Pentair FLECK 2750 Downflow User manual

Model 2750 Downflow
Service Manual
IMPORTANT: Fill in Pertinent Information on Page 3 for Future Reference

Job Specification Sheet......................................................................................................................................... 3
Installation Instructions.......................................................................................................................................... 4
Start-Up Instructions.............................................................................................................................................. 5
3200 Timer Setting Procedure............................................................................................................................... 6
3210 Timer Setting Procedure............................................................................................................................... 7
3200 & 3210 Regeneration Cycle Setting Procedure............................................................................................ 8
3200 Timer Assembly .......................................................................................................................................... 10
3210 Timer Assembly .......................................................................................................................................... 12
Powerhead Assembly (Designer) ........................................................................................................................ 14
Environmental Powerhead Assembly .................................................................................................................. 16
Manual Powerhead Assembly ............................................................................................................................. 18
Control Valve with 1700 Injector .......................................................................................................................... 20
1600 Series Brine System Assembly................................................................................................................... 22
1650 Brine System Assembly.............................................................................................................................. 23
1700 Series Brine System Assembly................................................................................................................... 24
1710 Brine System Assembly.............................................................................................................................. 26
1” Meter Assembly............................................................................................................................................... 27
1600 Service Valve Operator (Old Style)............................................................................................................. 28
1600 Service Valve Operation (New Style) ......................................................................................................... 29
2310 Safety Brine Valve ...................................................................................................................................... 30
Troubleshooting................................................................................................................................................... 32
General Service Hints for Meter Control.............................................................................................................. 33
Water Conditioner Flow Diagrams....................................................................................................................... 34
Flow Data & Injector Draw Rates ........................................................................................................................ 36
System #4 Typical Tank Installation with Optional Meter..................................................................................... 37
System #5 Interlock Typical Twin Tank Installation with Optional 2 Meter Interlock and No Hard Water Bypass ...... 37
System #6 Twin Series Regeneration Installation with a Remote Meter ............................................................. 38
System #7 Twin Alternator Installation with a Remote Meter .............................................................................. 38
System #4 Immediate Delayed Valve Wiring....................................................................................................... 39
System #4 Remote Signal Start Valve Wiring ..................................................................................................... 40
System #5 Duplex Valve Wiring .......................................................................................................................... 41
System #6 Duplex Valve Wiring .......................................................................................................................... 42
System #7 Duplex 24V/120V 3-Way Valve Wiring .............................................................................................. 43
System #7 Duplex 230V 3-Way Valve Wiring...................................................................................................... 44
Service Assemblies ............................................................................................................................................. 45
Table of Contents
IMPORTANT PLEASE READ:
The information, specifications and illustrations in this manual are based on the latest information available at the time of•
printing. The manufacturer reserves the right to make changes at any time without notice.
This manual is intended as a guide for service of the valve only. System installation requires information from a number of•
suppliers not known at the time of manufacture. This product should be installed by a plumbing professional.
This unit is designed to be installed on potable water systems only.•
This product must be installed in compliance with all state and municipal plumbing and electrical codes. Permits may be•
required at the time of installation.
If daytime operating pressure exceeds 80 psi (5.5 bar), nighttime pressures may exceed pressure limits. A pressure reducing•
valve must be installed.
Do not install the unit where temperatures may drop below 32°F (0°C) or above 110°F (43°C).•
Do not place the unit in direct sunlight. Black units will absorb radiant heat increasing internal temperatures.•
Do not strike the valve or any of the components.•
Warranty of this product extends to manufacturing defects. Misapplication of this product may result in failure to properly•
condition water, or damage to product.
A prefilter should be used on installations in which free solids are present.•
In some applications local municipalities treat water with Chloramines. High Chloramine levels may damage valve components.•
Correct and constant voltage must be supplied to the control valve to maintain proper function.•

