IPS Controllers M720 User manual

M720 pH/ORP Controller
Owner’s
Manual
ipscontrollers.com
pH
Dose
Alert
Dose
Alert
ORP mV
FlowAuto pH ORP
IPS-M720
AC PowerpH ORP Flow
pH
ORP
Up
MODE
Down Set
Level
Dose
Time
Delay
Time
pH
Cal

Table of Contents
I. Introduc on page 2
A. Water Chemistry page 2
B. Safety page 3
C. System Components page 4
D. Speci ca ons page 7
E. Controller Panel Descrip ons page 8
F. Electrical Descrip ons page 10
II. Installa on page 11
A. Setup page 11
B. Tools page 11
C. Procedure page 11
III. Opera on page 14
A. Startup and Shutdown page 14
B. Modes and Adjustments page 15
C. Maintenance page 23
IV. Troubleshoo ng page 25
V. Warranty page 28
1

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 and TDS’ that can increase the
negave impacts of unbalanced water.
2
M720 pH/ORP Controller Owner’s Manual

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.
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.
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.
3
M720 pH/ORP Controller Owner’s Manual

C. System Components
1. IPS M720 pH/ORP Controller
a. Allows automac monitoring of pH and ORP levels 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.
In addion, ve separate funcon buons allow simple
pushbuon control of these individual parameters:
1) Mode - Auto or pH Standby (programming),
2) Set Level - pH level to be maintained,
3) Dose Timer - Timed or Connuous feed modes,
4) Delay Time - Delay period aer each Dose Time,
5) pH Cal - pH calibraon.
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.
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
M720 controller to monitor the pH and ORP levels in the
water.
4
M720 pH/ORP Controller Owner’s Manual

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 – for tapping installaon of ow cell input/output
5. In-line Filter – installed prior to ow cell to protect ow switch
and sensors
6. Tubing – 25 feet of 3/8” for providing ltered water to and from
the ow cell
7. Mounng Board – ABS plasc with mounng holes and
stainless hardware (16” x 12” standard, 24” x 19” oponal)
8. Chemical Feeders – peristalc pumps for pH and ORP control
(purchased separately)
5
M720 pH/ORP Controller Owner’s Manual

Figure 1: This is a typical installa on using IPS’ system package, which consists of an
M720 pH/ORP Controller,  ow cell with switch, and two pumps mounted on the large board.
6
M720 pH/ORP Controller Owner’s Manual
Chemical
Pump


 




Pump



Sample
Typical Installa�on






FC100G  SXPH Valve    
1  3  5 6 7 8

 
  



 (6
           
IPS Parts List


ipscontrollers.com
pH
Dose
Alert
Dose
Alert
ORP mV
FlowAuto pH ORP
IPS-M720
ACPowerpH ORP Flow
pH
ORP
Up
MODE
Down Set
Level
Dose
Time
Delay
Time
pH
Cal

D. Specicaons
Enclosure: 6.375”L x 4.75”W x 3.5”D (Note: Mounng board
dimensions are 16”L x 12”W x 0.25”D)
Electrical Input/Output: 110/230 VAC, 50 - 60 Hz
pH Set Level: 7.0 to 8.0
ORP Set Level: 400 mV to 900 mV
Dose Time: O, Connuous, or Timed cycle
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
7
M720 pH/ORP Controller Owner’s Manual

E. Controller Panel Descrip ons
1. Digital Displays and Func on LEDs
a. pH
1. Alert - red LED
2. Dose - green LED
b. ORP
1. Alert - red LED
2. Dose - yellow LED
Figure 2: M720 Controller Components Connec ons
8
M720 pH/ORP Controller Owner’s Manual
Electrical
Flow Cell
digital display
pushbutton
LEDs
Controller Communication
ipscontrollers.com
pH
Dose
Alert
Dose
Alert
ORP mV
FlowAuto pH ORP
IPS-M720
AC PowerpH ORP Flow
pH
ORP
Up
MODE
Down Set
Level
Dose
Time
Delay
Time
pH
Cal

2. Mode - pushbuon adjustments
a. Auto - red LED
b. pH standby - green LED
c. ORP standby - yellow LED
d. OFF mode - In standby, press and hold Mode buon for 3
seconds to turn controller o.
3. Flow - green LED
4. Up/Down buon to adjust the following:
• Set Level
• Dose Time
• Delay Time
• pH Cal
5. Electrical Connecons (peripherals)
a. pH output (le receptacle) - max. 5 amps @ 110/230 VAC
b. ORP output (right receptable) - max. 5 amps @ 110/230
VAC
c. AC power - 110/230 VAC, 50-60 Hz
d. Flow - from ow cell
e. pH sensor - BNC connecon
f. ORP sensor - BNC connecon
9
M720 pH/ORP Controller Owner’s Manual

