Dectron LD Series Installation Manual

G – Piping Connection
INM.XX.X.00 G-5 April, 2018
Fluid Cooler Piping (NG models)
Line Set Selection and Sizing
 Refer to dehumidifier and/or fluid cooler main labels for line set typical diameter (both lines, supply and return,
are normally of the same size); note that size may differ from respective piping connections size at the
dehumidifier and fluid cooler.
o Typical 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
o If the total equivalent length exceeds above value, the line set diameter must be upsized to next size
(e.g., step up diameter from 1 ¼” to 1 ½”). Contact the factory 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 factory for details.
** typically, the fluid cooler is provided with pump package or serves the dehumidifier, equipped with its own pump,
therefore no additional pump is needed. However, in some cases (fluid cooler and dehumidifier are not packaged with
pump or in case of extremely high total equivalent length, etc.) additional’ pump may be required. Contact the factory 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.).
Piping
 Ensure proper piping support and bracing is in place – fluid cooler and dehumidifier pipe terminations do not
provide structural support for pipe line set.
 Proper piping practices (cleaning, sanding, reaming, wet-ragging during soldering, etc.) and bonding methods,
respective to pipe and fittings material (soft soldering, gluing, etc.) must be followed.
 Fluid cooler and dehumidifier pipe terminations stickers (IN/OUT) refer to respective equipment:
o Identify correct system pipe terminations (typically labeled as “AC fluid” or “Cooling”)
o Connect fluid cooler OUT to dehumidifier IN; connect fluid cooler IN to dehumidifier OUT.
 Install valves/devices to isolate, drain, charge and remove the air from the fluid cooler and line set.
o Fluid cooler typically is not provided with isolating valves – install as needed.
o Install drain/charge valve(s) at the lowest point(s) of the line set; install air bleeding valve(s) at the top
point(s) of the line set (see Pic. G.3, (A) and (B)).
o Fluid cooler and dehumidifier would typically have drain/charge valves installed at their lowest point(s).
o Pump package (if fluid cooler is equipped or provided separately with one) typically includes pump with
pressure gauges and expansion tank; same applies to LD series dehumidifiers (pump with pressure
gauges and expansion tank would normally be part of the dehumidifier).
Pic. G.3 (A) shows typical piping schematic for single fluid cooler serving single cooling circuit. Piping schematic
for single fluid cooler serving multiple cooling circuits (“double-decker” DS series dehumidifiers etc.) is shown
on Pic. G.3 (B).
o NOTE: the given schematics are example only - the design, provision and installation of actual fluid
cooler piping is not Dectron’s responsibility and is to be done by a third party.

Dectron LD Series Specifications

General

Brand	Dectron
Model	LD Series
Category	Dehumidifier
Language	English