Rain Soft EC4 SERIES User manual

The EC4 series is tested and certified by the WQA to NSF/ANSI 44 for the specific
performance claims as verified and substantiated by test data. See the performance
data sheet for specific reduction claims.
The EC4 series is tested and certified by WQA to NSF/ANSI 372 for “lead free”
compliance. The EC4 series is tested and certified by WQA to CSA B483.1 Standard.
Part No.: 50038
Rev: B 10/20
Rainsoft Division of Aquion, Inc
101 S. Gary Ave
Roselle, Illinois 60172
1.847.437.9400 or 1.800.860.7638
www.rainsoft.com
is product is manufactured in an ISO 9001certified facility.
CU
S
The EC4 series is tested and certified by NSF International to
NSF/ANSI Standard 44 and CSA B483.1 for the reduction of
the claims specified on the Performance Data Sheet.
EC4 SERIES
WATER TREATMENT SYSTEM
GENERATION 6 OF CONTROLS

2
Table of Contents
Information on Water Treatment Systems................................................ 3
Application Limitations ................................................................................ 3
Operational Specifications....................................................................... 4_6
Product Certification Information .............................................................. 7
Installation Instructions......................................................................... 8_13
System Start Up............................................................................................ 13
Salt Requirements ........................................................................................ 15
Maintenance Requirements........................................................................ 15
An Overview of the Regeneration Process..........................................16-17
EC4 Display / Home Screen ....................................................................... 17
Customer Setting Flow Chart..................................................................... 18
Customer Settings.................................................................................. 19-20
How to Initiate a Manual Regeneration ................................................... 20
System Alarms.............................................................................................. 21
Info Center.................................................................................................... 21
Exploded Views and Parts Lists........................................................... 22-25
Troubleshooting Guide ............................................................................... 26
California Performance Data Sheets .................................................. 27–29
Warranty Information................................................................................. 30

3
Congratulations on your purchase of a RainSoft water treatment
system.
This Owner’s Manual is designed to assist with the operation,
maintenance, and installation of your water treatment system. It is
our sincere hope that this manual is clear, concise, and helpful to you
as a new owner.
Questions? If you have any questions regarding the installation,
operation, or servicing of this system, please contact your local
RainSoft Dealer. Your local RainSoft Dealer is familiar with your
particular water conditions, and is able to address your concerns
promptly and efficiently.
Information on Water Treatment
Systems
There are many misconceptions that have been developed about
water treatment systems. The most common topic of confusion is the
amount of sodium (Na), not table salt (NaCl), that is added to the
water from a water conditioner. In reality, ion exchange does replace
the hardness ions in your water with sodium ions, but the common
misconception is the amount used.
For every 1 grain of hardness, the exchange process will deliver
approximately 8 milligrams of sodium per 1 liter of water. The
amount of sodium present in a standard 8 ounce glass of treated
water, that was 10 grains hard prior to treatment, would be around
19 milligrams of sodium. This is an insignificant amount of sodium
considering a typical slice of white bread has about 140 milligrams.
Another common misconception that needs mentioning is the
amount of salt used by the conditioner to regenerate the system. In the
past, water conditioners used more salt to regenerate, but that was due
to old technology and standards. Water conditioners do use salt for
regeneration, but the amount of salt varies by water consumption and
hardness levels. Fortunately, today’s technology allows us to dispense
just the right amount of salt for maximum efficiency, based on your
individual water consumption needs.
Application Limitations
On hardness levels of 60 grains and higher, the system may not
achieve a hardness of less than 1 grain; due to high Total Dissolved
Solids, some bleed through is possible. Bleed through can also
becaused by sodium levels higher than 1000 parts per million. In
either case, your system can be programmed to minimize these effects.
See your RainSoft Dealer for details.
Chlorine or Chloramine levels on municipality treated water should
not exceed 4 parts per million.*When Chlorine or Chloramine levels
are 4 parts per million*or greater, it can have adverse effects on your
system. In applications where high levels are a concern, pre-filtration
is necessary to reduce the Chlorine or Chloramine to an acceptable
level. See your RainSoft Dealer for details.
When this system is installed on water with Ferrous iron, also known
as clear water iron, the maximum range of removal is based on local
water conditions. The range is generally 2 to 10 parts per million.Your
equipment may require special programming, alongwith an additive
to the brine tank, to maximize the equipment’s ability to remove iron.
See your RainSoft Dealer for details.
!
Important Note: Iron fouled
resin is not eligible for warranty
replacement.
!
Important Note: This system
may be installed on well water
or municipality treated water
supplies.
!
Important Note: Most municipality
treated water supplies contain
Chlorine as a disinfectant.
Many municipalities also inject
ammonia into the water supply,
creating Chloramine.
Maximum disinfectant level
of Chlorine or Chloramine
recommended from the EPA.
*
Helpful Tip: Another common
misconception of water treatment
systems is the idea that soft
water will produce clear ice
cubes. Cloudy or white, hazy ice
cubes are caused by air that is
slowly being released from the
water during the freezing process,
which has nothing to do with the
performance of your system.