F. Electrical Descrip ons
1. Power
a. 110/230 VAC, 50-60 Hz, 3-wire grounded NEMA 5 power
cord. GFCI source required.
2. Dip Switches (1-4)
a. 1: pH/ORP interlock (default: OFF)
No ORP feed if pH is feeding (ON).
b. 2: pH/ORP alert interlock (default: ON)
No ORP if pH is in alert mode (ON).
c. 3: Acid/Base default acid (default: OFF)
1. Feed base chemical when pH level falls below set point.
(ON)
2. Feed acid chemical when pH above set point. (OFF)
d. 4: Over Timer ON/OFF (default: ON)
Note: Turning o the Over Timer will void any NSF Cer  -
ca on.
Figure 3: Dipswitches
10
M720 pH/ORP Controller Owner’s Manual

II. Installaon
A. Setup
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. Masonry drill bit and anchors, or other appropriate fasteners
5. 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
Note: The controller and ow cell are factory mounted to the ABS
board for convenience.
a. Securely mount ABS mounng board with M720 controller
and ow cell on wall (vercal installaon).
b. If applicable, securely aach the peristalc pump with the
provided hardware.
11
M720 pH/ORP Controller Owner’s Manual

c. Drill a 7/16” hole and tap a 1/4” NPT port to a locaon
downstream from the lter and upstream from any
chemical introducon points. Install a tubing connector
(included) 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.
d. Drill a 7/16” hole and tap a 1/4” NPT port to a locaon that
is subject to vacuum or reduced pressure. Install a tubing
connector (included) 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.
e. 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 M720 controller power is OFF.
b. Carefully 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 their
corresponding 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.
12
M720 pH/ORP Controller Owner’s Manual

4. Electrical Connecons (Should be completed by a licensed
Electrician)
a. Verify that the M720 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.
d. Connect the AC power cord to a GFCI power source. For
outdoor installaons, ensure the use of a waterght outlet
cove r.
e. Connect the blue pH sensor connector to the
corresponding port (labeled pH) at the right edge of the
controller.
f. Connect the yellow (or green) ORP sensor connector to the
corresponding port (labeled ORP) at the right edge of the
controller.
13
M720 pH/ORP Controller Owner’s Manual

III. Operaon
A. Startup and Shutdown
1. Startup
a. Plug M720 power cord into power outlet. For outdoor
installaons, ensure the use of a waterght outlet cover.
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 10 minutes to allow for
accurate, stable readings of pH and ORP levels from the
pool or spa.
c. Check for leaks and repair if necessary.
d. Manually adjust and balance the pool or spa water to
acceptable ranges using a DPD-based test kit.
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.
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.
14
M720 pH/ORP Controller Owner’s Manual

h. Press the Mode pushbuon momentarily to place the
controller in ORP standby mode. The yellow ORP standby
LED will illuminate. Select the desired ORP 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, 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 Standby to ORP Standby, 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 M720 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.
B. Modes and Adjustments
1. Auto
a. This is the normal operaonal mode of the M720
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.
d. The red funcon LED next to Auto is illuminated.
e. pH and ORP digital displays monitor the sensor input
levels.
15
M720 pH/ORP Controller Owner’s Manual

2. pH standby
Note: While in this mode, the green pH standby LED will
illuminate, both the pH and ORP digital displays will show
dashes, and all Auto funcons will be disabled. When a funcon
pushbuon is pressed, the corresponding digital display will show
the funcon.
a. Set Level
1. Default: 7.4 pH
2. Selectable range: 7.0 – 8.0 pH (in 0.1 increments)
b. Dose Time
1. Default: Timed dose of 10 second pH feed relay
energized and 5 minutes pH feed relay de-energized.
In the med dose cycle mode, the Dose LED will ash
while dosing and illuminate steadily during the delay
poron of the med cycle. In connuous dose mode,
the Dose LED will ash while dosing.
2. Selectable range: OFF, CON (connuous), and Timed
(0.6 – 900 seconds ON and 5 minutes OFF)
c. Delay Time
1. Default is a 5-minute delay aer dosing
2. Selectable range 1 – 99 minutes
d. Over Timer
1. Preset: 60 med cycles or 60 minutes in connuous
feed.
2. Selectable range in med feed: OFF, 20 – 100 feed
cycles. Selectable range in connuous feed: OFF, 20 –
180 minutes.
3. Changing Over Timer seng
i. Press Mode buon to enter pH standby
ii. Press and hold Mode buon and then press Delay
Time buon (red pH alert LED will come on) release
both buons. You are now in Set Over Timer mode.
16
M720 pH/ORP Controller Owner’s Manual

