MegaTron Manual - Advantage Controls
Manual
MegaTron
Controller
Installation
Maintenance
Repair
Manual
Advantage Controls
P.O. Box 1472
Muskogee, OK 74402
Phone: 800-743-7431
Fax: 888-686-6212
www.advantagecontrols.com
email: [email protected]
1
03/2017
MegaTron Controller
Instruction & Maintenance Manual
Table of Contents
Contents
Page
I. Introduction.................................................................................. 3
Model Numbering........................................................................ 3
Description of Unit....................................................................... 3
II.
III.
IV.
V.
Installation................................................................................... 4
Electrical Wiring........................................................................... 4
Wiring Diagrams.......................................................................... 5
Mounting Instructions.................................................................. 8
Electrode Installation................................................................... 8
A. Cooling Tower........................................................................ 8
B. Boiler.................................................................................... 10
Front Panel
Drawing..................................................................................... 12
Description................................................................................. 12
System Operation Overview...................................................... 13
Start-Up..................................................................................... 13
Calibration................................................................................. 13
Menu Navigation....................................................................... 14
VI. Maintenance.............................................................................. 27
Electrode Cleaning Procedures................................................. 27
VII. Troubleshooting......................................................................... 28
VIII.
Warranty & 30 Day Billing Memo Policy.................................... 29
2
I.Introduction
The MegaTron microprocessor based controllers are designed to provide a wide range of control functions for
recirculating water treatment systems. The controller is programmed through a front panel keypad and can
be configured to provide a customized control system for your application. Your particular unit’s functions can
be determined by comparing the units model number to the Model Numbering table listed below.
Model Numbering
MegaTron units have several base system control functions and unit optional features. Your unit may be
supplied with one or more of the features described in this manual. To determine what features apply to your
unit check the model number label located on the controller enclosure.
Base System Control Functions
C - Tower Conductivity Control
B1- Boiler RTD Conductivity Control
B2- Boiler No Temp Conductivity
P - pH Control
Q - Dual pH Control
R - ORP Control
T - Temperature Control
F1 to F5- Chemical Feed Timers
E - Flow Switch
Whole Unit Optional Features
A - Conduit Connections (115 VAC)
A3 - Liquid tights only for (220-240 VAC)
D - Dry Contact Relays
H - Remote Communications bus only
H1- Internet Connect Communications
H4- Internet Phone Modem Communications
H5- Internet with Cell Modem Router
K - Additional Control Relays
N8 - 4-20mA inputs
O6 - 4-20mA outputs
S - Saturation Index (must have pH)
W - Auxiliary Flow Meter Inputs
Y - ETL Agency Listing / Approvals
Model numbers start MG followed by the Base System Control functions. If multisystem, all of the control
functions of system one are followed by a dash then the functions for the next system. If the next system(s) is
the same as the one before a (-X2, X3 or X4) is used. Another dash separates the whole unit options listed
after all base system control functions. Example: MGCPF3E-X2-DHY.
Notice: Your unit may not have all features and functions described in this manual. This list represents our
most popular options, additional option codes are available. Consult representative for more details.
Description of Unit
MegaTron controllers may be configured to control one to four separate systems including cooling tower
and boiler applications and may have various features depending on the model number. Whether the unit is
controlling 1 to 4 systems each individual system can be configured with a variety of the functions / features
and there may be feature differences between the systems on a unit with multiple systems. (See model
numbering table above).
Control Functions
Each of these control functions are based on an analog input from a probe and will include user settable relay
control settings along with a High and Low Alarm setting and Limit Timer. Each control function will include
a control relay output. When the reading reaches the Set Point the control relay is activated until the reading
changes by the Differential amount.
3
1.
2.
3.
4.
System Conductivity - The conductivity function of the controller is designed to monitor and control
Total Dissolved Solids (TDS) in a recirculating system like a cooling tower or boiler in terms of
electrical conductivity measured in MicroSiemens/cm. This control function is also referred to as
Bleed.
Make-up or Miscellaneous Conductivity -This conductivity with the probe installed in the fresh
make-up water line can be used to control the conductivity of the tower in terms of cycles of
concentration by calculating the difference between the make-up water’s conductivity and the
system’s conductivity. It can also be used to monitor another conductivity with no feed timers
associated with it..
pH - The pH function monitors and controls pH on a scale of 0-14 pH units.
