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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19 views

help me find C wire on williamson boiler and where should I connect it

I have Williamson boiler GWA 140,000 BTU. I have 2 zones in my house for heating. On one zone I want to install smart thermostat so, I need C wire. The old thermostat for this zone had 2 wires: red ...
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19 views

c wire on a multi taco zone valve boiler

looking for assurance on what I think is the right setup to add a c wire to a current 2 wire zone setup. See pic of transformer junction box. Currently I have 3 zones using one transformer and 3 taco ...
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15 views

Zone valves and air purge

I have a 3 zone boiler system with baseboard heating. Zone 1 & 2 have nest thermostats, zone3 has a non-programable thermostat. Zone 2 & 3 are not getting hot. Pipes are hot about 3-4 feet out ...
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24 views

Problems w/ Nest

I've got a common problem but I can't seem to find the simple answer. My heating system is simple. Forced water oil boiler with three zones. Two zones are controlled by the Nest E Thermostat. I'm ...
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1answer
75 views

Where do I connect a C-wire to my electric boiler ( Slant/Fin Monitron Boiler )

I'm looking to add a C-wire for my thermostat. My current thermostat has two wires, W and R. But there is another tucked in blue wire. That blue wire isn't connected to the boiler. I'm looking for ...
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30 views

Where should I place the C wire?

I have an old Lennox boiler which doesn't appear to have a PCB board. Originally the old honeywell thermostat had a 2 pair wire attached which included Red and White Wires. I snaked an 18/5 thermostat ...
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2answers
46 views

What is this strange valve/trap from my boiler to condensate pump?

I have a condensate pump attached to a valiant combi boiler with the usual pvc pipe turning into it (removed in picture, but works fine going into the point behind the copper pipe here), with the also ...
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1answer
38 views

What should the input pressure be for a hydronic system?

I have a boiler that's operating range is 12 to 30psi.The documentation says that it loses "efficiency" at the low end of of the operational pressure range. When looking at pressure reducing ...
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32 views

How do you connect a Nest thermostat to a Noritz CB199 DV combi boiler?

I have only one zone and I'm using the internal boiler pump. I do not have any zone valves. I have a 24v transformer and a White Rodgers 90-370 relay.
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34 views

Gas boiler cuts out after being switched on

When I switch on our gas boiler (mynute he), it turns off after approximately 2 seconds. Link to newer model here https://www.vokera.ie/homeowners/boilers/mynute-vhe-2/ I checked a radiator to see if ...
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24 views

Boiler System heats one room more than all others

I have a two zone older natural gas boiler system. All rooms in the house get heat. One room on the second floor gets hotter than all others. Almost like all the heat is going to that room I don’t ...
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1answer
67 views

How does a water mains booster pump work? Isn't the flow rate solely determined by what reaches the property in the first place?

When getting quotes for a boiler replacement, we've been recommended to install a mains booster pump (e.g., Salamander HomeBoost). We live in a 3rd story UK flat and currently get a dismal 5 l/min ...
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48 views

My central heating comes on when it feels like it

I have checked the wireless thermostat is sending a demand signal to the receiver but boiler isn't firing up (BTW my hot water on demand is working fine). Later on the heating comes on until I turn it ...
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18 views

Boiler not responding to external wired switch

My boiler has suddenly stopped receiving signals from the external switch. (models listed below). I'm trying to isolate the faulty component. There is no fault code on the boiler. It seems to be ...
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40 views

How to convert Rancilio Classe 7 USB Espresso Machine from 3 phase to single phase system

I have a Rancilio Classe 7 USB Espresso Machine that is setup for 3-phase power and I'd like to convert it to single-phase power. Is this possible and if so, what do I need to do it? Rancilio Web Site
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1answer
45 views

Mounting a Boiler when the studs are not 16 on center

When looking for the studs to mount a boiler I found the studs are 18" on center. I even double checked my stud finder by using a magnet to find the nails in the drywall and they corroborate ...
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1answer
67 views

Rewiring a boiler’s c wire for a smart thermostat

I want to swap out my low-voltage Honeywell for a Nest E thermostat. When I took the Honeywell off the wall I confirmed that I’ve got a C wire running up to the thermostat but when I wired up the Nest ...
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38 views

Do I have a place for a common wire?

