Culligan CTM 21 Operation manual

CULLIGAN®
Culligan Top Mount (CTM)
Water Filters
Models from 2016
©2016 Culligan International Company
Installation,
Operation, and
Service Instructions
with Parts Lists
Cat. No. 01029343
Rev. A 04/18/16
DCO # 016181

Attention Culligan Customer:
Your local independently operated Culligan dealer employs trained service and maintenance personnel who are experi-
enced in the installation, function and repair of Culligan equipment. This publication is written specifically for these individ-
uals and is intended for their use.
We encourage Culligan users to learn about Culligan products, but we believe that product knowledge is best obtained by
consulting with your Culligan dealer. Untrained individuals who use this manual assume the risk of any resulting property
damage or personal injury.
WARNING! Electrical shock hazard! Prior to servicing equipment, disconnect power supply to
prevent electrical shock.
WARNING! If incorrectly installed, operated, or maintained, this product can cause severe injury.
Those who install, operate, or maintain this product should be trained in its proper
use, warned of its dangers, and should read the entire manual before attempting to in-
stall, operate, or maintain this product. Failure to comply with any warning or caution
that results in any damage will void the warranty.
CAUTION! This product is not to be used by children or persons with reduced physical, senso-
ry or mental capabilities, or lack of experience or knowledge, unless they have been
given supervision or instruction.
CAUTION! Children should be instructed not to play with this appliance.
CAUTION! If the power cord from the transformer to the unit looks or becomes damaged, the
cord and transformer should be replaced by a Culligan Service Agent or similarly qual-
ified person in order to avoid a hazard.
CAUTION! To reduce the risk of fire, use only No. 26 AWG or larger telecommunications line
cord.
NOTE This system is not intended for use with water that is microbiologically unsafe or of unknown quality
without adequate disinfection either before or after the system.
NOTE Check with your public works department for applicable local plumbing and sanitation codes. Fol-
low local codes if they differ from the standards used in this manual. To ensure proper and efficient
operation of the Culligan CTM Softener to your full satisfaction, carefully follow the instructions in this
manual.
Products manufactured and marketed by Culligan International Company (Culligan) and its affiliates are protected by pat-
ents issued or pending in the United States and other countries. Culligan reserves the right to change the specifications
referred to in this literature at any time without prior notice. Culligan, Aqua-Sensor, Tripl-Hull, and SoftMinder are trade-
marks of Culligan International Company or its affiliates.
Culligan International Company
9399 West Higgins Road, Suite 1100
Rosemont, Illinois 60018
1-847-430-2800
www.culligan.com

i
Cat. No. 01029343
Contents
Introduction........................................................................ 1
Basic Principles ................................................................. 2
Performance Specications............................................... 3
Installation ......................................................................... 5
Smart Controller Circuit Board Layout............................. 23
Installing Accessories...................................................... 24
Final Startup .................................................................... 40
Preventative Maintenance............................................... 41
Service and Repair.......................................................... 42
Troubleshooting............................................................... 56
CTM Parts List................................................................. 64
Appendix A Hi-Flo 42 to CTM Conversion.................... 74
Limited Warranty ............................................................. 75
Index................................................................................ 76
CULLIGAN®
Culligan Top Mount (CTM)
Water Filters
Models from 2016

