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MV876B Automatic-Backwash Controls
F76S
APPLICATION
The F76S is a high flow capacity water filter used at point-of-
entry (POE) to remove sediment and debris from residential or
commercial water systems. Used as a prefilter, the F76S
protects elements of the water system, including specialized
treatment devices such as taste/odor or reverse osmosis
(R/O) or other common fixtures and appliances. The flow,
filtering capacity, and ease of cleaning make the F76S the
ideal filter for the most demanding applications.
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 back-
wash function according to the desired interval.
® U.S. Registered Trademark
Copyright © 1999 Honeywell Inc. • All Rights Reserved
F76S Water Filters and
FEATURES
F76
• Built-in backwash impeller provides efficient cleaning
• Increased flow capacity on 1/2 in. to 1-1/4 in. models
• Robust backwash mechanism.
MV876B1018
• No shut-off or disassembly is required for cleaning.
(Bayonet fitting
• During backwash, the F76S continues to supply
for F76S)
• Memory ring indicates when the next manual
MV876
• MV876B1018 bayonet fitting simplifies upgrade to
• 16 field-selectable backwash intervals (from every four
• Connections for external control on the MV876B
MV876B1000
(for F76A,G)
• MV876B can be turned manually to initiate backwash.
• Battery (AA) backup to insure completion of backwash
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Planning the Installation ...................................................
Installation ........................................................................
Wiring ...............................................................................
Operation ..........................................................................
F76S Replacement Parts List ........................................... 10
F76A,G Replacement Parts List ....................................... 12
with supply pressures as low as 22 psi.
provides lower pressure drop.
filtered water without interruption through a secondary
screen.
backwash is due.
automatic backwash.
minutes to once every three months) on the MV876B
eliminate need for external timer.
provide for use in automated systems and differential
pressure control.
cycle in spite of power loss.
PRODUCT DATA
Contents
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Table of Contents
Related Manuals for Honeywell MV876B1018 F76S
Summary of Contents for Honeywell MV876B1018 F76S
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Page 1: Table Of Contents
® U.S. Registered Trademark Copyright © 1999 Honeywell Inc. • All Rights Reserved F76S Water Filters and FEATURES • Built-in backwash impeller provides efficient cleaning with supply pressures as low as 22 psi. -
Page 2: Specifications
Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 (612) 951-1000 In Canada—Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, Ontario M2H 3N7. 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. - Page 3 M76K-400 Pressure Gauge, 400 psi maximum. U76S5007 Sweat Tailpiece for any 1/2 in. F76. U76S5015 Sweat Tailpiece for any 3/4 in. F76. U76S5023 Sweat Tailpiece for any 1 in. F76. Honeywell Braukmann Table 1. Capacity in Gallons Per Minute (gpm). Pipe Size (in.)
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Page 4: Planning The Installation
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. -
Page 5: Installation
Commercial and Industrial Installations (1-1/2 and 2 in. models) Commercial and industrial installations have high flow requirements. For proper operation, limit flow across the F76S screen. For example, a two-inch pipe may have a 120 gpm flow at 12 fps linear velocity across a clean screen. High linear velocity impacts dirt deeply into the screen, making it difficult to backwash and causing the screen to plug up quickly. - Page 6 F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS Fig. 6. Final position of MV876 and F76S components. Installation on an F76A 1. Close the water supply valve to shut off water supply. 2. Drain all water from the F76A by opening both a fixture downstream, and the backwash outlet;...
- Page 7 As the F76S operates, screens become plugged. Backwash the F76S when the black needle measures about five psi lower than the red needle. However, each installation is different. Residential applications can require backwash only once a week, or once every few weeks. Industrial applications can require backwash several times a day.
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Page 8: Wiring
F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS WIRING CAUTION Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry. Disconnect power supply before installation. IMPORTANT All wiring must comply with applicable codes and ordinances. MV876 1. Mount the AT140A1034 Transformer and wire as shown in Fig. - Page 9 a. F76S DURING NORMAL FLOW ENLARGED CROSS SECTION Fig. 12. Water flow through the F76S. F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS b. F76S DURING BACKWASH CYCLE SCREEN BACKWASH IMPELLER CROSS SECTION ENLARGED DEBRIS AND SEDIMENT M17362 62-3015—4...
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Page 10: F76S Replacement Parts List
F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS F76S REPLACEMENT PARTS LIST (SEE FIG. 13) PARTS AND ACCESSORIES FOR NEW STYLE F76S FILTERS: Description (A) Pressure Gauge (new style F76S only) Standard Pressure (230 psi) High Pressure (400 psi) (B) Tailpieces (same for new and old style) Sweat Threaded (shown) (C) Union Nuts... - Page 11 1 0 0 1 5 0 2 0 0 e ll e y w H o n k m a B ra u Fig. 13. F76S exploded view. Parts are keyed to F76S Replacement Parts List. F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS M18073 62-3015—4...
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Page 12: F76A,G Replacement Parts List
F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS F76A,G REPLACEMENT PARTS LIST (SEE FIG. 14) Description (A) Pressure Gauge F76A & F76B F76G & F76H (B) Tailpieces (for new and old style) Sweat Threaded (shown) (C) Union Nuts (D) Tailpiece Gaskets (E) Ring (plastic) Screen Kit 20 Micron... - Page 13 F76S WATER FILTERS AND MV876B AUTOMATIC-BACKWASH CONTROLS 1 0 0 1 5 0 2 0 0 e ll e y w H o n k m a B ra u M746 Fig. 14. F76A,G exploded view. Parts are keyed to F76A,G Replacement Parts List. 62-3015—4...
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- Page 16 Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524 62-3015—4 B.B. Rev. 10-99 Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.