Dectron LD Series Installation Manual

G – Piping Connection
April, 2018 G-8 INM.XX.X.00
 Refrigeration circuits, depending on dehumidifier type, size and number of splits/sections,
could be provided completely empty or partially charged: be aware of refrigerant content in
the circuits and the way circuits were split at the factory.
 Typically, if the dehumidifier is partially charged (normally, LD series):
 Compressor(s) and receiver(s) valves are closed and
 Evaporator coil(s) as well as suction line (up to compressor valve) and pump down
liquid line (up to receiver valve) are empty, rest of circuit(s) contain refrigerant.
Filter-drier core normally is provided separately for installation before vacuuming of
the circuit’s empty section.
 Refrigeration circuit(s) final charge may need to be verified and adjusted (as needed) during
dehumidifier start. For current upcharge adjustment, refer to refrigerant level in receiver
sight glasses: top sight glass float should be at the bottom, bottom – at the top.
 Finalize piping reassembly:
o As needed - retighten pipe braces, reinstall piping insulation (refrigeration circuit suction line(s),
chilled water coils line(s), etc.)
Remote Gas Boiler Package Installation and Piping Connection
Normally, dehumidifiers provided with a gas boiler package are
accompanied with the boiler manual and Remote Boiler Package
Installation and Start Up Instructions – refer as needed.
Venting and Gas connections.
 If package includes two boilers, connect gas and venting to each
boiler separately.
Water piping connections.
Boiler package piping recommendations are similar to ones, outlined in
Fluid Cooler Piping (see above):
 Normally, pipe line size could be kept same as the boiler package
pipe stubs; if line set total equivalent length exceeds 100’ - upsize
to next pipe size.
 Boiler package pipe stubs are labeled respectively (IN and OUT – see
Pic. G.5). Connect boiler package OUT to dehumidifier IN; connect
boiler package IN to dehumidifier OUT.
o ATTENTION! Separate boiler packages are tested at the
factory, using “test loop” – short pipe connecting boiler
package IN and OUT stubs. Such loop is normally removed
at the factory; if this loop is still in place – remove it to
connect pipe line set
 Once piped, pressure test and charge heating system (boiler
package, line set and coil) - refer to the dehumidifier’s main label and submittal documentation for operating
pressure and heating media selection:
o Both, distilled water or water-glycol mixture (approx. ratio is 30-35% of food grade propylene glycol)
are suitable for boiler package – refer to given dehumidifier submittal documentation.
o Recommended static pressure is approx. 40-50 psi
Pic.G.5
Fill/drain
valve
Gas Conn.
IN
OUT
Air bleed
valve

Dectron LD Series Specifications

General

Brand	Dectron
Model	LD Series
Category	Dehumidifier
Language	English