PoolPak Dry Cooler OMM 4September 2020
Basic Information
View and Options
The views of standard NG series dry coolers are shown on
Pic.C.1. and C.2 below.
Dry cooler Options
•Capacity. NG series dry coolers range broadly in their
capacities, which depends on factors including physical
size, fluid flow rate, glycol concentration and ambient
conditions. See submittal for specific capacity of your
equipment.
•Coils and Fans - single and multi fan and coil combo.
oPic. C.1 shows single fan dry coolers: NG-Z, NG-
V-01 and -02 are “single fan – single coil” type,
NG-V-11 is “single fan – two coil” cooler.
oExcept for NG-V-31 (Pic.C.2 - a), all the multi-
fan coolers (see Pic.C.2) are comprised of
number (up to six) of NG-V-12 (Pic.C.2 –b)
coolers (mounted on the same frame, piped,
wired and operating as one single unit).
oCooler capacity and number of fans are
reflected in its type/nomenclature: Pic. C.2-c
shows NG-V-62 cooler, comprised of six “two
fans –two coils” NG-V-12 sections.
•Fan type. NG series dry coolers have EC motor fans,
varying speed via 0-10vdc signal. Legacy models pre-
2020 may have been equipped with two-speed fans. See
submittal and wiring diagram.
Cooling media. Typically, water-glycol (rust inhibitor-infused
food-grade propylene glycol is used) mixture is used as
cooling media, with recommended concentration of 35% to
prevent pipe bursting. However higher or lower
concentrations could be used. Refer to dry cooler main label
for details on glycol type, ratio etc.
Attention: Glycol Concentration
NOTE. Equipment capacity is typically rated for
35% prop. glycol concentration in water mixture,
however dry coolers may be sold for different
specified concentrations. Be careful when
changing glycol concentration in the field as the
pump may become improperly sized as a result
of different required fluid flow rate. Contact the
factory for more information.
