IPS Controllers M920 User manual

M920 & M920W
pH/Dual ORP Controller
Owner’s
Manual

M920 & M920W pH/Dual ORP Controller Owner’s Manual
1
Table of Contents
I. Introducon     2
A. Water Chemistry 2
B. IMPORTANT SAFETY INSTRUCTIONS 3
C. System Components 4
D. Speci ca ons 7
E. Controller Panel Descrip ons 8
F. Electrical Descrip ons 10
II. Installaon      11
A. Setup 11
B. Tools 11
C. Procedure 11
D. Connec on Requirements for Remote Connec ng 15
III. Operaon      17
A. Overview 17
B. Startup and Shutdown 17
C. Modes and Adjustments 18
D. Maintenance 26
IV. IPS-M920 Wi-Fi Setup 28
A. Smart Phone Wi-Fi Setup 28
B. Desktop/Laptop Wi-Fi Setup 30
C. Remote Monitoring Setup 32
V. Troubleshoong     34
VI. Warranty      37

M920 & M920W pH/Dual ORP Controller Owner’s Manual
I. Introducon
A. Water Chemistry
Water chemistry is a complex science that contains many variables.
These variables not only aect the water environment itself, but they
can have adverse eects on your equipment as well as your health.
These are only some of the factors which we follow closely to ensure the
most healthy water interacons:
pH is the measurement of the acidity or basicity in an aqueous soluon.
A measurement below 7 is considered acid, while a measurement above
7 is base or alkaline. It is a signicant factor in determining the water
quality as it aects sanizer levels, water color, and human reacon to
the water.
ORP (Oxidaon Reducon Potenal) is the measurement of the oxidizing
capacity present in water. ORP cannot be fooled by the eects of pH,
total dissolved solids (TDS), stabilizers, and non-chlorine oxidizers.
A typical ORP sensor measures Hypochlorous Acid (HOCI), which is
the more eecve component of free chlorine. A higher ORP reading
equates to the sanizer working more eecvely.
Water balance is comprised of pH, calcium hardness, total alkalinity,
temperature, and TDS. When water is balanced, the Langelier Saturaon
Index is 0. Values above +0.3 lead to scaling and cloudy water, while
values below -0.3 can cause corrosion of pool equipment and surfaces. If
the water balance is not xed in a mely manner, secondary eects can
lead to rapidly declining water condions that can aect the health of
the water occupants.
pH and ORP work conversely to one another, and are aected by other
factors such as temperature, Cyanuric Acid, and TDS that can increase
the negave impacts of unbalanced water.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
3
B. IMPORTANT SAFETY INSTRUCTIONS
1. READ AND FOLLOW ALL
INSTRUCTIONS.
2. Risk of electric shock: Connect the controller to a dedicated ground-
fault circuit interrupter (GFCI) circuit breaker.
a. A green colored terminal or a terminal marked G, GR, Ground,
Grounding, or the symbol* is located inside the supply
terminal box or compartment. To reduce the risk of electrical
shock, this terminal must be connected to the grounding means
provided in the electrical supply service panel with a connuous
copper wire equivalent in size to the circuit conductors
supplying this equipment.
*IEC Publicaon 417, Symbol 5019.
3. Disconnect power before servicing the controller.
4. Inspect all power cords frequently. Any damaged cords should be
replaced immediately to reduce the risk of injury by shock.
5. Always maintain a record of manual water chemistry readings using
an accurate test kit. Automated controllers are not a substute for
this Health Department requirement.
6. WARNING – To reduce the risk of injury, do not permit
children to use this product unless they are closely supervised at all
mes.
7. Danger – Risk of injury.
a. Replace damaged cord immediately.
b. Do not bury cord.
c. Connect to a grounded, grounding type receptacle only.
8. WARNING – Risk of electric shock. Install at least 5 feet
(1.5m) from inside wall of water enclosure using non-metallic
plumbing.
