Pentair THS Series User manual

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THS SERIES®FILTER
INSTALLATION AND
USER’S GUIDE
DIAPHRAGM VALVE STYLE FACE PIPING

Diaphragm Valve Face Piping Kit Installation Manual Pg. 1 of 52
5/31/12 Rev. F
TABLE OF CONTENTS
1Principals of Operation……………………………………..2
1.1 Diaphragm Valve Operation 2
1.2 Single Tank Normal Operation 2
1.3 Single Tank During Backwash 3
1.4 Dual Tank Normal Filtration 3
1.5 Dual Tank During Backwash 3
2Face piping installation…………………………………….3
2.1 Single Tank Face Piping Installation (THS 3461) 4
2.2 Single Tank Face Piping Installation
(THS 3484, THS4272, THS4284 and THS 4296) 9
2.3 Dual Tank Face Piping Installation (THS 3461) 12
2.4 Dual Tank Face Piping Installation
(THS 3484, THS4272, THS 4284 and THS 4296) 15
3Backwash Controller Installation……………………….19
3.1 Semi-automatic Controller (CM200) - Single Tank Installation 19
3.2 Semi-Automatic Controller (CM200) – Dual Tank Installation 24
3.3 Automatic Controller (CA100) - Single Tank Installation 27
3.4 Automatic Controller (CA100) – Dual Tank Installation 31
3.5 Backwash Controller (CS400) - Single Tank Installation 35
3.6 Backwash Controller (CS400) - Dual Tank Installation 39
3.7 Operation (Semi-Automatic Controller) 43
4APPENDIX…………………………………………………...47
APPENDIX A 48
APPENDIX B 49
APPENDIX C 50
APPENDIX D 51

Diaphragm Valve Face Piping Kit Installation Manual Pg. 2 of 52
5/31/12 Rev. F
This manual covers installation and operating instructions for the optional diaphragm valve style
face piping kits for use with the THS SERIES®FILTER VESSEL.
This manual contains critical safety information that must be furnished to the end user. Failure to
read and follow the instructions could result in serious personal injury and/or major property
damage.
Thank you for purchasing the diaphragm valve style face piping kit for your THS SERIES FILTER
VESSEL. They include features such as pneumatically actuated diaphragm valves, semi-automatic
or automatic backwash controller options, and pre-glued construction for ease of assembly.
This manual covers the installation of face piping for both one and two tank filter systems,
as well as installation of the semi-automatic and automatic controllers for the same. This manual
also covers operation of the semi-automatic controller, as well as a trouble-shooting guide to assist
with any problems which may occur during installation and operation. If you should have any
questions pertaining to the filter tank itself, please refer to the separate manual provided for the
tanks.
Please remember to use proper safety equipment and techniques when installing this
filtration system.
1 Principals of Operation
This section will familiarize you with how the face piping kit and valves work in order to
provide a means of backwashing the filter. It will cover how the diaphragm valves operate, the flow
of water in a single tank system in normal filtration and backwash modes, and a dual tank system in
normal filtration and backwash modes. Please note that the diagrams are for reference only,
and may not be representative of the actual face piping kit.
1.1 Diaphragm Valve Operation
During normal operation water enters one side of
the valve and exits the other. A shaft, which is
attached to a diaphragm at one end, and a throttling
cone and seal at the other, prevents water from
flowing out of the sideport. When the valve is
actuated, water is pumped into the top of the valve
from the controller. This water and pressure causes
the diaphragm to collapse onto the sealing surface
of the valve body. This moves the cone portion of
the shaft allowing water to exit out of the sideport,
while sealing off flow from the influent side of the
valve.
1.2 Single Tank Normal Operation
During normal filtration mode, water is
passed through the influent piping and
into the tank. Water is then passed
through the sand, which is what actually
filters the water. It is then passed
through the collection laterals at the
bottom of the tank. It then passes out
of the effluent pipe and continues on
through the rest of the filtration system.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 3 of 52
5/31/12 Rev. F
1.3 Single Tank During Backwash
During backwash mode, both of the
diaphragm valves are actuated. Since
water cannot enter the tank through
the influent piping, it enters through the
effluent piping. The water is pushed
up through the sand bed, which is
called “Fluidizing” the sand bed. This
loosens dirt and debris trapped by the
sand. This debris is then passed
through the influent piping and exits
through a waste pipe connected to the
valve.
1.4 Dual Tank Normal Filtration
During normal filtration in a dual tank
system, water is split between the two
tanks. It passes through the influent
piping and then through the sand beds.
It is then passed through the collection
laterals at the bottom of the tanks and
passed out of the effluent piping and
returned to the pool.
1.5 Dual Tank During Backwash
During backwash mode in a dual tank
system, one of the three way valves and
the two-way valve are actuated
simultaneously. This allows water to pass
through one of the filters as if it were
filtering normally. When the water exits
that tank, it is forced to enter the second
tank through the effluent pipe. This water
then backwashes the second tank. The
dirt and debris is then passed through the
influent pipe of tank two and out of a waste
pipe connected to the valve.
2 Face piping installation

