Small Chill Water System
Small Chill Water System
(OP)
I am trying to put together a small chiller system for an existing in-row cooling unit in a server room. [u]We are keeping the in-row cooler[/u]. Is it acceptable to purchase a 3 ton residential type condensing unit and then match it with an indoor refrigerant to water brazed plate heat exchanger with all the necessary pressure, temperature, flow and refrigerant controls.
I understand that I will have to include some kind of low ambient control on the condensing unit.
I am also installing a buffer tank and small expansion tank on the chillwater side.
There are complete systems available - both glycol and split - but they are cost prohibitive.
Any tips would be appreciated.
I understand that I will have to include some kind of low ambient control on the condensing unit.
I am also installing a buffer tank and small expansion tank on the chillwater side.
There are complete systems available - both glycol and split - but they are cost prohibitive.
Any tips would be appreciated.





RE: Small Chill Water System
RE: Small Chill Water System
I'm going to 0F for low ambient. Indiana. We've been using our building chiller all winter anyway - that can't be good.
I haven't paid enough attention to low ambient until I started to research this project. I've been quoted refrigeration units to cope with the low ambient.
RE: Small Chill Water System
There's also a device on the market called a Rawal valve that is supposed to offer some form of condenser capacity control as well. I haven't really studied how that device works but I know it's been around awhile. Could be similar to a "headmaster" control used in commercial refrigeration.
RE: Small Chill Water System
RE: Small Chill Water System
RE: Small Chill Water System
We will keep the in row unit connected to the building chill water system. We'll just open the isolation valves if needed.
I do have a vendor that can put together a standard residential condensing unit with low ambient control(s). I am already seriously considering a walk in cooler type unit. It has the head pressure control that has been referred to.
RE: Small Chill Water System