Questions tagged [boiler]

The boiler is used in a central heating system to heat water that is pumped through pipes to radiators within the home.

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13 views

C wire possibly on my boiler/heat pump

Hey so I know this is annoying and asked way too often but the wife wants a WiFi thermostat and of course I don’t have a “c” wire hooked up and there is no “c” terminal on my control board. We have ...
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29 views

What is the purpose of boiler damper?

Gas hydronic boilers usually have a mechanically controlled damper along the way of its ventilation stack, typically near the appliance itself, for proximity of electrical connection. Is their only ...
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Hydronic boiler flue ventilation

My gas hydronic boiler is designed (or just specified) to require a draft hood and a damper on its 6" flue. My question is, on a level lower that going by the dictates of the spec, how much less ...
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22 views

Why does my radiant heater have multiple zone valves?

I have in-floor water radiant heating. There are five zones of varying sizes. In some larger zones there are multiple circulation loops split from the supply and then recombined for the return. I ...
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1answer
28 views

Neutral Wire on Oil Boiler

I am going to help out a friend hook up their nest thermostat and as you might have guessed it's only a 2 wire at the location of the thermostat. Since the cheaper and newer version of the Nest ...
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1answer
62 views

is it okay if heat exchanger's secondary is connected reverse

We bought a house with floor heating, and replaced the old boiler. We installed a Saunier Duval Isofast condens 21 gas burning boiler and an external Zilmet zb190 heat exchanger between the boiler and ...
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Hydronic boiler sharing 20A circuit

I would like to connect my hydronic boiler to a 20A circuit already loaded by a microwave and a range hood. The label on the boiler says it draws LESS THAN 12A. Does this run a risk of overloading ...
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Pressure testing gas hydronic boiler

I just bought a used gas hydronic boiler at an antique shop. I have not yet installed it and the item is still returnable if dysfunctional. I was wondering if it would be a good idea to pressure test ...
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35 views

Hydronic boiler electrical connection

Every hydronic boiler (for radiators) I've seen had a direct wire electrical connection into an adjacent box, meaning disconnection requires electrical work. I would like to my new boiler more ...
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Choice of steel pipe for extending boiler water sockets

I bought a used hydronic boiler at an antique shop and it came with 1-1/4" (can't tell if galvanized or black due to corrosion) steel fittings for water in and out sockets. In extending them for ...
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32 views

Boiler flue adapting to chimney vent pipe

I bought a used hydronic boiler at an antique shop to replace my old one. It came with a flue that reduces from 6" at the appliance box to 5" after a draft hood and a vent damper. My ...
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22 views

Adding a C wire to Lochinvar Boiler - 2 zones

I am trying to connect an ecobee which requires a C wire to my 2 zone heating system - boiler is a brand new Lonchinvar. My current thermostat only has a red and white wire (I have no AC, just heat). ...
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69 views

Boiler turns on briefly throughout the night

We moved house a few months ago and our property either has the same or a very similar boiler to our old house. It's a condensing boiler, a Worcester Greenstar 37cdi and the controls look identical. ...
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Should condensate pipe go below vent and how?

Need to lay condensate pipe from the boiler room to the waste pipe, on the other side of my flat. Will use condensate pump and use loft as proxy. I want to drill through ceiling from my boiler storage ...
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111 views

Hive Wiring Advice - Combi Boiler

I've just moved house and am trying to wire up the hive (as I did in my previous house with no problems). I have a combi boiler (Ideal Logic 30) and a single-channel hive receiver. The old thermostat (...
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1answer
65 views

I think my gas boiler flue looks off

We had a gas boiler installed. The registered installer did not highlight any issues with fitting the boiler before fitting it. I was away when the job was done and now there is a "snorkel" ...
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Trying to wire a nest thermostat E in UK with 2 live wire and 2 neutrals

I live in the UK and am trying to replace a Honeywell WiFi thermostat with a Google Nest thermostat E. I have 2 3-core wires coming into my thermostat, 2 live and 2 neutral wires, 1 pair I believe are ...
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51 views

Can I build a small basement under wood cabin and add an electrical boiler 30L for shower and sink?