Job Number: __________________
Model Number: ________________
Water Hardness: ___________________ ppm or gpg
Capacity Per Unit: ______________
Mineral Tank Size: ___________ Diameter: ___________ Height:
Salt Setting per Regeneration: _____________________________________________
1. Type of Timer:
A. 7 Day or 12 Day B. Meter Initiated
2. Downflow: Upflow Upflow Variable
3. Meter Size:
A. 3/4” Std Range (125 - 2,100 gallon setting)
B. 3/4” Ext Range (625 - 10,625 gallon setting)
C. 1” Std Range (310 - 5,270 gallon setting)
D. 1” Ext Range (1,150 - 26,350 gallon setting)
E. 1-1/2” Std Range (625 - 10,625 gallon setting)
F. 1-1/2” Ext Range (3,125 - 53,125 gallon setting)
G. 2” Std Range (1,250 - 21,250 gallon setting)
H. 2” Ext Range (6,250 - 106,250 gallon setting)
I. 3” Std Range (3,750 - 63,750 gallon setting)
J. 3” Ext Range (18,750 - 318,750 gallon setting)
K. Electronic________ Pulse Count ________ Meter Size
4. System Type:
A. System #4: 1 Tank, 1 Meter, Immediate, or Delayed Regeneration
B. System #4: Time Clock
C. System #4: Twin Tank
D. System #5: 2-5 Tanks, 2 Meters, Interlock
E. System #6: 2-5 Tanks, 1 Meter, Series Regeneration
F. System #7: 2-5 Tanks, 1 Meter, Alternating
G. System #9: Electronic Only, 2-4 Tanks, Meter per Valve, Alternating
H. System #14: Electronic Only, 2-4 Tanks, Meter per Valve. Brings units on and offline based on flow.
5. Timer Program Settings:
A. Backwash: ______________________ Minutes
B. Brine and Slow Rinse: _____________ Minutes
C. Rapid Rinse: ____________________ Minutes
D. Brine Tank Refill: _________________ Minutes
E. Pause Time: ____________________ Minutes
F. Second Backwash: _______________ Minutes
6. Drain Line Flow Control: ____________ gpm
7. Brine Line Flow Controller: __________________ gpm
8. Injector Size#: _____________________
9. Piston Type:
A. Hard Water Bypass
B. No Hard Water Bypass
Job Specification Sheet

Page 4
Installation Instructions
WATER PRESSURE: A minimum of 20 pounds of water pressure (1.4 bar) is required for regeneration valve to operate
effectively.
ELECTRICAL FACILITIES: An uninterrupted alternating current (A/C) supply is required. Note: Other voltages are available.
Please make sure your voltage supply is compatible with your unit before installation.
EXISTING PLUMBING: Condition of existing plumbing should be free from lime and iron buildup. Piping that is built up heavily
with lime and/or iron should be replaced. If piping is clogged with iron, a separate iron filter unit should be installed ahead of
the water softener.
LOCATION OF SOFTENER AND DRAIN: The softener should be located close to a drain to prevent air breaks and back flow.
BY-PASS VALVES: Always provide for the installation of a by-pass valve if unit is not equipped with one.
CAUTION: Water pressure is not to exceed 125 psi (8.6 bar), water temperature is not to exceed 110°F (43°C), and the unit
cannot be subjected to freezing conditions.
Installation Instructions
Place the softener tank where you want to install the unit making sure the unit is level and on a firm base.1.
During cold weather, the installer should warm the valve to room temperature before operating.2.
All plumbing should be done in accordance with local plumbing codes. The pipe size for residential drain line should be a3.
minimum of 1/2” (13 mm). Backwash flow rates in excess of 7 gpm (26.4 Lpm) or length in excess of 20’ (6 m) require
3/4” (19 mm) drain line. Commercial drain lines should be the same size as the drain line flow control.
Refer to the dimensional drawing for cutting height of the distributor tube. If there is no dimensional drawing, cut the4.
distributor tube flush with the top of the tank.
Lubricate the distributor O-ring seal and tank O-ring seal. Place the main control valve on tank.5.
Note: Only use silicone lubricant.
Solder joints near the drain must be done prior to connecting the Drain Line Flow Control fitting6.
(DLFC). Leave at least 6” (15 cm) between the DLFC and solder joints when soldering pipes
that are connected on the DLFC. Failure to do this could cause interior damage to the DLFC.
Teflon tape is the only sealant to be used on the drain fitting. The drain from twin tank units may7.
be run through a common line.
Make sure that the floor is clean beneath the salt storage tank and that it is level.8.
Place approximately 1” (25 mm) of water above the grid plate. If a grid is not utilized, fill to the9.
top of the air check (Figure 1) in the salt tank. Do not add salt to the brine tank at this time.
On units with a by-pass, place in by-pass position. Turn on the main water supply. Open a cold10.
soft water tap nearby and let run a few minutes or until the system is free from foreign material
(usually solder) that may have resulted from the installation. Once clean, close the water tap.
Slowly place the by-pass in service position and let water flow into the mineral tank. When water11.
flow stops, slowly open a cold water tap nearby and let run until the air is purged from the unit.
Plug unit into an electrical outlet. Note: All electrical connections must be connected according12.
to local codes. (Be certain the outlet is uninterrupted).
60002-34REVC
Figure 1 Residential
Air Check Valve

