IV
-14
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
IV
: Operation
PRIMING THE FOAM PUMP WHEN FOAM
TANK HAS RUN DRY
In some instances the foam tank may run
dry while operating the Hale FoamMaster
system. The foam pump is designed to
pump liquid. When the fire pump is running
the foam pump may not pump efficiently
against 100 to 150 PSI (7 to 10 BAR) back
pressure. To re-establish foam concentrate
flow quickly the following procedure can be
used.
1. Turn the bypass valve to the
BYPASS
position.
2. With the fire pump flowing water
from foam discharge and the Hale
FoamMaster on observe the hose from
the bypass valve.
3. When foam concentrate flows from
the hose turn the bypass valve back to
the INJECT position. The pump is now
primed and ready for normal operation.
8. Perform required maintenance checks
on the Hale FoamMaster and apparatus
to return the apparatus to ready
condition.
IMPORTANT:
Make sure the Hale ADT or
MDT
ΙΙ
is in the
TANK A
position and the
Hale MST is in the
FOAM TANK
position
when apparatus is placed in ready
condition.
OPERATION WITH REMOTE ON/OFF
SWITCH
The remote ON/OFF switch is used to
activate the Hale FoamMaster system from
the driver compartment or a location other
than the control unit. The switch will only
activate and deactivate the Hale
FoamMaster system, it does not permit
adjustment of the injection rate. Use the
remote ON/OFF switch as follows:
1. Press the switch down and release to
activate. The LED will light indicating the
Hale FoamMaster is in the standby
position.
2. When the foam capable discharge
nozzle is opened the LED will blink
indicating foam concentrate is being
injected. When the nozzle is closed the
LED will stop flashing.
3. Pressing the switch again will
deactivate the Hale FoamMaster system
and the LED will go out.