7
Installation and Operation Manual
MultiFlo
Figure 5. Flowmeter Placement
2. Locate a position on the apparatus operator’s panel
that will accommodate the FoamPro MultiFlo
Control Module. The cutout that will be needed in
the operator panel is a 3
7
⁄
8
" (98 mm) diameter hole
[the same as a 3
1
⁄
2
" (89 mm) pressure gauge].
The display is secured with four #10 socket head
screws in the four holes in the face (see Section 8
for a mounting template). The display requires
5 inches (127 mm) minimum from the back of the
operator panel to clear wires and connectors. Make
sure there is enough clearance behind the
operator’s panel for the cables.
To make sure proper readings are obtained, the
flowmeters require that the amount of water turbulence
in the pipe being monitored is as low as possible.
Excessive turbulence produces unstable and inaccurate
flow readings. The following installation guidelines will
help attain the best readings and maintain the accuracy
of the flowmeters.
A minimum
5 times the pipe diameter
of straight run
pipe without any fittings is necessary upstream of the
flowmeter (see Figure 5).
10 times
is even better - the
longer the straight run, the lower the turbulence. Here
are some examples of required straight run:
Pipe
Recommended
Size
Straight Run Pipe
1
1
⁄
2
" (38 mm)
7
1
⁄
2
to 15" (191 to 381mm)
2" (50 mm)
10 to 20" (254 to 508 mm)
2
1
⁄
2
" (64 mm)
12
1
⁄
2
to 25" (317 to 635mm)
3" (76 mm)
15 to 30" (381 to 762 mm)
The downstream plumbing of the flowmeter is not as
critical, but again, straight runs without fittings help
maintain accurate flow readings.
Do not mount a flowmeter directly after an elbow or
valve (see Figure 5). Valves create severe turbulence
when they are “gated-down.”
Figure 6. MultiFlo Control Module Grounding
NOTE: Make sure the panel where the control
module is mounted has an adequate ground.
For stainless steel and vinyl-coated panels, a
1⁄2" (13 mm) wide flat ground strap must be
attached from one of the four screws, holding
the control module in place, to the frame of the
fire truck to ensure adequate grounding (see
Figure 6).
CAUTION: Before connecting the molded
cables, inspect the yellow seal washer in the
female connector. If the seal washer is missing
or damaged, water can enter the connector and
cause corrosion of the pins and terminals that
will cause system failure.
Operator Panel
Lockwasher
Nut
Digital Display
#10 Screw
Flat Ground Strap
