top wire at contact marked #1 and wait 2 mins, or disconnect all wires, wait two minutes, rotate head and remove. Zone valves with a synchronous motor remove the head. Further to Tkw's answer, heres the inside of a zone valve. ...


4

If you can stop the flow of water in the system you can freeze the water in the pipe, then fix whatever you have to. This works on steel and copper pipe. I have frozen pipes up to 2 inches. A pipe freezing kit is great but you can also use dry ice. Find a place that sells dry ice and buy the crushed type. Make sure you use heavy gloves to protect your hands....


4

TLDR: Plastic tubing seems the safest to use. You may be able to use certain types of metal in some cases, but acidity in the condensate can damage those materials. ICC model building code as an example says the following (in part): SECTION 314 - CONDENSATE DISPOSAL [M] 314.1 Fuel-burning appliances. Liquid combustion byproducts of condensing ...


4

It's a new problem. First, do anything you want. It's your health and there's no legal mandate, yet. The legionella issue is actually quite new. The disease itself wasn't even identifed until 1976 at the US Bicentennial in Philadelphia, when a bunch of people at a hotel got sick and died. Only this mass-casualty event made anyone notice and start to ...


3

I have a gas hot water base board system with an expansion tank. The tank has a drain valve to which I can attach a garden hose. I drain the tank at the beginning of the heating system and check it on occasion. If the gas boiler pressure rises quickly then the expansion tank probably needs draining. I may drain mine once over the winter. I don't understand ...


3

Most pilot light devices have a sensor that detects that the pilot light is lit, and will shut off the pilot gas if it doesn't detect the lit flame. This sensor must heat up in order to detect the flame, so after you light your pilot light, keep the pilot valve depressed for 30 seconds in order to ensure the sensor heats up. After 30 seconds, release the ...


3

A lot depends on the type of system you have. If you have a system or combi boiler, it could be the diverter valve which is faulty. This will be in the boiler itself. If you have a Y-Plan system with a three port valve, it could be the three port valve which is faulty. These are usually found in your airing cupboard or in your loft.


3

The basic chemistry of efficient natural gas burning is about a 10:1 air to fuel ratio. The air at high altitudes has less oxygen per volume (the air is less dense) There are a number of ways to compensate. Derate the burner by decreasing the fuel orifice size. This returns the burner to the correct air-fuel ratio, but produces less heat. This method ...


3

For rented or owned accomodation the HSE guidance is reasonably clear Since 31 October 1998, any room converted to use as sleeping accommodation should not contain the following types of gas appliances: A gas fire, gas space heater or a gas water heater (including a gas boiler) over 14 kilowatts gross input unless it is room sealed. A gas fire, ...


3

Low water Air lock or circulator not working is most common problems. What is the pressure of system ? Should be around 12 cold 20 hot. Add water to system if lower. You may have automatic feeder. Check for any air bleeder that can be open.


3

The advice is for the purpose of avoiding frozen pipes. The larger the difference in thermostat settings, the longer the heat will be off. The longer the heat is off, the bigger the temperature differences between the cold parts of the room and the warm parts of the room. Your thermostat is likely to be in a warmer part of the room (inside wall, at eye ...


3

Other than looking for hidden bleeders (i.e. I have one where the baseboard cover needs to be removed to reveal the bleeder) and bleeding any bleeders that you can find, you may need to swear at whoever put in the new radiators and retrofit bleeders where they are missing. There is often an automatic bleeder/vent on or just after (in which case it's often ...


Only top voted, non community-wiki answers of a minimum length are eligible