Honeywell BRAUKMANN F74C Operation manual

PRODUCT DATA
62- 3061
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
Braukmann
F74C Reverse Rinsing Filter;
MV876 Automatic-Backwash Controls
APPLICATION
‘The F74C Reverse Rinsing Water Filters, used at
point-of-entry (POE) to remove sediment and debris from
residential or commercial water systems, ensure a continuous
supply of filtered water. The fine filter prevents the ingress of
foreign bodies, such as rust particles and grains of sand. Both
horizontal and vertical installations are possible. The flow,
filtering capacity and ease of cleaning make the F74C the
ideal filter for the most demanding applications. Both
horizontal and vertical installations are possible.
The MV876 Automatic-Backwash Control is available as an
accessory. This control is fitted to the drain valve and is
programmed by the user to automatically perform the
backwash function according to the desired interval.
FEATURES
F74C
• Built-in backwash impeller provides efficient cleaning
with supply pressures as low as 22 psi.
• Robust backwash mechanism.
• No shut-off or disassembly is required for cleaning.
• During backwash, the F74C continues to supply
filtered water without interruption through a secondary
screen.
• Memory ring indicates when the next manual
backwash is due.
• Bayonet connection enables simple retrofitting of
reverse rinse actuator.
• Can be installed on vertical or horizontal piping.
MV876B
• Bayonet fitting simplifies upgrade to automatic
backwash.
• 16 field-selectable backwash intervals (from every
four minutes to once every three months) eliminate
need for external timer.
• Connections for external control on the MV876 provide
for use in automated systems and differential pressure
control.
• MV876 can be manually activated to initiate backwash.
• Battery(AA) backup to insure completion ofbackwash
cycle in spite of power loss.
F74C
MV876B1018
(Bayonet fitting
for F74C)
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Planning the Installation ................................................... 4
Installation ........................................................................ 5
Wiring ............................................................................... 7
Operation .......................................................................... 8
F74C Replacement Parts List (See Fig. 16). .................... 10

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
62-3061 2
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 [phone]
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
units may not exactly match the listed specifications.
Also, products are tested and calibrated under
closely controlled conditions, and some minor
differences in performance can be expected if those
conditions are changed.
F74C:
Models:
Water filters with 100 micron screens and hose connections.
F74C1015: 3/4 in. sweat and NPT threaded tailpieces.
F74C1023: 1 in. sweat and NPT threaded tailpieces.
Materials of Construction:
Body: Engineered plastic.
Inlet/Outlet Adapter: Bronze.
Sump: Engineered plastic.
Screen: Stainless steel.
Internal Construction: Acetal copolymer.
Seals: NBR.
Ball Valve: Brass with PTFE seals.
Inlet Pressure:
Minimum: 22 psi (with unrestricted backwash discharge).
Maximum: 232 psi.
Medium: Water.
Maximum Operating Temperature:
86°F (30°C).
Pipe Size: 3/4 in. and 1 in.
Mounting Position: For vertical or horizontal
(filter bowl always downwards).
Dimensions: See Fig. 1 and Table 1.
Weight:
3/4 in.: 6 lb (2.7 kg).
1 in.: 7 lb (3.2 kg).
Fig. 1. Dimension drawing of F74C.
Table 1. Dimensions of F74C in in. (mm).
Dimension Connection Size 3/4 1
H 12-13/16 (324) 12-13/16 (324)
h 11-3/16 (285) 11-3/16 (285)
L 6-3/8 (162) 7-1/4 (184)
l 3-9/16 (90) 3-15/16 (100)
D 4-1/8 (105) 4-1/8 (105)
r 1-1/16 (27) 1-1/16 (27)
t 2-5/8 (66) 2-5/8 (66)
T 5-5/16 (150) 5-5/16 (150)
H
r
l
L
D
TM18087
h

