Advertisement
F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
Fig. 6. Make sure the backwash outlet is not raised
above the F74C. If the backwash outlet must be
raised above the F74C, increase the inlet pressure
5 psi for every 10 feet that it is raised.
Fig. 7. Make sure the F74C is not used with
an undersized pump. An undersized pump
may not provide proper pressure or flow.
Fig. 8. Make sure the F74C is not installed
in a bypass across a pump.
INSTALLATION
When Installing this product...
Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
62-0165
M17708
M17709
M17704
Check ratings given in these instructions and on the
product to make sure the product is suitable for your
application.
Make sure the installer is a trained, experienced service
technician.
Use these instructions to check out product operation
after installation.
CAUTION
Equipment Damage Hazard.
Excessive pressure or temperature can
damage the device.
Make sure water temperature and pressure are
below maximum ratings specified.
CAUTION
Equipment Damage Hazard.
Excessive heat can damage internal parts.
Before sweat soldering, separate the tailpieces
and nuts from the inlet/outlet adapter.
F74C Installation.
When installing an F74C, use the following procedure:
1. Shut off water supply by closing the water supply
valve.
2. Install inlet/outlet adapter so that filter is vertical.
3. Install the F74C in the water line with the arrow
pointing in the direction of water flow.
IMPORTANT
When using an MV876, stop here and install the
MV876.
4. Open a downstream tap.
5. Slowly open the water supply valve.
6. Once the F74C sump fills with water, close the
downstream tap and fully open the water supply
valve.
MV876 Installation
1. Open the backwash outlet ball valve.
Remove the backwash outlet handle.
2. Install the MV876. See Fig. 9 and 10.
3. When you rotate the MV876 on installation, it
closes the backwash outlet ball valve.
4. Connect the MV876 to a 24 Vac power supply.
See fig. 14.
5. Open a downstream tap.
6. Slowly open the water supply valve.
7. Once the F74C sump fills with water, close the
downstream tap and fully open the water supply
valve.
8. Program the desired backwash interval by pushing
the program button until the desired interval
number appears in the display.
4
Advertisement
