2 winters ago I had a new oil fired peerless boiler (WBV3) with riello burner installed in my long island home. I have 3 zones (upstairs, downstairs, & Peerless partner 40 gallon indirect WH) I have water savers on all our showerheads. Last year I had the company install a priority zone when domestic water called for heat due to frequent cold showers during the winter. Today after my sons 10 minute shower the hot water ran out. I have a feeling this is due to the honeywell aquatstat settings and WH settings. I do not want to waste oil but the settings are probably the cause. Looking for any advise. The settings are as follows. 40 Gal Indirect WH - set at 125 low on boiler 130 high at 180 diff 15. Thanks in advance.

 

Hi,

What did they install?

Is the indirect piped with a circ or zonevalve?

I think the consensus from what I read here on this site is HI 180, LO 150, Diff 20 when working with tanless coils. Dont know if it applies here.

Also although 2 yrs old it may be possible the heatexchanger in the indirect is calcified.

How is your water quality?

Mike NJ

 

Hello,
I'd say something is wrong.

Have you ever measured how many gallons per minute the "water saver" showers flow?

I think the pro's here will need lots of pictures in detail.
Piping, pumps, aquastat settings, boiler temperatures, etc.

Is there any chance the model is PP-40-DW ?

Is there a mixing valve on the hot water output?

Does the 125 degree water burn when it comes out of the sink?

Have you ever timed how long it takes the boler to heat the hot water tank?
Does it take more than one boiler cycle?

I have a somewhat similar set up. Old time superstor 40 and a boiler firing at .60 gallon per hour. With the 1.6< gallon per minute shower head i have, it can probably stay in the shower all day without running out of hot water. Although an hour is about the longest i've tried.

In the short run you could try turning up the aquastat setting on the water heater to 140.

Peter

 

it has a zone valve. water quality is very good so calcification is most likely not problem. Thanks

 

I have not taken measurements. The 125 is very hot coming out of faucet. I do believe it is a pp 40 dw. I'm pretty sure it has a water mixer, don't really know what im looking at. I can take some pictures and post later. Thanks!