King Technology Perform-Max 920 User manual

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Customer Service 800-222-0169
www.KingTechnology.com
PERFORM-MAX™
POOL SANITIZER
Models 920, 940 & 980 (In-line)
Model 960 (Off-line)
In Ground Model 940 Above Ground Model 920
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TABLE OF CONTENTS
Introducing Perform-Max™ 3
Swimming Pool Tips 3
Installation Introduction 4
Parts List Model 920 5
Parts List Models 940, 960, 980 6
Base Installation Model 920 7
Filter Installation Model 920 8
In-Line Installation Model 940 9
In-line Installation Model 980 for 1 1/2” Plumbing 9
Off-Line Installation Model 960 10-11
Trouble Shooting 12
Relling Chemicals 13
Changing Chemicals (i.e. switching from chlorine to bromine) 13
Setting Control Dial 14
Replacing Control Dial O-rings 15
Replacing Cap O-rings & Knobs 16
Winterizing 16
For Proper Performance 17
Warranty 18
For information on King Technology’s entire product
line, visit our website at www.KingTechnology.com

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Perform-Max™
Thank you for choosing the Perform-Max Pool Sanitizer for you pool. Perform-Max precisely meters chlorine at a consistent
rate so you are ensured of a properly sanitized pool with less work and more time to enjoy.
Swimming Pool Tips
1. Before beginning with any
pool care program, you must
first balance your pool water.
Take a water sample to your
local pool professional or
use a complete test kit that
will test for the following
important elements.
2. If your fill water is high in
metals, use a sequestering
agent or metal-out product
at start-up. See your local
dealer for details on using
these products and always
follow manufacturer’s direc-
tions carefully.
3. After your pool is up and
running smoothly, continue
to test your water for pH,
total alkalinity and chlorine
and maintain its balance by
adding any necessary ad-
justment products (see your
dealer for details).
5. Shock the pool with
chlorine to rid water of all
contaminants before begin-
ning. Follow manufacturer’s
directions carefully. This
step is very important to
start-up. Use chlorine shock
only.
In-line unit for
in ground pools
Models #940 and #980
Off-line unit for in ground
and above ground pools
Model #960
In-line unit for
above ground pools
Model #920
Water Balance Guidelines
Free Chlorine: 1.0 - 3.0 ppm
Free Bromine 2.0 - 5.0 ppm
pH: 7.2 – 7.8
Total Alkalinity: 60 – 120 ppm
Calcium Hardness: 150 – 400
Total Dissolved Solids: <1500
Stabilizer: 20 – 80 ppm
Do not add
shock in or near
the skimmer or
into the Perform-
Max as it could
damage equip-
ment, risk poten-
tial explosion or
discolor your
pool surface.
4. Add a stabilizer or con-
ditioner to the pool at the
beginning of the season if
the stabilizer level is below
20 ppm. This will prevent
chlorine burn off. Follow
manufacturer’s directions
carefully.
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17"
2" I.D.
(Female
Threaded
7"
15 1/4"
1 1/2" i.d.
7 3/16"
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Perform-Max
Installation Above Ground Pools
In Ground Pools
Installation Tips:
Model #920
In-line for above ground
pools up to 25,000 gallons
using chlorine and up
to 15,000 gallons using
bromine. Installation
instructions are on pages
7 and 8. DO NOT INSTALL
OFF-LINE.
Model #940
In-line for in ground pools
up to 50,000 gallons using
chlorine and up to 25,000
gallons using bromine.
Installation instructions
are on page 9.
DO NOT INSTALL OFF-LINE.
Before installing the Perform-Max, make sure that:
You have all the supplies. The pump is turned off. The plumbing lines are dry.
Model #980
In-line for in ground pools
using 1 1/2” plumbing.
The same sizes apply.
Installation instructions
are on page 12.
DO NOT INSTALL OFF-LINE.
Model #960
Off-line for in ground or
above ground pools up
to 50,000 gallons using
chlorine and up to 20,000
gallons using bromine.
Installation instructions
are on pages 10 and 11.
DO NOT INSTALL IN-LINE.

