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In order to answer regarding the support (Booster pump?) I need more info on the system. But 2-way valves are used in variablr flow applications and 3- way in constant flow. One of the reasons for design a variable flow system is to save energy in water pumping. If you have 3 and 2 way vlvs...

Hi I have seen that high voltages ( more than 600v)are the limit to a lot of NEC regulations, so you must invest in comply with them. For 4160v Special insulated cable is required with special connections and test. The feeders , dissconects ,ect also need to have extremly high arc prevension...

LinaABC Fan Arragement are defined by AMCA. They determine the bearing location, means of supporting the motor, and how the fan is driven. There are eight standard arragements for centrifugal fans and two for in-line vane axial ones. beside the standard there are some variations. For...

If you are willing to spend money a good option will be to install a auxiliary water cooled condenser. There are some in the markets used to heatup pools. (although in the www I have only found one good one made in Australia). But, I agree with the rest the air cool condenser coil is designed...

ChillerGuy The expected motor life of the existing unit will drop. Just buy and inverter duty one and have it in stock for when that happens. Actually the VFD will fail to Ground Fault, but the motor will still work on by-pass (w/out VFD). Regarding to the disconnect, as suggested by somebody...

The key to evaluation on this issue is if the plant is or can go to a indepth redesign. The big advantage of variable primary flow is the ability to lower consumption in the pumps and mantain the chiller Kw/ton constant. When partial loads arrive you will still have a very efficient system...