4
Operational Specifications
Plumbing
3/4 inch to 1 1/4 inch I.D.
Drain Line
1/2 inch I.D.
Water Pressure
20 psi_120 psi (1.38 bar _6.89 bar)
Operating Temperatures
40° F_100° F (4.4° C _37.8° C)
Electrical Requirements
A properly grounded alternating current supply (110 VAC 60 Hz or 230
VAC 50 Hz) is required for the operation of this system. Please check the
power supply for the correct voltage requirements.
Bypass Valve
The bypass valve enables you to bypass the system in situations of
emergency leaks in the equipment, service calls.
Existing Plumbing Conditions
Plumbing should be free from lime and/or iron buildup. Piping that
contains large amounts of lime and/or iron should be replaced.
Additional Specifications
• Do not install this system where water is microbiologically unsafe
or of unknown quality without adequate disinfection before or after
the system.
• This system must be installed in accordance with all applicable state
and local laws and regulations.
• The Commonwealth of Massachusetts Plumbing Code 248 CMR
shall be adhered to. A licensed plumber shall be used for this
installation.
• This system must be installed in an area not affected by extreme
heat, cold or the elements. The selected installation area must be
adequate for easy service and accessibility.
• This system is designed to treat cold water only. The installation
must be on a cold water supply.
!
Important Note: This system
requires the use of the included
power supply (24 VDC).
!
Important Note: The manually
operated bypass valve enables
the conditioner to be isolated
from the water service line for
maintenance and service. It
also maintains the continuity
of the water supply when the
conditioner is disconnected.

Data Chart for ION-X 2000 V Resin
5
*The conditioners are efficiency
rated according to NSF/ANSI 44.
The efficiency of the conditioner
is valid only at the stated salt
dosage.
Higher or lower pressure will
affect the efficiency of the system.
†
Only the following models are
certified in the State of California:
EC4 75 CV, EC4 100 CV, EC4
150 CV. All other models are not
certified in the State of California
for the purpose of making health
claims.
Model
Tank
Size
(inches)
Cation
Exchange
Resin
(cu. ft.)
Max.
Service
Flow
(gpm)
Drain
Flow
(gpm)
psi Drop High
Salting
Medium
Salting
Low
Salting Efficiency*
EC4 50 V 8 x 44 0.5 10 1.5 14.0 17,400 
7.5 lbs.
14,200 
5.0 lbs.
6,600 
1.5 lbs.
4,400 
1.5 lbs.
EC4 50 CV 8 x 44 0.5 10 1.5 13.0 17,400 
7.5 lbs
14,200 
5.0 lbs.
6,600 
1.5 lbs.
4,400 
1.5 lbs.
EC4 50SS V 10 x 18 0.5 9.5 1.5 9.0 17,400 
7.5 lbs.
14,200 
5.0 lbs.
6,600 
1.5 lbs.
4,400 
1.5 lbs.
EC4 50SS CV 10 x 18 0.5 9.5 1.5 8.0 17,400 
7.5 lbs.
14,200 
5.0 lbs.
6,600 
1.5lbs.
4,400 
1.5 lbs.
EC4 60S V 10 x 35 0.6 9.5 2.0 9.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200 
1.8 lbs.
4,010 
1.8 lbs.
EC4 60S CV 10 x 35 0.6 9.5 2.0 8.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200 
1.8 lbs.
4,010 
1.8 lbs.
EC4 75 V 8 x 44 0.75 8.6 1.5 15.0 26,100 
11.2 lbs.
21,300 
7.5 lbs.
9,900 
2.25 lbs.
4,400 
2.25 lbs.
EC4 75 CV†8 x 44 0.75 9.2 1.5 15.0 26,100 
11.2 lbs.
21,300 
7.5 lbs.
9,900 
2.25 lbs.
4,400 
2.25 lbs.
EC4 100 V 10 x 44 1.0 10.0 2.0 10.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.
EC4 100 CV†10 x 44 1.0 10.0 2.0 11.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.
EC4 100S V 10 x 35 1.0 10.0 2.0 10.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.
EC4 100S CV 10 x 35 1.0 10.0 2.0 11.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.
EC4 150 V 10 x 54 1.5 9.0 2.0 10.0 51,800 
22.5 lbs.
45,800 
15.0 lbs.
21,400 
4.5 lbs.
4,750 
4.5 lbs.
EC4 150 CV†10 x 54 1.5 10.4 2.0 15.0 51,800 
22.5 lbs.
45,800 
15.0 lbs.
21,400 
4.5 lbs.
4,750 
4.5 lbs.
EC4 250 V 13 x 54 2.5 10.4 3.0 10.0 86,300 
37.5 lbs.
76,400 
25.0 lbs.
35,600 
7.5 lbs.
4,750 
7.5 lbs.
EC4 250 CV 13 x 54 2.5 10.5 3.0 12.0 86,300 
37.5 lbs.
76,400 
25.0 lbs.
35,600 
7.5 lbs.
4,750 
7.5 lbs.
EC4 400 V 14 x 65 4.0 10.0 4.0 10.0 138,100 
60.0 lbs.
122,200 
40.0 lbs.
57,000 
12.0 lbs.
4,750 
12.0 lbs.
EC4 400 CV 14 x 65 4.0 11.3 4.0 14.0 138,100 
60.0 lbs.
122,200 
40.0 lbs.
57,000 
12.0 lbs.
4,750 
12.0 lbs.
EC4CAB 50SS V 10 x 18 0.5 9.5 2.0 9.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200 
1.8 lbs.
4,010 
1.8 lbs.
EC4CAB 50SS CV 10 x 18 0.5 9.5 2.0 8.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200 
1.8 lbs.
4,010 
1.8 lbs.
EC4CAB 60 V10 x 35 0.6 9.5 2.0 9.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200
 1.8 lbs.
4,010 
1.8 lbs.
EC4CAB 60 CV 10 x 35 0.6 9.5 2.0 8.0 19,000 
9.0 lbs.
15,500 
6.0 lbs.
7,200
 1.8 lbs.
4,010 
1.8 lbs.
EC4CAB 100 V10 x 35 1.0 10.0 2.0 10.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.
EC4CAB 100 CV 10 x 35 1.0 10.0 2.0 12.0 34,500 
15.0 lbs.
30,500 
10.0 lbs.
14,200 
3.0 lbs.
4,750 
3.0 lbs.

