Best Of
Re: Understanding Boiler System in New Home
As far as maintaining rooms in one home at different temperatures. Typically the walls between rooms are not insulated, so some temperature difference is workable, a few degrees.
It would be hard to have one bedroom at 60F and the adjoining at 72F for example. Some of the heat from the warmer room will migrate to any colder spaces.
An energy audit with blower door and infrared scan would shed some light on the loss through windows and walls. That may help with a window upgrade decesion. Once a thermopane window loses the seal and they cloud, not much can be done other than a replacement.
There are many options for levels of low E glass also that can help with both heating and cooling loads, if an when you upgrade.
hot_rod
Re: Understanding Boiler System in New Home
No if moisture is getting between the panes — so they are thermopane or some equivalent — they're done.
The double hung windows to which I was referring are the older single pane windows, usually with weights to counterbalance them. They are worth fixing, and will last a long time (a couple of centures) with care. The newer ones such as you have… not worth fixing, and you've gotten more life out of them than they usually provide.
Re: Help with short cycling on a Weil-McLain GV-5 Boiler
As far as the sequence of operation is concerned,
- It starts with a cold boiler so all the limit and temperature devices on the boiler are closed.
- The fan pressure switch is open to indicate that the fan is not operating
- Then the thermostat (or zone end switch) calls for heat
- The control receives the call for heat and starts the fan to pre-purge (the fan will not start unless the pressure switch is open). The circulator will also operate with a call for heat
- Once the fan starts, the pressure switch closes indicating the fan operation is successful and sends that signal to the control.
- After the alloted time the control starts the trial for ignition, by sending power to the ignitor (hot surface ignition HSI will glow)
- Once the trial HSI is hot enough the control will send power to the gas valve to allow gas to flow to the combustion chamber, past the HSI
- At the same time, the power to the HSI stops and the HSI is then able to be utilized as the flame sensor
- Once the flame is established and the flame sensor indicates to the control that the flame is there then the trial for ignition sequence is terminated. and the burner is allowed to continue the flow of gas.
- If any of the following happens then the gas vlave closes instantly
- High limit opens
- Block temperatiure switch opens
- Fan pressure switch opens
- Flame signal is interupted
- Loss of power to the control
- Then the post purge sequense starts.
- Once the post purge is completed, the start up sequence will start again at the beginning as long as the limits and fan pressure switches are in the start-up position, and there is a call for heat.
Re: Can this happen if the pressure in boiler too low?
@WMno57, like that you referred to a "BLEVE"
- 🎼 So Bye, Bye, Miss American Pie,
- 🎶 Drove my chevy to the BLEVE
- 🎶 but the BLEVE blew up.
- End of song
Re: Help with short cycling on a Weil-McLain GV-5 Boiler
Do you know which GV boiler you have? Series one (1) will not have a series number. All the GV boilers after Series 1 will have a Series number: 2, 3, and so on. Each different series is usually a change in the control system or some other design change This is the wiring diagram for series 1 & 2
and there are two temperature sensors that will cut off the burner while the call for heat continues. If you have a block temperature above 350° or the water temperature is above the adjustable setting on the water temperature limit, the burner will stop but the circulator will continue to operate. the flame light will then go out and the purge light will come on. I don't believe that this is the case for you, since the boiler water temperature is lower than the high limit setting. Double check the limit adjustable setting is at or above 170°
If your GV boiler is a different series, you may have a different issue.
Re: Help with short cycling on a Weil-McLain GV-5 Boiler
If you have the GV5 Series 3 or 4 then your control module is different and you have 2 circulators under the hood. the system circulator pumps the heated water out to the radiator system while the Bypass circulator keeps the boiler return temperature above 130°F to keep the flue gas from condensing inside the cast iron flue passages. That control works differently from the Series 1 and 2 control that operates only one circulator.
The current GV boiler is the GV90+ and is different from series 1, 2, 3, and 4. With the proper information on the boiler series number, ot the serial number that starts with CP xxxxxxxx I may be able to narrow down the place to look for your issue.
Re: Just because "it's Code" doesn't mean it's right
Yes
But some air handlers and many if not most furnace setups are positive pressure so the trap isn't technically needed.
ChrisJ
Re: Homemade Wood Stove Hydronic Radiant Heat Setup
Thank you @Larry Weingarten. Well said.
Re: Weezbo *~/:)
California bans hydronic heating installations.
This was his last post,
Do you think he died as a result of the drought? or laughing too hard? What a way to go!
Re: AFG burner stops in the middle of the night.
That article mentioned that (and Honeywell would not admit to it) if there happened to be a power spike as a precise moment in the start up cycle on that control, that the diac or the triac on that circuit board could be compromised. Since this power spike phenomenon has to happen at a precise moment between the call for heat and the trial for ignition, it hardly ever happened. But once it did, that control will always have this problem. the control would get some bleed electric current to travel across the safety timer heater. Rarely did the bleed electricity ever heat up the safety switch enough to trip the safety switch, For that reason it was considered a non-issue by Honeywell and tech support just said ”that never happened before”.
Where the problem would manifest is if the compromised control had a call for heat for an extended period of time (like overnight during very cold winter days) that safety heater could get hot enough to trip. Now back in the day, the R8184 was the GoTo control for replacing the RA117A stack relay. It was the safer control because the safety timing went from 90 seconds to 45 seconds.
Today that safety timing is considered unsafe and all the electronic relays trip within 15 seconds if there is no flame signal from the Cadmium Cell eye. (also called the Cat’s Eye by some folks with selective hearing)