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Parts List • Model 920
Included with Above Ground Model 920
REF. # DESCRIPTION QTY. INCLUDED
1 & 2 Cap w/O-Ring 1
3 Body 1
4 Pressure Relief Valve 1
5, 6, 7 Control Dial with O-Rings
& Locking Pin 1
8 & 9 Knob with O-Ring 2
10 Screen 1
13 Silicone Lubricant 1
Replacement Parts for Above Ground Model 920
REF. # PART NO. DESCRIPTION
1 & 2 01-22-1418 Cap w/O-Ring
2 01-22-1920 Cap O-Ring
4 01-22-9480 Pressure Relief Valve
5, 6, 7 01-22-1443 Control Dial with O-Rings
& Locking Pin
6 01-22-1450 Control Dial O-Ring Set
8 & 9 01-22-9940 Knob with O-Ring
10 01-22-9660 Screen
11 01-22-1710 Nipple Kit
12 01-22-1480 Mounting Base
13 01-22-9971 Silicone Lubricant
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Optional part- not included

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INCLUDED WITH • Models 940, 960 and 980
REF. # DESCRIPTION QTY. INCLUDED
1 & 2 Cap w/O-Ring 1
3 Body 1
4 Pressure Relief Valve 1
5, 6, 7 Control Dial with O-Rings 1
8 & 9 Knob with O-Ring 2
10 Screen 1
19 Cap/Control Dial Tool 1
20 Silicone Lubricant 1
REPLACEMENT PARTS • Models 940, 960 and 980
REF. # PART NUMBER DESCRIPTION
1 & 2 01-22-9411 Cap w/O-Ring
2 01-22-9920 Cap O-Ring
4 01-22-9480 Pressure Relief Valve
5, 6, 7 01-22-9440 Control Dial with O-Rings
6 & 7 01-22-9450 Control Dial O-Ring Kit
8 & 9 01-22-9940 Knob with O-Ring
10 01-22-9660 Screen
19 01-22-8870 Cap/Control Dial Tool
20 01-22-9971 Silicone Lubricant
INCLUDED WITH OFF-LINE Model 960
REF. # DESCRIPTION QTY. INCLUDED
11 2” Male Adapter 2
12 2” X 1/2” Bushing 2
13 90-Degree Elbow 2
14 Small Clamp 4
15 6’ PVC Tubing 1
16 Scoop Gasket 2
17 Venturi Scoop 2
18 Scoop Clamp 2
REPLACEMENT PARTS • Model 960
REF. # PART NUMBER DESCRIPTION
11 01-22-9490 2” Male Adapter
12 01-22-8620 2” X 1/2” Bushing
13 01-22-7800 90 Degree Elbow
14 01-22-7690 Small Clamp
15 01-22-7700 6’ PVC Tubing
16 01-22-7850 Scoop Gasket
17 01-22-7790 Venturi Scoop
18 01-22-7910 Scoop Clamp
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POOLS
ANITIZ
ER
8 & 9
1
2
3
4
5
67
98
11
12
13
14
15
14
19
20
Off-line parts
11 to 18
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13
14
15
14
INLET
Between
pump
and filter
OUTLET
After filter
and
heater
2” to 36” apart on straight pipe
11
16
17
18
Parts List Models 940, 960, 980

