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Joined on November 8, 2009

Last Post on April 9, 2014

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Nema 1

@ April 9, 2014 10:01 AM in Controls cabinet

Nema 1, indoor something in the 3'x 3' size

Controls cabinet

@ April 8, 2014 10:48 PM in Controls cabinet

Does anyone know of a good affordable control cabinet? I know kele makes a line that has a hinged door, and was wondering if there is any other manufacturer that may make something a little less costly. Thanks to all


@ April 5, 2014 10:05 PM in oil to gas conversion kit

Thanks for the response, i will look into that. If at all possible i am going to try and sway the customer into replacing the boier with a gas fired mod/con boiler.thanks

oil to gas conversion kit

@ April 4, 2014 7:21 PM in oil to gas conversion kit

does anyone know if an oil to gas conversion kit is made, and if so by who, to convert a residential oil fired boiler to gas? I know this is fairly common with larger commercial turn down, duel fuel burners, but was unsure if there was such a product for smaller single stage units. we have a job where e customer has a 15 year oil  fired boiler, but has natural gas in the house and wants to convert the boiler to gas. seeing how the boiler is not that awfully old if this was something that s made it would be a lot less costly to install it rather then replace the whole boiler. thanks to all 

Kill a watt meter?

@ March 5, 2014 8:39 PM in computer room heat gain question

What is that, and what is the differance and using a regular volt amp meter to determine the watts consumed by this equipment, and it's heat output?

computer room heat gain question

@ March 5, 2014 7:23 AM in computer room heat gain question

does anyone have a rule of thumb as to how much heat gain there is from a standard desktop computer, like you would have in your house? i have a job where the customer has moved their call center to an interior room within in their space. in this office there are four occupants, and six desk top computers. the size of the room is 280 ft2, 3920 ft3, the space has no exposed walls, and is served by a rooftop unit that serves other areas that require heat, and cool, where this room will only need ac year around. the six desktops are all the same model where on the back it shows 5 amps @ 120 volts. that would add up to 600 watts, and 2,046 btu's each. is this the best assumption to make as to how much heat these computers put out, or does anyone know a better way to go about this. thanks to all.


@ January 26, 2014 9:33 PM in replacing condensing gas heat exchanger

the only reason I replaced the heat exchanger was because it was under a lifetime  warranty, and it was for a family member that is trying to sell their house. I am aware that the labor credit  tops out at twenty years, and this furnace is well beyond that. replacing the secondary heat exchanger was a piece of cake, and I found out that it can be slide out without messing with the primary, however I would suggest to anyone that has to do this, if there is any doubt about the primary cells to go ahead and replace them, which I did because they are also under a lifetime warranty. thanks again

replacing condensing gas heat exchanger

@ January 22, 2014 8:54 PM in replacing condensing gas heat exchanger

does anyone know if the secondary heat exchanger on a carrier model #58sxc furnace can be replaced without removing the primary heat exchanger? I have a family member that has one that  is leaking, and I have ordered the replacement heat exchanger, which unfortunately came with a lifetime warranty, and am planning on replacing both even though through testing it only appears that the secondary is cracked. I have never replaced one of this model before, and am just going by an exploded view of the unit. i tried to convince them to replace the furnace, they would get a better warranty, and all new parts, but they chose to replace the faulty part. any input would be appreciated. thanks to all. 

Holes face in

@ January 7, 2014 11:12 AM in prolem with lennox pulse furnace

The kidney shaped holes face in towards the heat exchanger, that the way they are facing. Thanks


@ January 7, 2014 7:53 AM in prolem with lennox pulse furnace

thanks to all, i have the pulse furnace heat exchanger test kit and have used it several times.this furnace's heat exchanger seems to be ok, but i feel at this point replacement is the only option. i was able to get it to fire when i went back to measure up for a new furnace. this furnace's has become less reliable that replacement is the best option. the only saving grace is that this house has four systems, and when one is not working sometimes it is not even noticable.

Furnace still not firing

@ January 4, 2014 11:00 PM in prolem with lennox pulse furnace

I installed the tune up kit today, and the pulse furnace will not fire at all. With the old parts it would fire about once every three times, now it does not fire at all. You here the sparking and see manifold pressure, however it does not fire. I do not know what do at this point, as everything I have done to this point has resulted in a dead end. I can't think of anything else to chek or replace.