ORP - The ORP function monitors and controls ORP on a scale of +/- 1000 mV.
Chemical Feed Timers
Chemical feed timers are designed to automate the addition of various chemicals by activating a relay output.
Multiple timers can be supplied depending upon the model number and each timer will include a relay output.
All timers can be programmed to be one of the following types.
1.
2.
3.
4.
5.
Pulse Time - Accepts pulses from a make-up water meter (supplied separately). It can accumulate
1-9999 gallons before activating the timer to run.
Feed with Bleed - Activates the relay output simultaneously with the bleed and limits the amount
of time the relay output will be on during the bleed cycle.
Feed after Bleed - Activates the relay output based on a user defined percentage of time based
on the bleed off, another timer or digital input. The relay is activated after a bleed cycle and runs
for the set percentage of that bleed cycle.
Percentage - The relay is on for a percentage of a continuously repeating cycle time that can be
set from 1 minute to 99 hours and 59 minutes.
28 Day - The timer is based on a 28 day cycle with four independent programmable feed cycles
with prebleed and bleed lockout settings.
II.Installation
Electrical Wiring
The MegaTron controller has an internal regulated fused power supply that will operate off of 90 to 250 VAC
at 47 to 63 Hz on the incoming wiring. Each output relay is individually protected with a replaceable fuse.
Relay outputs will equal incoming line voltage.
WARNINGS:
1. The controller should be connected to its own isolated circuit breaker, and for best results, the ground should be a true earth ground, not shared. Wiring must be done according to all applicable local codes.
2. Power (line voltage) must be disconnected while making any connections. If power is supplied to the unit, line voltage will be present on the relay cards located in the lower section of the enclosure, even with the power (ON/OFF) switch off.
3. Low voltage signal wires (probes, flow switch, water meter, etc.) should never be run in conduit with high voltage (like 115VAC) wires.
4. Units should be ordered with the appropriate option to provide powered relays designed for the
incoming/outgoing power.
NOTE: Liquid tight fittings and some labeled signal leads are provided for all signal (low voltage) connections for both pre-wired and conduit units.
4
Pre-Wired
Pre-wired units are supplied with a 16 AWG cable(s) with 3-wire grounded USA 115 volt plug for incoming
power and 3-wire grounded receptacle cords for all control relay outputs also 16 AWG.
NOTE: An additional male power cord is supplied with each group of 5 relays. All incoming power
cords must be plugged in for the unit to work correctly.
Conduit
Conduit units are predrilled at the factory and supplied with conduit knockouts for easy hard wiring to supplied
detachable connectors on the relay card(s) located in the lower section of the controller. Remove the six
screws of the lower panel for access.
NOTES:
1.
2.
3.
4.
5.
6.
Do not drill holes in upper section of enclosure.
Relay 1, 6, 11 or 16 (if supplied) only provide a normally open (N.O.) relay output on relay cards marked Rev B. Revision C of the the relay card has both a (N.O. and N.C.) If a N.O. and N.C. are required on a Rev. B card, use one of the other relays and program that relay to be controlled by the desired control function. See page 24.
The control function that activates each relay output is pre-configured at the factory
based on the options selected. To change relay activation see on page 24.
See page 30 for common bleed / blowdown valve wiring.
Refer to label inside lower panel cover for specific relay board configuration supplied.
Relays
6-20
only on
Relays configured
as “dry
contact”
should only have D.C. voltage ran through them.
*
multi-system controllers
Relay Card Wiring
NET
2
Ribbon Cable 10
1
9
Relay Card Rev. D
GRD
Dry contact
115volt relay
See note below
N.O.
N.C.
FUSE
NET
NET
GRD
GRD
N.O.
N.O.
N.C.
N.C.
FUSE
FUSE
NET
NET
GRD
GRD
N.O.
N.O.
N.C.
N.C.
FUSE
Powered relay
Dry contact
* Relays 6-20 only on multi-system controllers
FUSE
H N G
Jumpers above relay can change it
to a dry contact relay. Use GRD and
POWER INPUT N.O. for a N.O. dry contact relay.
If a whole card is configured for dry contact relays output each relay will be like the top one as shown on the
Rev. C card.
5
System Card Wiring
To wire directly to the system cards the following diagram indicates all connections for the two styles of system
cards. This requires removal of display panel and power must be off.
