11
PIPING RECOMMENDATIONS
Insulate supply and return piping
The drawing on the next page shows features that should be included in the piping system. Supplemental details
and additional recommendations are listed here:
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True union or flanged valves for serviceability
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Standard ball valve on purge line
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Additional ball valve upstream of Y-strainer for servicing
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Check valve on chiller supply line
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Two options for return line:
(1) Inverted trap with air vent valve and vacuum breaker, or
(2) Electronic actuated valve, wired to process pump starter
in chiller electrical enclosure
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Use closed-cell foam insulation
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Install protective cladding
Materials: Schedule 80 PVC or ABS
typical for cold glycol/water systems
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Verify operating temperatures
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High temp systems may require copper or stainless steel piping
Install isolation ball valves
externally at chiller supply and return ports
Glycol backflow prevention measures:
ADJUSTING GLYCOL SUPPLY PRESSURE
The chiller contains a dynamic fluid bypass valve on the supply line.
Refer to "CONTROLLER AND NAVIGATION" section to adjust the
pressure setting.
HANDWHEEL
PACKING NUT
FLUID BYPASS VALVE
WARNING: VERIFY TANK JACKET RATINGS BEFORE PRESSURIZING PIPING
WZ^^hZ'h'
Wye-strainer (20 mesh)
on chiller return line
INSTALLATION GUIDE • USER MANUAL
VERTICAL AIR SERIES
G&D CHILLERS, INC.
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GD-VA-R2022
C
