Hydrotech 6700 User Manual

#51431 Rev. 11/08

US

Read all instructions carefully before operation.

6700 Valve
Downflow

Automatic Water Softeners
Operation Manual

1

Performance and Specifications

Downflow Capacity at Various Salt Dosages Service Flow Backwash Resin Mineral Brine Brine Tank Shipping

Metered grains Rate

(2)

Flow Rate Volume Tank Size

(3)

Tank Size

(3)

Salt Capacity Weight

Model @15lb/cf @10lb/cf

(1)

@6lb/cf @3lb/cf USGPM USGPM cu. ft. inches inches Lbs. Lbs.

6700MID-844-75 22,500 18,000 12,750 9,750 8 1.5 0.75 8 x 44 18 x 33 335 70

6700MID-648-100 30,000 24,000 17,000 13,000 10 2.0 1.00 9 x 48 18 x 33 335 85
6700MID-1047-125 37,500 30,000 21,250 16,250 12 2.4 1.25 10 x 47 18 x 33 335 110
6700MID-1054-150 45,000 36,000 25,500 19,500 12 2.4 1.50 10 x 54 18 x 33 335 125
6700MID-1252-200 60,000 48,000 34,000 26,000 13 3.5 2.00 12 x 52 18 x 33 335 150
6700MID-1450-250 75,000 60,000 42,500 32,500 13 5.0 2.50 14 x 50 21 x 36 335 190

ADDITIONAL INFORMATION: Operating Temperature Range = 34° to 110°F (1° to 43°C). Operating Pressure Range = 20 to 120 psi (1.37 to 8.27 bar). The manufacturer reserves the right to make product
improvements which may deviate from the specifications and descriptions shown above, without obligation to change previously manufactured products or to note the change.

CAUTION: These products are not intended to be used to treat water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
NOTES:

(1)

10lb/cu.ft. salt dosage is the standard factory setting.

(2)

The Service Flow Rate given will not exceed a pressure drop of 15psi.

(3)

Dimensions of cylindrical tanks shown are diameter (or width) x height.

Cabinets shown as length x width x height.

How Your Water Conditioner Works

Hard water enters your home through the main supply line, enters your water conditioner, and passes down through a bed
of ion exchange resin which softens the water. An ion exchange process takes place in which the resin beads capture and
hold calcium and magnesium, the hardness impurities, while the water takes on sodium ions. The soft water then flows up
and into your household water line.

Installation Instructions

All government codes and regulations governing the installation of these devices must be observed.

CAUTION: If the ground from the electrical panel or
breaker box to the water meter or underground
copper pipe is tied to the copper water lines and
these lines are cut during installation of the Noryl
bypass valve and/or poly pipe, an approved
grounding strap must be used between the two lines
that have been cut in order to maintain continuity. The
length of the grounding strap will depend upon the
number of units being installed and/or the amount of
copper pipe being replaced with poly. See Figure 1.

In all cases where metal pipe was originally used and
is later interrupted by poly pipe or the Noryl bypass valve as in
Figure 1 or by physical separation as in Figure 2, an approved
ground clamp with no less than #6

copper conductor must be

used for continuity,

to maintain proper metallic pipe bonding.

Check your local electrical code for the correct clamp and cable
size.

Figure 2

Outside Water Line For Outside
& 3rd Tap Comes From Meter

Filtered Water Line in Home

Unfiltered Water Bypass
Loop Cut & Capped

Ground Strap Required
Because of Break in Continuity

Figure 1

Electrical Panel

Ground Strap

Poly Pipe

Ground
From
Panel

Poly Pipe

Softener
c/w Plastic Bypass

Copper Pipe

Water Meter

2

Installation Instructions Cont’d

1. Position the conditioner on a flat surface, near a drain and a 115 volt AC outlet. The unit is provided with a 24V
adapter.

2. Study the layout of the present water lines and drains in order that you can determine the best location for your water
conditioner and plan your installation. Your conditioner must not be subjected to freezing or to water temperatures
above 110°F which will void the warranty.

3. All plumbing should be done in accordance with local plumbing codes. The pipe size for the drain line should be a
minimum of 1/2”. However, a 3/4” drain line is required where backwash flow rates are in excess of 7 gpm or the
length of the drain line is greater than 20 feet.

4. Soldering joints near the drain must be done prior to connecting the drain line flow control (DLFC). Leave at least 6”
between the DLFC and the solder joints when soldering pipes that are connected on the DLFC. Failure to do this
could cause interior damage to the DLFC.

