5
AccuMax SP
2
A Quick Look at How the System Works
Installation and Operation Manual
The FoamPro AccuMax Single-Point system is an
electronically-controlled, hydraulically-driven, foam
concentrate proportioning system designed to provide
the wide range of foam concentrate injection rates
necessary for both Class A and Class B foam
operations.
The FoamPro system will accurately deliver from 0.1%
to 10.0% foam concentrate to the foam injection point.
The maximum rated concentrate flow rates obtainable
are shown in the system specifications in Section 15.
The FoamPro AccuMax SP system is a flow-based
proportioning system that measures water flow and then
injects the correct proportional amount of foam
concentrate to maintain the desired percentage. The
basic FoamPro system is shown in Figure 2-1. The
flowmeter measures the water flow and sends a signal
to the Digital Display Control Module. Another flowmeter
in the foam discharge line of the foam pump monitors
the foam pump output. Constant comparison of these
two information signals by the computer ensures
maintenance of the desired proportion of foam
concentrate at all times based on water flow rate,
independent of any variations in fire pump intake or
discharge pressures. As water flow increases or
decreases the foam concentrate rate of injection is
increased or decreased automatically to correspond to
water flow, maintaining the proper concentrate
percentage as selected on the Digital Display Control
Module.
Foam concentrate is injected directly into the water
stream on the discharge side of the water pump. It is
then fed as foam solution into a standard fog nozzle, an
air-aspirated nozzle, a straight bore nozzle, or into a
CAFS system, by the main fire pump.
Since the foam is injected on the discharge side of the
fire pump, and check valves are used at installation,
contamination of the booster tank, fire pump, and relief
valve with foam concentrate is eliminated.
Hydraulic power to operate the foam pump is to be
provided by a separate hydraulic pump driven by the
apparatus system. Electrical power to operate the foam
systems is provided by the apparatus electrical system.
Order optional system components listed in Section 3 to
accommodate system design and requirements. The
components listed have been tested with the FoamPro
systems and provide for optimum system performance.