I have a boiler for heat/hot water, with multiple zones. It is a backup for a ductless mini-split installation. I'm trying to work something out where the boiler actually does backup the ductless ...
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15 views

new nest thermostat no c wire

I have a new steam boiler model uh1606hsid boiler, I recently bought a nest thermostat and battery keeps dying, is there a way to connect a c-wire to my boiler?
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12 views

Pilot light issue

Thermocouple has been changed but pilot still wont stay lit. Is it gas controller?nSo what now? I may also have a cracked heat exchanger but that would seem unrelated. A small amount ofwater ...
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3answers
65 views

Thermostat location in 3 story building

Where would you place the thermostat in a single zone, 3 story building. Tt's a multi-family residential, 3 units, one unit per floor. The boiler is a high-efficiency condensing boiler in the basement,...
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25 views

How to calculate temperature rise rate for hydronic water tank

The engineering to figure this out is beyond me! I have a freshwater hot water tank that holds 30 liters of water. It is heated by hot water (coolant) running through an internal pipe (the heat ...
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22 views

Boiler Flame Pattern

I have a propane fueled boiler for all my hot water / heating needs in USA. I was looking at the flame pattern today, it was louder than normal and “stuttering” on the left 3 burners . The right ones ...
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1answer
25 views

Would missing check valve make it seem like heat is always on?

We had an extra zone added to our hot water heating system. The installer used a Taco 007-F5 circulator pump but did not install a check valve like the other zones have. I have verified the pump does ...
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1answer
34 views

What is a 94+ AFUE gas boiler?

I saw that my Natural Gas provider stated I could receive a benefit if I had one or installed one, so I was wondering what it was.
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10 views

Closet installation of gas boiler

We have a gas-fired steam boiler (Williamson Thermoflo GSA-150) that heats our house. We're finishing the basement and would like to close off the boiler and water heater (also gas) in a small room. ...
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16 views

What is the advantage of a using a “Zone Controller”?

Looking at most pre-fab hydronic panels, the provide a Zone Controller. Initially I though they were used to stage the activation of the pump until after the valve was able to open but, looking at ...
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2answers
78 views

3/4" compression coupling leaking for alpine burnham U.S. boiler

My 3/4" compression coupler, which is attached between the alpine burnham boiler's condensate trap stub and the pvc pipe that takes condensate to the neutralizer is leaking. I replaced this ...
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2answers
43 views

Replacing a gas boiler fan - UK gas safe regulations

Is it legal (UK law) to replace the fan on a domestic gas boiler yourself? The replacement (according to the manual) involves three screws and two blade connectors. The price of a new fan from the ...
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20 views

Braided stainless water line to boiler expansion tank?

My boiler expansion tank (Amtrol EX-30) hangs on a 1/2” type L copper pipe suspended from a 1/2" copper tee. The bottom of the tank (the air valve) is within an inch of the floor, which makes it ...
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28 views

stats on *total* cost of high-efficiency boiler?

Not trying to start a subjective debate here, just looking for some objective statistics. I get that high-efficiency boilers are much more efficient, and will save big bucks over their lifetime in ...
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19 views

How to wire in gas boiler zone valves with out a zvc

Does anyone have a basic wiring schematic for wiring up 3 zone valves without a zone valve controller? They are honeywell zone valves. The boiler is brand new and everything is prewired. It just ...
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15 views

Boiler turning cold in middle of use

I have a valiant boiler ecotec 824 that was service about 4 months ago but has suddenly had a problem where the hot water for either the shower or the taps will run hot but flick between being luke ...
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1answer
32 views

Is it ok to use vinyl sheet as a temp cover for a boiler flue hole?