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
3 62-3061
Operating Pressure Drop Versus Flow:
See Fig. 2.
Maximum recommended: 3 psi to 7 psi (with clean screen).
Fig. 2. F74C Pressure drop vs. flow.
Connections: Union on inlet and outlet: External NPT
threaded or sweat. Inlet/outlet assembly can be rotated to fit
on vertical or horizontal piping.
Screen Sizes:
Shipped with Device: 100 microns.
MV876 Automatic-Backwash Control:
MV876B1018: Bayonet mounted shaft of 24 Vac motor and
timer replaces ball valve manual control for automatic
backwash at preprogrammed intervals. 24V transformer
not included. For use with F74C and F76S Filters only.
Specifications:
Power: 4 VA.
Current: 170 mA.
Voltage: 24 Vac.
Cycle time: 20 seconds (approximate).
Timer: Variable. See Table 3.
Accessories for F74C:
AF74-1A Replacement filter assembly for F74C, 3/4 in. and
1 in., 100 micron; includes the filter insert complete (O-ring,
mesh with mesh support, impeller), sump O-ring (mounted
between the filter housing and the sump).
KF74-1A Replacement sump assembly for the F74C; includes
the sump assembly complete (ball valve, plastic air gap
adaptor), sump O-ring (mounted between the filter housing
and the sump).
TBD Opaque sump cover for F74C 3/4 in. and 1 in.
U76S5015 3/4 in. sweat tailpiece.
U76S5023 1 in. sweat tailpiece.
U76T1014 3/4 in. NPT tailpiece.
U76T1022 1 in. NPT tailpiece.
901444 Union gasket for F74; 3/4 in., 10 gaskets in package.
Table 2. Flow Capacity of F74C in Gallons per Minute (gpm).
Table 3. MV876B Timer Selections.
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
03 710 20
0.0
PRESSURE DROP (PSI)
FLOW (GPM)
F74C1023
F74C1015
MAXIMUM RECOMMENDED
PRESSURE DROP WITH
CLEAN SCREEN.
M17656
Model Size Pressure Drop in psi Cv1234515
F74C1015 3/4 9.0 12.7 15.6 18.0 20.1 34.9 9
F74C1023 1 10.1 14.3 17.5 20.2 22.6 39.1 10.1
Program Value Backwash Interval
1 4 minutes
2 8 minutes
316minutes
432minutes
5 1 hour
6 2 hours
7 4 hours
8 8 hours
9 17 hours
10 34 hours
11 3 days
12 6 days
13 11 days
14 23 days
15 45 days
16 3 months

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
62-3061 4
PLANNING THE INSTALLATION
The F74C should be sized based on the required flow rate
and the resulting pressure drop across the filter. As a
guideline for most applications, the F74C should be sized for
a pressure drop between 3 psi and 7 psi.
EXAMPLE: What size F74C is required to provide a flow rate
of 20 gpm? Reading Table 2 at 4 psi pressure drop, a 1 in.
filter can provide 20.2 gpm without exceeding 4 psi pressure
drop.
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. 3.
Refer to Fig. 3a 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 F74C Water Filters in
parallel.
Fig. 3. Ideal F74C installation. A funnel
mounted directly under the backwash
port is the best installation layout.
Fig. 4. Make sure the inlet pipe is
not downsized. Do not use 1/4 or
3/8 inch tubing on 3/4 inch filters.
Fig. 5. Make sure the backwash outlet pipe is not
downsized, long or crimped. Instead, install a short
oversized pipe on the backwash outlet. Do not use a low
capacity solenoid valve to automate the backwash cycle.
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.
M17705
M17706
M17707
M17708
M17709
M17704

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
5 62-3061
INSTALLATION
When Installing this product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check ratings given in these instructions and on the
product to make sure the product is suitable for your
application.
3. Make sure the installer is a trained, experienced service
technician.
4. 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.
2. Remove the backwash outlet handle.
3. Install the MV876. See Fig. 9 and 10.
NOTE: 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.
Fig. 9. Installing the MV876.
M16481
MV876B

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

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
7 62-3061
Fig. 11. Removing the MV876 cover.
Fig. 12. Installing batteries in the MV876.
Fig. 13. Replacing the MV876 fuse.
WIRING
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before wiring.
IMPORTANT
All wiring must comply with applicable codes and
ordinances.
MV876
Mount the 24 Vac transformer and wire as shown in Fig. 14.
Reconnect power to the system. When the system is
powered, the MV876 will run through one backwash cycle
(approximately 20 seconds).
Set MV876 backwash interval to the desired setting. See the
Operation section.
Check MV876 operation by interrupting primary power to the
transformer. When power is switched back on, the MV876 will
backwash the F74C once.
Fig. 14. Wiring diagram for F74C with MV876.
MV876B
M17352
M17353
MV876B
M17351
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
M16484
MV876

