Jandy DEL Series User manual

H0238800D
Installation and
Operation Manual
Jandy®
Diatomaceous Earth
Pool Filters
DEL Series Filters
WARNING
FOR YOUR SAFETY - This product must be installed and serviced by a professional pool/
spa service technician. The procedures in this manual must be followed exactly. Improper
installation and/or operation can create dangerous high pressure which can cause the filter
lid to be blown off, possibly causing death, serious injury or property damage. Improper
installation and/or operation will void the warranty.
Before installing this product, read and follow all warning notices and instructions that
accompany this filter. Failure to follow warning notices and instructions may result in
property damage, serious injury, or death.
Installation and Operation Data

Page 3Diatomaceous Earth Pool Filters - DEL Series Filter
DATE OF INSTALLATION
INITIAL PRESSURE GAUGE READING (WITH CLEAN FILTER)
PUMP MODEL HORSEPOWER
FILTER MODEL SERIAL NUMBER
NOTES:
EQUIPMENT INFORMATION RECORD
TABLE OF CONTENTS
Section 1. Safety Information ........................... 4
1.1 Important Safety Warning ........... 4
1.2 General Safety Instructions ......... 4
Section 2. General Information......................... 5
2.1 Introduction ................................. 5
2.2 Description .................................. 5
2.3 General Requirements................. 5
2.4 DE Requirements ........................ 5
Section 3. Installation Instructions.................... 6
3.1 Filter Location............................. 6
3.2 Filter Preparation......................... 6
3.3 Filter Installation ......................... 6
3.4 Clamp Installation, DEL Series... 8
Section 4. Start-Up and Operation.................... 9
4.1 Preparing Diatomaceous Earth.... 9
4.2 Coating the Filter Grids............... 9
4.3 New Pool and Seasonal Start-up . 10
4.4 Valve Operation........................... 10
Section 5. Filter Disassembly and Assembly.... 10
5.1 Filter Tank Disassemby/Assembly 10
5.2 Filter Grid Disassembly/Assembly 11
Section 6. Maintenance..................................... 11
6.1 General Maintenance................... 11
6.2 Backwashing ............................... 12
6.3 Pressure Gauge............................ 12
6.4 Cleaning the Filter Grids with Water
..................................................... 12
6.5 Cleaning Filter Grids with Muriatic
Acid ............................................. 12
Section 7. Winterizing....................................... 12
Section 8. Troubleshooting ............................... 13
Section 9. Parts List and Exploded View.......... 14
9.1 Jandy®DEL Filter Parts List ....... 14
9.2 Jandy®DEL Filters Exploded View
..................................................... 14
Section 10. Head Loss Curves........................... 15
10.1 Jandy®DEL Filter Design Head Loss
Curves.......................................... 15
Warranty ....................................................... 16

Page 4
Section 1. Safety Information
1.1 Important Safety Warning
1. Before repositioning valve(s) and before beginning the assembly, disassembly, or adjustment of the clamp, or
any other service of the circulating system; (A) turn the pump off and shut off any automatic controls to ensure
the system is not inadvertently started during servicing; (B) open the air release valve; (C) wait until all pressure
is relieved (air will have stopped flowing from the air release valve).
2. Whenever installing the filter clamp follow Section 3.4 of this manual, "Clamp Installation".
3. Once service on the circulation system is complete, follow Section 4 of this manual, "Start-up and
Operation".
4. Maintain circulation system properly. Replace worn or damaged parts immediately.
5. Be sure that the filter is properly mounted and positioned according to these installation instructions.
6. Do not pressure test above 50 PSI. Pressure testing must be done by a trained pool professional.
SAVE THESE INSTRUCTIONS.
ATTENTION INSTALLER:
This manual contains important information about the installation, operation and safe use of this
product. This information should be given to the owner/operator of this equipment.
1.2 General Safety Instructions
WARNING
NEVER OPERATE OR TEST THE FILTER SYSTEM AT MORE THAN 50 PSI.
THIS FILTER OPERATES UNDER HIGH PRESSURE. WHEN ANY PART OF THE
CIRCULATING SYSTEM, i.e., FILTER, PUMP, VALVE(S), CLAMP, ETC. IS SERVICED,
AIR CAN ENTER THE SYSTEM AND BECOME PRESSURIZED WHEN THE SYSTEM IS
RESTARTED. PRESSURIZED AIR CAN CAUSE THE FILTER LID TO BE BLOWN OFF
WHICH CAN RESULT IN DEATH, SERIOUS PERSONAL INJURY OR PROPERTY DAMAGE.
TO AVOID THIS POTENTIAL HAZARD, FOLLOW ALL OF THE INSTRUCTIONS IN THIS
MANUAL.