Operational Specifications continued from page 5
Data Chart for ION-X 100 T Resin
6
Model Tank Size
(inches)
Cation
Exchange
Resin
(cu. ft.)
Max.
Service
Flow
(gpm)
Drain
Flow
(gpm)
psi Drop High
Salting
Medium
Salting
Low
Salting Efficiency*
EC4 50 T 8 x 44 0.5 10 1.5 12.0 10,800 
7.5 lbs.
9,200 
5.0 lbs.
4,400 
1.5 lbs. n/a
EC4 50 CT 8 x 44 0.5 10 1.5 13.0 10,800 
7.5 lbs.
9,200 
5.0 lbs.
4,400 
1.5 lbs. n/a
EC4 50SS T 10 x 18 05 9.5 1.5 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4 50SS CT 10 x 18 0.5 9.5 1.5 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4 60S T 10 x 35 0.6 9.5 2.0 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4 60S CT 10 x 35 0.6 9.5 2.0 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4 75 T 8 x 44 0.75 9.9 1.5 14.0 16,300 
11.2 lbs.
13,800 
7.5 lbs.
6.600 
2.25 lbs. n/a
EC4 75 CT 8 x 44 0.75 9.4 1.5 15.0 16,300 
11.2 lbs.
13,800 
7.5 lbs.
6,600 
2.25 lbs. n/a
EC4 100 T 10 x 44 1.0 10.0 2.0 10.0 30,500 
15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
EC4 100 CT 10 x 44 1.0 10.0 2.0 11.0 30,500 
15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
EC4 100S T 10 x 35 1.0 10.0 2.0 10.0 30,500 
15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
EC4 100S CT 10 x 35 1.0 10.0 2.0 11.0 30,500 
15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
EC4 150 T 10 x 54 1.5 9.6 2.0 12.0 45,700 
22.5 lbs.
39,200 
15.0 lbs.
20,300 
4.5 lbs.
4,516 
4.5 lbs.
EC4 150 CT 10 x 54 1.5 9.6 2.0 13.0 45,700 
22.5 lbs.
39,200 
15.0 lbs.
20,300 
4.5 lbs.
4,516 
4.5 lbs.
EC4 250 T 13 x 54 2.5 11.4 3.0 12.0 76,200 
37.5 lbs.
65,400 
25.0 lbs.
33,800 
7.5 lbs.
4,516 
7.5 lbs.
EC4 250 CT 13 x 54 2.5 11.2 3.0 13.0 76,200 
37.5 lbs.
65,400 
25.0 lbs.
33,800 
7.5 lbs.
4,516 
7.5 lbs.
EC4 400 T 14 x 65 4.0 10.8 4.0 12.0 122,000 
60.0 lbs.
104,700 
40.0 lbs.
54,100 
12.0 lbs.
4,516 
12.0 lbs.
EC4 400 CT 14 x 65 4.0 10.8 4.0 12.0 122,000 
60.0 lbs.
104,700 
40.0 lbs.
54,100 
12.0 lbs.
4,516 
12.0 lbs.
EC4CAB 60 T 10 x 35 0.6 9.5 2.0 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4CAB 60 CT 10 x 35 0.6 9.5 2.0 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4CAB 50SS T 10 x 18 0.5 9.5 2.0 9.0 11,900 
9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8 lbs. n/a
EC4CAB 60SS
CT 10 x 18 0.6 9.5 2.0 9.0 11,900  9.0 lbs.
10,000 
6.0 lbs.
4,800 
1.8. lbs. n/a
EC4CAB 100 T 10 x 35 1.0 10.0 2.0 10.0 30,500 
15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
EC4CAB 100
CT 10 x 35 1.0 10.0 2.0 11.0 30,500  15.0 lbs.
26,100 
10.0 lbs.
13,500 
3.0 lbs.
4,516 
3.0 lbs.
*The conditioners are efficiency
rated according to NSF/ANSI 44.
The efficiency of the conditioner
is valid only at the stated salt
dosage.
Higher or lower pressure will
affect the efficiency of the system.

