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Found this today, the IT guy was proud of himself for protecting his servers from a leak in the tenant space above.

Does anybody know of a spray lubricant that is odorless that we can use on mechanical dampers that are in the air stream
and not cause the whole building to have a sick day. We use to use Liquid...

We just got a new account with a DX system that has (2) 5H60 Carrier compressors, the owner told us he thought the last contractor converted
the system from R-22 to R-407C. There are no labels or...

GOODMAN, the hackers unit of choice.

Two nice polls to tie off to for fall protection.

What a dummy, he forgot the flare nut !!!

Must be an EMT shortage.

That's how you install it when you need to reverse the supply and return on a side discharge.

If there is a hole in the backyard fence I know where to get the blocks to fix it.

Thanks for the response, It looks like it will work if you set it up as pressure dependent and get away
from the velocity controller. I was mainly curious if anyone has ever seen an installation...

We just started servicing a building that has two large VAV package units and a hot water boiler with pump all located on the roof, this system is very common for the area. Downstairs in the suite...

The balancing valve should be installed in the return line on the system side of the by-pass line. That way the coil or its by-pass line will never use more water than its designed for.

Your amp draw will be under FLA because the head pressure is low. Your expansion valves are hunting because you don't have the required 100 psig MOP. The suction is less that 100 psig from the...

The pitch of the swamper matches the slope on the mountain.

Went on a call today and found the last tenant removed their AC unit when they moved. The new tenant felt thet needed some air so they had one of our fellow craftsman borrow some air from another...

Cut a hole in the floor and you have a perimeter heater for the porch.

When I send my duck to work he refuses to wear boots.

The pump will never wear out.

They really need to paint the unistrut.

Someone installed their ice machine outside.

Who gets to clean the spray tree & nozzles:gah: ?

One of the big problems is he will be the helper for the next several years.
That can be physically challenging as well as mentally challenging to take orders from someone half his age.

You could build a small cooling tower by converting a side discharge evaporative cooler (swamp cooler). Use a small external pump and connect the suction side to the bottom of the sump. The pump...

If the air conditioning thing doesn't work out you can always go into
movie making.

www.solidyne.com

OSA temperature was commonly used in commercial buildings with alot of solar exposure (glass) to bring on the refrigeration system. The load of a glass building will be effected more by OSA. The...

Over the years there have been several attempts to use high pressure duct systems in commercial office buildings (4" to 8"wc). The advantages were smaller duct (cheaper) and less attic space...

Thank You.

I just inherited this building with a small system 600 panel. Its primarly used for start-stop and some elementary control functions. The owner wants to keep it because its currently working. There...

We have a customer that installed screen material (like you find in your screen door) over the fresh air intakes, its very effective but has to be cleaned regularly.

When you have a receiver in the system it is no longer a critical charge unit. A proper charge is having the pick-up tube in the receiver covered in liquid under all operating conditions. Most...

We have had issues while freeing up frozen economizer dampers on large air handlers with odors in the building from the lubricant we use. Liquid wrench seems to work the best but stinks the most. ...

You will need to pressurize it, locate and repair the leak(s). Tell your boss to calm down, when new equipment fails on start-up there will be a labor and material allowance from the factory. It...

Has anybody used Dupont ISCEON M099 (R-438a) refrigerant as a direct replacement for R-22 yet ? If you have, what size system and how did it work ?

Thanks

Start up time is directly related to the quality of the installation. If it is a 1st class installation the start up will be smooth and short. If it was installed by Hackmaster Incorporated it...

Yellow flashing light on Mcquay WSHP is low temp. Is it tripping in heating or cooling ?

Brass is made from copper and zinc. If there is anything in the machine that is brass and wearing or going away, it could breakdown and show zinc, it would probably show copper too.

ravbc402be03b does not look like a good number.

Once you put air into the attic space it becomes a plenum and will be subject to all the rules such as no exposed wood (flammables) all wiring in conduit or plenum rated, etc. At least thats the way...

A small cooling tower would work, it will do at least 10 degrees and the operating cost would be significantly lower. Size it off of your current pump flow and the desired delta T.

...

The standard for industrial timers for years was Agastat.

Does anybody still make a 7.5 ton package heat pump with the over/under duct configuration to replace a Carrier 50MA series unit ? Thanks

The disconnect is fine, its the unit thats leaning.

At our safety meeting this morning I told him to where his shirt, they never listen.

It sounds like its time for a solid state starter.

One of the 1st things to be checked when you have low oil pressure on a 5H compressor and its not noisey is the oil regulator valve. It is located under a large hex nut on the nose of the compressor...

It looks like a 5 ton rooftop heat pump.
This is the closest thing I have.

In most cases the CHW pumps will not shut down on chiller setpoint. The pumps are generally controlled by OSA, RA,etc.

#1 - Both pumps need to operate whenever the chiller is running. The primary pump ensures that there is always correct flow through the chiller. The secondary pump pulls chilled water off the...

I have used the Cypress wireless digital/pneumatic zones thermostats. By the time you install the thermostats and repeaters, then fix the exisitng actuators and velocity controllers a real DDC system...