ii Culligan® Culligan Top Mount (CTM) Water Filters ii Cat. No. 01029343
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Introduction 1
Cat. No. 01029343
Introduction
Read this Manual First
Before you operate the Culligan®CTM Water Filter, read this manual to become familiar with the device and its capabili-
ties.
The Culligan CTM Carbon and Depth Filters have been tested and certified by WQA against NSF/ANSI Standard 372 and
NSF/ANSI Standard 61 for Materials Safety Requirements only. Not certified for Contaminant Reductions and Structural
Integrity by WQA.
About this Manual
This manual:
• Familiarizes the operator with the equipment
• Explains installation and setup procedures
• Explains the various modes of operation
• Gives specifications and troubleshooting information
NOTE Refer to GBE Programming for Commercial Softeners and Filters (except for HFxN) Manual (P/N
01027295) for programming information. This manual can be obtained from your local dealer, CPort
(www.cport.culligan.com) under the Technical Service Tab or on the iPad Service Tech App.
Safe Practices
Throughout this manual there are paragraphs set off by special headings.
Notice
Notice is used to emphasize installation, operation or maintenance information which is important, but does not present
any hazard. For example,
NOTICE The nipple must extend no more than 1 inch above the cover plate.
Caution and Warning
Caution is used when failure to follow directions could result in damage to equipment or property. For example,
CAUTION! Disassembly while under water pressure can result in flooding.
Warning is used to indicate a hazard which could cause injury or death if ignored. For example,
WARNING! Electrical shock hazard! Unplug the unit before removing the timer mechanism or
cover plates!
The CAUTION and WARNING paragraphs are not meant to cover all possible conditions and situations that may occur. It
must be understood that common sense, caution, and careful attention are conditions which cannot be built into the equip-
ment. These MUST be supplied by the personnel installing, operating, or maintaining the system.
Be sure to check and follow the applicable plumbing codes and ordinances when installing this equipment. Local codes
may prohibit the discharge of sanitizing or descaling solutions to drain.
Use protective clothing and proper face or eye protection equipment when handling chemicals or power tools.
NOTE The Culligan CTM Water Filter is not intended for use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection either before or after the system.
NOTE Check with your public works department for applicable local plumbing and sanitation codes. Follow
local codes if they differ from the standards used in this manual. To ensure proper and efficient
operation of the Culligan CTM Water Filter to your full satisfaction, carefully follow the instructions in
this manual.

2 Culligan® Culligan Top Mount (CTM) Water Filters 2 Cat. No. 01029343
Basic Principles
Activated Carbon Filter
Filters reduce unpleasant taste and odors from the water supply. In normal operation, the water passes through the multi-
port valve into the top of the media tank. As it flow down through the mineral bed, sediment in the water is filtered out and
objectionable dissolved gases are absorbed into the mineral. The clear water that leaves the bottom of the media tank
and goes into the service lines is free from many disagreeable taste and odors.
Depth Filter
Depth filters filter both heavy sediment and suspended matter from the water supply. In normal operation, the water
passes through the multi-port valve and into the top of the media tank. As the water flows down through the mineral bed,
sediment in the water is filtered out. The clear water that leaves the bottom of the media tank and flows through the ser-
vice lines is free from most sediment and suspended matter.
Filtering Process
To keep the filter operating properly, it is necessary to periodically remove the accumulated sediment from the mineral
bed. This done by a three-step process:
Backwash
The direction of flow through the tank is reversed, and the mineral bed is backwashed. This action expands and agitates
the bed, releasing the sediment that is then carried up and out to the drain.
Settle
The tank is allowed to be in an idle state to tallow the different types of media to stratisfy and settle. Water flow to the
drain will be present during this step.
Fast Rinse
A rapid downflow flush repacks the mineral bed and washes out traces of sediment not removed by backwash.
Backwash Frequency
Generally, backwash the CTM filter once per week. However, more frequent cleaning is recommended for water with high
turbidity. On carbon filters operated semi-automatically or automatically, backwash when the pressure drop across the
bed is 8–10 psi higher than a normal clean filter bed.
On depth filters with pressure gauges, the differential pressure across the filter can be monitored. A depth filter should be
cleaned when the differential pressure across the filter increases by 8–10 psi over the pressure differential across a clean
filter bed.

