Planning The Installation - Honeywell MV876B1018 F76S User Manual

F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS

PLANNING THE INSTALLATION

The F76S should be sized based on the required flow rate and
the resulting pressure drop across the filter. As a guideline for
most applications, the F76S should be sized to avoid pressure
drops exceeding 3 psi.
EXAMPLE:What size F76S is required to provide a flow
rate of 30 gpm? Reading across Table 1 at
3 psi pressure drop, a 1 in. filter can provide 31
gpm without exceeding 3 psi pressure drop.
10 0
15 0
50
20 0
0
ell
Hon eyw ann
Bra ukm
M16488
Fig. 2a. Ideal F76S installation. A funnel
mounted directly under the backwash
port is the best installation layout.
10 0
15 0
50
20 0
0
eyw ell
Hon ann
Bra ukm
Fig. 2d. Ensure the backwash outlet is
not raised above the F76S. If the
backwash outlet must be raised above
the F76S, increase inlet pressure 5 psi
for every 10 feet that it is raised.
62-3015—4
Fig. 2b. Ensure the inlet pipe is not
downsized. Do not use 1/4 or 3/8 inch
tubing on 1/2 or 3/4 inch models.
M16491
Fig. 2e. Ensure the F76S is not used
with an undersized pump. An
undersized pump may not provide
proper pressure or flow.
Fig. 2. Installation recommendations.
An increased pressure drop across the filter results when
higher velocities are maintained to increase the capacity
through any given size filter. Severe pressure drops will be
encountered as capacity approaches that of the pipe size. To
ensure the backwash cycle operates properly and cleaning
action is not reduced, follow all recommendations in Fig. 2.
Refer to Fig. 2a for an ideal installation.
NOTE: All filter installations are different. The size, type, and
amount of dirt and debris and the flow rate must
always be considered when choosing a screen and
deciding to install multiple F76 Water Filters in parallel.
10 0
15 0
50
20 0
0
ell
eyw
Hon ann
Bra ukm
M16489
oversized pipe on the backwash outlet.
valve to automate the backwash cycle.
10 0
15 0
50
20 0
0
ell
eyw
Hon ann
Bra ukm
M16492
4
10 0
15 0
50
20 0
0
ell
eyw
Hon ann
Bra ukm
M16490
Fig. 2c. Ensure the backwash outlet
pipe is not downsized, long, or
crimped. Instead, install a short
Do not use a low capacity solenoid
100
150
50
200
0
ell
Hon eyw nn
Brau kma
Fig. 2f. Ensure the F76S is not
installed in a bypass across a pump.
M16478