@ January 2, 2014 10:58 PM in prolem with lennox pulse furnace

Thanks for the response, I ordered the tune up kit today and am going to install it as soon as the kit arrives.

prolem with lennox pulse furnace

@ January 1, 2014 7:54 PM in prolem with lennox pulse furnace

happy new year to all. I had a call today on a lennox pulse furnace m# g140 4/5-100-6. the ignition model was off on lockout with a code of no flame sensed. I reset the furnace at the thermostat, and it fired off on the first try. upon checking the manifold pressure it was dead on (2'' of w.c as stated on the nameplate to be the maximum) and the flame signal was right where it has been in the past (4.5 ua) I have worked on this furnace for several years, and recorded the readings of the manifold, flame signal, temperature rise and combustion test readings. all seemed to be normal, and was right where it was when I did the maintenance on the furnace back in October. upon cycling the furnace several times, about once every three times, it did not light although you can hear the sparking, and read the correct manifold pressure at the outlet of the gas valve. I confirmed that the combustion blower is operating, and turns off after flame is established, which is normal for pulse ignition. the combustion blower, spark plug, flame sensor, and cables were all replaced on this furnace back in 2009, and appear to be in good condition, and not the cause of this intermittent ignition problem. the only thing that I can come up with that could be the problem where it just doesn't light off is if one of, or both the gas flapper and the air flapper valve are not opening when the need to. i have never replaced either of the flapper valves on this furnace, and am posting this to see if anyone else has come across this problem where a pulse furnace every couple of cycles just doesn't establish ignition. if I locked out once a heating season, that could be lived with, but it is now more often not firing off then firing off. thanks to all I know this is a long post

mr. slim trouble code?

@ December 18, 2013 10:51 PM in mr. slim trouble code?

does anyone know if a Mitsubishi mr. slim unit with the following information:
model# msz09un (indoor unit)   model#muz09un (outdoor unit)
has a trouble code if the green light on the indoor unit blinks five times, then pauses for two seconds, then blinks another five times. does this indicate a trouble code, and if so what is it? I have not been to this site, and am trying to troubleshoot this remotely. thanks to all in advance.

rydlyme descaler

@ December 13, 2013 9:16 PM in rydlyme descaler

has anyone used rydlyme descaler, and if so what did they think of it compared to some of the products that nu-calgon  makes. we have a job where we have to clean about twenty  50 ton water cooled condensers that are not rod able, and need to be pumped clean. I have never used rydlyme but it is getting a lot of advertisement in our area. thanks to all

just dirt

@ November 20, 2013 8:32 PM in cleaning a plate and frame heat exchanger

Mostly dirt and other stuff found in an open cooling tower system

cleaning a plate and frame heat exchanger

@ November 19, 2013 7:39 PM in cleaning a plate and frame heat exchanger

does anyone know the best mild detergent to use when scrubbing down the plates of plate and frame heat exchanger? the manufacture recommends using nitric acid, and water. I do not want to use any acids if necessary, because we would be scrubbing them down on the roof of the building (rubber roof) thanks to all

info. on york self contained

@ November 18, 2013 8:17 PM in info. on york self contained

I am looking for an o&m manual on a York self contained unit model# dvw050.this unit is only six years old, and I have tried going through the local York office with no results. thanks to all 

beckett cleancut pump

@ November 10, 2013 12:03 AM in beckett cleancut pump

when bleeding a beckett cleancut oil pump that has a solenoid on it, should you get oil out of the bleeder when the bleeder is opened (pump running), even if the solenoid is closed? thanks to all

nfpa 54/common vent sizing

@ September 25, 2013 10:13 PM in nfpa 54/common vent sizing

does anyone know which nfpa 54 table is used to size the common vent flue pipe size for category 1 furnaces? we have a job where we are doing an oil to gas conversion,and would be install five 120 mbh category 1 furnaces,relining the chimney and i need to find out how to size the common vent that the five furnaces would tie into.they give some examples in the book,but i did not see any that had five furnaces.thanks to all

txv too small

@ August 28, 2013 10:53 PM in txv too small

I was working on a carrier water source heat pump today (r410a) m#50 hq installed in april 2013.there was a certified air balance done on the unit, and airflow does not appear to be an issue.the problem is both circuits (6 ton two stage unit) are running with low suction pressure (95-100 psi) to the point where the outlet of the txv starts to ice up and the unit goes out on freeze protection. this occurs on both circuits. the charge has been removed and weighed back in to what is on the nameplate. even though this is a six ton unit with two isolated three ton circuits, the txvs are only rated at two tons each. does anyone else find this odd that you would have a six ton unit with txvs only capable of supplying four tons of refrigeration across the evaporator coil. both txvs seemed to be maintaining a good superheat (12-15 degrees) in the evaporator, it just seems that the evaporator is being starved of refrigerant, and the txvs cannot open any further  

chilled water coil delta t

@ August 5, 2013 7:28 PM in chilled water coil delta t

does anyone know if there is a formula to find what the air temperature drop should be across a chilled water coil, if the gpm,airflow,and water temperature drop is know? thanks to all
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