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Titan Central Chillers
8.1
OPERATIONS BELOW 48°F FLUID OR 38°F AMBIENT
A.
The chiller is never to be operated below 48°F leaving water temperature without several
precautionary measures. All controls are factory adjusted for 48°F and above operations.
B.
Before readjusting the protective devices, a satisfactory antifreeze solution must be
substituted for the recirculating chilled water. This mixture will consist of inhibited
propylene glycol and water. Do not substitute an inhibited propylene glycol and water
solution with common automotive type antifreeze. The chart on the next page outlines the
glycol percentages at various water temperatures.
C.
Fluid must be tested with a refractometer to verify proper glycol percentages for freeze
protection. The ratio shall be according to the chart below. Too much glycol can cause
capacity and control problems.
D.
DO NOT USE AUTOMOTIVE TYPE ANTI-FREEZE. WARNING: do not use any type
or brand of automotive antifreeze. Automotive antifreeze contains corrosion inhibitors -
silicates - designed for compatibility with the materials in automotive engines. Silicates
can gel and cause deposits to foul and insulate heat exchanger surfaces. In your chilling
system that can mean higher energy costs, high pumping costs, and possibly even shut
downs for system cleaning. We recommend the use of DowFrost or Monsanto DFS-1.
E.
Once a satisfactory antifreeze solution is in place the protective devices may be adjusted
and the control instrument can be unlocked to allow operation below 48°F. Protective
devices include the low refrigerant pressure switches and freezestats, although not all
units are equipped with dedicated freezestats.
F.
The Unit may be equipped with :
1.
Digital Low Pressure Switch
2.
Mechanical Low Pressure Switch
3.
Fixed Low Pressure Switch
G.
Digital Low Pressure Switch
1.
If the unit is equipped with the optional Digital
Pressurestats, refer to Section 3.9 in this manual
for information to adjust the Low Pressure Switch.
2.
Adjust the low pressure switch according to the
specifications in the chart on the next page.
H.
Mechanical Low Pressure Switch
1.
If your unit is equipped with an adjustable low pressure switch,
adjust the low pressure switch according to the specifications
in the chart on the next page.
2.
Adjust the low pressure switch according to the specifications
in the chart on the next page.
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729
Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
RESET TRIP
SET UP
539
505
TOGGLE DISPLAY
SET DOWN
HEAD
SUCTION
PRESSURE
PRESSURE
REFRIGERANT PRESSURESTAT
Digital Pressurestat Control
Adjustable low
pressure switch
Page: 80
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