Product Certification Information
The EC4 Series is tested and certified by NSF International to NSF/
ANSI Standard 44 and CSA B483.1 for the specific performance
claims as verified and substantiated by test data. Please refer to the
performance data sheets for specific reductions claims.
The EC4 Series is tested and certified by the WQA to NSF/ANSI
Standard 44 for the specific performance claims as verified and
substantiated by test data. Please refer to the performance data sheets
for specific reductions claims.
The EC4 Series is tested and certified by WQA to NSF/ANSI 372 for
California “lead free” compliance.
The EC4 Series is tested and certified by WQA to CSA B483.1
Standard.
Water treatment devices sold to retail consumers in California,
accompanied by certain health claims, must be registered to California
State Water Resources Control Board. Models EC4 75 CV , EC4 100
CV and EC4 150 CV are registered in California. All other models
are not registered in the State of California for the purpose of making
health claims.
7
!
Important Note: The supplied test
strip only tests for hardness. A
reduction of hardness is also an
indication that barium and radium
are being reduced*.
*Only the following models
are registered for barium and
radium reduction in the State of
California: EC4 75 CV, EC4 100
CV, EC4 150 CV. All other models
are not registered in the State
of California for the purpose of
making health claims.

8
Installation Instructions
1. Safety Precautions
• To prevent an accident and/or injury, do not hoist the unit over
your shoulder. Use a hand truck to transport the unit.
• Do not lay the unit on its side.
• Wear safety glasses and work gloves during installation
2. Test the Raw Water
• If water contains iron, manganese or hydrogen sulfide, a seperate
iron removal system is suggested to be installed prior to the
conditioner, consulting with your local dealer.
3. Check the Water Pressure
• Use a pressure gauge to confirm that the water pressure does not
exceed 120 psi. If the water pressure does exceed this limit, install a
pressure regulator on the inlet pipe of the unit. The minimum water
pressure for a conditioner is 20 psi. 60 psi is the optimum operating
pressure.
4. Locate a Site for the System
• There are three primary requirements needed for a site: the main
water source, an air-gap drain and a grounded electrical connection.
Locate the system as close to these items as practical. Drain lines over
50 feet long, may need to be increased in size to allow proper flow.
• Place the system in the desired location. The location should have a
level, smooth, and clean surface.
• If the system is located outdoors, protect the unit from direct
sunlight. Direct sunlight can damage the fiberglass and other system
components. If necessary, build a box or shed. In some installation
environments you may choose to partially bury the system. This is
done primarily for aesthetics, however this will add stability to the
system as well.
• We do recommend all systems installed outdoors include the valve
weather cover.
5. Install the Valve Head
• Remove the cap plug from the tank.
• Lubricate the riser pipe O-ring and tank O-ring with the Dow 111
silicone-based lubricant or equivalent.
• Attach the supplied upper basket to the bottom of the control
valve; twist to lock in place. Do not use if water contains any amount
of iron.
• Align the upper basket with the riser pipe and slowly lower the
control valve onto the riser pipe, using a twisting motion.
• Align the control valve with the tank. Push down on the control
valve and continue to turn it clockwise until the valve O-ring seals
against the tank (see figure 1).
Helpful Tip: The drain may be a
floor drain, a sewer trap, utility
sink, vent stack, dry well, etc.,
depending on local plumbing
codes.
!
Important Note: The system
can only be installed outdoors
in climates that do not reach
freezing levels.
!
Important Note: Do not over-
tighten the valve to the tank.
!
Important Note (For
Massachusetts Residents
Only) The Commonwealth of
Massachusetts Plumbing Code
248 CMR shall be adhered to. A
licensed plumber shall be used
for this installation.
!
Important Note: Water pressure
often spikes higher at night. We
recommend adding a pressure
regulator if your daytime
pressure reading is higher than
80 PSI.
!
Important Note: Not Applicable
for EC4-CAB and SS Models.

6. Turn Off the Water and Drain the Plumbing
• Turn off the water at the meter or the pressure tank.
• To drain the plumbing system, open all faucets in the house and
flush the toilets. The water will drain out of the lowest faucet or
outlet.
• Do not sweat pipes with water in them or while attached to the
system; steam will damage the plastic parts in the valve.
• Do not point the soldering torch directly at the mineral tank or
control valve. These composite materials will last a lifetime, but
cannot withstand the intense heat from a torch.
• Avoid short connections of pipe between the system and the
water heater. If you cannot avoid a short connection, move
the system to another location. As a last resort, install a heat
trap or check valve. If this causes “water hammer”, install a water
hammer suppressor.
7. Provide Untreated Water for Irrigation or
Outdoor Watering
• If available, run an untreated water line to outside faucet or
provide a hose connection on untreated line prior to system.
9
Helpful Tip: This procedure will
allow air to enter the plumbing
system.
!
Important Note: Applicable for
copper plumbing installations.
Figure 1
!
Important Note: Short connections
of pipe may allow hot water
to back up into the system.
Recommend at least 10 linear feet
or 3 linear meters of pipe between
Conditioner and Water Heater.