Can I build a small basement under wood cabin and add an electrical boiler 30L (e.g. Ariston Andris) for shower and sink that would be at ground floor?
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79 views

Can't get boiler to stop heating! It's 80 degrees in the house

I have two boiler systems. One for the heating of the house, and one for sink/shower hot water. The boiler for the house will not turn off! It does kick on and off for a duration of time like it ...
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31 views

How to further troubleshoot a problem with my condensate pump?

During a recent trip to be basement I noticed that the floor was wet under my condensate pump. This pump collects the water from my water heater but it's powered through my boiler. There was a lot of ...
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Is there a way to relieve the pressure on a model 30 expansion tank without draining the system?

I want to change my Xtrol model 30 expansion tank on my boiler. It is not waterlogged but 15 years old and I'm getting ready to sell the house. Plus the pressure has been going a little higher than ...
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2answers
175 views

Why do some multi-zone heating systems have multiple circulators?

In a lot of photos I've seen here and elsewhere of hot water home heating systems with multiple zones, each zone has its own circulator. In my two-zone system there is one circulator, with a zone ...
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55 views

Can I have independent heating zones with a standard boiler?

We have a new standard gas boiler in our home along with two thermostats, one for the basement and one for the rest of the house (living room, bedrooms, etc). The problem we're having is that the ...
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How do I test and maintain the expansion tank on my boiler?

I don’t know what maintenance or adjustments are possible on an expansion tank. I understand from the answer to this question that it needs to be "pre charged" to accommodate the range of ...
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1answer
46 views

How can I increase boiler system pressure so bleeding 3rd floor radiators is easier?

It is very difficult to bleed air out of my 3rd floor radiators. I need at least 23 pounds according to the gage on the boiler, and ideally closer to 30 (but not too close!), to speed things up. The ...
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C-wire nest to burnham boiler

Connecting nest learning 3rd gen to burnham series 2 model 203 boiler. I am only using the system for heat. I have three wires at the thermostat R,W and an unused green that I would like to turn ...
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1answer
63 views

How do a boiler’s autofill valve and expansion tank work together as a system?

How do the expansion tank and automatic fill / reducing valve work together in a hot water heating system? It seems to me that if the expansion tank is charged too high the autofill valve will never ...
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66 views

Does this boiler flame look ok?

This is my natural gas hot water heating boiler flame. It lights up initially with a fair bit of orange flame, and after 10 seconds or so settles into what's pictured. I believe it mostly looks as ...
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29 views

Boiler Gauge Readings

Trying to understand this gauge and ensure everything is working as intended. I know the top part is the temperature of the water I am assuming at the boiler. Again PSI of the water pressure, but what ...
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3answers
123 views

Where can I install a C-Wire for Weil-McLain gas boiler? (EGH 115, 4 Series, Natural gas)

I want to install a C-wire so that I can use a WiFi Thermostat. Behind my current thermostat there are only 2 wires (red and white) There are 2 wires tucked and unused, (green and blue) I had tried ...
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1answer
32 views

Gas Boiler Furnace not igniting

So I got a boiler that had not been used in a bit, maybe a couple of years but was working. The last time they needed to have some come light the boiler. My assumption there was the ignitor was going ...
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45 views

Should I get a condensing boiler or atmospheric boiler for cast iron radiator system

I am looking to replace the boiler as part of a basement reno. The house was built in 1903 and has cast iron hot water radiators but we've done a fair amount of work to it, added insulation and have ...
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116 views

How can I switch a circulation pump between continuous power and thermostat control?