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TO POOL
PUMP
FILTER
TOOLS NEEDED
Screwdriver
Pipe Wrench
Materials Needed
Pipe Thread Tape
or Sealant
Two hose adapters
1 1/2” x 1 1/2” x 1 1/4”
Two Sections of 1 1/2”
Flex Hose (one provided
with filter)
Two
Hose
Clamps
Recommended
Corrosion Resistant
Check Valve
4-8 psi Back Pressure
To avoid over or under chlorination,
replace eye ball fittings in the return
jets to a smaller or larger size to
adjust back pressure.
10 x 1 1/4” Phillips
Pan Head Screws with
Washers
Apply pipe thread tape or
sealant to the threaded end of
both hose adapters.
1.
The Perform-Max should always be installed
between the filter and pool (or between heater
and pool if applicable).
Above Ground, Base Installation - Model 920
Screw adapters into each end of
Perform-Max Hand tighten. Finish
tightening by turning 1 to 2 revolutions
with wrench.
DO NOT OVER TIGHTEN.
2.
Attach the filter section of flex hose to one hose
adapter and the return section of flex hose to the other
hose adapter with clamps and tighten with screwdriver.
Bi-flow valve design allows water flow in either direction.
3.
Isolating the Perform-Max by installing a corrosion
resistant check valve is recommended.
4.
If you prefer to mount this
unit there is an additional
base part available - PN#
01-22-1480. Mount using
Phillips Pan head screws.
One in front and two in
back.
5.
REPLACEMENT PARTS • Model 960
REF. # PART NUMBER DESCRIPTION
11 01-22-9490 2” Male Adapter
12 01-22-8620 2” X 1/2” Bushing
13 01-22-7800 90 Degree Elbow
14 01-22-7690 Small Clamp
15 01-22-7700 6’ PVC Tubing
16 01-22-7850 Scoop Gasket
17 01-22-7790 Venturi Scoop
18 01-22-7910 Scoop Clamp
Option
1 1/2” Male Adapter
(slip x MPT)
or
2” Female Adapter
(slip x FPT)
When installing with hard
PVC pipe, use either a female
adapter on the outside port
threads or a male adapter on
the inside port threads.
CHECK
VALV E
BUSHING
HOSE
CLAMP
HOSE
ADAPTER HOSE
CLAMP
HOSE
ADAPTER
TO POOL
1 1/2" OR 1 1/4"
FLEX HOSE
1 1/2" x 1 1/2" x 1 1/4"
HOSE ADAPTER
HOSE
CLAMP
FILTER &
PUMP
• Install after all equipment and
as far as possible from heater.
• Any additional sanitizing
equipment that is installed with
Perform-Max must be installed after
Perform-Max (never before) on the
return line to the pool.

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Screw adapter into the other
side of Perform-Max.
Hand tighten. Finish
tightening by turning
1 to 2 revolutions
with wrench.
DO NOT OVER TIGHTEN.
5.
TOOLS NEEDED
Screwdriver
Pipe Wrench
MATERIALS NEEDED
Pipe Thread Tape
or Sealant
One 6” x 1 1/2” TBE PVC
Nipple
One Hose Adapter
1 1/2” x 1 1/2” x 1 1/4”
One Section of
1 1/2” Flex Hose
(provided with filter)
One
Hose Clamp
RECOMMENDED
Corrosion Resistant
Check Valve
4-8 psi Back Pressure
To avoid over or under chlorination,
replace eye ball fittings in the return
jets to a smaller or larger size to
adjust back pressure.
Above Ground, Filter Installation - Model 920
Apply pipe thread tape or
sealant to each threaded end
of nipple.
Screw one end of nipple
into the filter return.
Hand tighten. Finish tightening
by turning 1 to 2 revolutions
with wrench.
DO NOT OVER TIGHTEN.
Screw either side of
Perform-Max on to open
nipple end until upright
and secure.
Apply pipe thread tape or
sealant to threaded end
of hose adapter.
3.
4.
6.
Attach return section of hose to
the adapter with clamp. Tighten
clamp with screwdriver.
7.
Installing a corrosion resistant
check valve is recommended.
2.
1.
HOSE
ADAPTER
HOSE
ADAPTER
HOSE ADAPTER