5. Teflon tape is the only sealant to be used on the drain fitting.

6. Make sure that the floor is clean and level beneath the salt storage tank.

7. Place approximately 1” of water above the grid plate. If a grid is not utilized, fill to the top of the air check in the salt
tank. Do not add salt to the brine tank at this time.

8. On units with a bypass, place in BYPASS position. Turn on the main water supply. Open a cold 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.

9. Place the bypass in the SERVICE position and let water flow into the mineral tank. When water flow stops, slowly
open a cold water tap nearby and let run until the air the air is purged from the unit.

10. Plug unit into an electrical outlet. NOTE: all electrical connections must be connected according to local codes.

Figure 3

11. Once the valve has reached the SERVICE position, normal operation is resumed. In normal operation the Time of Day
and, if flow meter equipped, Volume Remaining displays alternate being viewed. Set the Time of Day display by
depressing the Up or Down Set Button to the correct time (see Figure 3). Note: the Time of Day display must be set
correctly to either a.m. or p.m.

12. Flow Meter Equipped Valves Only - The Volume Remaining Display is the volume of water (in gallons) remaining prior to
regeneration, including any reserve capacity. Without any water usage, the Meter Arrow should be either off or on, but
not changing. Open a soft water tap. The Meter Arrow should begin flashing at a rate that varies with flow rate. Close
the tap after 3-5 gallons of water flow.

13. Plug the 24-volt transformer into a 120 VAC 60 Hz outlet. This valve has four positions: 1) Backwash

2) Brine/Rinse 3) Rapid Rinse and 4) Brine Refill. When the valve is in the Service position, the extra cycle button (far
left button as shown on Figure 4) must be pressed and held for 5 seconds before it activates. Press and hold the extra
cycle button for 5 seconds to advance the valve into the “1” Backwash position. Slowly turn on the water supply and
allow the unit to backwash until the air purges out of the tank and clears the system.

14. Press the extra cycle button to advance the valve to the “2” position. Press once more to advance to the “3” position.
Press once more to advance to the “4” Brine refill position. Wait until the water level reaches 6" in the brine tank.
Water can be added to the tank to speed up the filling but the valve should be in the Brine Refill position for a
minimum of two minutes to purge the air out of the injector set.

15. Press the extra cycle button to advance the valve from the Brine Fill position through service to the “2” position
Brine/Rinse position. Verify that water is being drawn from the tank. If not, repeat step 9.

16. Press the extra cycle button to advance the valve to the “3” Rapid Rinse position and allow water to run to drain for 2
minutes.

17. Press the extra cycle button to advance the valve to the “4” Brine Fill position until there is 6” of water in the brine
tank. Press the extra cycle button to advance the valve back into the service position indicated by the red dot in upper
left corner of the display.

18. Fill the brine tank with salt.

19. A 9V alkaline battery is recommended to be installed at all times for proper valve operation. The control will indicate

when the battery needs to be replaced by turning on the Low Battery LED.

(Installation Tip: The 6700 Softener should not be allowed to regenerate at the same time as any other water
treatment units. If adjustment is required, consult programming chart to adjust default regeneration time.)

Optional Sanitization Procedure: We recommend that all new water conditioners be disinfected as part of the startup.

Sanitization is achieved by the application of chlorine in the regeneration cycle of the conditioner. A liquid solution of

5.25% sodium hypochlorite (commonly referred to as household bleach) is recommended as a suitable disinfectant. Use

only unscented products. For every cubic foot of resin in the softener, pour approximately two (2) tablespoons of sodium
hypochlorite into the brine well tube. Press and hold the EXTRA CYCLE button and allow the brine tank to fill with the
standard amount of water. Press the EXTRA CYCLE button again twice to advance the valve to the Brine/Rinse position.
Allow softener to complete the Brine/Rinse cycle, then press EXTRA CYCLE button three times to advance valve back to
service position.

3

4

Operating Instructions

Water Pressure

Your conditioner is designed to operate under normal water pressures from 20 psi to 100 psi.

Regeneration and Automatic Bypass

Water conditioners are factory set to regenerate at 12:00 a.m. during a period of little or no water use. The regeneration
cycle lasts approximately two hours, after which soft water service is restored. While regeneration is taking place, hard
water automatically bypasses the water conditioner if required. Use of water, particularly hot water, should be avoided at
this time to prevent hard water from filling the water heater.

New Sounds

You will notice new sounds as your conditioner operates, such as the hum of the timer or click of the actuator arm. During
regeneration, it will be common to hear the sounds of water running to the drain.

Manual Bypass (Figure 4)

In case of an emergency such as an overflowing brine tank, you can
isolate your water softener from the water supply using the bypass
valve located at the back of the control.