9. Operaon of this controller without a funconing ow-switch will
void the NSF Cercaon.
10. WARNING – Do not install this controller where it is
accessible to the public.
11. SAVE THESE INSTRUCTIONS.

M920 & M920W pH/Dual ORP Controller Owner’s Manual
C. System Components
1. IPS M920 pH/Dual ORP Controller
a. Allows automac monitoring of water sanizaon and pH
balance through a simple, user-friendly interface, resulng in
easier management of water balance in swimming pools, spas,
or circulang water environments.
b. Can be easily installed into your exisng pool environment and
equipment, or can be customized to your needs.
c. Monitors and displays the pH and ORP levels using LEDs and
digital readouts on the front panel. If the temperature sensor is
installed, the M920 will monitor temperature and display on the
front panel when in Temp mode. Addionally. it will monitor up
to two chemical tanks equipped with level switches and displays
status using LEDs on the front panel.
There are six separate funcon buons that allow simple
pushbuon control of these individual parameters:
1. Set Level – ORP or pH level to be maintained,
2. Dose Time – Timed or connuous feed modes,
3. Delay Time – Delay me between feed cycles,
4. Over Timer – Maximum feed cycles or me allowed,
5. High Alert – Maximum level of ORP or pH allowed,
6. Low Alert – Minimum level of ORP or pH allowed,
7. pH Cal – pH calibraon for variaon in pH sensors.
d. When the pH level rises above (acid feed) or falls below (base
feed) the set level, the controller will acvate the chemical
feeder for the set dose me. Then the set delay me will occur.
This dose and delay me will occur unl the set level is reached.
e. When the ORP (sanizer) level reaches the set level, the
controller will acvate the chemical feeder for the set dose me.
Then the set delay me will occur. This dose and delay me will
occur unl the set level is reached.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
2. Flow Cell with Flow Switch
a. An injecon-molded ow cell with integrated ow
switch houses the pH and ORP sensors, and partners with
the M920 controller to monitor the pH and ORP levels in
the water.
b. The ow switch veries that water is owing during a feed cycle,
and sends the controller instrucons to deacvate the feed if
water is not owing.
c. Operaon of this controller without a funconing ow-switch
will void the NSF Cercaon. Rounely check that the ow-
switch is funconing by closing the le valve on the boom of
the ow-cell (ow light should turn o).
3. pH and ORP Sensors
a. pH Sensor – standard (Use only IPS Controllers part # SXPH to
maintain NSF Cercaon)
b. ORP Planum Sensor – standard (Use only IPS Controllers part #
SXORP to maintain NSF Cercaon)
c. ORP Gold Sensor – for use with Salt Chlorine systems (Use only
IPS Controllers part # SXORP-G to maintain NSF Cercaon)
4. Fings – tubing connectors (2) for tapping installaon of ow cell
input/output
5. In-line Filter with 2-way valves and mounng clamps (2)
6. Tubing – 25 feet of 3/8”
7. Mounng Board – ABS plasc with mounng holes and stainless
hardware (16” x 12” standard, 24” x 19” oponal for mounng two
chemical pumps)
8. Temperature Sensor – Senses the current water temperature and
displays the temperature in the display when in Temp mode.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
Figure 1: This is a typical installa on using IPS’ system package, which consists of an
M920 pH/dual ORP Controller,  ow cell with switch, and two pumps mounted on the large board.
6
Chemical
Pump
Chemical
Pump
Flowcell (1)
Sucon Line
FLOW
FLOW
FLOW
Effluent (to Sucon)
Waste
Influent (to Return Line)
Filter
Pump
FLOW
Filter
(10)
(aach to pipe with clamps)
FLOW
FLOW
Sample
pH sensor (3)
ORP
Sensor
(4)
Typical Installaon
Note: All chemical must be injected downstream from
the heater and flowcell.