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12" to 15"
12" to 15"
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PVC
CEMENT
TOOLS NEEDED
Pipe Wrench
Hacksaw
Tape Measure
MATERIALS NEEDED
Pipe Thread
Sealant
Primer and
PVC Cement
Two 2” Threaded
x 2” or 1 1/2” Slip
Male Adapters
(not Included)
RECOMMENDED
Corrosion Resistant
Check Valve
#10 x 1 1/4” Phillips
Pan Head Screws with
Washers
1. 2.
PVC
CEMENT
In Ground, In-line Installation - Model 940
OR
Do NOT install in copper pipe
as chemical corrosion occurs.
Do NOT install an in-line
Perform-Max off-line.
Bi-flow valve design allows
water flow in either direction.
Following pipe thread sealant
directions, brush sealant
onto Perform-Max threads
in both ports and both male
adapters.
DO NOT USE
PIPE THREAD TAPE
Screw a male adapter
into each port of Perform-Max.
Hand tighten. Finish
tightening by turning
1 to 2 revolutions
with wrench.
DO NOT
OVER
TIGHTEN.
Insert PVC pipe into male
adapters with a twisting
action. Hold in place
5 to 10 seconds to bond.
Isolating the Perform-Max by
installing a corrosion resistant
check valve is recommended.
3.
4. 5.
6.
7.
• Install after all equipment and
as far as possible from heater.
• Any additional sanitizing
equipment that is installed with
Perform-Max must be installed after
Perform-Max (never before) on the
return line to the pool.
Measure the distance
between Perform-Max male
adapters and cut out a
section of pipe 3” less than
that dimension.
Following Primer directions,
brush Primer on the inside of
the male adapters and to ends
of pipe. Repeat this process
with PVC cement following
directions on that product.
Leave 12” to
15” above and
around Perform-
Max to allow
room for easy
refilling.
PUMP
FILTER HEATER
(If
Installed)
*CHECK
VALVE
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Use Phillips
pan head
screws
through the
mounting
holes at the
Perform-Max
base to secure the Perform-
Max into a treated wood
base.
Perform-Max 980
Use the 2” x 1 1/2”
threaded bushing provided
for steps 1 through 3.
Repeat steps 1 through 3
using a 1 1/2” threaded
by 1 1/2” slip bushing (you
provide). Then follow the
remaining inline installation
instructions.
2” x 1 1/2”
Threaded
Bushing
1 1/2”
Threaded by
1 1/2” Slip
Bushing

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MATERIALS NEEDED
Pipe Thread
Sealant
Primer and
PVC Cement
OFF-LINE KIT
Included with the
Perform-Max
Two Male
Adapters
Two Reducer
Bushings
Two 90
Degree Elbows
Four Hose
Clamps
6’ of Tubing
Two
Scoops
Two Scoop
Gaskets
Two Scoop Clamps
RECOMMENDED
Corrosion Resistant
Check Valve
#10 x 1 1/4” Phillips
Pan Head Screws with
Washers
TOOLS NEEDED
Screwdriver
Pipe Wrench
Battery
Operated Drill
with 5/8” or 19/32”
Bit
In Ground, Off-line Installation - Model 960
Do NOT install an off-line
Perform-Max in-line as this
Perform-Max is different than
an in-line unit.
1.
When insufficient room for an in-line application, install off-line in
straight pipe with scoops between 2” - 36” apart. Install as far
from the heater as possible.
Bi-flow valve design allows water flow in either direction.
Following Primer directions,
brush Primer on reducer
bushings and inside of male
adapters. Repeat this process
with PVC cement following
directions on that product.
Insert reducer bushing
into male adapter on both
sides with a twisting action.
Hold in place 5 to 10 seconds
to bond.
Following pipe thread sealant
directions, brush sealant onto
elbow threads.
2.
3. 4. 5.
OR
PVC
CEMENT
PVC
CEMENT
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Following pipe thread sealant
directions, brush sealant
onto Perform-Max threads in
both ports and on both male
adapters.
DO NOT USE PIPE THREAD
TAPE as the threads
on these units are
not suitable for
this use and
leaking or fitting
failure could result.
Screw a male adapter
into each port of Perform-Max.
Hand tighten. Finish
tightening by turning 1 to 2
revolutions with wrench.
DO NOT
OVER
TIGHTEN.
SCOOPS
2” – 36” APART • Install after all
equipment and as far as
possible from heater.
• Any additional sanitizing
equipment that is installed
with Perform-Max must be
installed after Perform-Max
(never before) on the return
line to the pool.

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SCOOPS
2” – 36” APART
ON STRAIGHT PIPE
Screw elbow into reducer
bushings on both sides.
Cut tubing
to size
for each
Perform-
Max
connection
and attach
one to
each
elbow with
clamps.
Tighten clamps
with a screwdriver.
When pipe is
totally dry, drill two
19/32” or 5/8”
holes, between
2” - 36” apart, on
the return line. Be
careful not to go
through other side
of pipe.
Attach a gasket to
each scoop.
Place scoops inside
holes so the inlet
scoop faces the water
flow and the outlet
scoop faces away
from the water flow.
Scoop arrows should
be facing each other
when correct.
2” – 36” apart on straight pipe
Arrows on scoops must face
each other.
Attach scoop clamps
over the scoops and
around the pipe.
Tighten scoop clamps
with a screwdriver.
Attach each hose to venturi
scoop male nipple with a
small clamp and tighten with
screwdriver.
For best results use Phillips
pan head screws through
the mounting holes in the
Perform-Max base to secure
the Perform-Max into a treated
wood base.
Isolating the Perform-Max by installing a corrosion resistant
check valve is recommended.
6. 7. 8. 9.
10. 11. 12.
13. 14. 15.
16.