Diaphragm Valve Face Piping Kit Installation Manual Pg. 4 of 52
5/31/12 Rev. F
IMPORTANT: Installation of the face piping should occur after the filter vessels have been
positioned in their permanent location. Please refer to the Tank Owner’s/Operator’s Manual
section on locating the filter vessels. For dual tank systems, it is very important that the “C-
C” dimension listed in Figure 1 on page 5 of that manual is followed. Please refer to the
Tank Owner/Operators Manual for more information.
Diaphragm valve style face piping kits come in either one or two tank kits. All piping is pre-
glued, which means the only connections that need to be made are flanged connections (with the
exception of THS3461 tanks which are 4” grooved connections) between mating sections. Please
refer to the appropriate drawings in the Appendix section at the end of this manual for aid in
assembly.
IMPORTANT: When tightening flange bolts, it is important to follow a diametrically opposed
pattern. This will ensure that a proper seal between the flanges is obtained. Refer to Figure
1 below for proper tightening sequence. Torque all Metallic type bolts to a maximum of 25
ft-lbs / Non Metallic to a maximum of 15 ft-lbs/Non Metallic. Also, it may be beneficial to
apply a lubricant to each bolt or nut to help relieve stress due to friction.
Prior to Installation see “Grooved Coupling Assembly Instruction” found on page 6.
2.1 Single Tank Face Piping Installation – THS 3461 (4” Grooved
Connections)
The single tank face piping kit consists of:
(1) V3-04A, 4” 3-way diaphragm valve
without Flanges
(1) V3-04B, 4” 3-way diaphragm valve
with Flange, Thru port only.
(1) Tee Assembly
(1) Waste pipe extension
(1) Backwash extension
(1) Sightglass assembly (not shown)
(7) 4” Grooved Coupling Assembly
(3) 4” Flange gaskets
(24) 4” ¾-10 x 3 1/2” Zinc Plated Bolts
(48) Flat Washer, Zinc Plated
(24) Lock Washer, Zinc Plated
(24) Hex Nut, ¾-10, Zinc Plated
(1) Semi-automatic backwash controller
(See Controller Installation Section)
Verify that all parts listed above were supplied before beginning installation. Replacement parts
can be ordered through your local distributor.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 5 of 52
5/31/12 Rev. F
Grooved Coupling Assembly Instruction
1) Seat rubber gasket over end of pipe 1, making sure that the gasket does not cover the groove
cut in the pipe.
2) Insert end of pipe 2 into rubber gasket, again making sure that the gasket does not cover the
groove in the pipe.
3) Fit coupling halves over rubber gasket making sure that coupling halves are seated into the
grooves of the (2) pipes. Make sure one coupling half has standard thru bolt holes and the
other has hexagonal counter-bored thru bolt holes.
Apply an anti-seize lubricant to the threads of the coupling bolts. Insert bolts into the holes in the
coupling, making sure that the bolt heads fit inside the hexagonal counter-bored holes on one side
of the coupling. Place one washer and nut on each bolt and tighten.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 6 of 52
5/31/12 Rev. F
STEP 1: 4” Valve Installation
Place a gasket of grooved coupling
assembly on the influent and effluent tank
grooved pipe connections. Place valve (V3-
04A) with no flanges on influent grooved
pipe connection, install groove coupling
assembly (Refer to page 5). Place valve
(V3-04B) with flange on thru port on effluent
grooved pipe connection, install groove
coupling assembly. See picture at right for
proper orientation. Snug the nuts to “hand
tight”, but do not fully tighten. This will allow
for adjustments during the remainder of the
installation. Please note the orientation of
the valves. The arrows on the valve
