FMI CTS User Manual

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CTS Series: CT1, CT2, CT1V, & CT2V

Chemical Treatment Systems

INSTALLATION & OPERATING INSTRUCTIONS

OVERVIEW:

The CTS from Fluid Metering Inc. is the solution for
accurate, maintenance-free injection of liquid sodium
hydroxide (Caustic Soda) typically used for pH
adjustment, as well as other chemicals used in water
and wastewater treatment applications.

The CTS system eliminates check valves and/or
peristaltic tubing typically present in traditional
chemical metering systems, which are the primary
sources of routine maintenance and downtime. The
CTS does not lose prime, even against pressure, or air
lock. The CTS is available as a complete system
(CT1V & CT2V) consisting of the CTS Pump Module
and C100A Variable Speed Controller, or can be
supplied alone to be used with a compatible controller.

The CTS Pump Module is a unique valveless pump
design consisting of a rotating and reciprocating
(CeramPump®) ceramic piston, direct coupled to a
variable speed drive motor. The CTS pump injects the
caustic soda directly into the main water stream, at
back pressures up to 125 psi.

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The C100A Variable Speed Controller from Fluid
Metering, Inc. provides an ideal control interface for
the CTS. The C100A supplies a variable 0-90VDC
power source which can be controlled either manually
using a from panel mounted rotary dial, or
electronically via a 4-20 mA control input.

CTS Pump Module

and C100A Variable S

* Other commercially available controllers may work, however we
recommend contacting FMI for details.

eed Controller

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SPECIFICATIONS

CTS Chemical Treatment System

Supply Voltage: 0-90 VDC**
CTS Supply: 1/4” FNPT CTS Outlet: 1/4” FNPT

IMPORTANT NOTE: Supply and Outlet fittings contain
Buna-N material which is not compatible with fluids
containing chlorine. Do not use the CTS with hypochlorite,
chloramine, or any fluids which contain chlorine
compounds in ANY concentration.

Output Volume: 6.5 GPH max. - CT1(V)
15 GPH max.- CT2(V)
Output Pressure: 125 psi max.

Environment: Humidity: 100% RH non-condensing
Temp: non-freezing to 104°F

Enclosure: Gasketed Fiberglass w/ vent holes.
Dimensions: 15 1/2” x 13 3/8” x 6 3/4”
Weight: 18.6 lbs. (8.4 kg)
** 0-90 VDC su

lied by C100A

INSTALLATION & SETUP
CTS MOUNTING (See diagram page 3)

For optimal performance, mount the CTS as close to
and above the chemical supply reservoir. Securely
fasten the CTS to a wall location with its right side
convenient to the Sodium Hypochlorite supply vessel.
There are 2 mounting holes (5/16” dia) on each side of
the CL enclosure. Utilize all holes for most secure
mounting and mount at least 1 ft. above supply
reservoir.

Diagram 1 (below) shows the mounting hole locations.

Diagram 2

Electrical & Fluid Connections

Diagram 1

Mounting Holes

IMPORTANT NOTE: There are 2 vent holes located at the top front of the enclosure (under the upper lip of the enclosure cover).
Do not close, seal, or obstruct these vent openings. They are designed to prevent hazardous gases from building up in the

ELECTRICAL

On the upper left side of the CTS enclosure is a 7/8”
conduit opening for the electrical supply (0-90 VDC
source from the C100A or customer supplied voltage
controller). Electrical supply wiring should be 3
conductor, minimum 22 AWG. Attach wiring to the
lower 3 spade lugs of the terminal block as shown
below in Diagram 3. Connect the ground wire to the
left most spade lug. Connect the drive wires to the
remaining 2 spade lugs.

It is recommended that electrical connections be
coated with a corrosion protectant such as Aqua­lube or equivalent.

Note: The CTS is designed so that the motor will
turn in the proper direction, regardless of input

Diagram 3

Terminal Wiring

polarity.

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FLUIDIC CONNECTIONS

The CTS has two 1/4” FNPT fluid connections.
The INLET (Supply) connection is a 1/4” FNPT fitting

located on the lower right side of the enclosure and
connects the CTS with the chemical supply reservoir
(carboy, tank, etc.) Inlet tubing is customer supplied and
should be semi-rigid and sized adequately t o accommodate
the required flow rate to prevent cavitation. Minimum
recommended inlet tubing diameter is 1/2” I.D.

The OUTLET (Dispense) connection is a 1/4” FNPT fitting
located on the upper right side of the enclosure and
connects the fluid output of the pump to the water source to
be treated, typically a water main. The CTS is designed to
pump against 125 psi backpressure, and therefore all
plumbing on the discharge side of the pump should rated for
250 psi. It is recommended that 1/4” O.D. polyethylene
tubing is used for the output tubing.

Installation Notes:

1) Be careful not to over-tighten fittings to the CTS
box as the bulkheads are made of PVC and may
crack.

2) For optimal performance, mount the CTS as close
to the source as possible and above it.

3) The CHLORITROL
backflow concerns typically associated with
diaphragm and peristaltic pumps. Because the
inlet and outlet fluid path of FMI’s CeramPump®
valveless piston pump are never interconnected, a
backflow check valve is usually not required.
However, local code requires a check valve on the
inlet side of the pump, refer to the “Tips &
Troubleshooting” section of this instruction
manual.

®

was designed to overcome

1 ft. min

Diagram 4

Fluidic System Overview

ADJUSTING FLOW RATE
Mechanical Adjustment: By adjusting the angle of

the high pressure pump head (pump head on right side
of drive) using the adjustment knob, piston
displacement can be increased and decreased, which
in turn will vary flow rate. Diagram 5 shows the
minimum (0%), maximum (100%), and factory set
(50%) pump head positions.

Electronic Adjustment: The C100A Variable Speed
Controller varies pump speed and has both manual and
electronic control modes.

For manual speed adjustment, set the C100A mode on
MANUAL and use the rotary dial to increase or
decrease pump speed.

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PUMP HEAD ANGLE

(Displacement Adjustment)

Diagram 5

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