10
!
Important Note: Too much
weight on the plumbing
connections will cause a leak.
!
Important Note: The bypass
valve is not designed to
withstand heat from soldering
or twisting from the attached
threaded connections.
8 . Install the Pipe Connector (Yoke) to the
Bypass Valve
• Once the plumbing is complete, connect the yoke to the bypass
valve (see figure 2).
• Support all plumbing connected to the yoke.
• Connect the raw water supply to the inlet pipe connection of the
yoke. When looking at the front of the system, the inlet is the pipe
connection on the right side of the valve (see figure 3). The arrow
molded into valve indicates the direction of flow.
• Connect the treated water pipe to the outlet pipe connection on the
yoke. When looking at the front of the system, the outlet is
the pipe connection on the left side of the valve (see figure 3).
The arrow molded into the valve indicates the direction of flow.
• Ensure that the bypass valve is in bypass position. The valve handles
should be perpendicular to the pipes (see figure 4).
INLET
OUTLET
YOKE
Figure 2 Figure 3
Figure 4

9. Install the Drain Line and Air Gap
(Air Gap Not Supplied)
• For all drain lines, use at least a 1/2 inch I.D. line.
• Connect the drain line to the drain outlet on back of the valve,
opposite the inlet connection (see figure 5). A fitting is require to
connect the female pipe thread to the drain line. Run the drain line
to the air gap.
• The air gap should be installed between the end of the drain line
and the drain to prevent possible back siphoning (see figure 6).
11
Figure 5
"Mr. Drain"
AIR GAP
STAND PIPE
FOR
WASHER,
DRAIN
STACK
Figure 6
!
Important Note: The air gap
should be two times the diameter
of the drain line or a minimum of
two inches. Please check your
local plumbing codes to ensure
compliance.
Wrap PTFE Thread
Sealant Tape Around
1/2" NPT Elbow
1/2" DRAIN LINE
SPRING CLIP
DRAIN LINE
FLOW CTRL (DLFC)
DLFC CLIP

!
Important Note for EC4-CAB
Models: The overflow elbow is
located on the back of the brine
tank (not shown).
!
Important Note: The brine
overflow line must not be higher
than the overflow elbow on the
brink tank. (This is a gravity
overflow.)
Overflow Line connection is
only used if brine valve fails.
10. Install the Brine Safety Float
• Insert the brine well into the brine tank (see figure 7.1)
• Attach the brine well to the brine tank with the overflow elbow (see
figure 7.2).
• Insert the safety float into the brine well. The top of the safety float
should be about 5 inches from the overflow elbow (see figure 7.3).
11. Install the Brine Line
• Slide the brass compression nut over the end of the brine line,
followed by the ferrule and tube support. Attach the brine line
to the brass fitting on the right side of the valve (see figure 8).
• Insert a tube support into the other end of the brine line and push
the brine line into the brine safety float elbow. Use a locking clip
to secure the connection (see figure 8).
12
!
Important Note: Not Applicable
for EC4-CAB Models.
FIGURE
FIGURE 7.2
FIGURE 7.3 FIGURE 7.4
FIGURE 7.5
7.1
Figure 7
BRINE LINE
OVERFLOW LINE CONNECTION
Figure 8
!
Important Note: Systems 250
& 400 use a larger brine tank
than the one shown. “SS”
systems use a similar tank but
half the size of the one shown.

12. Install the Brine Overflow Line (Indoors)
• Run a 1/2 inch I.D. brine overflow line from the overflow elbow
on the side of the brink tank to an approved drain (see figure 8).
13. Attach the Electrical Connection
• Insert the barrel plug from the DC power supply into the mating
jack in the back of the control box .
• Plug the DC power supply into a 110 VAC 60 Hz or 230 VAC 50
Hz outlet.
System Start Up
1. Turn on the Water and Check for Leaks
• Close all faucets and turn the water back on at the water meter
or pressure tank.
• Check for leaks. If a leak is present, drain the plumbing again
before soldering.
2. Flush the Remaining Debris from
the System
• Open the cold water faucet on your bathtub.
• Allow the system to flush the remaining dirt and debris into the
bathtub, until the water runs clear.
• Open all remaining faucets and allow the plumbing to release any
trapped air in the system.
• Close all of the faucets.
3. Open the Bypass Valve
• Move the bypass valve handles to the service position. The valve
handles should be parallel to the pipes (see figure 9).
• Open a cold water tap and allow the appliance to flush for 20
minutes or until approximately 100 gallons has passed through the
appliance.
13
Figure 9
Helpful Tip: This procedure will
prevent dirt and debris from
entering the valve.
Helpful Tip: It is common for new
systems to have some color in the
water. The color should disappear
after you completely flush the
system.

14
4. Flush the Hot Water Heater
• Run hot water in the bathtub until the water tests soft.
5. Add Salt to Brine Tank / Control Settings
• See Salt Requirements before filling your brine tank with salt.
• Once the brine tank is full of salt, remember to increase the salt level
in the EC4 Control Head. Go to Customer Settings on Screen (Press
the Down Arrow). Salt Lvl : # (lbs / KG)
• Refer to the Level # on the side of the brine tank to calibrate current
amount of salt in tank. Weight shown is a reference per the level.
• When using Block Type Salt, please review Stacking Figures below
for correct and incorrect stacking methods of Salt.
Correct Stacking Using
- 50 lb Salt Blocks
Standard Block Dims
- 8.5 x 8.5 x 11.5
Total Blocks Possible
- 4 =200 lbs of Salt
Level - 4.0 level
- equal to 200 lbs (Correct)
Incorrect Stacking Using
- 50 lb Salt Blocks
Standard Block Dims
- 8.5 x 8.5 x 11.5
Total Blocks Possible
-3=150 lbs of Salt
Level - 4.0 level
- equal to 200 lbs (Not Correct)
STACK IN G BLOCK SALT - 50 lbs BLOCK S
11.5"
8.5"
8.5"
STACK IN G BLOCK SALT - 25 lbs BLOCK S
INCORRECT STACKING CORRECT STACKING
Incorrect Stacking Using
- 25 lb Salt Blocks
Standard Block Dims
- 8 x6x 8.5
Total Blocks Possible
- 6 =150 lbs of Salt
Level - 4.0 level
- equal to 200 lbs (Not Correct)
Correct Stacking Using
- 25 lb Salt Blocks
Standard Block Dims
- 8 x 6 x 8.5
Total Blocks Possible
- 8 =200 lbs of Salt
Level - 4.0 level
- equal to 200 lbs (Correct)
6"
8.5"
8"
INCORRECT STACKING CORRECT STACKING
!
Important Note: Not all Bag Salt
or Solar Salt are the same size
and consistency. The level is a
guide to help the EC4 Control
distinguish how much salt is
remaining in Tank.
!
Important Note: Systems 250
& 400 use a larger brine tank
than the one shown. “SS”
systems use a similar tank but
half the size of the one shown.
!
Important Note: Cabinet Models
are all in one systems that do
not require separate brine tank.