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1.
3.
4.
5.
2.
Troubleshooting
1. Make sure your filtration
system is working properly
(i.e. clean filter, skimmer and
pump basket).
2. Make sure circulation time
is adequate – increase pump
time if not.
3. Make sure the pool is
properly balanced
(see page 3).
4. Shock the water to
eliminate build up of any
organic matter.
5. Make sure pool has a
free chlorine reading of
1.0 to 3.0 ppm.
6. Check with your dealer
for more information.
1. Metals in the fill water may
have been oxidized. Have the
pool tested. Shock the pool
and clean the filter until water
clarity returns.
2. Algae may be trying to
form – shock the pool,
increase circulation time if
needed and clean the filter.
3. Check with your dealer for
more information.
1. Use an algaecide per the
directions on the bottle and
brush the sides of the pool
often.
2. Clean the filter and shock
the pool with chlorine daily
until water clarity returns.
3. Check with your dealer for
more information.
1. Make sure there are chlorine
tablets in the Perform-Max.
Consider using 1” tablets over
3” pucks for greater output.
2. If reading dropped below
1.0 ppm, shock pool. Turn
control dial to minimum when
shocking and NEVER ADD
SHOCK IN OR NEAR THE
SKIMMER. Reset dial 1/2
setting higher than before
and continue monitoring daily
until desired chemical level is
acheived.
3. Make sure pump run time
is at least 6 hours on high
speed (40 gpm or higher) or
if not, bleed the air from the
cap knob (see page 17 for
directions).
4. Try bleeding the air, soaking
tablets for greater output.
5. Contact your dealer to have
your back pressure tested to
ensure it is at least 4 psi.
6. Check for a suction side
leak by looking for air bubbles
in your pump basket or at the
return jet. Contact dealer for
help in correcting this situation.
7. Contact King Technology’s
Customer Service Department
at 800-222-0169.
1. Turn dial to minimum or
0. When reading drops to
desired ppm, reset dial
1 setting lower than the
starting dial setting and
continue monitoring daily.
2. Consider switching 1 inch
tablets to 3 inch pucks for
less output.
3. If over-chlorinating at the
lowest possible setting,
consider decreasing the
circulation time. Depending
on your pump size, you may
be circulating the water
more than is necessary.
4. Contact your dealer to
have your back pressure
tested. If over 8 psi consider
a larger eye-ball fitting in the
return jet.
5. Check to see if the
pressure relief valve is
loose or missing and
replace. It is a clear plastic
piece approximately 1” long
installed inside near the base.
If loose or missing, it can
provide another avenue for
water to reach the chlorine.
6. Contact King Technology’s
Customer Service Department
at 800-222-0169.
What do I do
if I am over
chlorinating?
What do I do
if I am under
chlorinating?
What do I do
if algae forms in or
on my pool?
What do I do
if the water turns
color?
What do I do
if the water looks
cloudy?
Problem Remedy
For more in-depth troubleshooting, go to www.KingTechnology.com