White
Black
Red
Green
White
Black
Red
Orange
Green
Blue
6 conductors plus a
shield must be ran
from the controller
to the probe. Connect
the 4 wires for the
temperature at the
terminal block
supplied with
the sensor
as shown.
Mother Board Connections
Aux. 1
Aux. 7
Aux. 6
Aux. 5
Aux. 4
Aux. 10
Aux. 9
Aux. 8
Aux. 7
Signal
Ground
+5 VDC
Signal
Ground
+5 VDC
Signal
Ground
+5 VDC
Signal
Sys 1
MegaTron Mother Board
Card Slots
Program / Memory
Card Connection
Aux.
Meter
Inputs
+5 VDC
Signal
Ground
+5 VDC
Signal
Ground
+5 VDC
Signal
Ground
+5 VDC
Processor
Key Pad Ribbon
Cable Connection
-12
+12
Aux. 2
Ground
+5 VDC
Signal
Ground
+5 VDC
Signal
Ground
+5 VDC
Signal
Ground
+5
+5
Aux. 4
Aux. 3
Comm,
The communications card is always the first slot and system 1 card the second. The 4-20mA output card will
be the slot after the last active system card and the 4-20mA input card 2 after the last system card.
Incoming
Power
Key Pad Ribbon
Cable Connection
Display Ribbon
Cable Connection
+12 VDC
for paddlewheel
flowmeters
6
Relay Card Outputs
16-20 11-15 6-10
1-5
4-20mA Output Card Wiring
A.
Isolated Configuration
For isolated 4-20mA outputs an external power source for the loop must be supplied. JP1 and JP2 on the
board must not be jumpered when an external power source is being supplied. The external power source
must not exceed 24 volts DC and will connect onto the card on connector J1 on the postion marked Loop
Supply.
B.
Non-isolated Configuration
For non-isolated 4-20mA outputs the controller will supply the power for the loop. JP1 and JP2 must be
jumpered and no connections are made to the Loop Supply points.
Note: If multiple outputs are being connected to a single energy management system the negatives or commons
MUST remain isolated from each other. Does not apply to Rev. D or later.
4-20mA Input Card Wiring
The 4-20mA input card requires that the external device sending the 4-20mA input signal(s) supply the power
for the loop. The external power source must not exceed 24 volts DC.
7
Mounting Instructions
Select a mounting location that provides the operator easy access to the unit and a clear view of the
controls through the cover of the controller. The location should be convenient to grounded electrical
connections, the needed sample line plumbing and is on a stable vertical surface.
WARNING: Avoid locations that expose the controller to direct sunlight, vapors, vibration,
liquid spills or extreme temperatures; less than 0°F (-17.8°C) or greater than 120°F (50°C). EMI
(electromagnetic interference) from radio transmissions and electric motors can also cause damage
or interference and should be avoided.
Electrode Installation
MegaTron controllers may come configured for various circulating water systems. Listed below are
instructions for cooling tower and boiler typical installations. Your specific installation requirements may
differ but should conform to these instructions as much as possible for proper operation.
A. Cooling Tower
The standard probe(s) and/or flow assembly for cooling tower installations is constructed of schedule
80 PVC and supplied with 3/4” slip fittings for installing into a sample line. To insure proper operation
the sample line must have a flow rate of 3-10 gpm. Inlet pressure must be higher than outlet pressure in
order for water to flow past the electrode(s) to achieve the required rate. The probes are temperature
compensated for increased accuracy.
NOTES:
1. 2. 3. 4.
5.
Install an isolation valve on either side of the flow assembly so electrodes can be easily isolated for removal and cleaning.
A line strainer is recommended upstream from the probes to protect against fouling and damage.
Mount pH or ORP electrodes vertically.
Green solution reference wire must be connected to either pH or ORP sensor. If both
pH & ORP are present on system card, only one solution reference connection is
needed.
Systems with a flow switch require 2-3 gpm flow rate to operate outputs.
WARNINGS: 1. Electrodes are O-ring sealed, which if damaged will cause a leak.