Page 5
Start-Up Instructions
The water softener should be installed with the inlet, outlet, and drain connections made in accordance with the
manufacturer’s recommendations, and to meet applicable plumbing codes.
Turn the manual regeneraton knob slowly in a clockwise direction until the program micro switch lifts on top of1.
the first set of pins. Allow the drive motor to move the piston to the first regeneration step and stop. Each time
the program switch position changes, the valve will advance to the next regeneration step. Always allow the
motor to stop before moving to the next set of pins or spaces.
NOTE: For electronic valves, please refer to the manual regeneration part of the timer operation
section. If the valve came with a separate electronic timer service manual, refer to the timer operation
section of the electronic timer service manual.
Position the valve to backwash. Ensure the drain line flow remains steady for 10 minutes or until the water2.
runs clear (see above).
Position the valve to the brine / slow rinse position. Ensure the unit is drawing water from the brine tank. This3.
step may need to be repeated.
Position the valve to the rapid rinse position. Check the drain line flow, and run for 5 minutes or until the water4.
runs clear.
Position the valve to the start of the brine tank fill cycle. Ensure water goes into the brine tank at the desired5.
rate. The brine valve drive cam will hold the valve in this position to fill the brine tank for the first regeneration.
Replace control box cover.6.
Put salt in the brine tank.7.
NOTE: Do not use granulated or rock salt.

Page 6
3200 Timer Setting Procedure
How To Set Days On Which Water Conditioner Is To
Regenerate (Figure 2):
Rotate the skipper wheel until the number “1” is at the
red pointer. Set the days that regeneration is to occur
by sliding tabs on the skipper wheel outward to expose
trip fingers. Each tab is one day. Finger at red pointer is
tonight. Moving clockwise from the red pointer, extend
or retract fingers to obtain the desired regeneration
schedule.
How To Set The Time Of Day:
1. Press and hold the red button in to disengage the
drive gear.
2. Turn the large gear until the actual time of day is at
the time of day pointer.
3. Release the red button to again engage the drive
gear.
How To Manually Regenerate Your Water
Conditioner At Any Time:
1. Turn the manual regeneration knob clockwise.
2. This slight movement of the manual regeneration
knob engages the program wheel and starts the
regeneration program.
3. The black center knob will make one revolution in
the following approximately three hours and stop in
the position shown in the drawing.
4. Even though it takes three hours for this center knob
to complete one revolution, the regeneration cycle of
your unit might be set only one half of this time.
5. In any event, conditioned water may be drawn after
rinse water stops flowing from the water
conditioner drain line.
How to Adjust Regeneration Time:
1. Disconnect the power source.
2. Locate the three screws behind the manual
regeneration knob by pushing the red button in and
rotating the 24 hour dial until each screw appears in
the cut out portion of the manual regeneration knob.
3. Loosen each screw slightly to release the pressure
on the time plate from the 24 hour gear.
4. Locate the regeneration time pointer on the inside
of the 24 hour dial in the cut out.
5. Turn the time plate so the desired regeneration time
aligns next to the raised arrow.
6. Push the red button in and rotate the 24 hour dial.
Tighten each of the three screws.
7. Push the red button and locate the pointer one more
time to ensure the desired regeneration time
is correct.
8. Reset the time of day and restore power to the unit. Figure 2
61502_3200REVA

