Quest IQ Dry Cooler OMM
10
September 2020
Fig. 1, 2 and 4 show
NG-V
type dry coolers (two, six and single-fan models, respectively), while Fig. 3
shows
NG-Z
type dry cooler.
Examples show all/most available options (like pump package etc.); some of shown options may not be
present on your dry cooler
–
refer to submittal documentation as needed.
•
Cooling airside
coil(s)
(31) (where heat from glycol mixture is rejected to the ambient air) is mounted onto
metal frame, upstream (before) the
fan(s)
(32), that pulls the air through the coils to absorb the heat.
o
Depending on the equipment type and required capacity, dry cooler may have one or multiple coils
and fans
–
refer to
Views and Options
(
Basic Information
chapter).
•
Dry cooler
piping connections
(33) are identified in respect to cooling media flow direction (hot/warm media
entering the dry cooler
–
IN, cool media leaving the dry cooler
–
OUT);
o
In some cases, dry cooler piping connection(s) may be located within
pump package
box (37), if dry
cooler is provided with one.
o
Piping connection location may vary
–
refer to particular cooler labels, stickers, submittal and other
documentation.
o
Dry cooler manifold/connection, normally, is not equipped with isolating valves, filters etc. (this also
applies to pump package, if dry cooler is equipped with such option; see pump package layout
below).
•
For NG-Z type (Fig. 3) ONLY!
Said dry cooler ships with set of legs (34) to provide sufficient space between
horizontal mounting surface and airflow intake. On-site assembly is required for these legs. For more details
on the installation refer to the
Installation Manual
.
•
Electric power is normally to be brought to
disconnect
(35) (if cooler is equipped with such), which feeds it to
the
electrical box
(36), that contains dry cooler power and control apparatuses.
o
Depending on dry cooler specifics, location of electrical box may slightly differ; in some cases,
electrical box may be incorporated into
pump package
or located on the opposite side of the dry
cooler.
Electrical Box
–
Power and Control
Dry cooler power and control wiring and
apparatuses (transformer, contactor(s), fuses,
wiring terminals etc., as applicable) are located
in the electrical box, shown on Pic. D.2: typical box of dry
cooler type NG-Z (
a
) and type NG-V (
b
):
•
In some cases dry cooler electrical box could be
incorporated within pump package.
•
NG-V type dry cooler with multiple fans would have
multiple boxes (typically
–
one box per one pair of
fans).
o
Multiple electrical boxes on one dry cooler are
normally connected to each other at the
factory, so external power and control wiring
has to be brought only to one (main) electrical box.
•
Depending on the specifics of the dry cooler (size, type of fans, control method etc.), electrical box layout and
components may vary
–
refer to your dry cooler submittal, wiring diagram and other documentation.
Pic. D.2
b
a