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
62-3061 8
OPERATION
The F74C Water Filter removes sediment and debris from the
water using an upper and lower screen. During normal
operation, no water passes through the upper screen. Water
is filtered as it flows through the lower screen. See Fig. 15a.
With continued operation, the lower screen becomes
obstructed, reducing efficiency and creating a pressure drop
acrossthe F74C. Backwash the F74C periodically. Suggested
interval is either once a week (residential applications) or
when the pressure gauge measures about five psi lower than
the pressure when initially installed (with similar flow).
To backwash the F74C manually, open the backwash outlet
on the F74C bottom. This forces the entire filter insert
downward. Water flow to the lower screen outer side is
blocked. The upper filter removes sediment and debris from
the water. Some of the water passing through the upper
screen is directed through the impeller to backwash the lower
screen (from inside to outside). Remaining filtered water
meets the needs downstream.
Water jets from the rapidly spinning impeller enhance the
reversed water flow. The reverse flow removes trapped
sediment and debris from the lower filter. This sediment drains
out the backwash outlet. Cleaning the lower screen requires
approximately 20 seconds. See Fig. 15b.
The F74C requires no maintenance, in most applications, if
backwashed at the proper interval.
Determining Backwash Interval
All F74C applications are different and require backwashing at
different intervals. Backwash intervals depend directly on:
—The level and type of sediment in the local water
supply.
—Water usage.
EXAMPLE: In northern states, water usage is higher
in summer months than in winter months due to lawn
watering in the summer. Therefore, the F74C should
be backwashed more often in summer months than in
winter months.
By accurately determining a proper backwash interval, the
F74C will operate at a higher efficiency.
To determine the F74C backwash interval:
1. Backwash the system once to ensure the lower screen
is clean.
2. The pressure gauge needle measures outlet pressure.
With clean screens, inlet pressure should never be
more than 7 psi higher than the outlet pressure.
3. Record the date, time and pressure reading.
4. Monitor the F74C closely. Over time, the screens
become obstructed and the outlet pressure drops.
NOTE: The F74C requires a backwash when the pressure
measuresaboutfive psi lower than the inlet pressure
did when initially installed (at approximately the
same water flow). Installations do vary and can
require a backwash at different times.
5. Record the date, time and pressure again. Residential
applications can require an F74C backwash only once
every few weeks to once per week.
6. Backwash the F74C regularly at the determined
interval. Weekly is recommended for residential
applications. A backwash can be done manually or
automatically:
a. Manual backwash: Open the backwash outlet for
approximately 30 seconds.
NOTE: The amount of time required varies among
installations. However, 30 seconds is the standard
guideline to clean the lower screen.
b. Automatic backwash: Install an M876 Automatic
Backwash Valve and select the backwash interval.
See the Operation section.
NOTE: Backwashing more frequently than actually required
will not harm the system or the filter.

F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
9 62-3061
Fig. 15. Water flow through the F74C.
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SCREEN
BACKWASH
IMPELLER
a. F74C DURING NORMAL FLOW b. F74C DURING BACKWASH CYCLE
DEBRIS AND
SEDIMENT M17710
ENLARGED
CROSS SECTION ENLARGED
CROSS SECTION
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62-3061 10
F74C REPLACEMENT PARTS LIST (SEE FIG. 16).
Table 4. Parts and Accessories for F74C.
Fig. 16. F74C Exploded View. parts are keyed to F74C Replacement parts List.
Part Number Letterin Fig. 16 Description Contents
U76S5051 A 3/4 in. sweat tailpiece Tailpiece
U76S5023 A 1 in. sweat tailpiece Tailpiece
U76T1014 B 3/4 in. NPT tailpiece Tailpiece
U76T1022 B 1 in. NPT tailpiece Tailpiece
901444 C Union gasket, 3/4 in. 10 gaskets in package
901445 C Union gasket, 1 in. 10 gaskets in package
AF74-1A D Replacement filter assembly for
F74C, 3/4 in. and 1 in., 100 micron. Includes the filter insert complete (O-ring, mesh with mesh support, impeller), sump O-ring (mounted between the filter
housing and the sump).
KF74-1A E Replacement sump assembly for
F74C Includes the sump assembly complete (ball valve, plastic air gap adaptor), sump O-ring (mounted between the filter
housing and the sump).
M18212
B
C
B
A
E
D
C
A

11 62-3061

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Home and Building Control Home and Building Control
Honeywell Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
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