Koolance ERM-3K4U5 - Manual (Page 14)

9 User Manual
Power Connection
The ERM-3K4U has a primary power connection on the rear side. This will accept
either 120V/60Hz or 220V/50Hz inputs. The main AC power switch will be illuminated
whenever power is supplied to the ERM-3K4U unit, whether the switch is “ON” or
“OFF”. The “ON” position is indicated with an arrow: ◄.
Pump Connections
The ERM-3K4U can have up to fi ve pump inlet and outlet connections (depending
on the model) on the back of the unit. All pump lines run through a shared heat
exchanger and reservoir. There is no internal separation of liquid. Since each
pump has a dedicated power switch, not all pumps must be connected or operated
simultaneously.
Each pump inlet/outlet is typically confi gured as a separate “loop” to maintain
coolant pressure and fl ow rate. That is, one or more heat sources (from one or
more computers) can be chained in series on a single pump loop. The restrictions
on this depends on the acceptable temperature range at each heat source. Adding
components such as water blocks, fi ttings, quick disconnects, and tubing will reduce
coolant pressure and fl ow rate and this can increase temperatures of each heat
source on the loop.
Tubing single pump loops is not a universal rule, however, and some applications
may benefi t from combining various pump inlets and/or outlets together. The ERM-
3K4U conveniently lends itself to experimentation, but that is largely beyond the
scope of this user manual.
Pump 1 Pump 2 Pump 3 Pump 4 Pump 5
(Number of pumps present varies by model.)