13
USE ONLY slow dissolving trichloro-s-triazinetrione (trichlor) tablets or pucks or bromine
tablets or sticks in the Perform-Max. NEVER MIX CHEMICALS.
DO NOT USE ...CALCIUM HYPOCHLORITE, FAST DISSOLVING TRICHLOR OR ANY
GRANULAR OR LIQUID MATERIAL IN THE PERFORM-MAX. Use of these products could
result in over chlorination, bleached liners, unsafe pool conditions, fire or explosion.
Turn pump off.
Models 940, 960, 980 Model 920
Models 940,
960, 980
Open the cap. For in
ground pools use the
cap tool included with
cycler to loosen cap by
hitting the handle with
the flat of your hand
counterclockwise. Stand
back upon removing cap
to avoid inhaling fumes.
Refilling
Chemicals
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Unscrew knob in back of
Model 920 or cap knob
on Models 940, 960 and
980 to relieve pressure.
1
3
4
5
6
7
9
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DO NOT USE CAP TOOL TO
TIGHTEN CAP. FOR REMOVAL ONLY
Replace knob.
Fill unit to top with either
recommended chlorine or bromine.
DO NOT MIX BROMINE AND
CHLORINE. Do not put small
particles in feeder. Always wear
protection for eyes, skin and
clothing. Avoid sparks, open flame or
smoking when handling chemicals.
Replace cap by hand only. DO NOT
OVER TIGHTEN.
Turn dial to Minimum or
0. This reduces the flow
of water into the unit
when the cap is open.
1.
4.
5.
6.
7.
2.
3.
Models 940, 960, 980 Model 920
Models 940, 960, 980
Models 940, 960, 980
Models 940, 960, 980
Model 920
Model 920
Model 920
Operate Perform-Max until empty of
all chemical. When empty, set control
dial to maximum or 10 and let run
empty 24 hours.
Make sure all small particles have
dissolved and been flushed out of
feeder. Fill unit with new chemical
following steps 1-7 above.
DO NOT MIX BROMINE AND
CHLORINE. Do not put small
particles in feeder.
1
3
4
5
6
7
9
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MIN
MAX
8
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A
4
5
6
7
9
8
MAXIMUM
Changing Chemicals
(i.e. switching from chlorine to bromine)
Model 920

14
Setting Control Dial
1.
2.
3.
4.
When using slow dissolving trichlor, the Perform-Max should be operated based on its normal erosion design where only the bottom layer
of tablets are wetted. This provides better controllability and longer lasting sanitation per refil.
When using bromine, the Perform-Max should be operated as a soaking feeder as this chemical works best when all tablets are wetted.
Therefore bleeding the air on these units is recommended when using bromine.
For all pools using
CHLORINE......
For all pools using
BROMINE....
set the control dial at #4.
With bromine only, bleed
air from unit by partially
unscrewing back knob on
Model 920 or cap knob on
Models 940, 960 & 980 while
the pump is running until
water appears. Tighten knob.
For the first week or so,
test the water daily for free
chlorine or bromine.
After day one, adjust the dial up by 1/2 increment if the
reading has dropped or down by 1/2 increment if the
reading has risen. Continue this process each day until
the reading stabilizes at your desired level between 1.0
and 3.0 ppm.
set the control dial at #2.
Remember to adjust dial by 1/2 increments only.
Higher than suggested settings could result in over
chlorination and/or bleached pool surfaces.
For Models 940, 960 & 980
use the handle end of cap
tool if the dial is hard to turn.
Models 940, 960, 980 Model 920
Models 940, 960, 980 Model 920
Models 940, 960, 980 Model 920
24 HOUR, LOW-SPEED PUMP RUN TIME
In order to ensure proper performance when running the pump on low speed for 24 hours per day or high speed less than 6
hours per day, bleed the air while the pump is on by unscrewing the cap knob until water appears. Then screw the knob back on.
Repeat this process each time the cap is removed for any reason. Set the control dial at 6 and follow the adjustment directions
in Step 2 to determine the correct setting for your pool.
Shock pool every week or as
needed to maintain water quality.
Follow label directions on the
shock treatment used.
Do not add shock in or near the skimmer
or into the Perform-Max as it could damage
equipment, risk potential explosion or
discolor your pool surface.