Page 5Diatomaceous Earth Pool Filters - DEL Series Filter
Section 2. General Information
2.1 Introduction
This manual contains information for the proper instal-
lation and operation of the Jandy® DEL Series Diato-
maceous Earth (DE) Filters. Procedures in this manual
must be followed exactly. To obtain additional copies of
this manual contact us at 707.776.8200
ext. 237. For address information see back cover.
2.2 Description
Dirty water flows into the filter through the lower bulk-
head on the bottom of the tank and is directed through
the DE grids. The debris is collected on the surface of
the grids as the water flows through them. The clean
water is directed into the manifold, then through the
outlet tube, and finally, out of the filter through the up-
per bulkhead on the bottom half of the tank. The filtered
water then goes into a MPV (Multiport Valve) and is
returned through the piping system to the pool.
As debris collects in the filter, the pressure will rise
and water flow to the pool will diminish. The filter will
eventually become so plugged with debris that it will
be necessary to perform the backwash procedure. It is
important to know when to backwash the filter. See Sec-
tion 6 for further discussion of backwashing the filter.
NOTE A filter removes dirt and other suspended particles
but does not sanitize the pool. Pool water must be
sanitized and chemically balanced for clear water.
The filtration system should be designed to meet
local health codes. At a minimum, the system should
turnover the total volume of water in your pool two to
four times in a 24 hour period.
2.3 General Requirements
1. For best overall performance place the system as
close to the pool as possible.
2. The filter should be located on a level concrete
slab so that the orientation of the valve outlets and
the pressure gauge are convenient and accessible
for the installation and operation of the unit.
3. Protect the filter from the weather.
4. If fitting a chlorinator and/or any other device into
the filtration plumbing circuit, great care must be
xercised to ensure that the appliance is installed in
accordance with the Manufacturer’s Instructions
and any standards that may exist.
5. We recommend the use of barrel unions to connect
each component of the water conditioning system
to ease in future servicing. Barell unions are
provided with all Jandy filters.
6. When performing hydrostatic pressure tests or
when testing for external leaks of the completed
filtration and plumbing system, ensure that
the maximum pressure the filtration system is
subjected to does not exceed the maximum
working pressure of any of the components
within the system.
2.4 DE Requirements
See your local pool distributor or dealer for DE type
recommendations. See Table 2 on page 9 for the amount
of DE to be used.
2.5 Specifications and Dimensions
See Table 1 and Figure 1.
DEL48 DEL60
Filter Area (ft2)4860
Design Flow Rate (gpm/ft2) 2.00 2.00
Max. Flow (gpm) 96 120
Six Hour Capacity (gal.) 34,560 43,200
Normal Start Up Pressure (psi) 6-15 6-15
Max. Working Pressure (psi) 50 50
Dimension "A" 41 in 47 in.
Table 1. DE Filter Specifications
WARNING
The maximum working pressure for this filter is 50
psi. Never subject the filter to pressure exceeding 50
psi, even when conducting hydrostatic pressure tests.
Pressures above 50 psi can cause the lid to be blown
off.
Figure 1. Dimensions, Jandy DEL Series Filter
with Jandy NeverLube®Backwash Valve
INLET
OUTLET
"A"
18½"
10½"
25"