I have a dedicated 20 amp circuit powering my boiler's control unit. The control unit is basically a relay operated by the thermostat that 1) fires the boiler and 2) turns a circulating pump on and ...
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1answer
62 views

No water flow through zone of water boiler, all other zones working. How to get water flowing?

tl;dr - How can I get water flowing through one of my zones of a baseboard boiler heat system? I have baseboard boiler heat with 10 zones (5 per boiler). One of the zones (unfortunately, it's our ...
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22 views

Oil burner Fuel line adjustment

In my crawlspace, I have an oil tank at the front of the house, with the fuel line running to the rear of the house where the oil burner is located. Fuel line is on the floor, running mostly along a ...
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Adding Aquastat for hydronics to existing steam boiler

I have a steam boiler in a residential home of a friend of mine. He asked me if I would take a look at his system. Someone added a circulator to his steam boiler so that he could get heat in his ...
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89 views

Water heater boiler has nasty red sludge leaking out of it

My water heater wasn’t performing as expected today while attempting to draw a 2nd bath. So I went to look and the rusty water leak seemed somewhat prominent, so I’ve gone ahead and opened up the unit....
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Heating Issue — hot water baseboards

and thank you. I have a gas hot water boiler, two story house, hot water baseboards on top and first floor, boiler in the basement, separate circulating pump and loop for each floor. The boiler kicks ...
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2answers
108 views

How do I bleed a very old radiator and identify whether my system is steam or hot water?

All radiators are heating except one, so I'm trying to bleed it. There doesn't seem to be an obvious bleed valve (unless it's that nondescript, frozen, simple bolt on the top front corner of the left ...
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1answer
116 views

Filling a Viessmann Vitodens 100W that has dropped to minimum pressure

I have a Viessmann Vitodens 100-W that heats my house, and I presume delivers hot water too. I must confess I have been negligent, and never had it serviced. The unit is 8 years old. I will get it ...
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1answer
59 views

Extra powerful boiler short-cycling and overfilling

I have a gas powered steam radiator heating system with 8 radiators in the entire house. I replaced my old heating boiler with Crown Bsi138enpzzpsu 138K BTU which is way too powerful for my house. My ...
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1answer
89 views

How do I move a hot-water convector?

I have a "breakfast nook" section of my kitchen with a large hot water convector installed along the baseboards of two walls. Because of other elements in the heating system located close ...
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1answer
69 views

How to find source of leak in heating pipes under concrete / glued floors?

Update 2021.01.11 In case this helps anyone - I was able to trace the leak and make the repair in the end. Steps were this: Locate leak as closely as possible by isolating areas of the heating system ...
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Should I clean my boiler room duct (ventilation)?

Our boiler room in our house is in our half above/half below ground basement. We have a new 100,000 BTU boiler that was installed last year. We also have a gas hot water heater next to it. In the ...
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62 views

Why does my first floor thermostat also make my third floor baseboards turn on?

(Possibly related to this question but I do not have the expertise to diagnose at the level of the author of that question) I moved into a new house recently that was billed as having three heating ...
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1answer
46 views

Thermostat C wiring issue

I am having a two-wire system oil boiler with two-zone valves. I installed two Nest E and worked fine but it started to swing the valves due to the charging cycle. So I decided to run a new C wire ...
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Why is my boiler intermittently shutting off?

I have a Burnham boiler model pvg8ani-gs. It shuts off for no obvious reason. It might run for 1 minute or 30 seconds and then might stay running. I have replaced the board and it still has the same ...
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1k views

Bleed radiators with no valve - is this valve near the boiler what I want?

I recently bought a house, and with the winter starting to set in (UK), have started putting the heating on in the mornings/ evenings. As many people are at the moment, I am currently working from ...
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144 views

Can I use 1 Nest Thermostat with 2 boilers?

I have 2 boilers in my house. 1 is for the main house and the other one is for the annex which is built a few feet away from the main house. My 1st boiler is connected to Nest thermostat. Can I ...
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Why does my Vaillant boiler shut itself off every day?

I'm subtenant and I have Vaillant boiler (don't know which model). Every time I use shower after few minutes boiler shuts itself down and the burner lockout indicator is flashing. I'm then without hot ...

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