ProMinent DCM 2 Series User manual

p/n 7500612
Installation Guide
DCM 2 series
Aquatic Water Quality Controller
ProMinent Fluid Controls 136 Industry DrivePittsburgh, PA, USA 15275-1014 DCM 2 Installation Guide 12/9/16

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Contents
1. Overview
2. Installation-Commissioning
2.1. Safety
2.2. Mounting
2.2.1. Sample Connections
2.2.2. Sensor Installation
2.3. Wiring
2.3.1. 120VAC Line Power and Feeder Wiring
2.3.2. Pulse Controlled Pumps
2.3.3. Flow switches, Contact Sets, and Water Meters
2.3.4. Sensors
3. Calibrations
3.1. Single Point Calibrations, 1 point or Standardization
3.2. Two Point Calibration
4. Password Security
4.1. Overview
4.2. Password Level Activities
4.3. Browser Passwords & Lockout
4.4. LCD Keypad Passwords
4.5. Passwords Reset
5. Application Notes
5.1. Sensor Inputs & Control Outputs
5.2. Communications
5.2.1. Ethernet
5.2.2. USB Services
5.2.3. Data Logging
5.3. Control Configuration
5.3.1. Control Method
5.3.2. Frequency Controlled Pump Contacts 4 & 5
5.3.3. Special Control Responses
6. Sensors
6.1. Compensation
6.2. Digital Input Sensor F
6.3. Contact Sets, Flow Switch F
6.4. Frequency Controlled Pumps
6.5. Technical: Pump Frequency-Stroke Controls
6.6. Relay & Frequency Controls Comparison
6.6.1. ON/OFF Controls
6.6.2. Frequency Controls
6.7. System Alarms & Indicating LEDs

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Contents
6.8.Units for Volumes & Temperatures
6.8.1. Metric – US Units Selection
6.8.2. Water Meter Volumes
6.8.3. Rate-to-Volume
6.8.4. Copy Volume to
6.8.5. Pump Volumes
6.8.6. mL/Pulse Meters
6.8.7. Temperatures
6.8.8. User Assigned Units
7. Spare Parts

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1. Overview
1.1. All ProMinent DCM2 controllers have an integral web server with an RJ-45 Ethernet connection,
ready to communicate with any internet ready computer, regardless of operating system. This
makes the ProMinent DCM2 one of the easiest aquatic controllers to remotely monitor and
control your pool or spa.
1.2. DCM2 controllers are optimized for aquatic water disinfection control applications. These
controllers use sensors to measure water quality and then control chemical feeders, UV systems,
recirculation pumps, heaters and more to maintain a safe and comfortable aquatic environment.
1.3. AC powered pumps and solenoids for ON-OFF, Time Modulated, and PID control may also be
used with pulse frequency controlled pumps.
2. Installation-Commissioning
2.1. Safety
Before we talk about any installation or configuration, we need to talk about safety for you and your
co-workers, customers and swimmers. Please read and follow the caution and warning statements
below to familiarize yourself with the hazards associated with installation and operation of the
equipment covered in this manual.
General Precautions
Electrical Shock Hazards
Opening the controller enclosure with the
controller power turned on or plugged in, may
expose the user to AC line voltages on the
controller circuit boards.
Ground the controller AC power ground (earth)
conductors to the ground lug provided.
A 120VAC plug and receptacle socket cables are usually provided with controllers installed in North
America. All must be grounded to the ground lug provided.For personal safety, and moisture
corrosion contamination prevention, the enclosure cover should always be installed and secured with
all 4 screws when the DCM2-CL is in operation.
Read this installation manual completely
before attempting the installation of your
ProMinent controller.
Follow all CAUTIONS,WARNINGS and
DANGER notices for the safety of installers
and pool users.

