October 2020 9Dry Cooler Install Manual
Piping Connection
Piping General Considerations
Refer to the equipment main label and stickers at lines/piping termination to verify respective connecting
lines’ sizes, flow directions (IN/OUT) and media type (water, glycol/water mixture and ratio etc.)
oFlow direction stickers at respective piping stubs refer to the equipment it’s attached to: IN –media
(water, glycol etc.) entering the equipment, OUT –leaving the equipment.
oSelect the line/piping size based on the equipment documentation (labels, drawings, etc.). Note that
diameters of the piping stubs/connections may be different from the required line size.
Use proper materials and pipe joining methods, respective to given system (system media, pressure, etc.).
Use proper installation field practices and Code(s) requirements (proper piping support, no pipe-to-edge
contact, grounding/bonding, insulation, pressure testing, charging/filling, etc.)
As/where needed, ensure that proper isolation and balancing means (valves, circuit setters, etc.) are in place.
Provide proper means for priming (filling), draining and aerating (bleeding the air from the system): install
automatic air bleeding valve(s) at each local top point of the system and drain/priming valves at the lowest
point(s) of the system.
Line Set Selection and Sizing
•Refer to fluid cooler (and/or equipment it serves) data (main label etc.) for line set typical diameter (both lines,
supply and return, are normally of the same size).
oTypical line set diameter accounts for system proper operation if line set total equivalent length does
not exceed (approx.):
200’ – for NG-V-02 fluid cooler model*
300’ – for NG-V-12 fluid cooler model
450’ – for other fluid cooler models
oIf the total equivalent length exceeds above value, the line set diameter must be increased to next size
(e.g., step up diameter from 1 ¼” to 1 ½”). Contact the manufacturer for more details, if needed**.
* in some cases, NG-V-02 fluid cooler model may accommodate higher total equivalent length with typical diameter –
contact the manufacturer for details.
** typically, the fluid cooler is either provided with the pump package or serves the equipment, equipped with its own
pump, therefore no additional pump is needed. However, in some cases additional pump may be required. Contact the
manufacturer if needed.
•Standard recommended pipe and fitting materials are PVC, steel and copper. Other materials may also be
suitable –refer to material applicability according to given application (system media, max working pressure,
temperature, etc.).