Performance Specifications 3
Cat. No. 01029343
Performance Specifications
Specifications for CTM Water Filters
In order to function properly, some operational parameters must be followed. They include:
1. An operating water pressure between 35 and 125 psi (241–862 kPa). If water pressure is greater than 80 psi, Cul-
ligan recommends following the IAPMO Uniform Plumbing code section 806.2 by installing a Pressure Regulating
Valve before the system. Operating on high presure for extended periods of time can increase the service frequency
of replacement parts. If water pressure can drop below the minimum water pressure, add a booster pump or operate
the pilot valve using compressed air to maintain a 35 psi (241 kPa) minimum operating pressure.
NOTE If an air compressor is used, it must be “oil free” and set at 10 psi greater than the maximum static
water pressure.
2. Operating temperature between 40° and 120°F or 4.4°–49°C.
3. Clear (non-turbid) water supplies (Less than 5 NTU).
4. Voltage of 120V, 50/60 Hz
Table 1. CTM Carbon Filter Flow Specifications.
Model 21 24 30 36
Organics Removal Flow (gpm) 12 16 25 35
Organics Removal Flow (pressure drop) 1.5 2 3 3
Dechlorination Flow (gpm) 24 31 49 71
Dechlorination Flow (pressure drop) 4 4 6 9
CV System 12 15.5 20 23.7
Backwash/Rinse Flow (gpm) 30 48 70 90
Table 2. CTM Depth Filter Flow Specifications.
Model 21 24 30 36
Continuous Service Flow (gpm) 24 32 50 71
Continuous Service Flow (Pressure Drop) 5 5 7 10
Maximum System Flow (gpm) 36 48 74 107
Maximum System Flow (Pressure Drop) 10 9 11 19
CV System 11.4 16 24.5 24.5
Backwash/Rinse Flow (gpm) 30 48 70 90

4 Culligan® Culligan Top Mount (CTM) Water Filters 4 Cat. No. 01029343
CTM Dimensions
Table 3. CTM Dimensions (inches)
Model 21 24 30 36
Overall Depth 21.5 24 30 36
Overall Width 23.8 25.2 30 36
Overall Height (A) 85.5 94 95.7 102
Plumbing Height (B) 74.1 82.6 84.3 90.6
Tank Height (C) 67 75.5 77.2 83.6
NOTE Allow a minimum of 12" above the overall system height for access into the top of tank(s).
Figure 1. Overview
Controller can be wall mounted
Drain
A
Drain
B
C
Inlet
4.75”
Outlet
11”
19.6”
Brine
13.3”
23.8”
NOTE Dimensions for all models

Installation 5
Cat. No. 01029343
Installation
Materials
The following are necessary components for installing a Filter.
*Not included with Timeclock models
Figure 2. Materials
Media
(Separate
Packaging,
See Table
4 on page
7)
Media Tank
(Boxed
Separately)
Vacuum
Breaker*
GBE Controller
(Boxed Separately)
Plumbing Adapter
(Sold Separately)
Flow Meter* (Comes
with Valve)
Eductor Throat
Drain Adapter
Drain Line
Flow Control
Distributor (Boxed
Separately)
Lubricant (Dow Corning 111/Molykote
111, Not Provided)
Pressure Relief*
GBE Front
Mounting Kit
Pilot Valve
Strainer
Sizing Kit

6 Culligan® Culligan Top Mount (CTM) Water Filters 6 Cat. No. 01029343
Locate Filter
1. Select a space that is level and allows a sufficient amount of room above and behind the filter tank(s) for ser-
vice access and plumbing supply and drain lines.
2. Floor surface—Choose an area with a smooth, solid and level floor capable of supporting the operating weight
of the softening system
3. Drain facilities—A nearby drain must be capable of handling the water filter discharge flow rates during the
backwash cycle of the regeneration process in addtion to the maximum flow rates of other equipment feeding
into the same drain. Refer to page 3 for information concerning the backwash flow rate.
Install Distribution System
CAUTION! Do not attempt to use any distribution part that is damaged. Doing so may create
operational problems and/or create a substantial risk of consequential damage not
covered by the product warranty.
Figure 3. Install Distribution System
Mark flush with tank opening
Media Tank
Remove distributor and cut square on mark
Deburr distributor pipe
Media Tank
Rest flat on the bottom
Distributor