2. Do not allow pH sensor tips to dry out, damage will occur.
3. Do not exceed a water temperature range of 32°F to 140°F.
4. Do not exceed a maximum pressure of 150 psi.
8
Typical Cooling Tower Installation Diagram
BLEED VALVE
TO DRAIN
Cooling Tower Probe Assembly
FS-FC
TFS-C
FS-0C
1A9A000262
TFS-OC
E-30-PH
OR
pH Probe
PE-21
-orOE-21
FS-T
ORP Probe
PE-NUT
E-30-PH
FS-B1-SP
FS-PT-P
2C0A-150
Paddle Flow Switch
used with option
E3
FS-SP
Sample Valve
Standard Tower Probes
UNION-3/4TT
Conductivity....................E-4A
pH...................................PE-2
ORP............................... OE-2
9
B. Boiler
Standard boiler electrodes have a MNPT stainless steel bushing and are supplied with a FNPT cross
designed for mounting in the skimmer (surface) blowdown line. Sampling of the boiler’s water can be
achieved using one of two typical plumbing configurations (continuous sampling or timed and/or hold
sampling). For a successful installation, it is critical to observe the recommended distances and pipe sizes
provided in the installation drawings. The probes are temperature compensated for increased accuracy.
For best results, the electrode cross should be mounted in a 1”skimmer blowdown line within 4’ of
the boiler. Smaller line sizes and greater distances may affect the response time and accuracy of the
electrode. A flow-throttling device down stream from the probe (within 24 inches) is required to ensure that
the electrode is exposed to water and not steam. Properly installed and adjusted, this device will prevent
flashing in the electrode chamber.
NOTES:
1. 2. 3. Install a fully ported type valve between the electrode and the boiler. This allows the electrode to be isolated for removal and cleaning.
A flushing line and 1/4 turn type ball valve should be installed in the bottom of the cross to periodically “flush” sediment from the electrode chamber.
Make sure the alignment arrows on the probe end up parallel to the flow for best performance.
WARNINGS: 1. The probe must be fully immersed in the system water to read correctly. Steam flashing will result in incorrect readings.
2. Do not exceed a maximum water temperature of 400°F (204°C)
3. Do not exceed a maximum pressure of 300 psi (20.6 bar)
4. A throttling device must be installed down stream from the elecrode.
Boiler Conductivity Electrodes
BE-4RTD and BE-32
Wiring Note: BE-4RTD probes require a 6 conductor cable from controller to probe, BE-32 probes only
require a 2 conductor cable.
10
Boiler Conductivity Electrodes
1
6
2
7
3
8
4
Throttling device
9
SET UP
5
0
HOME
RUN
CANCEL
HELP
Fully ported
gate or ball valve
BACK
1" Continuous
blow down line
Advantage
Controls, Inc.
Electrode within a 1"
cross with electrical
connection vented
1/2" pipe
between probe
and throttle
device and
flush valve
Electrically
actuated
blow down
valve
Warning - Do not use on bottom blowdown lines, only continuous or surface blowdown lines.
!
Typical Timed Sampling and Sample and Hold Boiler Installation
1
6
2
7
3
8
4
5
Throttling device
approximately 18"
past probe
9
SET UP
HOME
RUN
CANCEL
HELP
Electrode within a 1"
cross with electrical
connection vented
0
BACK
1" Continuous
blow down line
Advantage
Controls, Inc.
Fully ported
gate or ball
valve
Electrically actuated
blow down valve
To drain
!
1/2" pipe between
probe and throttle
device and to the
flush valve
Warning - Do not use on bottom blowdown lines, only continuous or surface blowdown lines.
11
III. Front Panel Description
1
2
3
6
<HOME SETUP>
SET POINTS
DATE/TIME
CALIBRATION
CONFIGURE
TIMERS
HISTORY
CUSTOMIZE
WATER METER
ALARMS
RELAYS
4
7
8
9
0
5
SET UP
RUN
ENTER
HOME
CANCEL
HELP
BACK
NUMBER Keys- Used to enter new values in the SET UP mode and to access desired sub menus.
UP/DOWN - Used to cycle through text options to find desired setting.
LEFT/RIGHT -
Used to cycle through text or setting options to find desired setting.
SET UP/RUN - System initializes into RUN mode. Press this key to put the controller in SET UP
Mode and see HOME menu page.
ENTER - Used to log a changed value into program.
HOME - Used to go back to the HOME menu page.
CANCEL -
Used to cancel a pop-up screen if no change is desired.
HELP -
Used to access help screens.
BACK -
Used to go back to last menu screen viewed or clear values keyed in that are not
wanted.
