HP (Hewlett-Packard) PS-025 Refrigerator User Manual


 
PS QuarterHorse Series Chillers Page 13
; If you want to use straight water, contact Application Engineering’s,
Engineering Department.
; The 1 gallon (3.8 liter) reservoir is not designed to withstand water pressure
above 5 psi (34 kPa).
; The fill opening and vent line must be vented to the atmosphere for proper
operation.
Properly Venting and Filling the Reservoir Tank
To properly vent and fill the tank:
Remove the side panel, then remove the bushing installed on the top of the
tank.
Install a pipe nipple and tee to the ¾” coupling on top of the tank.
Use one side of the tee for the vent line and the other side for the fill line.
Fill the tank.
Remove the fittings and re-install the bushing
Extend the vent line from the tank to a proper drain.
Re-install the side panel.
Figure 3
Ethylene Glycol Curve
Ethylene glycol required
Normal operating range is between 30°F and 70°F
for evaporator freeze protection
Chilled water
operating temperature °F
(set point)
10%
20%
30%
Ethylene
glycol
percent
by
volume
0%
30º 40º 50º 60º 70º