Honeywell BRAUKMANN F74C - Manual (Page 6)

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
62-3061 6
Fig. 10. Final position of MV876 and F74C.
As the F74C operates, screens become plugged. Backwash
the F74C when the pressure gauge measures about five psi
lower than when first installed. However, each installation is
different. Residential applications can require backwash only
once a week, or once every few weeks.
NOTE: For residential applications, backwashing the F74C
once a week, regardless of need, is an excellent
guideline to follow to ensure F74C peak operating
efficiency.
Fitting Batteries and Fuses
The batteries (not included) provide power to the MV876 in
the event of a power loss. This is desirable, especially when
power loss occurs during the reverse rinsing cycle. to provide
this, the MV876 requires four AA alkaline batteries. Install
these batteries in the cover of the MV876 as follows:
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installing the
batteries or fuses.
1. Unscrew the four housing screws and set them aside.
See Figure 11.
IMPORTANT
Make sure the connecting cable is protected from damage
when the MV876 cover is removed.
2. Remove the MV876 cover. See Fig. 11.
3. Insert four AA alkaline batteries. See Fig. 12.
4. Replace the cover.
5. Replace and tighten the four housing screws.
NOTE:
1. To avoid unnecessary battery drainage, connect
the MV876 to power as soon as possible after
inserting new batteries.
2. To ensure the availability of battery power, replace
the batteries after a power loss.
If the 800 mA fuse blows, replace it as follows:
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installing the
batteries or fuses.
1. Unscrew the four housing screws and set them aside
(see Fig. 11).
IMPORTANT
make sure that the connecting cable is protected
from damage while the MV876 cover is removed.
2. Remove the MV876 cover.
3. Remove and discard the old fuse (see Fig. 13).
4. Insert a new 800 mA fuse.
5. Replace the cover.
6. Replace and tighten the four housing screws.
7. Reconnect the power supply.
M16483
MV876B