Main Drain and Skimmer
Pressure Differenal
Return Line
FC100G FLSW SXPH SXORP SXORP-G Valve Jaco Fing 1/2” Jaco Fing 1/4” 38tubing Filter
1 2 3 4 5* 6 7 8 9 10
Flow Cell, Complete Flow Switch Only pH Sensor ORP Sensor (Standard Planum Tip) ORP Sensor (Gold-Tip for Salt Pools) 2-way Flow Cell Valve 1/2” Jaco fing for sensors 1/4” Jaco fing for tubing 3/8” tubing for plumbing to/from Flow Cell Filter Strainer
IPS Parts List
Flow Switch (2) 1/2” Jaco Fing (7)
38tubing (9)
Valve (6)
* not shown
1/4” Jaco Fing (7)

M920 & M920W pH/Dual ORP Controller Owner’s Manual
D. Specicaons
Enclosure: 7.95”L x 5.98”W x 3.54”D
Electrical Input/Output: 120/240 VAC, 50 - 60 Hz
ORP Set Level: 400 mV to 900 mV
pH Set Level: 7.0 to 8.0
Dose Time: O, Connuous, or Timed cycle
Delay Time: 1 - 99 minutes
Over Timer: O, 20-100 med cycles, or 20-180 connuous minutes,
default of 60
High Alert: pH default of 8.0, ORP default of 900
Low Alert: pH default of 7.0, ORP default of 100
Readout: Funcon LED and numerical digital displays
Alarm: Red alert LEDs with oponal external audible/visible alarm
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
E. ControllerPanelDescripons
1. Digital Displays and Func on LEDs
a. pH
1. Alert (High/Low) - red LED
2. Dose - green LED
3. Flashing Leds - Over Timer Alert
b. ORP
1. Alert (High/Low) - red LED
2. Dose 1 - yellow LED
3. Dose 2 - yellow LED
4. Flashing LEDs - Over Timer Alert
Figure 2: M920 Controller Components Connec ons
8
Electrical
Connec�ons
Flow Cell
Connec�ons
digital display
pushbutton
LEDs
Controller Communication
pH
pH
ORP
AC
Power
ORP2
ORP1
Flow
Switch
Temp
Sensor
Accessory

M920 & M920W pH/Dual ORP Controller Owner’s Manual
2. Mode - pushbuon adjustments
a. Auto - red LED
b. pH standby - green LED
c. ORP1 standby - yellow LED
d. ORP2 standby - yellow LED
e. Temp display & calibrate - green LED
f. OFF mode - In standby, press and hold Mode buon for 3 seconds
to turn controller o. There is sll power to the controller in
this mode, but no dosing will occur. Press and hold to turn the
controller back on.
3. Up/Down Arrows - pushbuon adjustments of following:
• Set Level
• Dose Time
• Delay Time
• Over Timer
• High Alert
• Low Alert
• pH CalFlow
4. Flow - green LED
5. Tank 1 - red LED
6. Tank 2 - red LED
7. Electrical Connecons (peripherals)
a. pH output (le receptacle) - max. 3.3 amps @ 110/230 VAC max
b. ORP1 output (center receptacle)- max. 3.3 amps @ 110/230 VAC
max
c. ORP2 output (right receptacle) - max. 3.3 amps @ 110/230 VAC
max
d. AC power - 120VAC/240 VAC (switchable), 50-60 Hz
e. AC power protecon - Fused at .500 Amps (500 mA)
f. Flow - from ow cell
g. Tank 1 - from tank level switch (oponal)
h. Tank 2 - from tank level switch (oponal)
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
i. External audible/visible alarm (oponal)
j. pH sensor - BNC connecon
k. ORP sensor - BNC connecon
l. Oponal dry contact ORP1 output (contact factory for
instrucons)
F.ElectricalDescripons
1. Power
a. 120 VAC, 50-60 Hz, 3-wire grounded NEMA 5 power cord. GFCI
source required. Note:TFor240VAC,ahardwireconneconis
required.Useonly18AWGstrandedcopperwire.Thecon-
troller’spowersupplywillautomacallydetecttheincoming
power and will output the same power to your devices. All
outputdevices(feeders)mustmatchincomingvoltage.
