VYPER
™
VARIABLE SPEED DRIVE
INSTALLATION
100-210 IOM (
JUL
09)
Page 20
COOLANT TEMPERATURE LIMITS
Liquid supply cooling temperature limits vary between Water
and Glycol cooled units. The required coolant flow rate is
based on the maximum temperature of the coolant type to
be used.
GENERAL COOLING SYSTEM
REQUIREMENTS
• Vyper
™
Liquid-cooled 700/912 HP models provide one
in. NPT threaded male connections IN and OUT of the
heat exchanger for customer connections.
• Sufficient clearance to perform normal service and main
-
tenance work should be provided around the entire unit.
Figure 8 - Minimum Flow Rates - WATER
Entering Coolant Temperature Limits
Coolant Type
Min
Max
Water
40°F (4°C)
105°F (41°C)
Glycol
35°F (2°C)
105°F (41°C)
Table 8 – Entering Coolant Temperature Limits.
• An upstream strainer is recommended to stop particulate
matter from entering the heat exchanger. The strainer
should be cleaned several times during the first twenty-four
hours of operation.
• Refer to the charts in Figures 8 and 9 for minimum flow
rates.
WATER RECOMMENDATIONS
• Frick recommends a closed-loop system for the customer-
supplied water side of the heat exchanger.
• Frick recommends a water pH level between 6.0 and 7.4
for proper heat exchanger life.
• When adding a
booster pump to supply condenser water
to the heat exchanger of the water-cooled Vyper
™
, choose
a pump which will supply the proper GPM based on the
drive size and temperature of coolant where a 700 HP
drive would require 16 gallons @ 102.5°F at 10 or 15 feet
of head minimum. See Figure 8.
GLYCOL RECOMMENDATIONS
• Propylene Glycol is to be used exclusively. Glycol concen
-
tration must be 50% or less by volume. See Figure 9.