Page 6
FILTER
Figure 2. Filter Location
6" MINIMUM
CLEARANCE
6" MINIMUM CLEARANCE
CAUTION
Maintain your pressure gauge in good working order.
The pressure gauge is the primary indicator of how
the filter is operating.
WARNING
Water discharged from an improperly positioned filter
or valve can create an electrical hazard which can
cause death, serious injury or property damage.
Section 3. Installation Instructions
3.1 Filter Location
1. Select a well-drained area, one that does not flood
when it rains. Damp, non-ventilated areas should
be avoided.
2. Provide solid mounting for the filter and pump
system. Install system on a concrete slab or solid
concrete blocks to avoid risk of settlement. Do not
use sand to level the filter as the sand will wash
away. Filters, once loaded with media, can weigh
up to 800 lbs.
3. Install electrical controls at least five (5) feet from
the filter. This will allow enough room to stand
away from the filter during start-up.
4. Allow sufficient clearance around the filter to
permit a visual inspection of the clamp ring (see
Fig. 2).
5. Allow sufficient space above the filter to remove
the filter lid and filter element for cleaning and
servicing.
6. Position the filter to safely direct water drainage.
Align the air release valve to safely direct
pressurized purged air or water.
7. If the filter needs to be located above the water
level of the pool, it can be raised 2.5 ft. without
affecting the pump efficiency. A check valve is
recommended on the suction line to the pump.
8. If the filter is to be installed below the water level
of the pool, isolation valves should be installed on
both the suction and return lines to prevent back
flow of pool water during any routine servicing
that may be required.
3.2 Filter Preparation
1. Check carton for damage due to rough handling
in shipment. If carton or any filter components are
damaged, notify carrier immediately.
2. Carefully remove the accessory package.
3. With the carton in an upright position, remove the
filter tank from the carton.
4. A visual inspection of all parts should be made
now. See parts list on page 14.
CAUTION
DO NOT move the filter tank without the shipping
screw in place or the filter grids may be damaged
while installing the filter tank.
3.3 Filter Installation
1. This filter operates under pressure. When clamped
properly and operated without air in the water
system, this filter will operate in a safe manner.
2. If doubt exists as to the pressure which the system
will be subjected to, install an ASME approved
automatic Pressure Relief Valve or Pressure
Regulator in the circulation system set to the
lowest working pressure of any of the components
in the system.
3. Place the filter on the concrete pad, lined up with
the inlet/outlet pipes (see Fig. 3). Remove the
shipping screw.
4. To mount the pressure gauge/air release assembly
to the top of the filter tank (located in the
accessory bag):
a. Place the smaller, thicker o-ring onto the
threads of the tank adapter (see Fig. 4). Slide
the tank adapter through the coupling nut and
into the filter tank. Use the flats on the tank
adapter to tighten. Do not overtighten.
b. Place the larger, thinner o-ring onto the
gauge housing. Thread the housing into the
coupler on the tank adapter.

Page 7Diatomaceous Earth Pool Filters - DEL Series Filter
Figure 3. Basic Pool/Spa Combination Plumbing
Laars Heater
Waterfall
Pool Return
Spa Make Up
Spa Return
From Pool Skimmer
From Pool
Drain
Spa Suction
Jandy Pump
Jandy
Check
Valve
Outlet Port
Inlet Port
Jandy Filter
c. Orient the gauge/air release assembly in the
desired position. Raise and thread the locknut
onto the bottom of the gauge/air release
assembly. Hand tighten the nut only. Using
a wrench to tighten the nut may damage the
nut, gauge or air release assembly.
5. To reduce pressure losses, 2" (minimum) piping is
recommended for plumbing the system.
Figure 4. Pressure Gauge/Air Release Assembly
Housing
O-Ring
O-Ring
Tank Adapter
Tank Adapter
to Housing
Coupler
6. For best efficiency use the fewest possible number
of fittings. This will prevent a restriction in the
water flow.
7. Make all plumbing connections in accordance
with local plumbing and building codes. Filter
connections are provided with an o-ring seal. To
avoid damage to the o-rings, use only a silicone
base lubricant on the o-rings. Do not use pipe joint
compound, glue or solvent on inlet/outlet union
coupling nuts.
8. Keep piping tight and free of leaks. Pump suction
line leaks may cause air to be entrapped in filter
tank or loss of prime at the pump. Pump discharge
line leaks may show up as dampness or jets of
water.
9. Support the inlet/outlet pipes independently to
prevent any undue strains on the filter MPV.
10. Connect the pipes using the unions supplied with
the filter. Do not use teflon tape or pipe dope on
any unions. Assemble the unions dry and hand
tighten.
Caution
Be sure that all provisions for wastewater disposal
meet local, state or national codes. One hundred
gallons (100 gals.) or more of pool water will be
discharged during filter backwashing. Do not
discharge water where it will cause flooding or
damage.