In normal operation the bypass is open with the ON/OFF knobs in
line with the INLET and OUTLET pipes. To isolate the softener,
simply rotate the knobs clockwise (as indicated by the word BYPASS
and arrow) until they lock.
You can use your water related fixtures and appliances as the water
supply is bypassing the softener. However, the water you use will be
hard.

To resume soft water service, open the bypass valve by rotating the
knobs counter-clockwise.

Keypad Operation

Extra Cycle Button

Pushing this button will initiate a regeneration cycle independently of actual valve conditions.
With immediate regeneration valves, this regeneration would occur immediately. With delayed regeneration valves, this
extra regeneration would occur at the pre-set regeneration time. A regeneration cycle can be forced to occur immediately
by pushing and holding the button for 5 seconds.

Program Button

This button is used by the installer to program those settings indicate on the front panel by red LEDs.

Up Set Button

This button is used to set the current time of day, adjust time remaining in a regeneration cycle step and in valve
programming. The Up Arrow Button will increment a display setting.

Down Set Button

This button is used to set the current time of day, adjust time remaining in a regeneration cycle step and in valve
programming. The Down Arrow Button will decrement a display setting.

Low Battery Indicator

When the control is operating on line power, this red LED will turn on whenever the 9V alkaline battery used for memory
back-up needs to be replaced. The battery is stored inside the top cover. In the event of a power outage, the battery will
maintain current operating data for approximately 25 hours at maximum battery capacity.

OUTLET

INLET

Figure 4

Maintenance Instructions

Checking the Salt Level

Check the salt level monthly. Remove the lid from the cabinet or brine tank, make sure salt level is always above the brine
level (you should not be able to see water).

Adding Salt

Use only clean salt labeled for water conditioner use, such as crystal, pellet, nugget, button or solar.

The use of rock salt is discouraged because it contains insoluble silt and sand which build up in the brine tank and can
cause problems with the system’s operation.

Add the salt directly to the tank, filling no higher than the top of the brine well.

Caution

Liquid brine will irritate eyes, skin and open wounds - gently wash exposed area with fresh water. Keep children away
from your water conditioner.

Resin Cleaner

An approved resin cleaner must be used on a regular basis if your water supply contains iron. The amount of resin
cleaner and frequency of use is determined by the quantity of iron in your water (consult your local representative or follow
the directions on the resin cleaner package).

Care of Your Water Conditioner

To retain the attractive appearance of your new water conditioner, clean occasionally with a mild soap solution. Do no use
abrasive cleaners, ammonia or solvents. Never subject your conditioner to freezing.

Bridging (Figure 5)

Humidity or the wrong type of salt may create a cavity between the water and the
salt. This action, known as “bridging”, prevents the brine solution from being made,
leading to your water supply being hard.

If you suspect salt bridging, carefully pound on the outside of the plastic brine tank
or pour some warm water over the salt to break up the bridge. This should always
be followed up by allowing the unit to use up any remaining salt and then thoroughly
cleaning out the brine tank. Allow four hours to produce a brine solution, then
manually regenerate the softener.

Figure 5

5

Cleaning The Injector Assembly (Figure 6)

Sediment, sand and silt will restrict or clog the injector. A clean water supply and pure salt will prevent this from
happening.

The injector assembly is located on the left side of the control valve. This assembly is easy to clean.

Shut off the water supply to your water conditioner and reduce the
pressure by opening a cold soft water faucet. Using a screwdriver,
remove the two screws holding the injector assembly to the control
valve body. Carefully remove the assembly and disassemble as shown
in Figure 6. The injector orifice is removed from the injector body by
carefully turning it out with a screwdriver. Remove the injector throat
the same way. Carefully flush all parts with water. Use a mild acid such
as vinegar or Pro-Rust Out to clean the small holes in the orifice and
throat. Reassemble using the reverse procedure.
Do not over tighten.

6

Trouble Shooting Guide

1. CONDITIONER DELIVERS HARD WATER

A. Bypass valve is open A. Close bypass valve
B. No salt in brine tank B. Add salt to brine tank and maintain salt level above water level
C. Injector or screen plugged C. Replace injectors and screen
D. Insufficient water flowing into brine tank D. Check brine tank fill time and clean brine line flow tank control if plugged
E. Hot water tank hardness E. Repeated flushing of the hot water tank is required
F. Leak at distributor tube F. Make sure distributor tube is not cracked. Check O ring and tube pilot
G. Internal valve leak G. Replace seals and spacers and/or piston
H. Flow meter jammed H. Remove obstruction from flow meter
I. Flow meter cable disconnected or not plugged I. Check meter cable connection to timer and meter cap into meter cap
J. Improper programming J. Re-program the control to the proper regeneration type, inlet water hardness,

capacity or flow meter size.