Installation 7
Cat. No. 01029343
Loading the Media
Table 4. Loading Quantities.
Model 21 24 30 36
Carbon Filter
Cullsan Medium Gravel (lbs) 100 200 300 450
Cullsan U (lbs) 100 100 150 200
Cullar D Plus (lbs) 165 220 330 495
Freeboard (inches) 21 23 24 25
Depth Filter
Cullsan Medium Gravel (lbs) 100 200 300 450
Cullsan U (lbs) 100 100 100 200
Cullsan G50 (lbs) 100 100 150 250
Cullsan A (lbs) 165 220 330 495
Cullcite (lbs) 150 250 350 500
Freeboard (inches) 24 31 33 33
NOTE Do NOT attempt to load the media without having the tank in its final position. Moving the tank once
the media has been loaded will be difficult at best.
1. Cover the top of the distributor pipe with tape that will prevent media from entering the distributor.
2. Use a funnel in the opening to add 6” of water to protect the distributor.
3. Load Media per Table 4 and Figure 4 or Figure 5.
4. Clean tank threads, remove tape and check for any foriegn materials
NOTE Minimize the amount of water added until final positioning of the tank with the control valve mounted.
Figure 4. Carbon Filter Figure 5. Depth Filter
Freeboard
Cullar D Plus
Cullsan U
Cullsan Medium Gravel
Freeboard
Cullcite
Cullsan A
Cullsan G50
Cullsan U
Cullsan Medium Gravel

8 Culligan® Culligan Top Mount (CTM) Water Filters 8 Cat. No. 01029343
Mount the Valve
Figure 6.
1. Position and
lubricate large
o-ring above
threads.
2. Lubricate small o-ring
3. Attach upper disperser by snap-
ping into the slots in the tank
adapter. Making sure, that it is
secured.
4. Twist the valve onto the
tank, counterclockwise
to the thread start. Twist
clockwise, handtight, until
the large o-ring is fully com-
pressed in the tank.
NOTE Tank may need to be rotated for
preferred positioning.
CAUTION! Do Not Overtighten!

Installation 9
Cat. No. 01029343
Plumbing Adapter
Figure 7.
Insert pins into the valve body and adapter
Flow Meter
(Second coupling in
Timeclock models)
Lubricate o-rings
Lubricate o-rings
Coupling
1.5” or 2” Threads
Insert Plumbing Adapter
CAUTION! All sodering must be done on any
connections requiring soldering prior to
connecting the main control valve. The
main control valve will be damaged if it is
connected at the time of soldering.

10 Culligan® Culligan Top Mount (CTM) Water Filters 10 Cat. No. 01029343
Install Piping
1. Depending on the type of filter system (such as single, duplex, or triplex) and the installation parameters,
required pipe lengths and piping accessories will vary. See “Performance Specifications” on page 3to aid
the installation. If the layout drawings are not sufficient for your application, consult the Culligan dealer for spe-
cific installation guidelines.
NOTE The use of unions and inlet and outlet isolation valves is REQUIRED to facilitate the servicing of the
system. It is also recommended a full flow by-pass line be provided.
2. Follow good plumbing practices for installation. These include:
a. Check threads and make certain that they are clean and free of foreign matter.
b. Fittings must be free of cracks or chips.
c. Prepare threads with either a pipe dope sealant or Teflon tape.
d. Make certain that the fittings are not cross threaded during the assembly process.
e. Do not over-tighten fitting or threaded pipe being inserted into a cast or forged part.
CAUTION! The media tank must never be subjected to an internal vacuum or it might be dam-
aged. Drain line suction can be prevented by installing siphon break. Refer to Figure
10 on page 13.
Use of Bypass Valve
Depending on where the particular installation was made, the outside sill cocks may or may not be served by conditioned
water. Ideally, all lines not requiring filtered water should be taken off upstream of the filter. This is not always possible,
however, due to the difficulty or expense of rearranging the piping.
Bypass the softener if:
1. The outside lines do not bypass the water filter and the water is to be used for lawn sprinkling or other outside
uses.
2. Water is not used for several days.
3. You wish to inspect or work on the valve or brine system.
4. A water leak from the valve is evident.
Three-Valve Bypass
To bypass, close the inlet and outlet valves, and open the bypass valve. Reverse the process to get filtered water once
again. Be sure to close the bypass valve completely to avoid mixing unfiltered water with filtered water. (See Figure 8)
CAUTION! If the media tank is to remain attached to the control valve, close only the inlet valve,
then open the bypass valve. This will prevent pressure from increasing in the media
tank due to warming.