Salt Requirements
Two salt types are recommended for water conditioners:
• Block Salt: Water conditioner block salt is low in impurities, and
will not cake in the salt container.
• Bag Salt: Bag salt (Sodium Chloride) may be described on the
packaging as pellet, flake, crystal, or solar Salt.
Any of these salts are fine to use with your water conditioner system
as long as they are clean, high purity and labeled specifically for use
with water softeners..
Maintenance Requirements
Resin Cleaners
It is always wise to provide preventative maintenance for your
system. If small amounts of iron are present in your water, use a salt
containing iron remover or add RainSoft water conditioner cleaner
to the salt tank when adding salt. If an excessive amount of iron is
present in your water, we recommend the installation of an iron filter
before the conditioner. See your RainSoft Dealer for details.
Sanitize the Conditioner
It is common from to sanitize your Resin tank from time to time,
especially if any long periods of low water use is experience in the
Home. To do so;
• Mix a 3/4 cup of common (unscented) 5.25% household bleach
with 1 quart of water. Pour this solution into the brine well.
• Initiate a manual regeneration. The solution is drawn into
the conditioner during the regeneration process. See “Manual
Regeneration”
• After the system has completed a manual regeneration, the
conditioner will be sanitized and ready for use.
Cleaning the Regeneration Valve
The regeneration valve body is designed to last a lifetime, but from
time to time it may be necessary to clean and lubricate the moving
parts. Your water quality and the amount of regenerations necessary
will affect this maintenance schedule. Your local RainSoft Dealer
is knowledgeable in the different water qualities and will have the
necessary parts to complete this service.
Testing Your Water
If you are relying on this system for barium and radium reduction,
we recommend testing your water periodically (2 times a year) with a
hardness test strip (supplied) to ensure that the system is performing
properly, and that hardness, barium, and radium are being reduced*.
Additional hardness test strips are available at no charge from
RainSoft. Please call 1-800-860-7638 for your free two year supply.
In between testing, you can easily monitor the system’s performance
in the shower or while washing your hands. The feeling of soft water
should be present on your skin.
15
!
Important Note: Do not pour
undiluted bleach into the water
conditioner.
!
Important Note: Salt used for
melting ice, such as rock salt,
is typically high in impurities
and should not be used, since
dirt can clog the brine system.
Very fine, granulated salt is also
not recommended. The use of
granulated salt may cause service
problems.
Salt Blocks sold as cattle licks
should not be used, since these
may be high in impurities.
You can also use potassium
chloride instead of sodium
chloride. Potassium chloride is
usually available only in bags and
sold specifically for this purpose.
Consult your RainSoft Dealer
before use of potassium.
Helpful Tip: Resin cleaner will
prevent the treatment media from
becoming iron fouled.
!
Important Note: If you use a
cleaner containing nitric acid or
other strong oxidizing agents,
please use caution and follow
instructions carefully.
Helpful Tip: We recommend that
this service be performed every
three years or earlier if necessary.