Page 8
Figure 6. Filter Clamp Ring Assembly
"T" Nut Threaded
Rod
Tightening
Nut w/
Shoulder
Clamp
Ring
Tightening
Nut w/
Shoulder
Use a 9/16" Socket
Clamp Ring,
Closed Position
GAP NOT TO EXCEED
1/16"
Figure 5. Filter Clamp Ring
WARNING
Follow these instructions carefully. Improper clamp
installation can cause the filter lid to be blown off
which can result in death, serious personal injury or
property damage. Clamp Ring
"T" Nut and
Threaded Rod Tightening Nut
w/ Shoulder
3.4 Clamp Installation, DEL Series
1. Be certain the o-ring is in position in the lower
tank half. Press the filter lid over the lower half
sandwiching the o-ring between the two halves.
2. Holding the ends of the filter clamp apart, position
the hinged segment of the filter clamp over both
upper and lower tank flanges. Bring the ends of the
filter clamp together.
3. Place the "T" nut and threaded rod assembly into
the clamp. Be sure the "T" nut is seated in the
clamp in the proper orientation (See Fig. 6).
4. Use a 9/16" socket on the tightening nut until the
clamp ring halves touch each other, or are within
1/16" (See Fig. 6) but do not overtighten as the
clamp can break. If unable to tighten as indicated,
do not operate the filter and call a service
technician immediately.
5. After the first week of operation, check the clamp
and retighten if necessary.
6. Check the filter clamp at least once a month.

Page 9Diatomaceous Earth Pool Filters - DEL Series Filter
WARNING
NEVER operate the filter system at more than 50 psi
of pressure. Operating the filter system in excess of
50 psi can cause the filter lid to be blown off, which
can cause death, serious personal injury or property
damage.
Caution
DO NOT operate filter at water temperatures above
120° F (65.5° C). Water temperatures above the
manufacturer's recommendations will shorten the life
span of the filter and void the warranty.
WARNING
NEVER start pump while standing within five (5)
feet of the filter. Starting the pump while there is
pressurized air in the system can cause the filter
lid to be blown off, which can cause death, serious
personal injury or property damage.
Section 4. Start-Up and Operation
WARNING
Changing the multiport valve handle while there is
pressurized air in the system can cause the filter
lid to be blown off, which can cause death, serious
personal injury or property damage.
Caution
Dust released during normal handling of diatomaceous
earth can cause eye and respiratory irritation. Prolonged
breathing of excess concentrations of dust may cause
lung damage.
Caution
Never operate filter in excess of three (3) minutes
without use of diatomaceous earth (DE). DE is the
substance that filters the water, the filter cloth merely
supports the DE. Operating without DE will damage
filter grids and shorten filtering cycles.
4.1 Preparing Diatomaceous Earth
Your fi lter requires diatomaceous earth (DE) for proper
filtration and operation. The filter grids must be
precoated with DE in order to protect their surfaces and
provide the most efficient filtering action. Refer to
Table 3 for the proper quantity of DE to use with your
filter.
1. Using a one (1) pound coffee can, fill the can
with diatomaceous earth (DE). Do not pack or
compress the DE into the can.
2. Mix the required amount of DE with sufficient
water in a separate bucket to make a thin, milky
mixture (slurry).
NOTE Excess DE will clog the system. Use amount
specified in this manual.
3. Use the following instructions to coat the filter
grids.
Table 2. DE Slurry Mixture
Model
No.
DE Quantity No. of 1 lb.
Coffee Cans
(lbs.) (kg.)
DEL48 5.0 2.0 10
DEL60 6.0 2.7 12
4.2 Coating the Filter Grids
1. Prepare recommended amount of DE as outlined
in Section 4.1.
2. Start the filter system as outlined in Section 4.3.
3. With the pump running and the pool skimmer
valve open, slowly pour the mixture directly into
the pool's skimmer basket. The slurry will be
drawn into the filter.
4. After coating of grids, rotate the bezel of the
pressure gauge so that the arrow next to the word
"CLEAN" is aligned with the needle of the gauge.
This marks the original starting pressure of the
system.
5. Clean the filter when the pressure of the system
increases so that needle of the gauge aligns with
the arrow next to the word "DIRTY" on the bezel
of the gauge. This indicates an increased pressure
of between 10 and 12 psi above original starting
pressure.