12
IV. System Operation Overview
Operation
MegaTron controllers have two modes of operation, RUN and SET-UP.
RUN - This mode is for normal operation. In the RUN mode the display will show each system’s parameters.
If an alarm is present the ALARM box will flash how many alarms are present. No settings may be entered or
changed in the RUN mode. Readings are updated every 6 seconds on the screen while in the RUN mode.
SET-UP - This mode is used to make adjustments to settings and readings on the controller. To access the
SET UP mode from the RUN screen, press the SETUP/RUN key.
Typical Start Up Instruction
Complete all installation steps before beginning this procedure. Ensure that all controlled devices (pumps,
solenoid valves, etc.) are operational and connected to the controller. Open the isolation valves to allow water
to pass through the sample stream assembly. Before beginning the start up procedure, familiarize yourself
with the programming and operation of the system by reviewing the menus available. Use the keys of the
controller to skim through all your options.
A.Calibration
All MegaTron controllers are factory calibrated for temperature, conductivity, pH and ORP. All units are
shipped with the date preset, and the clock set to your current time. These readings and settings should be
verified for accuracy, and adjusted as per the instructions listed below.
1. Conductivity - To calibrate the conductivity reading, remove the electrode from the line and wipe the
flat surface with a clean cloth. Re-install the electrode and open the isolation valves to allow a sample
across the probe. Be sure to allow the reading to stabilize for one minute. Select “SYSTEM COND” from
the “CALIBRATION” menu. Then key in the corrected conductivity value. Press ENTER to log in that
reading.
2. pH - Under normal operating conditions, pH calibration is achieved using the following steps. From
the “CALIBRATION” menu, select “SYSTEM PH.” Enter the correct pH value. Press ENTER to log in the
new reading.
3. ORP - To calibrate ORP, from the CALIBRATION menu select “SYSTEM ORP”. Compare the displayed
reading to the actual system ORP. If these readings do not match, key in the correct ORP value, and
push ENTER.
There are limits to how much the calibration can be adjusted. The instrument will only accept new conductivity
values which are from 1/3 to 8x the present reading. Any entry outside this range will cause a default to the
original reading. If this happens, call 1-800-743-7431 for technical assistance.
13
V. Menu Navigation
To access the menus press the Set Up / Run key on the front panel. This takes you to the Home menu.
MegaTron controller’s menus are easily navigated by pressing the associated number key next to a menu
box on the screen. Once you have stepped through the sub menus to reach a point at which a value or
selection is made a Pop-up window will appear prompting you to enter a desired value or selection.
NOTE: When entering new numeric values, enter all available digits (characters).
1. Home Menu
>HOME SETUP<
SETPOINTSDATE/TIME
CALIBRATIONCONFIGURE
TIMERSHISTORY
CUSTOMIZE
WATER METER
ALARMSRELAYS
SET POINTS -
CALIBRATION -
TIMERS -
CUSTOMIZE -
ALARMS - DAY/TIME - CONFIGURE -
HISTORY - WATER METER -
RELAYS -
From the HOME menu select the desired menu.
The menu name explains what parameters can be
programmed in the menu.
Setting control set points for conductivity, temperature, pH and ORP.
Calibrating conductivity, temperature, pH and ORP if present.
Menu for selecting type and settings for all present feed timers.
Giving the controller, each system and all relays a user defined name.
View current alarms.
Menu for setting date and time.
Menus for configuring passwords, relay activations, setting history interval, flow switch, contrast, temperature scale.
Allows for view history on board in a graph form.
Menu for configuring water meter totalizing.
Menu for resetting accumulated “ON” times and manual activation.
2. Set Points
The same basic format is used for defining each available analog probe input’s control parameters. Boiler
conductivity systems will also have an additional menu step for programming the sampling method desired
from continuous, timed or sample and hold.
>SYSTEM 1 SET POINTS<
SYSTEM
SYSTEM
SYSTEM
SYSTEM
COND
TEMP
pH
ORP
mA OUT
mA IN
AUX INPUTS
SET POINTS - For setting the relay set points for the
available analog probe readings such as conductivity,
pH, ORP or temperature.
If there is more than one System present you first
select which system’s values are to be adjusted. After
the system and function is selected a review page is
provided to show current settings. Select SETTINGS to access each set point menu option.
