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on older units we have rhino lined the inside of the towers after patching the soft spots. It buys them a couple more years and is way cheaper then replacement. Gives them time to plan the...

first,

This isn't a new house and you didnt pay / contract to have it installed, and based on the patches who is to say that the former homeowners didnt mess with the duct themselves?

...

it could also be a head preasure controler cycling the fan off to maintain head preasure. If it is that old I wonder how the strip heaters are wired in? The outdoor unit needs to lock out when the...

your letting it go, or you realize you are making a fool of yourself on the first week you have been here? Also equipment platforms are 18" high in garages in the america's, not 32"

matt

you cannot use pvc. It does not carry a 25/50 rating and is not allowed in open plenum space for drain lines either. The underground pipe we use such as k-27 and pvc coated spiral has a "UL" listing...

could you please, I am in need of a refresher course from the almighty frosty.

matt

so, in your part of the country, your gas valve (pilot and main same time) turn on first, then the hot surface ignitor, then the combustion blower motor, is that how "frosty's unit" works?


matt

ok, just as a reminder the gas valve can only come on "after" the combustion motor is "working" and proves it to the preasure switch. Let me guess you will make up some story about a jumped out,...

the air would be so dilluted by the combustion air that it wouldnt even matter, even after seven seconds, plus at the cfm rate the air is being discharged (positive side). The only way you could...

is this for a liebert?

matt

you must not understand the question!! If you label it wring in the network, it may only run during ocupied or not run at the correct times when used in conjunction with an exhaust system.

Do...

The unit you are descibing is a "make up air unit", period!!!! A unit that is bringing in 100% outside air (for oa requiremnts based on ocupancy and dumping into each r/a plenum or onto each floor)...

Wow, did you charge them to put in a Liebert, and then put in a Goodman? Now you realize why they cost what they cost. They would have had all the proper low ambient controls, humidification,...

If I were you, first I would disreguard half of these posts, they have no clue what your doing.

Here is what I have done on dyno rooms before and some were engineered and some were design build....

You are way off on your tonnage, you have a hood exhaust system going in and what are you doing about Make Up Air? You will have no ceiling so all of you air will be at the top of the ceiling. I'm...

matt

I would hope anybody that is commercial knows nailer. There is also Titus, shoemaker, J&J, Hart & Cooley etc...


There are specific reigister / grill / difuser types for various air flow...

when the terminals blow like that, I automatically condem. Did the unit loose its charge as well? You know the copper lines are done for and any repair would be a waste of money and a service...

Are you going to "wet" connect your joints?


matt

3rd year!!!

matt

If this wall is fire rated is it 1 or 2 hour? Is it a hallway or a corridor? Do the dampers have to be fire smoke combos or just curtain/ radiant type? what is going to control them? The wall...

the only thing I do with ductboard is tear it out. I do almost 100% commercial now, but have done track in the past for companys doing several thousand houses per year, and we used no dampers....

he doesnt say what part of the country he's in, but I would still say majority have none. Some regions it may be standard. (the register doenst count as a damper, refering to in line at the branch)....

my house in boise, 2755 sq ft, 2-story with a 4-ton. Variable speed with 2 -stage (5-ton drive set at 350 cfm). Winter temp 0 and summer high 108. Strugles about three weeks a year upstairs and runs...

Just so you know, that hole you cut in the sheetrock just breached the fire rated seperation from your garage to your house (1 hour rating). You would have better luck callling a company out to take...

keep that old 1 hp motor out of the old unit, it looks brand new! I bet their gas and electric bill are cut in half, the noise is 20% of the old unit and the house will hold 70 degrees 24 /7....

This isnt a DIY site (you obv. didnt read the rules), and I can only imagine how hacked this will look after you are done. Have fun with roof leaks, heat / cooling loss, the electrical and I hope you...

also, I hope the a/c drain isnt hard piped into the furnace drain without an air gap.


This looks way to much like DIY!!!


matt

that fitting on the side of the furnace is a water trap!! shoud have stayed with the 2" then went to 3" in the vertical. Also your drain tubes apear to be still set for horizontal which is the...

converting from over under to side by side is always better then making a 1/2 crossover box. Are you in arizona or vegas? The couple feet of flex should be no prob if installed properly, and this def...

Do not put in the 5 ton with the 100k, how much vault could you possibly have in a 2 story 1800 sq ft? the 80 is all you need. A proper calc will tell you the same, dont be a fool, if you buy the...

you need to be 12" above the roof as long as the pitch is less then a 6/12. also must be clear of windows and overhangs above it .

matt

please show me where it says you can use "romex" (wire rather then seperate insulated wires)

yes you can use "non metalic" flex, but you can't run romex inside of it. the insulation over the wire...

um, no it can't!! (and i'm not an electrician)


matt

what is the actual city? what are the model numbers they are using? what is the square footage of house? (1) or (2) story? will they let you upgrade it still or is it to late?

matt

I see why the second whip off the disconect is long so you can get the door off, but why not a chase nipple into the unit through the disconect to eliminate that extra flex. Just a thought.


You...

make sure your return is lined, and use a bar type return that is turned so you cant look into it (if this is high on the wall) to help angle any noise up at the ceiling rather then down where it...

"romex" is not allowed to be ran inside "conduit" or "flex" (sealtite). The romex insulation will heat up and could melt depending on the amps and is not rated for that. If he puts a box on the wall...

when you install them, read your voltage and adjust the multi tap accordingly. Those strips are rated for both voltages (208 & 230/240) and their output(amps) will vary as well depending. To answer...

what city are you in? that 5 ton on that house with a 100k is oversized, what size is in there now and how long ago was that done? I have installed in nor cal for a brief period, are you by sac or...

the TDD080 downflow XV80 will fit it is 17.5 wide!


matt

the xv80 he is quoting is a 5 ton blower and there is no way a 1800 ft house in nor cal needs that. What city are you in? Is there a/c on this system? They are right that there are only 4 choices on...

you need to quit looking at the sight glass, you are using 404a not r-22. It should be clear (maybe a bubble or 2)at -10, not when its 30 deg. What are you running for defrost settings and at what...

he knows its not a filter, this homeowner not only needs a new pad(and I always sell them at least (1) extra) but they need a in-line "filter" on their water inlet line to help the pad last longer...

Well, I hate to say it, but if you "were" a "sheetmeal" instaler you would now weather or not to use screws in a dryer vent, how many feet of pipe and how many elbows are allowed by code as to not...

This one should get locked down for sure. Asking about grease duct in a residential section! Cant imagine what his plans are for the fire rated shaft / enclosure on this one.

matt

2 scissor lifts with blocks of wood and either material lifts or high reach forklifts to get it on the scissors (unless you have 6 guys on the job). I usually go with 12'-16' max, anything more you...

gravity furnaces are garbage. you may end up with a 40k btu furnace but here are some things to think about.

combustion air

gas line (does it need to be re-located)

flu vent (you need a new...

is this a 2 stage thermostat? you need c, r, y1 and y2. this unit may not require r but not sure without model number. As far as the fans, that is just the head preasure controler cycling the fans on...

my e-mail is in my sig, very interested. we do commercial & industrial for private, public works, ag, military etc...


matt