Page 7
3210 Timer Setting Procedure
Typical Programming Procedure
Calculate the gallon capacity of the system, subtract
the necessary reserve requirement and set the gallons
available opposite the small white dot on the program
wheel gear (Figure 3).
NOTE: Drawing shows 8,750 gallon setting. The
capacity (gallons) arrow shows zero gallons remaining.
The unit will regenerate tonight at the set regeneration
time.
How To Set The Time Of Day:
Press and hold the red button in to disengage the1.
drive gear.
Turn the large gear until the actual time of day is2.
opposite the time of day pointer.
Release the red button to again engage the drive3.
gear.
How To Manually Regenerate Your Water
Conditioner At Any Time:
Turn the manual regeneration knob clockwise.1.
This slight movement of the manual regeneration2.
knob engages the program wheel and starts the
regeneration program.
The black center knob will make one revolution in the
following approximately three hours and stop in the
position shown in the drawing.
Even though it takes three hours for this center3.
knob to complete one revolution, the regeneration
cycle of your unit might be set for only one half of
this time.
In any event, conditioned water may be drawn after4.
rinse water stops flowing from the water conditioner
drain line.
Immediate Regeneration Timers:
These timers do not have a 24 hour gear. Setting the
gallons on the program wheel and manual regeneration
procedure are the same as previous instructions. The
timer will regenerate as soon as the capacity gallons
reaches zero.
NOTE:
The program wheel to the
left may be different than the
program wheel on the product.
NOTE:
To set meter capacity rotate
manual knob one - 360°
revolution to set gallonage.
Figure 3 61502_3200REVA

Page 8
3200 & 3210 Regeneration Cycle Setting Procedure
How To Set The Regeneration Cycle Program:
The regeneration cycle program on your water
conditioner has been factory preset, however,
portions of the cycle or program may be lengthened or
shortened in time to suit local conditions.
3200 & 3210 Series Timers (Figure 4)
To expose cycle program wheel, grasp timer in1.
upper left-hand corner and pull, releasing snap
retainer and swinging timer to the right.
To change the regeneration cycle program, the2.
program wheel must be removed. Grasp program
wheel and squeeze protruding lugs toward center,
lift program wheel off timer. Switch arms may
require movement to facilitate removal.
Return timer to closed position engaging snap3.
retainer in back plate. Make certain all electrical
wires locate above snap retainer post.
Timer Setting Procedure for 3200 & 3210
Timer
How To Change The Length Of The Backwash
Time:
The program wheel as shown in the drawing is in the
service position. As you look at the numbered side of
the program wheel, the group of pins starting at zero
determines the length of time your unit will backwash.
EXAMPLE: If there are six pins in this section, the time
of backwash will be 12 min (2 min. per pin). To change
the length of backwash time, add or remove pins as
required. The number of pins times two equals the
backwash time in minutes.
How To Change The Length Of Brine And Rinse
Time:
The group of holes between the last pin in the1.
backwash section and the second group of pins
determines the length of time that your unit will
brine and rinse (2 min. per hole).
To change the length of brine and rinse time, move2.
the rapid rinse group of pins to give more or fewer
holes in the brine and rinse section. Number of
holes times two equals brine and rinse time in
minutes.
How To Change The Length Of Rapid Rinse:
The second group of pins on the program wheel1.
determines the length of time that your water
conditioner will rapid rinse (2 min. per pin).
To change the length of rapid rinse time, add or2.
remove pins at the higher numbered end of this
section as required. The number of pins times two
equals the rapid rinse time in minutes.
How To Change The Length Of Brine Tank Refill
Time:
The second group of holes in the program wheel1.
determines the length of time that your water
conditioner will refill the brine tank (2 min. per hole).
To change the length of refill time, move the two2.
pins at the end of the second group of holes as
required.
The regeneration cycle is complete when the outer3.
microswitch is tripped by the two pin set at end of
the brine tank refill section.
The program wheel, however, will continue to rotate4.
until the inner micro-switch drops into the notch on
the program wheel.
Figure 4
61502_3210REVA

Page 9
Notes

Page 10
3200 Timer Assembly
61502-3200_REVA
For Service Assembly Numbers, See the Back of this Manual