2. Dip Switches (1-4)
1: pH/ORP interlock (default: OFF)
• No ORP1 or ORP2 feed if pH is feeding (ON).
2: pH/ORP alert interlock (default: ON)
• No ORP1 or ORP2 feed if pH is in alert mode (ON).
• No interlock (OFF)
3: Acid/Base default acid (default: OFF)
• Feed base chemical when pH level falls below set point. (ON)
• Feed acid chemical when pH above set point. (OFF)
4: Not in use.
Figure 3: Dipswitches
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
II. Installaon
A. Setup(Installaonvideoavailableatipscontrollers.com)
1. Turn o all peripheral equipment such as heaters, chemical feeders,
and pumps.
2. Relieve pressure from the ltraon system.
B. Tools
1. Cordless drill
2. 1/4” NPT Tap
3. 7/16” drill bit
4. 1/4” or 3/8” drill bit for Temp Sensor (oponal)
5. Masonry drill bit and anchors, or other appropriate fasteners
6. 13/16” wrench or channel-lock pliers
C. Procedure
1. Locaon
a. Wall area with easy access
b. Within 8 feet of feeder
c. At least 10 feet from water edge
d. Close proximity to me clock
e. Within 6 feet of GFCI power source
2. Mounng
a. Controller and ow cell are factory-mounted to ABS board for
your convenience.
b. Securely mount ABS mounng board with M920 controller and
ow cell on wall (vercal installaon).
c. If applicable, securely aach the peristalc pumps to the
oponal larger ABS mounng board with the provided
hardware.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
d. Drill a 7/16” hole and tap a 1/4” NPT port to a locaon down-
stream from the lter and upstream from the heater and any
chemical introducon points. Install a tubing connector and ex
tubing to be connected to the le side ow cell port containing
the ow switch. The in-line lter will also be installed in this line
and mounted to a horizontal pipe with band clamps (included).
Note: Verifythatthelterisinstalledwithdireconalarrows
poinnginthedireconoftheow.
e. Drill a 7/16” hole and tap a 1/4” NPT port to a locaon that is
subject to vacuum or reduced pressure (aer heater). Install a
tubing connector and ex tubing to be connected to the right-
side ow cell port. Note:Werecommendthatthistubing
connectorbeinstalledintothedrainholeonthesuconside
of the pump for best performance.
f. Cut a 3” - 6” length of ex tubing and insert into the ow cell’s
sample stream port (center).
3. pH and ORP Sensors
Note: Carefully unpack the pH and ORP sensors and set aside in a clear
areaunlreadytoinstallintotheowcell.
a. Verify that the M920 controller power is OFF.
b. Remove the plasc protecve caps from the sensors and store in
a separate locaon for future re-use.
c. Slide the glass end of each sensor (pH and ORP) into one of the
compression ngs located at the top of the ow cell. Ensure
that the p is submerged into the water to within 1/2” from the
boom of the ow cell. Hand ghten each nut ng.
4. Temperature Sensor (oponal)
a. Drill a 3/8” inch hole aer the lter and before the heater.
b. Insert the temperature sensor into the drilled hole and secure
with a band clamp (included).
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
c. Run the sensor cable into the controller through the strain relief
marked “temp” and connect to the terminal block on the front
circuit board marked “Temp”.
