IV
-13
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
IV
: Operation
3. After completion of Class B foam
operations briefly flush the foam pump and
return the Hale FoamMaster to the ready
condition by returning to the
TANK A
position and flowing a small amount of
Class A foam concentrate.
IMPORTANT:
Make sure the Hale
FoamMaster dual tank system is in the
TANK A
position when apparatus is
placed in ready condition.
FLUSHING HALE FOAMMASTER
When returning the apparatus to ready
condition after foam operations using class
B foam, the Hale FoamMaster foam pump
must be flushed because some Class B
foam concentrates deteriorate rapidly.
NOTE:
Approved class A foam
concentrates do not deteriorate rapidly
like class B foam concentrates. As long
as an approved class A foam
concentrate is used and the system will
be used within 10-12 weeks no flushing
will be required. When class B foam
concentrate is used flush system then
switch to class A as most responses are
usually class A types.
The following procedures shall be used to
flush the foam pump. Refer to figure 4-10
for ADT or MDT
ΙΙ
operating positions and
refer to figure 4-11 for MST operation:
1. Energize apparatus and establish water
flow through a foam capable
discharge. Set fire pump for a low
discharge pressure, 50 to 75 PSI (3.4 to
5.2 BAR).
2. Energize Hale FoamMaster by
depressing the red
ON
button allowing
foam solution to discharge.
NOTE:
When the Hale ADT, MDT
ΙΙ
or MST
is in the
FLUSH
position the Hale
FoamMaster foam injection system will
only run for 20 seconds.
3. Place the Hale ADT, MDT
ΙΙ
or MST to the
FLUSH
position.
4. Observe discharge hose and allow Hale
FoamMaster and discharge to run for
several seconds.
5. After several seconds place the Hale
ADT or MDT
ΙΙ
to the
TANK A
position and
allow Hale FoamMaster to run until foam
solution is discharged through the foam
capable hose line.
NOTE:
When the Hale MST is used for
Class B foam concentrates DO NOT
allow the foam pump to run in the
FOAM
TANK
position after flushing foam pump.
6. Place the Hale MST to the
FOAM TANK
position and allow Hale FoamMaster to
run until Class A foam solution is
discharged through the foam capable
hose line. If Class B foam concentrate is
used shut down Hale FoamMaster
immediately after switching to
FOAM
TANK
position.
7. Shut down Hale FoamMaster allowing
foam capable discharge to run to flush
out the fire pump discharge manifold as
required. Once clear water flows, close
foam capable discharge and shut down
apparatus.
Figure 4-11. Hale MST Operation
SELECTOR
HANDLE
FLUSH
POSITION
FOAM TANK
POSITION
POSITION
INDICATOR
NAMEPLATE
SELECTOR HANDLE IN FOAM TANK POSITION
