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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 of backwash   
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

Summary of Contents for BRAUKMANN F74C

Page 1: ...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 rin...

Page 2: ... 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 ...

Page 3: ...ing 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 N...

Page 4: ... 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 ...

Page 5: ...se 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 clos...

Page 6: ...nnect 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 unnecessar...

Page 7: ...ances 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 ...

Page 8: ...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 ef...

Page 9: ...V876 AUTOMATIC BACKWASH CONTROLS 9 62 3061 Fig 15 Water flow through the F74C SCREEN BACKWASH IMPELLER a F74C DURING NORMAL FLOW b F74C DURING BACKWASH CYCLE DEBRIS AND SEDIMENT M17710 ENLARGED CROSS SECTION ENLARGED CROSS SECTION ...

Page 10: ...T1022 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 ...

Page 11: ...11 62 3061 ...

Page 12: ...ontrol Home and Building Control Honeywell Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 4Z9 Printed in U S A on recycled paper containing at least 10 post consumer paper fibers ...

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