Page 10
4.3 New Pool and Seasonal Start-up
1. Set the filter valve (MPV or backwash) to the
"FILTER" position.
2. Open the pump hair/lint pot lid and fill the pump
basket with water to prime the system. Replace the
lid. (You may have to do this several times on new
and seasonal start-ups.)
3. Completely open the air release valve on the
gauge/air release assembly by turning the knob on
the back of the assembly fully counterclockwise
(do not remove the knob).
4. Be sure to open any filter isolation valves that
were installed in the system and that the filter drain
plug is in place.
5. Stand clear of the filter and start the pump to
circulate water through the system. When a steady
stream of water starts to come out of the air release
valve, close the valve.
6. If this is a new filter, or the filter has just been
backwashed, add the DE slurry as described in
section 4.2.
7. Watch the pressure gauge to be sure that the
pressure does not exceed 50 psi in the filter for
normal operation. If the pressure approaches these
limits, turn off the pump and backwash the filter
(see Section 6.2). If the pressure remains high after
backwashing and reapplying the DE slurry, refer
to the troubleshooting guide on page 13 to identify
possible causes and solutions.
8. After the pressure gauge has stabilized, turn the
bezel ring so that the arrow next to the word
"CLEAN" aligns with the needle of the gauge. As
the filter cleans the water, the grids will clog over
time, and the pressure will increase. When the
needle of the pressure gauge aligns with the arrow
next to the word "DIRTY" on the bezel ring, it is
time to backwash the filter (see Section 6.2).
4.4 Valve Operation
1. The flow of water through a DE filter is controlled
by an optional backwash valve or multiport valve
(MPV).
2. The handle on top of the backwash valve or MPV
can be moved to different positions. The function
of each position is described below (see Fig. 7).
NOTE Depending on the model of backwash valve or MPV
installed with your filter, it may have all or only some
of the positions described in Table 3.
WARNING
NEVER attempt to assemble, disassemble or adjust
the filter when there is pressurized air in the system.
Starting the pump while there is any pressurized air
in the system can cause the filter lid to be blown off,
which can cause death, serious personal injury or
property damage.
Table 3. Valve Positions for Multi Port Valve
Position Function
FILTER Normal filtration and vacuuming.
BACKWASH Cleaning filter by reversing the flow.
RINSE Used after backwash to flush dirt
from the valve.
WASTE Bypasses filter; used for vacuuming
to waste or lowering water level.
RECIRCULATE Bypasses filter for circulating water
to the pool.
CLOSED Shuts off all flow to the filter and
pool.
Figure 7. Multi Port Valve Handle Positions
Rinse
Closed
Recirculate
Backwash
Waste
Filter
R
Section 5. Filter Disassembly and
Assembly
5.1 Filter Tank Disassemby/Assembly
1. Backwash filter according to the instructions in Section
6.2 (omit this step when first starting a new filter).
2. Turn off the pump. Switch off the circuit breaker
to the pump motor.
3. IMPORTANT: Completely open air release valve
on top of the filter tank to release all pressure
from inside the tank and system.
4. Close the filter isolation valves on the system to
prevent flooding. Remove the drain plug located at
the bottom of the filter tank and allow the tank to
drain.

