ΙΙ
-4
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
ΙΙ
ΙΙΙΙ
ΙΙ
ΙΙ
: Installation
The foam pump and motor assembly should
be mounted below the discharge of the
foam tank(s) to provide for gravity feed to
the foam pump. The foam tank(s) must be
located where refilling can be easily done
with 5 gallon (19 liter) pails and other
methods suitable to the end user. Most
water tank manufacturers will build foam
tanks into the booster tank. When
specifying foam tank(s) make sure
provisions are made for installation of the
low tank level sensor as well as foam suction
connections, tank drainage and proper fill
openings per NFPA requirements.
FOAM CONCENTRATE STRAINER:
Determine
a location on the apparatus to mount the
foam strainer.
CAUTION:
The in-line strainer/valve
assembly is a low pressure device and
WILL NOT withstand flushing water
pressure. When installing the in-line
strainer in systems equipped with Hale
MDT
ΙΙ
or Hale MST make sure the in-line
strainer/valve assembly is in the hose on
the inlet side of the valve. If the strainer
will be subject to flushing water pressure,
use Hale FS series strainers.
Mount the in-line foam strainer/valve
assembly in the foam concentrate hose
from the foam tank to the foam pump
suction connection, ADT, MDT
ΙΙ
or MST.
When determining the strainer location
keep in mind the requirement for gravity
feed of foam concentrate to the foam
pump through the strainer and avoid air
traps in the hoses. Also, clearance must be
provided to allow removal of the bowl
assembly for cleaning the stainless steel
mesh, to make hose connections to the
strainer and for operation of the service
valve.
If panel mounted FS series strainers are
installed mount the strainer in the foam
concentrate hose that supplies
concentrate to the ADT, MDT
ΙΙ
or MST. The
FS series strainer may also be mounted in
the outlet hose of the MDT
ΙΙ
or MST. When
determining strainer location on the
operator panel keep in mind the
requirement for gravity feed of foam
concentrate to the foam pump through the
strainer and avoid air traps in the hoses.
Clearance must be provided behind the
panel to allow for hose connections to the
strainer. The installer must provide a strainer
service isolation valve in the foam
concentrate hose to prevent spillage during
service. An MST or MDT
ΙΙ
can serve this
purpose also.
CONTROL UNIT and INSTRUCTION/SYSTEM
DIAGRAM PLACARD:
Determine a location
on the operator panel of the apparatus for
the control unit and instruction/system
diagram placard. These components must
be located at the main pump operator
position in close proximity to each other.
Consideration must be given for routing the
control cable from the control unit to the
distribution box on the foam pump and
motor assembly. If necessary, order longer
or shorter cable assemblies to suit the
location demands.