5. Electrical Connecons (Should be completed by a licensed
electrician)
a. Verify that the M920 controller power is OFF.
b. Connect the pH feeder connecon to the appropriate peristalc
pump or other device.
c. Connect the ORP feeder connecon to the appropriate
peristalc pump or other device. Note: There is another
conneconportforORP2.
d. Method 1 (recommended): Connect the AC power cord to the
load-side of the circulaon pump circuit. This will only provide
power to the M920 when the circulaon pump is running.
e. Method 2: Connect the AC power cord to a GFCI power source,
or separately purchased IPS Controllers PressureSwitch (part #
PS100).
f. Connect the pH sensor connector to the corresponding lower
port (labeled pH) at the right edge of the controller.
g. Connect the ORP sensor connector to the corresponding upper
port (labeled ORP) at the right edge of the controller.
6. Chemical injecon must be inserted in the return line, aer
(downstream) any equipment.
7. Oponal connecon to a Salt Chlorine Generator (SCG)
The M920 controller is capable of controlling (turning on/o) a SCG
depending on the current ORP reading. This acon can be accomplished
using a 120V or 240V relay, or by connecng the SCG to the “normally
open” dry contact relay (ORP1) included with the M920 controller. When
using the ORP1 Dry Contact Relay, the black plasc jumper idened as
HD2 needs to be reposioned from the lower posion (see Figure 4) to
the open pegs at the top.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
14
8. Conver ng from Cord to Permanent Connec on
a. Remove cover.
b. Loosen strain relief gland from AC cord.
c. Using a 3/32” (2.44mm) slot screw driver, carefully loosen
terminals that a ach the AC cord to the controller box.
d. Remove the AC cord.
e. Replace the AC cord with a minimum jacketed cord of 18/3 AWG
SW 105º 900 V, then carefully hand- ghten the terminals on the
strain relief gland. Note: For liquid  ght installa on connec ons,
replace the strain relief gland with a liquid  ght connector and
use a minimum stranded wire gauge of 18 AWG 105º 600 V (do
not use solid conductor) for each conductor: Black (hot), White
(common), and Green (ground).
Important:
The minimum allowable conductor size is 18 AWG
with an ampacity of 10 AMPS, and a ground fault
interrupt circuit breaker of 15-20 AMPS.
Use stranded copper wire only.
Figure 4: HD2 Jumper
9. Con nue to the next sec on for the connec on requirements for
remote monitoring. The remote monitoring module and the Internet
are needed to complete this process.

M920 & M920W pH/Dual ORP Controller Owner’s Manual
D. ConneconRequirementsforRemoteMonitoring
1. IPS-M920W (Wi-Fi)
The remote monitoring module used with the IPS-M920W is a Wi-Fi
device which will access an exisng Wi-Fi network to send controller
data to the central monitoring website.
If an exisng Wi-Fi network is not available, a MiFi or “cellular hotspot”
can be added (contact a local wireless provider).
Note: The Ethernet connector on the M920W is disabled and cannot be
used.
a. How it works:
The remote monitoring module is programmed to “wake
up” at a customer-determined interval (minutes) to send all
current readings, sengs, and alerts to IPS Controllers’ remote
monitoring website.
Because the data is being sent to the website rather than the
website pulling the data from the module, the port is not le
open and a stac IP Address is not needed. This should address
any concerns regarding rewall security.
When changes are made to the controller sengs remotely,
the new sengs are delivered back to the remote monitoring
module on its next scheduled connecon.
b. Setup - Go to Secon IV-A on Page 28 for installaon
instrucons.
2. IPS-M920 (Hardwire)
The remote monitoring module included with the IPS-M920 requires:
• An Ethernet connecon provided by a hard wire directly from a
router,
• A Wi-Fi to Ethernet Adapter,
• Or a Cellular Modem (requires carrier service such as Verizon or
AT&T).
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
The provided connecon must allow the remote monitoring module to
access the Internet without providing any usernames, passwords, etc.
via Port 80 for outbound data only.
The best test for this ability is to connect a laptop to the Ethernet
cable and open a web browser. If the browser can open directly to the
web without credenals, the connecon will funcon properly for the
remote monitoring module (laptop Wi-Fi should be turned o when
doing this test).
a. How it works:
The remote module is programmed to “wake up” at a customer
determined interval (minutes) and send all current readings,
sengs, and alerts to the IPS Controllers remote monitoring
website.
