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One 200 ton chiller with 35 tons at peak!! I am going to guess that this is an air cooled chiller as well. Chiller loops, piping, require that the volume of the system be enough to accomodate a...

Yes, you can do this. These units typically have 2-speed compressors and need to have a matched coil for the condensing unit. If you want the airconditioning to work correctly then this is the most...

You would need Orcaview to do the programming of the of the Bacstats. The service tool is a bluetooth device which connects to the individual controller which allows you to see the whole network,...

Condensation is probably due to clogged condensate pan drains. Algae that accumulates in the pan dries up when the heat runs and then when the cooling season rolls around again, the condensation...

Just call Kimball and ask him. RLS PE

Good old cascade control!

You don't want DAT = 55 when ST = SP. It will hunt too much and be too cool most of the time.

At 100F, you may get too much...

I am not sure how big your guest rooms are but I would think the total room load would not exceed 1-ton each. So for saftey sake lets say you have a total cooling load of 300 tons. Probably too much...

A fixed balancing valve in a variable flow system will only achieve the desired flow through it at maximum flow. In other words, balancing valves are not effective in variable flow systems. This is...

If I understand your concern correctly the reference point should not be to the outside. The control would be similar to a variable volume air handler where you maintain fan speed based upon duct...

You want to maintain a dust static pressure most of the time. These systems are tricky depending on how they are laid out and the number of fans involved. Lab exhaust also generally requires a...

PTAC's have an opening in them for ventilation requirements anyway. Unless they have been capped and outside air is being introduced to the space via a 100% outside air unit. If you are in a high...

I believe measuring across the coil is the best method. The point is to be able achieve full flow at design conditions. I assume you are talking about a pressure independent characterized control...

I have been enjoying reading posts and getting a feel for the site. Thought it was time to say hello. Mechanical engineer in Florida with a background in HVAC commercial system designs in all types...

Pressure Dependent is nothing more than a sophisticated balancing damper (fixed) used in a variable volume system. Pressure Independent varies with system pressure (fan static) to maintain a constant...

First, you are going to have a problem with the pumps and bypass line when a single chiller starts to unload. Let's say the chiller, 250 tons, can unload to 25%. That's 62 tons at 2 GPM per ton or...