Hale 5.0 FoamLogix - Manual (Page 45)

ΙΙ
-15
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
II
: Installation
For proper installation, the flowsensor
requires the use of a spacer and eight
stainless steel internal hex head screws.
Four 6 – 32 x ½ inch screws attach the
spacer to the saddle clamp mount, and
four 6 – 32 x ¾ inch screws with lockwashers
attach the paddlewheel to the spacer.
Align the spacer to the saddle clamp
mount by arranging the indexing pin of the
saddle clamp with the indexing hole of the
spacer. Use four ½ inch machine screws
without lockwashers to secure the two
pieces. Torque to 8.5 inch pounds.
Align the paddlewheel indexing pin to the
indexing hole in the spacer, secure using
four ¾ inch screws and lockwashers.
Torque to 7.5 inch pounds.
Apply a small amount of grease to the
saddle clamp gasket before the final
installation of the assembly onto the pipe.
Tighten the saddle clamp onto the pipe
firmly.
The paddlewheel should be installed as
close to upright as possible within the range
shown in figure 2-8. Do not let the
flowsensor rotate more than 85 degrees in
Figure 2-10. Flowsensor Placement
WATER
INLET
WATER
INLET
VALVE OR
FITTING AFTER
FLOWSENSOR
VALVE OR FITTING BEFORE
FLOWSENSOR WITH LESS THAN 5X
THE PIPE DIAMETER BETWEEN
AT LEAST 5X THE PIPE
DIAMETER BETWEEN
VALVE OR FITTING AND
FLOWSENSOR
CORRECT
INCORRECT
either direction for proper operation.
FOAM PUMP FLUSH SYSTEM
When dual foam tanks are installed on the
apparatus, flushing water must be provided
to flush the system of foam concentrate
after use of some foam concentrate types
to prevent possible reactions. The Hale ADT
and Hale MDT
II each have provisions for
connecting flushing water to the foam
concentrate injection system.
If a single foam concentrate tank system is
installed on the apparatus the Hale MST
provides a selector valve and gives the
system flush capabilities for NFPA
compliance. A fitting provided on the Hale
MST makes connection of flushing water
simple.
When the Hale FoamLogix is installed with
the "no tank" option the system installer must
provide flushing water supply to comply
with NFPA standards.
Flushing water hose should have a minimum
of ½ inch (12 mm) inside diameter and be
capable of withstanding the maximum fire
pump discharge pressure, 500 PSI (34 BAR)
minimum. The flush water supply should be
provided from one of the pressure taps on
the discharge of the fire pump. It is
recommended that a check valve be
installed at the pressure tap to prevent
contamination. Flush water thread
connections on the ADT are ½ inch NPT and
on the Hale MDT
ΙΙ
and Hale MST they are ¼
inch NPT. The system installer must provide
proper fittings for these connections.
FOAM CONCENTRATE PLUMBING
Foam concentrate plumbing consists of the
foam concentrate suction hose, foam
strainer, foam concentrate discharge hose
and check valve/injector fitting.
CAUTION: Make sure the foam tank and
foam concentrate suction hoses are
clean before making final connection to
foam pump. Flush tank and hoses prior