Install Instructions

133
IM-PR 566442 1114 (Design Manual)
* The number of full 360° turns open from a fully
closed position
Circuit 1 is the longest at 250', so it is fully open
(counter clockwise). Circuit 2 is 200', so divide 200'
by 250', which equals 0.8. Then multiply 0.8 by 10,
and the answer is 8. This represents the number
of 360° turns open needed for proper balancing
(counter clockwise).
NOTE: Each 360° turn of the memory spindle
restricts approximately 10% of flow.
5.14 Maintenance
Glycol solutions should be checked each year
using a suitable refractometer to determine
glycol concentration. Check the concentration
of corrosion inhibitor periodically, following
procedures recommended by the glycol
manufacturer. Typically, glycol manufacturers offer
a maintenance service for a reasonable cost.
Figure 5-18 Balancing valve instructions
Circuit Circuit Length
Number of Turns Open
to Set Memory Spindle
1 250'
250/250 x 10 = 10 turns
(fully open)
2 200' 200/250 x 10 = 8 turns
3 150' 150/250 x 10 = 5 turns
4 100' 100/250 x 10 = 4 turns
Circuit Length (ft)
Longest Length (ft)
x 10 =
# of Turns for
Balancing*
Remove tam-
per-resistant cap
(counter clockwise)
Open memory spindle
of the longest loop fully
(counter clockwise)
Close all other
memory spindles fully
(clockwise)
Turn the memory
spindle counter
clockwise slowly to
achieve desired balance
(calculation above)
Turn tamper-resistant
cap back on
(clockwise)