Security Seal Facebook Twitter GooglePlus Pinterest Newsletter Sign-up
The Wall
Tim McElwain

Tim McElwain

Joined on August 17, 2009

Last Post on August 27, 2014

Contact User

Recent Posts

« 1 2 3 4 5 6 ... 134 »

I can't find any info

@ June 1, 2014 7:32 PM in Anyone have any info on a Robert Gordon Appliances Model ST250A gas conversion burner

on this Roberts Gordon unit. I have info on the 325 which is an up-shot conversion burner which typically was powered with a Powerpile system and required a metal spreader be in place around the upshot burner so secondary air was controlled to the burner.

What seems to be the problem with the unit?

Do you have

@ June 1, 2014 7:29 PM in Trane Heat Exchanger

air conditioning? If so does the conditioned air pass directly through the horizontal furnace or does it go through a bypass duct system around the furnace?

Moisture and condensate from AC can cause damage to heat exchangers especially if you are subject to very humid conditions.

Your furnace has two heat

@ June 1, 2014 3:02 PM in Trane Heat Exchanger

exchangers one which is the primary which is the tube shaped, the other that looks like a car radiator is the secondary heat exchanger. The secondary is the one most likely to leak condensate as it is the one which cause condensing to take place. Trane is a reputable company and I am sure will make good on the exchanger. Your issue is going to be the labor incurred by the first company and then labor from the new company coming to finish the job. Getting reimbursed from Trane could get tricky.

The fact that this is a horizontally mounted unit and condensing is it located in an attic? If so it is susceptible to having the condensate freeze which could damage the secondary HE.

Jody Samuel a great addition

@ May 26, 2014 6:19 PM in Jody Samuel a great addition

to the Caleffi team. I have known him from his days with Trainco Heatmaker and recently with Viessmann. Congratulations to Jody and the Caleffi team.

Thanks Frenchy

@ May 23, 2014 5:37 PM in Raypak flame rectification problem

you are a true gentleman. You are right we often miss the simple things as we go looking for the complex. Good catch!

Frenchy never

@ May 22, 2014 11:54 PM in Raypak flame rectification problem

got back to tell us. This is very typical here. People present problems answers are given and we never hear from them again.

A stainless steel

@ May 19, 2014 1:40 PM in Flue liner question

liner is good for both gas and oil. What are your plans as far as a conversion burner? What is your location?

I am not an engineer

@ May 18, 2014 7:21 PM in Issues with & Replacement of Honeywell L8148E Aquastat

but have many years experience (74 years old) and due to liability I would never attempt what you are trying to do. Replace the entire relay or upgrade as Robert O'Brien suggested.

I would however caution you that if your gas valve is Powerpile it could simply be the powerpile circuit and polishing up those relay contacts only gave it the little umph it needed. Take some readings before you replace an entire relay. I say that but the contacts are probably shot already. The L8148J allows you by the way operation with the powerpile system operation in a power failure by placing the system on gravity feed and switching the switch on the side of the relay to manual.

That relay is not

@ May 16, 2014 7:10 PM in Issues with & Replacement of Honeywell L8148E Aquastat

replaceable you need to replace the entire L8148J. Are you a homeowner or a technician?

I would suggest having a professional check this system before you spend money and find out you have a millivolt problem.

Is your gas valve

@ May 16, 2014 4:52 PM in Issues with & Replacement of Honeywell L8148E Aquastat

24 volts or Powerpile (millivolts)?

The "J" version is the L8148J Universal replacement relay. If you have a millivolt system sometimes it will act erratic due to loose wires or poor connections at the relay.

The full model number for the "J" is L8148J-1009.

The procedure for troubleshooting powerpile is located on this site at resources-library-Tims Closet.

You guys sound

@ May 15, 2014 7:43 PM in Galvanized pipng for gas

like a bunch of old gas men. That was when men were really men.

The relay

@ May 13, 2014 11:51 AM in Troubleshoot GVD-6 problem

wired between 4 and 2 is defective. When you go to override (manual) also called hold open the system will work as you are bypassing the relay. When in manual you have a direct feed to the motor which will cause the damper to open and close the two end switches and bring on the equipment.

The diagram in the books is not very good. I have a internal diagram of the damper which I can fax you or e-mail contact me at

Do not repair

@ May 5, 2014 6:25 PM in Pilot lit but burners not igniting

flooded appliances "Replace Them".

CO could have exploded

@ May 5, 2014 6:22 PM in House goes boom during CO investigation

as it has flammabilty limits from 12.5% to 74% or it could be hydrogen from the fire which has flammabilty limits from 4% to 85%. The movie "Backdraft" illustrated this fact.

I could not get access to the

@ May 3, 2014 9:34 PM in Carbon Monoxide/Smoke Alarm Interlock

information, however this sounds like a real problem. What level will the "interlock" shut off the heating equipment. Will it also shut off the water heater, gas oven, outdoor grill, etc. This is not a good thing and it does not solve anything just as what Mass does is not the answer. It just keeps the plumbing and mechanical boards happy that they think they have done something. Read Bobs posting as I agree fully with everything he posted.

Happy Birthday

@ May 3, 2014 9:27 PM in Happy Birthday M.E.

my friend!

It has been my experience

@ April 28, 2014 11:07 AM in Thermostat wire

especially in dealing with Powerpile self generating systems using millivolts that solid wire tends to be the better way to go, especially when having to twist two wires together (splice) and then solder. I never really took precise measurements but it always seemed that stranded wire on millivolt (DC) just offered more resistance there fore a greater millivolt drop across connections.

On AC my understanding of skin effect is due to opposing currents as related to the magnetic field created around the wire. So more likely a problem with wire selection on AC

You are having a

@ April 26, 2014 6:40 PM in Got a problem for Timmie (SE)

delayed ignition not flashback. The burner should light in less than 4 seconds. Have a professional take a look at the equipment as a number of things can cause a delayed ignition.

Yes I am suggesting the

@ April 25, 2014 5:45 PM in Oil to Gas Conversion

power gas burner as the least expensive option and keep the indirect, or go with a gas storage water heater 30, 40 or 50 gallon depending on your needs. The Carlin EZ Pro would be ideal for that boiler. What is your location in NJ? There are folks in the area that are very good at doing conversion burners.

You will end up with efficiency at least equal to what you have with oil and maybe a little more.

The cost to get gas into the house depends on the utility the contractor does not do that. You would then need to get a quote on the burner plus cost to run the piping inside the house from the contractor. Make sure the contractor is versed on installing gas conversion burners and will also run a combustion analysis when the burner installation is complete.

We do not discuss prices

@ April 24, 2014 12:56 PM in Oil to Gas Conversion

on this site.

Your boiler would be good candidate for a power gas conversion burner due to its age. That would cost less than a boiler or other possible solutions.

Mass Code any one

@ April 23, 2014 7:04 PM in Mass Code any one

know if Mass has updated their NFPA acceptance, last I knew was NFPA 54 was 2002 and NFPA 58 was also 2002?

I would shut off the affected

@ April 21, 2014 6:46 PM in Contractor kicked out of house for doing CO test

equipment, disconnect the fuel source cap it off and send the customer a registered letter confirming my actions. I may have just saved some ones life.
« 1 2 3 4 5 6 ... 134 »