2. CONDITIONER FAILS TO REGENERATE

A. Electrical service to unit has been interrupted A. Assure permanent electrical service (check fuse, plug, chain or switch)
B. Timer is not operating properly B. Replace timer
C. Defective valve drive motor C. Replace drive motor
D. Improper programming D. Check programming and reset as needed

3. UNIT USES TOO MUCH SALT

A. Improper salt setting A. Check salt usage and salt setting
B. Excessive water in brine tank B. See #7
C. Improper programming C. Check programming and reset as needed

4. LOSS OF WATER PRESSURE

A. Iron build-up in line to water conditioner A. Clean line to water conditioner
B. Iron build-up in water conditioner B. Clean control and add resin cleaner to resin bed. Increase frequency

of regeneration

C. Inlet of control plugged due to foreign material C. Remove piston and clean control

broken loose from pipes by recent work done on
plumbing system

INJECTOR BODY

INJECTOR THROAT

INJECTOR NOZZLE

“O” RING

INJECTOR COVER

INJECTOR SCREEN

SCREW

Figure 6

7

5. LOSS OF RESIN THROUGH DRAIN LINE

A. Air in water system A. Assure that well system has proper air eliminator control. Check for dry well

condition.

B. Drain line flow control is too large B. Ensure drain line flow control is sized

6. IRON IN CONDITIONED WATER

A. Fouled resin bed A. Check backwash, brine draw and brine tank fill. Increase frequency of

regeneration. Increase backwash time.

B. Iron content exceeds recommended parameters B. Add iron removal filter system

7. EXCESSIVE WATER IN BRINE TANK

A. Plugged drain line flow control A. Clean flow control
B. Brine valve failure B. Replace brine valve
C. Improper programming C. Check programming and reset as needed

8. SALT WATER IN SERVICE LINE

A. Plugged injector system A. Clean injector and replace screen
B. Timer not operating properly B. Replace timer
C. Foreign material in brine valve C. Clean or replace brine valve
D. Foreign material in brine line flow control D. Clean brine line flow control
E. Low water pressure E. Raise water pressure
F. Improper programming F. Check programming and reset as needed

9. CONDITIONER FAILS TO DRAW BRINE

A. Drain line flow control is plugged A. Clean drain line flow control
B. Injector is plugged B. Clean or replace injectors
C. Injector screen is plugged C. Replace screen
D. Line pressure is too low D. Increase line pressure (line pressure must be at least 20 psi at all times)
E. Internal control leak E. Change seals and spacers and/or piston assembly
F. Improper programming F. Check programming and reset as needed
G. Timer not operating properly G. Replace timer

10. CONTROL CYCLES CONTINUOUSLY

Timer not operating properly A. Replace timer
Faulty microswitches and/or harness B. Replace faulty microswitch or harness
Faulty cycle cam operation C. Replace cycle cam or reinstall

11. DRAIN FLOWS CONTINUOUSLY

A. Foreign material in control A. Remove piston assembly and inspect bore. Remove foreign material and check

control in various regeneration positions
B. Internal control leak B. Replace seals and/or piston assembly
C. Control valve jammed in brine or backwash position C. Replace piston and seals and spacers
D. Timer motor stopped or jammed teeth D. Replace timer motor and check all gears for missing teeth
E. Timer not operating properly E. Replace timer

Trouble Shooting Guide

GGUUAARRAANNTTEEEE

HYDROTECH guarantees that your new water conditioner is built of quality material and workmanship. When properly
installed and maintained, it will give years of trouble-free service.

FIVE YEAR COMPLETE PARTS GUARANTEE

HYDROTECH will replace any part which fails within 60 months from date of manufacture, provided the failure is due to a

defect in material or workmanship. The only exception shall be when proof of purchase or installation is provided and then
the warranty period shall be from the date thereof.

TEN YEAR GUARANTEE ON MINERAL AND BRINE TANKS

HYDROTECH will provide a replacement mineral or brine tank to any original equipment purchaser in possession of a tank

that fails within 120 months, provided that the water conditioner is at all times operated in accordance with specifications
and not subject to freezing or exposure to direct sunlight.

GENERAL PROVISIONS

HYDROTECH assumes no responsibility for consequential damage as a result of escaped water from the water filter; labor

or expense incurred as a result of a defect or for failure to meet the terms of these guarantees because of circumstances
beyond its control.

WaterGroup Inc. Regina, Saskatchewan
Fridley, Minnesota Cambridge, Ontario
Durham, North Carolina Calgary, Alberta
1-800-354-7867 1-877-299-5999

www.hydrotechwater.com