STA-RITE S7MD60, S7MD72 Owner's Manual

MODULAR DE FILTERS

O W N E R’ S M A N U A L

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INSTALLATION, OPERATION & PARTS

MODELS

S7MD60 S7MD72

Pentair Water Pool and Spa, Inc.

© 2012 Pentair Water Pool and Spa, Inc. All rights reserved. This document is subject to change without notice.

1620 Hawkins Ave., Sanford, NC 27330  [phone]
10951 West Los Angeles Ave., Moorpark, CA 93021  [phone]

Customer Support: [phone]

Sta-Rite
ated companies in the United States and/or other countries. Unless noted, names and brands of others that may be used in
this document are not used to indicate an affiliation or endorsement between the proprietors of these names and brands and
Pentair Water Pool and Spa, Inc. Those names and brands may be the trademarks or registered trademarks of those parties
or others. Printed in U.S.A.

4/20/12 S596 (Rev. D)

®

and Pentair Water Pool and Spa®are registered trademarks of Pentair Water Pool and Spa, Inc. and/or its affili-

This manual should be furnished to
the end user of this filter; its use will
reduce service calls and chance of
injury and will lengthen filter life.

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MODULAR DE FILTERS

To avoId unneeded service calls, prevent possible injuries, and get the most
out of your filter, READ THIS MANUAL CAREFULLY!

The Sta-Rite System 3 Modular DE Filter:

• Is designed to filter water for swimming pools.

• Is an excellent performer; durable, reliable.

Table of Contents

Safety Instructions....................................................................................3

General Information..................................................................................4

Installation ................................................................................................5

Specifications ...........................................................................................6

Initial Startup.............................................................................................7

Filter Disassembly / Assembly..................................................................8

Cleaning the Filter ....................................................................................9

Filter Backwash Procedure....................................................................9

Module Cleaning Procedure ................................................................10

Special Cleaning Instructions...............................................................11

System Inspection ..................................................................................11

Winterizing .............................................................................................12

Troubleshooting Guide ...........................................................................13

Repair Parts List.....................................................................................14

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READ AND FOLLOW SAFETY IN­STRUCTIONS!

This is the safety alert symbol. When you see this symbol on your filter
or in this manual, look for one of the following signal words and be alert

to the potential for personal injury.

warns about hazards that will cause death, serious personal in-

jury, or major property damage if ignored.

warns about hazards that can cause death, serious personal in-

jury, or major property damage if ignored.

warns about hazards that will or can cause minor personal in-

jury or property damage if ignored.
NOTICE indicates special instructions not related to hazards.
Carefully read and follow all safety instructions in this manual and on equip-

ment. Keep safety labels in good condition; replace if missing or damaged.

Hazardous pressure. Incorrectly installed or tested equipment
may fail, causing severe injury or property damage. Read and follow instruc­tions in owner's manual when installing and operating equipment. Have a
trained pool professional perform all pressure tests.

1. Do not connect system to a high pressure or city water system.

2. Use equipment only in a pool or spa installation.

3. Trapped air in system can cause explosion. BE SURE all air is out of sys-

tem before operating or testing equipment.

4. DO NOT pressure test with compressed air!

Before pressure testing, make the following safety checks:

• Check all clamps, bolts, lids, and system accessories before testing.

• Release all air in system before testing.

• Tighten Sta-Rite trap lids to 30 ft. lbs. (4.1 kg-cm) torque for testing.

• Water pressure for test must be less than 25 PSI (172 kPa).

• Water Temperature for test must be less than 100

• Limit test to 24 hours. After test, visually check system to be sure it is

ready for operation. Remove trap lid and retighten hand tight only.
NOTICE: These parameters apply to Sta-Rite equipment only. For

non-Sta-Rite equipment, consult equipment manufacturer.

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F. ( 3 8oC).

BEFORE WORKING

ON FILTER:

If filter clamps are
adjusted or removed
under pressure,
tank may explode,
causing severe injury or
major property damage.

1. Stop pump.

2. Open air release
valve.

3. Release all pressure
from system.

BEFORE WORKING

ON PUMP OR MOTOR

Filter pumps require
hazardous voltage
which can shock, burn,
or cause death.

Disconnect power
to motor at main
circuit breaker.
Discharge motor
capacitor to ground.

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Hazardous pressure.
Can cause severe
injury or major
property damage
from tank blow up.