Page 11Diatomaceous Earth Pool Filters - DEL Series Filter
5. Remove the tank clamp ring from the filter and remove
the tank lid. Inspect the tank o-ring for cracks or tears
and replace if necessary
6. Pull the DE filter grid assembly out of the filter tank
bottom. Use the handles molded into the manifold to
aid lifting.
7. While the DE filter grid assembly is out of the filter
tank, rinse the inside of the tank with water. Replace
drain plug.
8. Gently rinse the grids with water. After cleaning the
filter grids, place the grid assembly back into the filter
tank bottom (see Sections 6.4 and 6.5 for further grid
cleaning instructions).
9. Replace the tank o-ring and tank lid.
10. Reinstall the tank clamp ring. See Section 3.4 for tank
clamp ring installation.
5.2 Filter Grid Disassembly/Assembly
1. Remove the complete grid assembly by following
the instructions in Section 5.1, steps 2-6.
2. Remove the manifold by first unscrewing the tie
rod knob in the center of the manifold. Then lift
the manifold assembly off of the grids and the
outlet tube.
3. Remove the top spacer from the grids.
4. The individual filter grids can now be removed
from the grid support. Use care to avoid damaging
the grids.
5. See Figure 8 for the arrangement of filter grids in
the filter grid assembly.
6. To reassemble the filter grid assembly, arrange the
filter grids into position on the bottom plate (see
Fig. 8). Use the plastic top spacer to hold the grids
in place.
7. Inspect the o-ring at the top of the outlet tube for
cracks or excessive wear. Replace if necessary.
8. Assemble the manifold to the top of the assembly.
Make sure that the grids and outlet tube fit
securely into the manifold and that the retaining
rod extends up through the hole in the center of the
manifold.
9. Place the tie rod knob on the tie rod and tighten.
Tighten until the filter grid assembly is snug. Do
not overtighten.
10. Reassemble the tank o-ring and tank lid.
11. Reinstall the tank clamp ring. See Section 3.4 for
clamp installation.
Figure 8. Filter Grid Arrangement
JANDY
PN S0109500
OUTLET
PIPE WITH
O-RING
DEL
FILTER
GRID,
SHORT
SPAN
DEL FILTER GRID
(7 REQUIRED)
BOTTOM PLATE
Section 6. Maintenance
6.1 General Maintenance
1. Wash outside of filter with a mild detergent and
water. Rinse off with a hose. Do not use solvents
to clean the filter, solvents will damage the plastic
components of the filter.
2. Inspect the DE filter grids at least twice a year.
Remove any foreign material which has not been
backwashed out of the system.
3. Check pressure during operation at least once a
week.
4. Remove any debris from the pumps and pool
skimmer baskets.
5. Check pump and filter for any leaks. If any leaks
develop, turn off the pump and call a qualified
pool service technician.
6. Product safety signs or labels should be
periodically inspected and cleaned by the product
user as necessary to maintain good legibility for
safe viewing distance.
7. Product safety signs or labels should be replaced
by the product user when a person with normal
vision, including corrected vision, is no longer
able to read the safety signs or label message panel
text at a safe viewing distance from the hazard.
In cases where the product has an extensive
expected life or is exposed to extreme conditions,
the product user should contact either the product
manufacturer or some other source to determine
means for obtaining replacement signs or labels.
8. Installation of new replacement safety signs or
labels should be in accordance with the sign or
label manufacturer's recommended procedure.

Page 12
6.2 Backwashing
1. With filter pump off, set the backwash valve or
MPV handle to the "BACKWASH" position.
2. Open air release valve.
Caution
Be sure that all provisions for wastewater disposal
meet local, state or national codes. One hundred
gallons (100 gals.) or more of pool water will be
discharged during filter backwashing. Do not
discharge water where it will cause flooding or
damage.
Caution
Maintain your pressure gauge in good working order.
The pressure gauge is the primary indicator of how
the filter is operating.
3. Stand clear of the filter, start the pump to circulate
the water backwards through the filter to the waste
line.
4. When a steady stream of water is expelled through
the air release valve, close the valve.
5. Run the pump until the backwash discharge water
is clear (repeat steps 1 thru 5 if required).
6. Switch the filter pump off.
7. Follow the procedure for coating the filter grids as
described in Section 4.2.
6.3 Pressure Gauge
1. During operation of the filtration system, check
the pressure gauge/air release assembly for air or
water leaks at least once a week.
2. Keep the pressure gauge in good working order.
If you suspect a problem with the gauge, Jandy
recommends you call a qualified service technician
to do any work on the filter/pump system.
6.4 Cleaning the Filter Grids with Water
1. Turn off the pump and switch of the circuit
breaker to the pump motor. Open the air release
valve on top of the filter tank. Close the filter
isolation valves. Remove the drain plug
2. Once all pressure has been relieved, remove the
clamp ring and the filter lid. Inspect the o-ring for
cracks or tears replace if necessary.
3. Remove the filter grid assembly from the filter.
Follow instructions in Section 5.1.
4. Using a garden hose, thoroughly flush all
contaminates from the filter grid surfaces.
5. See Section 5.2 for reassembly of the filter tank
and filter grids.
6.5 Cleaning Filter Grids with Muriatic Acid
1. Check with your local pool store or service
company to see if they offer filter grid de-scaling
services.
2. Stiffening of the filter grid fabric is caused by
mineral deposit buildup. It is usually due to
deposits of either magnesium, calcium, alkalines
or carbonates. Removal of these deposits may
be accomplished by soaking the filter grids in a
plastic tub or pail with six (6) parts water to one
(1) part hydrochloric acid (muriatic acid).
WARNING
Working with muriatic acid can be dangerous. When
cleaning filter grids always wear rubber gloves and
eye protection. Add acid to water, do not add water
to acid. Splashing or spilling acid can cause severe
personal injury and/or property damage.
3. Wear rubber gloves and eye protection when
mixing the solution, and handling or rinsing the
filter grids.
4. Soak for at least four (4) hours.
5. Rinse the filter grids thoroughly with water.
6. See Sections 5.1 and 5.2 for reassembly of the
filter tank and filter grids.
Section 7. Winterizing
1. Turn off the pump and circuit breakers.
2. Open air release valve and move the MPV handle
to a position between two ports. This will allow air
to flow to all ports.
3. Remove the drain plug at the base of the filter to
ensure that the tank is empty. Store the drain plug
and seal in a safe place. Do not reinstall until next
season at start-up.
4. Drain system piping of all water.
5. Cover the system with a tarpaulin or plastic sheet
to protect it from the weather.