Because the data is being sent to the website rather than the
website pulling the data from the module, the port is not le
open and a stac IP Address is not needed. This should address
any concerns regarding rewall security.
When changes are made to the controller sengs remotely,
the new sengs are delivered back to the remote monitoring
module on its next scheduled connecon.
b. Setup - Go to Secon IV-B on Page 30 for installaon
instrucons.
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M920 & M920W pH/Dual ORP Controller Owner’s Manual
17
III. Operaon
A. Overview
The IPS-M920 compares the readings received from the Ph and ORP
sensors to the Set Levels entered for Ph, ORP1, and ORP2. If the readings
are too low or too high, the controller will turn on the feed devices for
the Dose Time entered during set up. Other sengs are used to ne
tune the delivery of chemical, as well as prevent over and under dosing.
B. Startup and Shutdown
1. Startup
a. Provide power to the M920 using either Method 1 or 2 as
discussed in step 5d or 5e on page 13.
b. Turn on the lter pump and verify the water ow through
the ow cell by opening the sample port valve (center) and
observing a steady stream of water. The right side valve may
need to be parally closed to produce a steady stream. Note:
Water should pass over the pH and ORP sensors for a minimum
of5minutestoallowforaccurate,stablereadingsofpHand
ORPlevelsfromthepoolorspa.ORPreadingsmaytakelonger
to stabilize.
c. Check for leaks and repair if necessary.
d. Manually adjust and balance the pool or spa water to acceptable
ranges using a test kit. Note(s):1.UseaDPDbasedtestkitto
checkthechlorinelevel.2.CyanuricAcid(Condioner)levels
shouldnotexceed30ppmforbestresults.
e. Verify that the green Flow LED is illuminated. Both the pH and
ORP dose outputs are disabled if there is no water ow.
f. Press the Mode pushbuon momentarily to place the
controller into the pH standby mode. The green pH standby
LED will illuminate. Select the desired pH set level and dose
me (connuous or med). Please call us at 877-693-6903 for
assistance with inial sengs.

M920 & M920W pH/Dual ORP Controller Owner’s Manual
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g. While sll in the pH standby mode, press the pH Cal pushbuon
to calibrate the reading to the value observed through the
manual tesng of the water. Note:Alwayscalibrateusingwater
fromthesampleportoftheowcell.
h. Press the Mode pushbuon momentarily to place the controller
in ORP1 standby mode. The yellow ORP1 standby LED will
illuminate. Select the desired ORP1 set level and dose me
(connuous or med). Please call us at 877-693-6903 for
assistance with inial sengs.
i. Press the Mode pushbuon momentarily unl the red Auto LED
is illuminated. Note: If pH level in the pool is at desired set level
andchlorine/brominelevelisatdesiredPPMlevelinthepool,
then the ORP set level should be the same as the current ORP
readingwheninAutoMode.
2. Shutdown
Note:EachmetheModepushbuonismomentarilypressed,the
modewillcyclefromAutotopHtoORP1toORP2,Temp,andthen
return to Auto mode.
a. Press the Mode pushbuon momentarily to place the controller
in pH standby mode. The green pH standby LED will illuminate,
and both the pH and ORP digital displays will show dashes.
b. Press and hold the Mode pushbuon for 2 seconds unl both
the pH and ORP digital displays read OFF.
c. Release the Mode pushbuon. The M920 controller will turn
o, and the digital displays and funcon LEDs will go blank. The
green Flow LED will be illuminated if water is owing through
the ow cell.
C. Modes and Adjustments
1. Auto
a. This is the normal operaonal mode of the M920 controller.
b. The controller allows full operaon and monitoring of both pH
and ORP levels.
c. No funcon pushbuons are operaonal in this mode.