Installation and Maintenance Manual form 185
Page 9
OPTION:
For ease of installation and maintenance,
pipe to the side of the cofferdams. (see Figure
16)
FIG.16 Pipe to side of cofferdam
3.2
Z OPTION™ INSTALLATIONS
3.2.1
The Z OPTION GRIDCOOLER Keel Cooler replaces
the standard through-hull nozzle mounting/
connecting means with a copper-nickel flange,
fused to the header. This flange utilizes a plurality of
stainless-steel mounting studs locked in place by set
screws to allow replacement in the event of damage.
3.2.2
The unit is also supplied with mating ASTM steel
flanges and flange mounting hardware. The supplied
hardware illustrated in Figure 17 includes nylon
shoulder washers combined with neoprene gaskets
to allow isolation from the vessel’s hull. Special extra
heavy lock nuts and washers are provided for a
secure installation.
3.2.3
Flange mounting hardware can be found in a
cardboard box inside the unit shipping box.
3.2.4
The mating steel flange is welded to a pipe stub
extending from the hull of the vessel. This pipe stub
must be long enough to allow access to the flange
lock nuts for tightening. Alignment of the flanges
on the hull is critical. We suggest that a template be
made of the cooler to aid with the proper alignment
of the flanges.
NOTE:
Temporarily remove nylon shoulder washers
while welding. Re-insert prior to mounting
cooler
The torque specification for the flange nuts is as follows:
NOTE:
Z OPTION units utilize our L OPTION™ support
plates for intermediate mounting of the cooler.
See the next section for L OPTION mounting
instructions.
FLANGE NUT TORQUE SPECIFICATIONS
5/8” diameter or
larger stud
35 - 40 FT. LBS.
1/2” diameter stud
20 - 25 FT. LBS.
FIG.17 Z OPTION mounting detail