Page 13Diatomaceous Earth Pool Filters - DEL Series Filter
Section 8. Troubleshooting
1. For a list of common problems and solutions see
the Troubleshooting Guide below.
2. Jandy recommends that you call a qualified service
technician to do any work on the filter/pump
system. For technical service call 707.776.8200,
ext. 260.
Table 4. Troubleshooting Guide
Fault Symptom Possible Problems Solutions
Water is not clear. Insufficient disinfectant level.
Incorrect pool chemistry.
Heavy bathing and/or dirt loads.
Insufficient running times.
Filter is dirty.
Hole in filter element.
Check and adjust disinfectant level.
Test and adjust water chemistry.
Adjust filter time and/or water chemistry.
Increase pump run time.
Backwash filter per instructions.
Replace filter grids.
Low water flow. Filter system strainer baskets dirty.
Air leaks on suction side of pump.
Restrictions or blockage in either suction or
return lines.
Filter grids need to be cleaned or replaced.
Pool water level too low.
Pump not primed.
Pump impeller vanes blocked.
Pump operating under speed (low voltage).
Check and clean skimmer and pump baskets.
Check all connections between pool intake
and pump.
Check all lines for debris or partially closed
valves.
Clean or replace filter grids per instructions.
Fill pool so level is above pump inlet line.
Fill pump with water at basket and replace lid.
Technician required.
Technician or electrician required.
Short filter cycles. Presence of algae clogging filter.
Incorrect water chemistry.
Strainer baskets not being used and/or
broken. (Allow debris into pump.)
Pump output exceeds design flow rate of
filter.
Ineffective cleaning.
Check disinfectant content.
Check pH, total alkalinity and TDS.
Replace baskets.
Check pump performance.
Clean or replace filter grids per instructions.
High pressure on start-up. Small eyeball fitting in Pool/Spa.
Partially closed valve on return line.
Too large of pump.
Filter grids dirty.
Replace with larger diameter fitting.
Check and fully open all valves on return line.
Check pump and filter selection.
Clean filter grids per instructions.
Dirt returns to pool. Hole in filter grid fabric.
Worn o-ring seal inside filter.
Replace filter grid per instructions.
Replace o-ring.

Page 14
Key
No. Description
Part
No.
1 Handle Assembly w/ hardware (set of 2) R0357100
2 Handle Hardware (set of 4) R0359900
3 Gauge/Air Release Assembly R0357200
4 Pressure Gauge R0569600
5 Tank Adapter w/O-ring R0552000
6 Tank Lid DEL60 R0357300
Tank Lid DEL48 R0554700
7 Top Spacer for DE Grids R0359700
8 Spacer, DEL48/60, Large Filter R0405100
9 Breather Tube Assembly R0358700
10 Manifold Assembly R0359000
11 Tie Rod w/Knob & Lock Nuts, DEL 60 R0359300
Tie Rod w/Knob & Lock Nuts, DEL 48 R0554800
12 Tank Clamp Ring w/Knob Assembly R0357400
13 Clamp Ring Knob Assembly w/Threaded
Rod and Retainer
R0357500
14 Tank O-ring R0357800
15 Outlet Tube/Elbow Assembly w/O-rings,
DEL60
R0358100
Outlet Tube/Elbow Assembly w/O-rings,
DEL48
R0555100
16 Bulkhead Assembly w/O-ring R0358200
17 Coupling Nuts w/ Flange and O-ring
(set of 2)
R0327300
18 Inlet Elbow w/O-ring R0358400
19 Tank Bottom w/Drain Plug R0358600
20 Drain Plug w/O-ring R0358800
21 Large Tank Drain Adapter w/O-ring R0395500
22 DE Grid Support R0359500
23 DE Grid, Full Size, DEL60 (7 required) R0359100
DE Grid, Full Size, DEL48 (7 required) R0555000
24 DE Grid, Short Span, DEL60 (7 required) R0359200
DE Grid, Short Span, DEL48 (7 required) R0554900
25 Tie Rod Knob R0359400
26 Ring, Retaining R0405200
27 O-ring Replacement Kit (not shown) R0358000
28 Installation/Instruction Manual (not shown) H0238800
Section 9. Parts List and Exploded
View
9.1 Jandy®DEL Filter Parts List
9.2 Jandy®DEL Filters Exploded View
1
2
54
3
6
9
8
25
7
10
24
23
12
13
14
11
22
15
26
16
17
20
21
19
18