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Configuration Hazards
Flow Switch Function
The above precaution pertains to Input ‘F’ lockouts as well as the integral sample flow switch on input ‘E’.
If disabled or bypassed, the sensor would not be able to sense a hazardous situation and turn of the
chemical feed pumps to prevent uncontrolled chemical feed.
Test Flow Switch Function
If flow switch ‘float’ does not drop to the bottom and remain there during no-flow, backwash, or very low
flow conditions, the controller cannot prevent the uncontrolled feed of chemicals, which could cause
personal injury or death.
Testing of the flow switch periodically is essential to verify that low sample water flow will disable the feed
of chemicals. When flow to sensor housing is interrupted or, slowed below 10 gallons/hour, the controller
blue OK LED will start to flash and the LED status for each feeder will show “OFF:Interlocked E” within 2
NEVER OVERRIDE A FLOW SWITCH
Uncontrolled feeding of concentrated chemicals can result in personal injury
or death. Sample and recirculation flow switches are critical safety devices
which prevent uncontrolled chemical feed. Follow Instructions Carefully.
Flow switches are provided with all ProMinent pool controllers and are an
integral safety device to prevent the uncontrolled feed of chemicals, which
could cause personal injury or death. This critical safety device must always
be available to protect the swimmers and others near the pool.
Flow switches should NEVER be bypassed, even temporarily.
Test Flow Switches Weekly
Stop the flow of sample water to the
sensor housing to verify interlocks
are functioning.
Fully understand the implications of the control setpoints,
interlocks and alarms that you select.
Injury or damage to equipment may result from improper
configuration.
Unplug or turn OFF the AC power to the controller if you
have any concerns regarding safety or incorrect controller
operation, and notify supervisory staff.
Aquatic Water
Treatment Controllers
operate chemical
feeders and other
devices that may pump
hazardous, corrosive
and toxic chemicals.

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ELECTRICAL SURGES CAN DAMAGE YOUR
CONTROLLER
Uncontrolled feeding of chemicals can result in injury or death.
A damaged controller could feed chemicals in an uncontrolled
manner.
If you suspect your ProMinent controller is not operating properly,
disconnect it from the chemical feeders until the problem has been
corrected.
seconds. If not, plumbing corrections or the installation of additional safeguards will be necessary to avoid
dangerous uncontrolled chemical feed.
Chemical Feeders
Electrical Surges
ProMinent controllers, like all modern electronic devices can be damaged by severe electrical spikes and
surges, like lightning.Every effort has been made to harden your controller against such surges, but no
precautions are 100% effective. Additional surge protection can be installed at time of installation, but
even that is not a guarantee that surge damage will not occur. If surge damage occurs, chemicals could
be fed to your pool or spa, continuously with no safety controls. If you inspect your ProMinent controller
after a possibly damaging power surge (thunderstorm or power outage) and suspect the controller is not
operating properly, disconnect the chemical feeders at once, and contact your ProMinent dealer for
service.
NEVER CONNECT FEEDERS DIRECTLY TO POWER SOURCE
If the chemical feeders are connected to a wall outlet, the safety devices
integral to your ProMinent controller, and to the safe feeding of chemicals,
will be bypassed. It is very important that the chemical feeders be
connected to the controller and never directly to a wall outlet. If the
chemical feeders are connected to a wall outlet and feeding continuously,
when the flow of water to the pool stops due to filter backwash, the
circulation pump losing prime or other causes, potentially hazardous
concentrations of chemicals can be fed into a pool or spa. Follow
Instructions carefully to insure safe operation.
ALWAYS USE ANTI-SYPHON DEVICES
Uncontrolled feeding of chemicals can result in injury or death.
Anti-Syphon devices must be installed on chemical feeders to prevent
uncontrolled feed of concentrated chemicals.
If a vacuum is created in the water circulation line and no anti-siphon
device is installed on the chemical feeders, potentially hazardous
concentrations of chemicals can be drawn into pool or spa. Always use
injection check valves and anti-siphon valves in the chemical feed lines to
prevent this situation from occurring.

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Water disinfection
control involves
irritating, corrosive,
caustic, and potentially
toxic chemicals. Use
extreme caution and
comply with all national,
state and local
regulations and
recommendations for the
handling and storage of
these chemicals.
2 .2 System Mounting
Fully Assembled System on Acrylic Backpanel
•Locate an area on a flat wall large enough to accommodate the full size of the
18 x 30” acrylic system panel with enough extra room to
accommodate flexible sample tubing connections.
•NOTE: Location of the system should not be in the direct
sunlight if mounted outside, as this may cause false
temperature readings and can cause temperatures inside the
enclosure to exceed maximum temperature ratings of 120°F.
•The controller is shipped with a 3 ft. power cord already installed,
for easy connection to a close indoor wall receptacle.
Alternatively, you may choose, or be required by local electrical
code, to install conduit into the bottom of the controller enclosure.
Refer to the wiring section of this manual for enclosure opening
sizes and locations.
•Refer to dimensional drawings for location and spacing of pre-
drilled mounting holes, measure and mark these locations on the
wall.
•Approximate weight of the assembled system with water flowing,
may be in excess of 30 lbs., so take care to choose adequately
sized mounting hardware.
•NOTE: Spacers on the back of the acrylic panel, if present, are
not secured and can be easily removed from their groove, if
desired.
DO NOT INSTALL YOUR
CONTROLLER IN AREAS
ACCESSIBLE TO THE PUBLIC
WARNING!