15
Back
o-ring
Center of locking pin
Replacing Control Dial O-Rings
1. In the back of the
Perform-Max depress center
of locking pin with a finger
and pull pin out of dial.
2. Turn control dial back and
forth as you pull it out of the
housing.
3. Replace both o-rings.
Apply silicone lubricant that
came with your Perform-Max
on o-rings.
4. Carefully insert control
dial back into housing.
5. Replace locking pin by
pushing it through the slots
on the dial until it locks into
place.
1. Using a needle nose pliers,
find the snap ring tail located
at approximately the 5 o’clock
position under the control dial.
2. Pull down and out of the
groove.
3. Using a large screwdriver,
loosen the control dial. Carefully
pry the dial until it pulls out.
4. Carefully replace the rubber
o-ring without stretching it. Apply
silicone lubricant that came with
your Perform-Max on o-ring.
5. Push control dial completely
into the housing and turn the dial
to setting 2.
6. Insert the non-lipped end of
snap ring into the groove opening
beginning at the 5 o’clock
position and push it up so that it
threads itself around the control
dial.
7. Using a small screwdriver
or pointed tool to help guide it,
make sure the snap ring stays in
the groove as it is inserted.
Model 920 Models 940/960/980
Center of locking pin
S
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16
Winterizing
1. Hold cap in front of you
upside down with the o-ring
groove facing up. Place one
end of o-ring into cap groove
at the point closest to you.
Hold o-ring down with the
thumb and index finger of one
hand.
2. Take hold of the far end
of the o-ring with the thumb
and index finger of the other
hand. Roll o-ring slightly back
towards you as you stretch
the o-ring into the remainder
of the cap groove.
3. Lubricate o-ring often with
silicone lubricant that came
with your Perform-Max. DO
NOT USE petroleum based
lubricants.
Replacing Cap O-ring
Replacing Knobs To replace, simply unscrew old knob
and replace with the new one.
• Front of 920 Perform-Max
• Back of 920 Perform-Max
• Back of Models 940, 960
& 980
• Cap of Models 940, 960 &
980
1. Operate Perform-
Max until empty of all
chemical. When empty,
set control dial to
maximum or 10 and let
run empty for 24 hours.
2. Turn dial to minimum
or 0. Turn pump off.
Unscrew back knob on
Model 920 or cap knob
on Models 940, 960 &
980 to relieve pressure.
3. Remove cap.
4. Unscrew knob in front
of Model 920 and in
back of Models 940,
960, and 980. Allow all
water to drain.
5. Replace the cap and
knobs loosely.
S
IL
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N
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L
U
B
R
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C
A
N
T
Models 940,
960, 980
Models 940,
960, 980
Model
920
Model
920
4
5
6
7
9
8
MAXIMUM
Model 920
Model 920
Models
940, 960,
980
Models
940, 960,
980
Models
940, 960,
980
Model 920
Models 940, 960, 980 Model 920
Models 940, 960, 980 Model 920

17
9
9
9
9
99
9
9
9
PUMP
1
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6
7
9
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8
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A
1) If using a multi-speed pump, run pump for at
least 6 hours per day at high speed (at least
40 gpm).
If the pump will run on low speed 24
hours per day or less than 6 hours per
day on high speed, you must bleed the
air while the pump is on by unscrewing
the cap knob until water appears. Then
screw the knob back on. Repeat this
process each time the cap is removed
for any reason.
2) Install system with 4-8 psi back pressure.
Lower back pressures could result
in under chlorination. Adjust eye ball
fittings in the return jets to a smaller
size to increase back pressure.
Contact King Technology at 800-222-
0169 for a cap tapped for a pressure
gauge to determine back pressure at pool start-up.
3) Special installation:
• If water ow is higher than 80 gpm, see
diagram A.
• If an in-oor cleaner is included with pool,
see diagram B, with two options. Preferred
installation is Option 1 with two separate lines.
• If set-up is a pool and spa combination with
common equipment, see diagram C.
• Any additional sanitizing equipment that is installed
with Perform-Max must be installed after Perform-Max
(never before) on the return line to the pool.
NOTE: Over chlorination or damage to the Perform-
Max or other equipment could result if these special
installations are not used in these situations.
A. With High GPMS
Install T-fittings exactly as shown.
C. Pool and Spillover Spa Combination
B. With In-Floor Cleaner - TWO OPTIONS
✙
PUMP
✙
✙
✙
PUMP
POOL WATER LEVEL
POOL WATER LEVEL
Flow
Flow
HEATER
1
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5
6
7
9
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8
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The best option is to have two lines. One line with pump, filter, heater
and Perform-Max and a second line with a separate pump for the in-floor
cleaning system (filter optional).
OPTION 1- A Two-Line Installation
OPTION 2 - A 3-Way Valve Installation
POOL WATER LEVEL
POOL WATER LEVEL
POOL WATER LEVEL
POOL RETURN
3-way manual valve or 3-way motor valve plus controls
Perform-Max
Perform-Max
IN-FLOOR
CLEANER VALVE
IN-FLOOR
CLEANER VALVE
Line 1
Line 2
TO POOL
Perform-Max
CHECK
VALVE
SUCTION
FROM
POOL/SPA
TO POOL
TO SPA
3-WAY VALVE
Perform-Max
CHECK VALVE
PUMP
SUCTION
FROM
POOL/SPA
For Proper Performance