17
M720 pH/ORP Controller Owner’s Manual
iii. Use Up/Down buon to increase/decrease Over
Timer
iv. When nished, press Mode buon to connue
4. The Over Timer is interlocked with the Dose Time
selecon.
i. If the Dose Time is set to a med cycle, the Over
Timer will count med feed cycles. Every me the
set level is reached the mer will reset its count. If
the preset cycle is reached, the pH digital display will
ash, and the pH output relay will de-energize. The
controller must be reset manually by cycling out of
and back into Auto mode using the mode buon.
(Default: 60 cycles)
ii. If the Dose Time is set to a connuous feed mode,
the Over Timer will count in minutes. (Default: 60
minutes)
5. When the Dose Time is changed from either med or
connuous feed, the Over Timer is reset to Default.
e. High Alert - Default: 8.0 pH
1. Default: 8.0 pH
2. Selectable range: OFF, 7.5 pH to 8.4 pH (acid feed). A
high alert will occur if the pH level remains above the
High Alert level for 10 connuous minutes, and will
automacally turn o the High Alert when the pH level
falls below the high alert level for 1 connuous minute.
During High Alert, the pH dose output will be disabled.
3. Changing High Alert seng
i. Press Mode buon to enter pH standby
ii. Press and hold Mode buon and then press Set Level
buon (red pH alert LED will come on) release both
buons. You are now in Set Alerts mode.
iii. Press Set Level buon again to display current High
Alert

iv. Use Up/Down buon to increase/decrease pH High
Alert
v. When nished, press Mode buon to connue
f. Low Alert
1. Default: 7.0 pH
2. Selectable range: OFF, 6.8 pH to 7.4 pH (acid feed). A
low alert will occur if the pH level remains below the
Low Alert level for 10 connuous minutes, and will
automacally turn o the Low Alert when the pH level
rises above the low alert level for 1 connuous minute.
During Low Alert, the pH dose output will be disabled.
3. Changing Low Alert seng
i. Press Mode buon to enter pH standby
ii. Press and hold Mode buon and then press Set Level
buon (red pH alert LED will come on) release both
buons. You are now in Set Alerts mode.
iii. Press Dose Time buon to display current Low Alert
iv. Use Up/Down buon to increase/decrease pH Low
Alert
v. When nished, press Mode buon to connue
3. pH Cal
1. Allows pH reading to be adjusted .9 pH up or .9 pH
down from actual sensor reading.
2. Default: 0 pH adjustment
3. To clear all calibraon that may have been entered:
i. Press Mode buon to enter pH standby
ii. Press and hold Mode unl the controller turns o.
iii. Press and hold the pH Cal buon and then the Mode
buon unl the controller turns on. Release both
buons.
iv. Press the Mode buon to connue back to Auto to
see the reading without calibraon.
18
M720 pH/ORP Controller Owner’s Manual

19
M720 pH/ORP Controller Owner’s Manual
4. ORP standby
Note: While in this mode, the yellow ORP standby LED will
illuminate, both the pH and ORP digital displays will show
dashes, and all Auto funcons will be disabled. When a funcon
pushbuon is pressed, the digital display will show the funcon.
a. Set Level
1. Default: 650 mV
2. Selectable range: 400 mV to 900 mV (in 5 mV
increments)
b. Dose Time
1. Default: 10 second ORP feed relay energized and 5
minutes ORP feed relay de-energized (med Dose
Time). In the med dose cycle mode, the dose LED will
ash while dosing, and will illuminate steadily during
the delay poron of the med cycle. In connuous dose
mode, the dose LED will ash while dosing.
2. Selectable range: OFF, CON (connuous), and Timed
(0.6 to 900 seconds ON and 5 minutes OFF)
3. Delay Time
i. Default is a 5-minute delay aer dosing
ii. Selectable range 1 – 99 minutes
c. Over Timer
1. Default: 60 Cycles med feed, 60 minutes connuous
feed
2. Selectable range in med feed: OFF, 20 – 100 feed
cycles. Selectable range in connuous feed: OFF, 20 –
180 minutes.
3. Changing Over Timer seng
i. Press Mode buon to enter ORP standby