covers should be pointing toward the
tank.
STEP 2: Tee Assembly Installation
Place gasket of grooved coupling assembly on top
grooved connection of the influent valve. Install the
Tee assembly on the top of the influent valve, and
orient it as shown in picture, install groove coupling
assembly. Snug the nuts to “hand tight”, but do not
fully tighten.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 7 of 52
5/31/12 Rev. F
STEP 3: Backwash Extension Installation
Place gasket of grooved coupling assembly on grooved
connection of the Tee assembly along with the effluent
valve. Install the backwash extension on to the system
as shown in picture. It may be necessary to turn the
valves or tee assembly slightly to ensure a proper fit.
Install groove coupling assembly. Snug the nuts to “hand
tight”, but do not fully tighten.
STEP 4: Waste Extension Installation
Place gasket of grooved coupling assembly on grooved
connection of influent valve. Install the waste extension
on to the system as shown in picture. Install groove
coupling assembly. Snug the nuts to “hand tight”, but do
not fully tighten.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 8 of 52
5/31/12 Rev. F
STEP 5: Sightglass Installation
Assemble the sightglass by threading the glass
portion into the threaded saddle on the spool. Be
sure to use pipe thread sealant tape on the threads.
Place gasket of grooved coupling assembly on to the
waste extension Install the sightglass assembly on to
the waste flange. Orient the glass portion so it will be
visible during operation. Install groove coupling
assembly. Snug the nuts to “hand tight”, but do not
fully tighten.
STEP 6: Final Adjustments
Once all piping is in place make any necessary adjustments and fully tighten all flange bolts.
Be sure to follow the bolt tightening pattern explained at the beginning of Section 2.0. Tighten
all Metallic type bolts to a maximum of 25 ft-lbs / Non Metallic to a maximum of 15 ft-
lbs / Non Metallic.
Note: All piping should be fully supported with adequate bracing and hangers
to prevent damage from weight and vibration.
STEP 7: Backwash Controller Installation
If a semi-automatic backwash controller was purchased, please refer to Section 3.1 of this
manual. If an automatic backwash controller was purchased, please refer to Section 3.3.
NOTE: There will be extra gaskets and isoplast hardware. This is to join the remaining
flanged connections of the filter system to any existing or new plumbing.

Diaphragm Valve Face Piping Kit Installation Manual Pg. 9 of 52
5/31/12 Rev. F
2.2 Single Tank Face Piping Installation – THS 3484, THS4272, THS4284 and
THS 4296 (6” Flange Connections)
The single tank face piping kit consists of:
(2) 6” 3-way diaphragm valves
(1) Waste pipe extension
(2) Backwash extension
(1) Sightglass assembly (not shown)
(3) 6” Flange
gaskets
(80) Isoplast bolts
(80) Isoplast nuts
(2) Semi-automatic backwash controller
(See Controller Installation Section)
Verify that all parts listed above were supplied before beginning installation. Replacement
parts can be ordered through your local distributor.
STEP 1: 6” Valve Installation
Place a flange gasket on the influent and
effluent tank flanges. Align the holes in the
gasket with the holes in the flange ring on
the tank. Place valves on the flanges
aligning the holes on the valve flange with
the tank flange ring. Please note the
orientation of the valves. The arrows on
the valve covers should be pointing
toward the tank. Install isoplast bolts and
nuts on the influent and effluent flanges.
Snug the nuts to “hand tight”, but do not
fully tighten. This will allow for adjustments
during the remainder of the installation.