16
An Overview of the Regeneration
Process
Your RainSoft EC4 Water Conditioner performs a periodic regeneration
cycle to clean mineral bed and restore its capacity. How often it
regenerates depends on your water use, incoming water hardness, and
several other factors, but 1 - 2 regenerations per week can be typical.
An automatic regeneration will never occur more than once a day, and
the Regen Time is set to occur when you are unlikely to be using water
(Default setting is 2:00 AM). Here is an overview of the regeneration
process.
Regen Process:
Cycle 1: Brine Tank Fill
The first step in preparation for the regeneration is the addition of
water to the brine tank. The amount of salt the conditioner uses in the
regeneration relates to the amount of water added in the brine tank. The
salt in the tank will dissolve into the water to the point of saturation.
Many softeners add a fixed amount of water to the brine tank at the end
of each regeneration cycle. With that type of unit, the water sits in the
tank until the next regeneration, usually for several days.
Your EC4 conditioner uses a sophisticated and efficient approach called
“proportional brining.” The EC4 continually monitors your water use
and determines when a regeneration is to be ran. If regeneration is
scheduled, the EC4 Control motor will move the valve to the brine refill
position about two hours before the scheduled time of regeneration.
You may hear the motor run and some water flowing at this time.
Because the EC4 knows how much water you have used, the control
will calculate the exact amount of salt that you will need to restore the
system capacity. Then 2 hours before the time of regen, the control will
start to fill just enough water to the brine tank to dissolve the quantity
of salt calculated.
EXAMPLE: If a regeneration is set for 2:00 AM that night, the system
start to regenerate at 12.00 AM. . The EC4 Valve start cycle 1. Once
cycle 1 is complete, the Valve will return to the home position during
cycle 2. During this time, your conditioner will continue to provide
treated water to your home.
CYCLE 2: Brine Make Up / Service
Once cycle 1 is complete and the brine tank has water, the valve returns
to home position and runs the time set for cycle 2. This time is adjustable,
but two hours provide the optimum solution. This gives the salt plenty
of time to dissolve and ensures that an accurate salt dose is used. The
system is still providing treated water to your home during this cycle.
CYCLE 3: Backwash
Once cycle 2 is complete, the valve moves to the backwash position
for the start of the actual regeneration of the system a little after the
set Regen Time. In the backwash position, the drain is inthe open
position, allowing water in the pressure tank to flow in reverse. With
water flowing from the bottom up, lifting and cleaning the mineral bed
inside the pressure tank. This removes any dirt or particles that have
accumulated on the top of the mineral bed. The remaining regeneration
cycles, all the water flowing through the tank will go to the drain to
allow for water movement. When using water in the home during this
regeneration process, untreated water is available to the house bypassing
thru the valve until the regeneration process is complete.

17
CYCLE 4: Brine Draw / Slow Rinse
Now that the system has completed cycle 3 and backwashed for the
set time, the valve moves to the brine draw position. In this position,
the valve creates a vacuum to pull the brine solution out of the brine
tank. The brine solution flows down slowly through the mineral bed.
This is the ion exchange process, when the hardness ions that have
attached to the softening resin exchange with the positively charged
sodium ions from the brine solution and sending the hardness ions to
the drain. After all the brine is drawn out of the brine tank, the system
continues to slowly rinse the mineral bed, allowing time for all the
resin beads to be recharged and rinse out any excess brine.
CYCLE 5: Fast Rinse
With the brine solution fully rinsed out, the valve then moves to its
final regeneration process cycle 5. Water flows top to bottom, quickly
flowing water through the bed for a final fast rinse. This settles the
mineral bed back down and serves as a final cleaning rinse. Upon
completion of cycle 5, the valve will return to the home position
ending the regeneration process.
NOTE: The entire regeneration cycle, from backwash to fast rinse,
takes one to two hours in most cases.
When to use the Manual Regeneration Option:
The EC4 Control has a manual regeneration mode available “Regen
Now.” See the “How to Initiate a Manual Regeneration” in this
manual on how start a manual regeneration. An example of when
to use a manual regeneration would be if you ran out of salt in your
brine tank and hard water is flowing in your home. Fill the brine tank
with Salt (See Add Salt to Brine Tank in the manual) then run a
manual regen, or schedule one for later in the evening to complete a
full regeneration of your system.
EC4 Display / Home Screen
The EC4 Display / Home Screen displays the current conditions of
your EC4 System. Press any button to turn on the display light. The
normal operation of the display will scroll between the following
information:
• Day of the Week, current Date, and Time.
• Capacity Remaining Bar and % Remaining: This bar indicates
the percent of capacity the softening media has remaining to
treat your homes water. When the set capacity setting is exceeded
(Default 7o%), the Softener will schedule a regen for the next
scheduled regen time.
• System Status: Normal or Alarm, Alarm will indicate current
Alarm situation will be identified on screen. Press any button on
display when Audible alarm is active to postpone alarm.
• Current Water Flow: This will only be show when water is
flowing through the outlet of the valve and an alarm is not active.
• Regen Scheduled: This will display only if a regen is triggered to
occur, displaying the time scheduled regeneration time. Regen
scheduled will replace the Capacity Bar.

18
Manual
Regeneration
Regen Now
Yes No
Information
Center
Customer
Settings
Size:
System Status
Salt Lvl:
Salt Alarm
Regen Time
Avg. Daily Water
Weekly Salt Use
Current Flow
FlowSinceRegen
Hardness
Iron
Est Next Regen
ConditionerInstall
Web Address
For Service Call
Salt Lvl: # lb
#
Vacation Mode
ON # days
OFF
Salt Alarm
ON 5:00PM
Current Time
03:53PM
Current Date
10/14/2019
Dailight Savings
ON/OFF
Regen Time
02:00AM
Press Enter to
Exit Settings
Use Right
button or
Left button
to scroll
through
the menu's
list of
functions.
Use Up/Down
buttons to
alter the
highlighted
value.
Use Left/Right
buttons to
highlight
desired value.
Press
enter to select.
Use Right
button or
Left button
to scroll
through
the menu's
list of
functions.
While in regeneration, press and
hold to advance valve to next cycle.
While in regeneration, press and
hold to cancel the regeneration and
send valve to service position.
Regeneration
in 10 s
Countdown starts
Regen Later?
OFF ON
Press Enter
to exit to
home screen
Press Enter
to set regen time.
Use Up/Down
buttons to adjust
hrs and min.
Exit to Home?
Yes/No
Press and hold
Enter button at
anytime to exit
to Home Screen.
Use Up/Down
buttons to alter
the highlighted
value. Press
enter to confirm.
Press and hold
Enter button at
anytime to exit
to Home Screen.
Use Up/Down
buttons to alter
the highlighted
value. Press
enter to confirm.
HouseFiltRemind
DrinkH2ORemind
AirMaster: Alarm
CleanStrtRemind
Press and hold
Enter button at
anytime to exit
to Home Screen.
Use Up/Down
buttons to alter
the highlighted
value. Press
enter to confirm.
Customer Setting Flowchart