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Individual Components
DCM2 Controller Enclosure Mounting
•Locate an area on a vertical wall where the controller can me mounted at approximately eye level and
have enough clearance to allow the DGMa modular sensor housing to be installed near and below the
controller. Avoid outdoor installations, especially in direct sunlight. The location of the DGMa sensor
housing must have about 18” of clearance above it to allow removal of the sensors, and about 12
inches below to access water sample petcock and a sample cup.
NOTE: a common mistake made at installation, is not allowing enough space above the sensor housing
to accommodate routine sensor maintenance.
•Individual DCM2 controllers
are shipped with mounting
bracket (4) and mounting
screws (1) to assist with wall
mount installation.
•Disconnect the bracket from
the back of the enclosure by
pressing the black plastic
release clip (4) at the
bottom, and slide the
enclosure down towards the
clip, then tip the bracket off
the back of the enclosure.
The wall mounting bracket
can then be used as a
drilling template as shown.
•Mount the bracket on a
vertical wall at approximately
eye level, within 30 in. of the
nearest 120VAC power
outlet. Alternatively, mount
near a power disconnect,
and wire the power directly
to the controller through
electrical conduit. Conduit
adaptor fittings are available
from ProMinent. Refer to local and national electrical codes for wet locations.
•Fasten enclosure securely to the bracket as shown, by hanging enclosure on the bracket, pushing
the enclosure against wall and lifting until the enclosure snaps securely to the bracket.
•After controller is mounted, time is best used mounting the DGMa modular sensor housing to
allow sensors to equilibrate while the remainder of the installation, wiring and configuration is
performed.

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2.2.1. Sample Connections
Modular Sensor Housing (DGMa)
•When shipped separately, the DGMa Sensor housing is mounted to a small white acrylic
backpanel.
•Mount plate within 60” of the DCM2 controller, and allow at least 18” clearance above the top of
the mounting plate. Do not mount in direct sunlight as this will promote algae growth and create
temperature swings not representative of the pool or spa under control.
•Using the typical installation drawings on the following pages, connect sample tubing to the DGMa
modular sensor housing and the main recirculation lines, using the fittings supplied.
NOTE: The default mounting of the modular
housing is to flow from left to right (note the flow
direction molded into each module).
•If preferred, the modular housing is
reversible by removing the assembled
modules from the black upper snap clips.
•First disconnect the spacer standoff
brackets and pull the module assembly to
unsnap it from the upper clips.
•Once it is loose, simply flip the assembled
modules so that the molded arrows on the
modules are pointing right to left,
•Then reconnect it to the standoff brackets
and remount onto the backpanel.
Adjustment of the standoff brackets
mounting screws may be needed.
•Next, use the typical installation drawing
below as a guide, and connect the sample
supply and return tubing using the selection
of fittings supplied.
NOTE: Keep in mind that a very small sample volume (11-12 GPH) is needed for ProMinent
controllers. That is only (0.18 GPM) compared to other aquatic controllers requiring 1-3 GPM.
Sensor sample should always be taken from downstream of the filter, but up stream of UV or
Ozone treatment system, heater and any chemical injection. Discharge sample into the line
returning to the pool or spa as close to the pool as possible to get the maximum pressure
differential. Using the pressure drop created by other devices like heaters or the UV system works
best.
CAUTION: Never take the sensor sample from unfiltered water as this may introduce hair or other debris into the
flow switch and sample cell. Never return sample to the suction side of the recirculation pump as this will cause a
negative pressure environment (vacuum) for the sensors, which will cause non-warranty damage to the sensors,
and more importantly, will cause erroneous readings and poor water quality control.