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INSTALLATION GUIDE • USER MANUAL
PIPING RECOMMENDATIONS
The drawing on the next page shows features that should be included in the piping system. Supplemental details
and additional recommendations are listed here:
Insulate supply and return piping
•
Use closed-cell foam insulation
•
Install protective cladding
Materials: Schedule 80 PVC or ABS typical for cold glycol/water systems
Verify operating temperatures
•
High temp systems may require copper or stainless steel piping
•
Install isolation ball valves externally at chiller supply and return ports
•
True union or flanged valves for serviceability
Wye-strainer (20 mesh) on chiller return line
Standard ball valve on purge line
•
•
Additional ball valve upstream of Y-strainer for servicing
Glycol backflow prevention measures:
•
Check valve on chiller supply line
•
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
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.
WARNING: VERIFY TANK JACKET RATINGS BEFORE PRESSURIZING PIPING
G&D CHILLERS, INC.
•
GD-VA-R2022C
VERTICAL AIR SERIES
HANDWHEEL
PACKING NUT
FLUID BYPASS VALVE
11
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