High Voltage Room Airconditioning
High Voltage Room Airconditioning
(OP)
Is there any rules and regulation regarding the installation of air conditioning unit which feed by chilled water system? I am aware for possible water drip off and water leakage on the piping. If so is it applied also to tranformer room and low voltage room?





RE: High Voltage Room Airconditioning
Not allowed. Keep the water (and possible condensation that goes along with it) out of the electrical rooms. If the room needs cooling, set your fan-coil unit outside the room and duct some cold air in.
NEC 110.26(F)(1) gives specifics.
Good on ya,
Goober Dave
RE: High Voltage Room Airconditioning
RE: High Voltage Room Airconditioning
RE: High Voltage Room Airconditioning
IMC requires emergency drain pan under unit with drain pan overflow alarm.
We typically use a double containment pipe for the condensate piping, and a drain pan under the CHW piping, piped to the condensate drain.
RE: High Voltage Room Airconditioning
One more point: Check with AHJ. In one locale, I was forced to take all piping and cooling from the room, the only thing he would accept was a sidewall diffuser across from the electrical gear.
Good on y'all,
Goober Dave