18
Limited One-Year Warranty
King Technology, Inc. warrants to the original purchaser this
unit will be free from any defects in workmanship and/or
material, for a period of one (1) year from the date of original
purchase. This warranty covers body, cap and control dial, but
specifically excludes o-rings. King Technology at its option may
replace any defective parts or the entire unit without charge
after it is determined what is needed to correct any deficiency.
Replacement parts with the exception of o-rings are warranted
for the remainder of the original warranty.
1. To obtain warranty service, you must deliver product to King
Technology or its nearest authorized dealer. Shipping expenses
are the purchaser’s responsibility. The name of the nearest
authorized dealer can be obtained by writing or calling King
Technology at the address and telephone number provided
below. Proof of purchase is required when requesting warranty
service. Purchaser must present the sales receipt or other
document which establishes proof of purchase.
2. This warranty does not cover defects caused by: Modification,
alteration, repair or service of the product contrary to the
accompanying instructions; physical abuse to or misuse of
the product or operation or installation in a manner contrary
to the accompanying instructions. This warranty also excludes
all costs arising from the installation, adjustment, removal or
replacement of defective units or parts. This warranty also
excludes any and all claims arising out of the chemicals used in
the product or their characteristics.
3. CAUTION - Read carefully - Do not add shock in or near
skimmer.
A. This unit is not designed for shock treatment of spas
or pools. See your spa or pool dealer or distributor for
further information concerning shock treatments.
B. Control dial settings higher than needed can result
in excess sanitizers being discharged into the pool. If the
sanitizer level goes unmonitored, it can result in
bleaching or discoloration of areas around the pool inlet
or in some cases bleaching or discoloration of the entire
pool liner or paint.
C. Excess trichlor or bromine in the spa or pool can
create health hazards to bathers. Consult each chemical
manufacturer’s warnings and cautions for specifics.
D. Misuse or failure to use the proper chemical for
Perform-Max as directed in the instruction manual
may cause damage to equipment or personal injury.
This warranty will be null and void if this unit is not used
with the recommended trichlor or bromine tablets.
4. This warranty is the exclusive warranty for the Perform-Max™
feeder. This warranty is not transferable. KING TECHNOLOGY
MAKES NO REPRESENTATION OR WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, AS TO MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE OR ANY OTHER MATTER
CONCERNING THE PERFORM-MAX FEEDER. Any express
warranty not provided herein, and any remedy for breach of
contract but which for this provision might arise by implication
or operation of law is hereby excluded and disclaimed. THE
EXCLUSIVE REMEDY FOR ANY CUSTOMER IS THE REPAIR
OR REPLACEMENT OF THE UNIT, AND THE RECOVERY OF
DAMAGES WILL NOT EXCEED THE PURCHASE PRICE OF THE
UNIT. IN NO EVENT WILL KING TECHNOLOGY BE LIABLE FOR
ANY INCIDENTAL, CONSEQUENTIAL, SPECIAL OR PUNITIVE
DAMAGES FROM ANY CAUSE.
5. Under no circumstance shall King Technology be liable to
purchaser or any other person for any damage or loss incurred
because of any chemicals used in the product or their physical
characteristics, or interruption of service of the product, or
any resulting special, incidental or consequential damages or
losses, whether arising out of breach of warranty, breach of
contract or otherwise. Some states do not allow the exclusion
or limitation of incidental consequential damages, so the above
limitation or exclusion may not apply to you.
Manufactured by: King Technology, Inc.
530 11th Ave S, Hopkins, MN 55343 U.S.A.
952-933-6118 • 800-222-0169 • FAX [phone]
www.KingTechnology.com
Made in U.S.A.
Patents: www.KingTechnology.com/IP
20-48-0118
553111443R6N