19
Customer Settings
The Customer Settings customers to make changes to the EC4
Conditioner settings. Setting changes included:
To access Customer settings, press any button to light display.
When the display is lit, press the Customer Settings (Down Button).
Use the Left or Right buttons to scroll to the parameter you wish to
modify. Using the Up and Downs buttons to adjust values.
To exit the Customer Settings function at any time, press the Enter
key to save settings or navigate to end of settings using the Right
button.
Salt Level: Salt Lvl: [# lb /kg] [#level]
Level control that sets the level of salt in the brine tank ensuring the
system is able to monitor salt usage.
• After Filling Brine Tank with bag salt, block salt, Adjust level to
on EC4 Control to level indicated on the side of the brine tank
using the Up and Down Button.
• Block scale uses the 1-4 level on side of brine tank, the Bag salt
uses the 1-5 scale.
Vacation Mode: [OFF] / [ON - 2 Days]
Off / On setting, this will is used when you are planning on being
away for extended time with little water use. Upon return, the EC4
Conditioner will complete a full regen for fresh water to the home.
• Use the Up or Down button to select “ON”.
• If you selected “ON”, press the Right button.The computer will
display: Days Away – 2 Days.
• Use the Up and Down button to change the number of days away.
Salt Alarm: [OFF] / [ON - 5:00 PM]
Off /On setting that will enable an audio alarms to sound when the
system has low salt. The Audio alarm will only for 1 hour during the
time set.
• Use the Up or Down buttons to select “OFF”.
• If you chose to keep the alarm “ON”, press the Right button.
Use the Up and Down buttons to change the alarm time,
if desired.
Current Time: [12:00 PM] or [24:00]
To set the current time of day.
• Press the Right button to move between Hours & Minutes.
Use the Up and Down buttons to change the value.
Current Date: [Month/Day/Year] or [Day/ Month/Year]
To set the current Day of Year.
• Press the Right button to move between Month /Day /Year.
Use the Up and Down buttons to change the values.
!
Important Notes: After setting
the vacation mode, the computer
will provide a 16 hour delay for
your convenience. If water use is
detected after the 16 hour delay,
the vacation mode is deactivated.
One day prior to the scheduled
return, the system will regenerate
at the normal regeneration time.
This feature will ensure a fresh
conditioner bed upon your arrival.
!
Important Note: Installer settings
can change the units of measure.
Availble settings are:
Gallons / Grains / AM:PM
Liters / TH / 24:00
Liters / PPM / 24:00
Discuss this options with your
RainSoft Dealer / Installer.
Helpful Tip: Your system is
designed to alert you when the
salt tank needs to be refilled.
Select an alarm time that is most
convenient for you.

Daylight Savings: [ON] / [OFF]
On / Off setting that will automatically adjust for daylight savings time
in applicable areas.
• Use the Up or Down button to select “OFF”.
Regen Time: [02:00 AM] or [02:00]
Enter the time of day that the EC4 will enter into regeneration and
treated water will not be available. Default setting is 2:00 AM
• Use the Up or Down button to change the hour of regeneration.
To exit the Customer Settings, press the Enter button, or continue
Right button to exit settings.
How to Initiate a Manual
Regeneration
Press any key to on the control to wake up the display. Press the Enter
/ Regen button to enter Regen Menu.
The computer will display: Regen Now ?
• Select “Yes”, press the Enter / Regen button. The display will
start a 10 second count down to begin full regeneration. To cancel
manual regeneration, during the 10 second count down, press
any button to stop the manual regen. When the count down ends,
the Regeneration Process will begin. It is best to complete the
Regeneration Process fully, however you can step each stage of the
Regen process if initiated in error by pressing and holding the Right
Arrow Button.
To initiate a Regen Later?
• Follow the same steps from above, however, press the Right
Arrow button to select “No”, press the Enter / Regen button.
“Regen Later”? OFF is displayed. Use the Up or Down button to
“ON”, Right Arrow button over to the displayed time. The time
listed is the time the EC4 Regen is set to. Using the Up or Down
buttons you can adjust the time for the regen later. Press Enter /
Regen button to confirm Regen Later time.
• To cancel Regen Later, follow same steps as above entering Regen
Now Mode and turn the Regen Later Option from “On” to “Off”.
20
Helpful Tip: If auto daylight
savings time is “ON”, the
system will automatically adjust
the clock in the spring and fall.
Only set the daylight savings
time to “OFF” if daylight savings
time is not observed in your
area.
Helpful Tip: Regen Later Timing
planning. The Regen process
starts two hours before the set
time. Example - Regen Later ON
set for 3:00 AM. Regen process
will start at 1:00 AM.
!
Important Note: Adjustment
to the Regen Later time will
not change the Regen Time
programmed in customer
settings.
!
Important Note: When you exit
the Customer Settings, the EC4
will automatically save any
changes that have occurred.