Page 15Diatomaceous Earth Pool Filters - DEL Series Filter
Section 10. Head Loss Curves
10.1 Jandy®DEL Filter Design Head Loss
Curves

LIMITED WARRANTY
Thank you for purchasing Jandy
®
pool and spa products. Water Pik Technologies (manufacturer of Jandy
products, including Laars
®
pool and spa heaters, Air Energy Heat Pumps, and Clormatic Electronic Chlorine
Generators) warrants all parts to be free from manufacturing defects in materials and workmanship for a period of
one year from the date of retail purchase, with the following exceptions:
•AquaLink
®
RS units installed with Jandy Surge Protection Kits will be covered for two years.
•NeverLube
®
valves are warranted for the life of pool and/or spa on which they were originally installed.
•AquaPure
TM
Electronic Chlorine Generator Electrolytic Cells carry a 5 year limited warranty on a prorated basis.
This warranty is limited to the first retail purchaser, is not transferable, and does not apply to products that have
been moved from their original installation sites. The liability of Water Pik Technologies shall not exceed the
repair or replacement of defective parts and does not include any costs for labor to remove and reinstall the
defective part, transportation to or from the factory, and any other materials required to make the repair. This
warranty does not cover failures or malfunctions resulting from the following:
1. Failure to properly install, operate or maintain the product(s) in accordance with our published Installation,
Operation and Maintenance Manuals provided with the product(s).
2. The workmanship of any installer of the product(s).
3. Not maintaining a proper chemical balance in your pool and/or spa [pH level between 7.2 and 7.8, Total
Alkalinity (TA) between 80 to 120 ppm, Total Dissolved Solids (TDS) less than 2000].
4. Abuse, alteration, accident, fire, flood, lightning, rodents, insects, negligence or acts of God.
5. Scaling, freezing, or other conditions causing inadequate water circulation.
6. Operating the product(s) at water flow rates outside the published minimum and maximum specifications.
7. Use of non-factory authorized parts or accessories in conjunction with the product(s).
8. Chemical contamination of combustion air or improper use of sanitizing chemicals, such as introducing
sanitizing chemicals upstream of the heater and cleaner hose or through the skimmer.
9. Overheating, incorrect wire runs; improper electrical supply; collateral damage caused by failure of O-Rings,
DE grids, or cartridge elements; or damage caused by running the pump with insufficient quantities of water.
LIMITATION OF LIABILITY:
This is the only warranty given by Water Pik Technologies. No one is authorized to make any other warranties on
Water Pik Technologies' behalf. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE AND MERCHANTABILITY. WATER PIK TECHNOLOGIES EXPRESSLY DISCLAIMS
AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT OR PUNITIVE
DAMAGES FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY. This warranty gives you specific
legal rights. You may also have other rights which vary by state or province.
WARRANTY CLAIMS:
For prompt warranty consideration, contact your dealer and provide the following information: proof of purchase,
model number, serial number and date of installation. The installer will contact the factory for instructions
regarding the claim and to determine the location of the nearest designated service center. If the dealer is not
available, you can locate a service center in your area by visiting www.jandy.com or by calling our technical
support department at [phone] extension 260. All returned parts must have a Returned Material
Authorization number to be evaluated under the terms of this warranty.
6000 Condor Drive • Moorpark, CA USA 93021
480 S. Service Road West • Oakville, Ontario, Canada L6K 2H4
A Water Pik Technologies Company
• 707.776.8200 • Fax [phone]
• 905.844.8233 • Fax [phone]
Litho in U.S.A. © Water Pik Technologies 0404
H0238800D