I have an unsealed boiler flue hole like the picture: I was going to acquire and use some vinyl sheet however I have just realized I have some cushion vinyl lying around. As a temporary fix, will it ...
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57 views

Why does boiler flue have to be sealed on both sides?

My boiler flue isn't sealed on the inside. Only the outside. I read it needs to be sealed on both sides. But why does it need to be sealed on the inside? Since its unsealed at the moment I can see ...
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2answers
92 views

Boiler losing pressure overnight

so, i have an ideal logic combi boiler which although working seemingly well , the pressure drops to almost 0 when not use, mainly overnight. I do not need to re-pressurise the system as when i turn ...
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113 views

How close can pex tubing be to a boiler?

I am adding radiators to my 2-pipe central heating (UK). The whole piping is copper 22mm and microbore, and I'm extending it with 15mm pex barrier pipe graded for central heating. I know that the ...
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1answer
660 views

How close can I put a fridge-freezer to a gas boiler?

I have an older (20-30 years ) old gas boiler mounted on the wall, and a space to put a fridge-freezer at 90 degrees to it around 20cm away. I know we want to avoid radiators/boilers ( which does ...
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1answer
99 views

Connecting a C-wire to a Burnham Independence Boiler

I would like to install a Sensi thermostat which requires a c-wire. I am planning to run a new thermostat wire, since the old one was 18/2. I am trying to figure out the correct way to wire the c-wire ...
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13 views

Boiler Leak - Discharge Pipe - After Water Outage

Recently had our water supply off for about 24 hours due to a main break and didn't turn off the pipes to the house. I noticed today that the discharge pipe is slowly dripping. What is the cause/...
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41 views

Condensate drain termination

i have a 40mm boss connection at the top of a horizontal soil stack that runs in the room. I'm intending to put a washing machine stand pipe at the end of this. I also have a Vaillant ecotec pro 28 ...
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0answers
60 views

Connect “C” wire on boiler model number 1135-601

I've read several threads here and on the other websites but still can't figure out how to add C wire to my boiler wiring. I would like to replace my old mercury thermostat with Nest E or any other ...
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6 views

Can the required water demand flow rate be configured on a combo boiler?

I need to run the hot water quite fast for the boiler to react to the demand and start heating the water. Can I configure this rate somehow? Specifically, I'd like to be able to wash my hands in hot ...
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67 views

Need to drain boiler expansion tank but no drain valve

Been having intermittent banging during heating season. It happens around once a month and the whole house shakes. The gas company believes that it's a bad expansion tank. The old-style expansion tank ...
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1answer
58 views

Can’t shut off power to heat-only (hydronic baseboard) thermostat

I have no AC in my condo, only hydronic baseboard heat, currently controlled by an old mercury thermostat. I have a new smart thermostat with a c-wire adapter I want to replace it. Trouble is, I’ve ...
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1answer
61 views

Thoughts on furnace generator transfer switch install

I'm replacing my cast iron boiler for hydronic heating and domestic hot water in Massachusetts. Plans are to install a new Viessmann gas fired condensing boiler. Living in New England, it's not out of ...
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81 views

Noisy circulator pump

I live on the 4th floor at a 9-story building (60+ units in total). For the last few months I have been hearing an annoying humming / whining noise. After some inspection I realized that the source of ...
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2answers
250 views

Is there a recommended size for vents in boiler cupboard doors?

I have replaced doors in my house and would like to replace a plain boiler cupboard door — standard 1981mm x 762mm (6½ft by 2½ft) door — with a 6-panel door matching the ...
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1answer
28 views

Will old cast iron Baseray baseboards work with a steam boiler?

forgive me if this question is amateurish. We recently removed some old cast iron Baseray baseboards from a house which were being heated with hot water. I'm wondering, can these baseboards be used ...
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4answers
73 views

Thermostatic control of an unmanaged energy source to supply hot water cylinder

I have a solid wood burner that contains a heat exchanger. There is no guarantee that the combustion can be regulated. This heat exchanger feeds a loop that acts as the source heat exchanger in a hot ...

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