Installation 11
Cat. No. 01029343
Suggested Piping Installation
CAUTION! Make sure that the plumbing connections to the inlet and outlet are all securely fas-
tened using items, such as pipe hangers, clamp, etc, to prevent damage to the valve.
The plumbing connections should also allow for 1/4” of movement.
NOTE Interconnecting pipe and fittings, bypass valves and isolation valves are not supplied.
Figure 8. Three-Valve Bypass CTM Single Tank Piping.
Bypass Valve (Normally Closed)
Filtered
Water
Manual Outlet
Valve
Unfiltered
Water
Manual Inlet
Valve
Inlet/Outlet
NOTE Connecting piping must allow the valve to be removed
without interference

12 Culligan® Culligan Top Mount (CTM) Water Filters 12 Cat. No. 01029343
Figure 9. CTM Duplex Piping
CTM Controller
Manual Inlet Valve
Filtered Water
Outlet
Top View
InletOutlet
Manual Oulet Valve
Unfiltered Water
Inlet

Installation 13
Cat. No. 01029343
Drain Line
Proper discharge height and distance of the drain line will be dependent on the pressure supplied to the valve. Discharge
to a nearby floor drain will cause no backpressure, if the drain line needs to run overhead, the maximum height is 10’ at
the minimum supply pressure without decreasing vacuum on the brine line.
Make sure unit is properly located to the drain, refer to “Locate Filter” on page 6.
WARNING! Do not make a direct connection to the drain. Provide an air gap, that conforms to state
and local sanitation codes and to premit the observation of drain flow.
Figure 10.
Siphon
Break
Air
Gap
Drain
Min. Standpipe Height
25% of Discharge Height
CAUTION! Securely fasten and support drain
piping to prevent damage to the
valve and allow for 1/4” of movement
during regeneration.
Min. Diameter 1”
NOTE Hard piped drains should include a union
for ease of service.
1.5” Drain
Adapter

14 Culligan® Culligan Top Mount (CTM) Water Filters 14 Cat. No. 01029343
Drain Line Flow Control (DLFC) and 1.5” Drain Adapter
Table 5. Drain Line Flow Control
Model Carbon Depth
21” 24” 30” 36” 21” 24” 30” 36”
Backwash 20 gpm 30 gpm 50 gpm 70 gpm 30 gpm 50 gpm 70 pgm 90 gpm
Body 3 Position 3 Position 8 Position 8 Position 3 Position 8 Position 8 Position 8 Position
Inserts 2 Orange,
1 Plug* 3 Orange
3 Orange,
1 Black,
4 Plug*
5 Orange,
1 Black,
2 Plug*
3 Orange
3 Orange,
1 Black,
4 Plug*
5 Orange,
1 Black,
2 Plug*
7 Orange,
1 Black
*The plug’s color is black.
Figure 11.
Push in hard on drain adapter until this
corner is flush with the valve.
Lubricate o-ring
Lubricate
o-ring
Insert drain line flow control in
this orientation.
Push down on clip, while
holding the adapter in place.
CAUTION! Clip was designed to stay attached
to the valve. Do NOT try to detach.
Flow Control Body
Flow
Control
Inserts
8 Position3 Position
Flow
Control
Inserts
Flow Control Body

Installation 15
Cat. No. 01029343
Pressure Relief Valve (PRV)
WARNING! PRV should be plumbed to a suitable floor drain independent of the drain line for emer-
gency relief.
Figure 12.
Lubricate o-ring
Insert fully
into valve
Push in the clip, while holding
the PRV in place.
CAUTION! Clip was designed to stay attached
to the valve. Do NOT try to detach.
1” Thread

16 Culligan® Culligan Top Mount (CTM) Water Filters 16 Cat. No. 01029343
Eductor Nozzle and Throat Replacement
Figure 13.
Pull to release plug
Push to secure
CAUTION! Clip was designed to stay attached
to the valve. Do NOT try to detach.
Twist off to remove nozzle and throat
Leave in existing throat, nozzle is
not required for filter applications.
Remove with pliers. Replace with eductor
throat in sizing kit. Lubricate o-rings.
Lubricate o-rings.
Insert fully to
secure.