Release all pressure
and read instructions
before working on filter.

GENERAL INFORMATION

• Clean a new pool as well as possible before filling pool and operating fil­ter. Excess dirt and large particles of foreign matter in the system can
cause serious damage to the filter and pump.

• With a diatomaceous earth (DE) filter system in place and operating cor­rectly, clean water is returned to the pool faster than pool water is being
contaminated. A typical pool installation will require approximately one
week to obtain and maintain the sparkle that your filter is capable of giving
you.

• DO NOT use more than the recommended amount of DE in your filter. To
do so can cause a buildup of DE and "bridging" between the elements
which will plug the filter.

If filter is improperly disassembled or assembled, it can explode under
pressure! To avoid danger of severe injury or major property damage,

always follow service instructions in this manual when working on filter!

NEVER operate this filter system at more than 50 pounds per square

inch (50 PSI/345kPa) pressure! Be sure filter pressure gauge operates
when system is operating. If pressure gauge is damaged or does not work,
replace it.

Purge all air from system before operating system. NEVER operate fil-

ter

with air trapped inside.

• On a new pool installation, we recommend:

1. Disassemble the filter after the initial cleanup.

To prevent severe injury or major property damage, exactly follow

“Filter

Disassembly/Assembly Procedure” on Page 8.

2. Remove and hose down the module to remove contaminants.

• It is a good idea to remove the module once a year and soak it in a filter

cleaning solution to remove accumulated body oils, etc.; see Page 11,
“Special Cleaning Instructions”.

• Cleaning interval is based on pressure differential, not on length of time fil-

ter is operated. Different water conditions will have different normal clean­ing intervals. If backwashing filter is not possible, use “Module Cleaning
Procedure”, Page 10, at regular intervals to clean filter.

• Check local codes for restrictions on backwash to waste piping, separation

tank requirements and spent D.E. disposal requirements.

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INSTALLATION

Installation of filter should only be done by qualified, licensed personnel.

Filter mount must:

 Provide weather and freezing protection.
 Provide space and lighting for easy access for routine maintenance. (See

Figure 1 and Table II, Page 6, for space requirements.)

 Be on a reasonably level surface and provide adequate drainage.

 Be as close to pool as possible to reduce line loss from pipe friction.

Piping:

 Piping must conform to local/state plumbing and sanitary codes.

Use thread seal tape or equivilant on all male connections of plastic pipe

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and fittings. DO NOT use pipe compounds on plastic pipe; it will cause the
pipe to crack. Do not use sealant on unions—assemble them dry and hand
tight.

 Support pipe independently to prevent strains on filter or valve.
 Use 2" (51mm) pipe to reduce pressure losses as much as possible.

NOTICE: Filter may be located away from pool, but for adequate flow
larger pipe may be needed. Check local codes for remote installation.

 Fittings restrict flow; for best efficiency use fewest possible fittings.
 Keep piping tight and free of leaks: pump suction line leaks may cause

trapped air in filter tank or loss of prime at pump; pump discharge line
leaks may show up as dampness or jets of water.



NOTICE: Overtightening can crack filter ports.

TABLE I - Sta-Rite valves for
use with Model S7MD60 and
S7MD72 filters

Port Part
Size Number

2"

2"

NOTICE: Use of
valves other than
those listed above
could cause
reversed water flow
through filters and
damage to internal
filter components.

Multi-port
18201-0300

Plastic Slide
263053

Valves:

 A check valve installed ahead of filter inlet will prevent contaminants from

draining back into pool.

 A check valve installed between filter and heater will prevent hot water

from backing up into filter and deforming internal components.

 For installation allowing backwashing, install Sta-Rite Two Position Slide

Valve or Multiport Selector Valve with filter. See Table I. If you intend to
clean your filter according to “Module Cleaning Procedure”, Page 10, no
slide or multi-port valve is required. See Figures 1 and 2, Page 6, for cor­rect water flow when connecting pipe.

 Filter ports and valve ports are furnished with union connections.

DO NOT use pipe sealants on union collar (nut).

 Use care before assembly not to damage union sealing surfaces or O-

Ring.

 To allow recirculation during precoat (if precoat pot is used), install a recir-

culation line with shut-off between pad return line and pump suction.

Electrical

 All wiring, grounding and bonding of associated equipment must meet

local and/or National Electrical Code standards.

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