Search: Posts Made By: atulc
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Replies: 1
Views: 497
Posted By atulc

Reinstalling brass immersion well

While removing a sensor on an old American Standard Arcoliner boiler, I managed to loosen the immersion well leading to a slow drip. See this thread...
Replies: 42
Views: 2,751
Posted By atulc

Spott, Being a novice at this, I was first...

Spott,
Being a novice at this, I was first concerned about sealing the well opening. However, others weighed in on this thread and convinced me there was no need to seal the well opening. My most...
Replies: 42
Views: 2,751
Posted By atulc

Just received a sensor for Honeywell L7224U. It...

Just received a sensor for Honeywell L7224U. It came with the rubber seal as shown in post# 22 above. However, this is not a seal for the boiler sensor well. It's a knockout plug to cover the 1/2"...
Replies: 42
Views: 2,751
Posted By atulc

I spoke with Carlin Support and learnt that the...

I spoke with Carlin Support and learnt that the 90524A boiler control is no longer produced. They recommended using Hydrostat 3250 Plus. The Hydrostat, like the Honeywell L7224U and many other...
Replies: 4
Views: 3,280
Posted By atulc

Here's a detailed training video on the Riello 40...

Here's a detailed training video on the Riello 40 F series burner ... https://www.youtube.com/watch?v=5qcFgyGRgrk . Hope this helps.

Edit:
Sorry, this training video is for the 40 F series oil...
Replies: 42
Views: 2,751
Posted By atulc

Doughess and Zoesdad, Thanks for the info on no...

Doughess and Zoesdad,
Thanks for the info on no sealing required for boiler wells. I'm set with boilers wells and sensors. Thanks for all your help.

Doughess,
I'll purchase the inexpensive PID...
Replies: 42
Views: 2,751
Posted By atulc

I have access to two boiler immersion wells....

I have access to two boiler immersion wells. Currently, I have separate high-limit and low-limit aquastats mounted on these immersion wells. If I can't fit the sensors for the PC700 and a L7224U in...
Replies: 42
Views: 2,751
Posted By atulc

Doughess, Please note that I plan to use the...

Doughess,
Please note that I plan to use the L7224U only as a backup low and high limit. The PC700/Tekmar 256 will be my primary control and it has an automatic differential feature that adjusts...
Replies: 42
Views: 2,751
Posted By atulc

If I try to achieve a tighter differential than...

If I try to achieve a tighter differential than 10F, won't the boiler be cycling too often? The tighter the differential, the more often the boiler will go on and off, right? Isn't that bad for the...
Replies: 42
Views: 2,751
Posted By atulc

Zoesdad, Taco expandable switching relays do...

Zoesdad,
Taco expandable switching relays do not work in this manner. If the Priority switch is left OFF, the priority zone is treated like any other zone. The heat demand from the priority zone...
Replies: 42
Views: 2,751
Posted By atulc

Geo, Thanks for your comments. I trust...

Geo,

Thanks for your comments.

I trust the low-limit aquastat with the sensor installed in an immersion well a lot more than the Tekmar/Taco boiler temp sensor that is strapped to the supply...
Replies: 42
Views: 2,751
Posted By atulc

Attached is a diagram with pin-out for the...

Attached is a diagram with pin-out for the PC700-2 and the voltages I observed with the PC700-2 connected to the Power Controls molex socket on a Taco SR503-EXP-4 expandable switching relay. There is...
Replies: 42
Views: 2,751
Posted By atulc

Thanks Geo. I'll use some fender washers. The...

Thanks Geo. I'll use some fender washers. The boiler surface doesn't get very hot but fender washers can't hurt.



Doughess - thanks for the clarification.
Replies: 42
Views: 2,751
Posted By atulc

Thanks Geochurchi for your input and Doughess for...

Thanks Geochurchi for your input and Doughess for your further comments.

I'm using a separate natural gas water heater for DHW. I'm using the tankless DHW built into the Arcoliner boiler only for...
Replies: 42
Views: 2,751
Posted By atulc

Doughess, Thanks for addressing questions 3 and...

Doughess,
Thanks for addressing questions 3 and 4 from post #4.

I am awaiting a response to question 1 from both Taco Support and Tekmar OEM Support. Hopefully, I should have an answer in a day...
Replies: 42
Views: 2,751
Posted By atulc

Thanks Spott. Point noted. I think you meant post...

Thanks Spott. Point noted. I think you meant post 2 (referring to the Honeywell L7224-1002,) right?

Doughess and others that might be able to comment on the rest, please weigh in.
Replies: 42
Views: 2,751
Posted By atulc

Spott and Doughess, Thanks for the help. Sorry,...

Spott and Doughess,
Thanks for the help. Sorry, it took me several days to respond. I was researching the options you suggested.

Since the Arcoliner boiler is a non-condensing cast iron boiler, I...
Replies: 42
Views: 2,751
Posted By atulc

Replacing Legacy Controls on AS Arcoliner Boiler with Taco SR503-EXP-4

I am planning to replace the legacy controls on a 1950's American Standard Arcoliner boiler for a hydronic heating system with a modern multi-zone switching relay such as the Taco SR-503-EXP-4. I...
Replies: 4
Views: 1,378
Posted By atulc

Finished tracing the wiring

So I traced the wiring for the legacy boiler controls. I've attached the wiring diagram. The Americast boiler is controlled by two thermostats and a low-limit and a high-limit aquastat. It has a...
Replies: 4
Views: 1,378
Posted By atulc

Grady and Spott - thanks for your help. ...

Grady and Spott - thanks for your help.

Grady,
I had looked at the document you referenced but I only looked at pages 47 and 48 that show diagrams with R132A. The purpose of the R2, W2, and B2...
Replies: 4
Views: 1,378
Posted By atulc

Wiring Diagram for Honeywell R132A Switching Relay

I have a 1950's boiler - American Standard Arcoliner O-153-T - which is controlled by two Honeywell RA832A switching relays connected to two thermostats, a L444A low-limit aquastat, a L4006A...
Replies: 3
Views: 2,693
Posted By atulc

Thanks for the responses. I forgot to...

Thanks for the responses.

I forgot to mention that I live in Westchester County, just north of NYC. I understand your concern about winter freezing. However, I believe there are pumps designed for...
Replies: 3
Views: 2,693
Posted By atulc

Stormwater drainage for low-lying property - outdoor pump

I have an almost flat yard at the bottom of a sloping street. There is no good way to drain the water off the property.

I am considering installing a drywell plus an outdoor sump pump. Normally,...
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