Pro Refrigeration CHILSTAR Series Operation Manual page 13

Packaged Glycol Chiller Systems | 11
STEP 6
Con rm your pump rotation and that you have ad adequate ow. Motor Rotation is clockwise when viewed from
Motor end. If rotation is backwards, you will need to switch any two leads (3 phase systems only) on the incom-
ing power supply. Indication of ow does not insure proper pump rotation! In reverse rotation the glycol pump
ow is signi cantly reduced and will e ect chiller operation.
To con rm ow ,check the Flow Meter. If no ow is indicated, it is likely there is an air lock in the pump and
you will need to bleed the air from system. Con rm both valves are open and try cycling the power to the pump
OFF and ON . If still no ow, turn power o and carefully open the plug located on the stainless steel head of the
pump, bleed air from pump head and re-tighten pump head plug.
STEP 7
After 15-30 minutes of ushing, turn STAGE / CHILLER switches OFF and drain the water from system and
tank. If no tank is installed open up your piping inside the processing plant and drain water. It is important to
drain as much water as possible from tank jackets and heat exchangers. Any remaining water will dilute glycol
concentration and could also leave contaminants within piping loop.
If a tank is installed use a Wet/Dry vacuum to clean out any particles inside the tank. It is important to get as
much debris as possible. Any debris left in the system can cause solenoid valves to hang open or not fully open.
STEP 8
Close the piping system and we are now ready to charge the system with a minimum of 35% USP Grade Propyl-
ene Glycol / 65% Water. Use a refractometer or glycol percentage tester to insure the proper glycol concentration.
With the system completely drained, charge the system with one part glycol for every 2 parts of clean water. As
you introduce the glycol to the piping system, additional glycol/water will need to be added. Operating level of
the glycol solution must be within 4-6" from top of tank.