NOTE: In the Setpoint pop-up screen the direction (Rising or Falling) of the setpoint can also be set. Rising
setpoints will activate the control relay when the particular probe reading rises above the setpoint and will
stay activated until the reading comes down by the amount of the differential. If set for Falling the relay is
activated when the probe reading falls below the setpoint and stays on until the probe reading comes back
up by the amount of the differential.
14
2.1 Set Point Options
>SYSTEM 1 COND SETPOINT<
SET POINT
DIFFERENTIAL
HIGH ALARM
LOW ALARM
LIMIT TIME
SET POINT - What reading turns the relay on
DIFFERENTIAL - Amount reading changes by before
the relay is turned off
HIGH ALARM - What reading generates a High alarm
notification.
LOW ALARM - What reading generates a Low alarm
notification.
LIMIT TIMER - What amount of continuous bleeding
will generate a time alarm notice. The bleed is not
locked-out by this alarm (pH, ORP and mA in functions
are).
Note: Each alarm value can also be set-up to be displayed or not on the front screen as will as remotely
notified or not if connected to the Web Advantage server.
2.2 Make-up or Miscellaneous Conductivity
Tower systems with this option have an additional menu on the review page labeled SAMPLE METHOD. The
sample method pop-up screen allows the user to select continuous or cycles control. With cycles selected
under Settings a best and worst cycles value is attached to a best and worst make-up conductivity value. The
controller will control the cycles proportionally between the two cycles values as the make up conductivity
changes between the two identified values.
>SYSTEM 1 COND SETPOINT<
DIFFERENTIAL
HIGH ALARM
LOW ALARM
LIMIT TIME
BEST MAKEUP
BEST CYCLES
WORST MAKEUP
WORST CYCLES
SYSTEM MAX
BEST MAKEUP - Conductivity of best expected
makeup water.
BEST CYCLES - Cycles desired with best water.
WORST MAKEUP - Worst expected water.
WORST CYCLES - Cycles with worst water.
SYSTEM MAX - A fixed conductivity set point that
overides the cycles setpoint if reached.
Note: If continuous is selected the standard settings are used for system conductivity and the
miscellaneous conductivity (labeled M COND) is the set points menus.
2.3 pH and ORP
The pH and ORP set point settings follow the same format as shown above in section 2.1.
>SYSTEM 1 pH SETPOINT<
SET POINTINTERRUPT
DIFFERENTIAL
SET POINT 2
HIGH ALARM
LOW ALARM
LIMIT TIME
INTERRUPT - Only applies to pH settings and
allows the Interruption of pH control during bleed,
other chemical feed or both.
SET POINT 2 - Is only present on systems with
Dual pH control option. It is a second set point for
applications when an acid and caustic are required.
Set Point 1 will be for feeding acid and Set Point 2 for
feeding caustic.
Note: When the Limit Time value is met it will force off the control relay being driven by pH or ORP.
To reset the limit timer and get the control relay active again enter a new Limit Timer value.
15
2.4 Boiler Conductivity
Conductivity on boiler systems can be configured for Timed Sampling, Sample and Hold or Continuous for
the conductivity sampling method.
Timed sampling incorporates a sample timer which allows the boiler to be sampled at periodic intervals.
Sample intervals are adjustable from 1 minute to 99 hours, 59 min. Sample duration (on-time) is adjustable
from 1 second to 99 minutes, 59 seconds.
Sample and hold uses a sample timer for periodic sampling intervals. The unit will sample for its duration
then hold the blowdown valve closed for a settable period (hold time). The conductivity is checked at the end
of the hold period, if additional blowdown is required the blowdown valve is held open for a preset amount of
time (blowdown time). Then sample cycle is repeated.
Continuous sample has a sample of boiler or condensate water go past the probe continuously. If the
reading is above the set point, blowdown will continue until the set point has been satisfied.
>SYSTEM 1 COND SETPOINT<
SET POINT
DIFFERENTIAL
HIGH ALARM
LOW ALARM
2.5 SAMPLE INT
SAMPLE DUR
HOLD TIME
BLOWDOWN
SET POINT - What reading turns the relay on
DIFFERENTIAL - Amount reading changes by before
the relay is turned off
HIGH ALARM - What reading generates a High alarm
notification.
LOW ALARM - What reading generates a Low alarm
notification.
SAMPLE INT - Period between samples.
SAMPLE DUR - How long a sample lasts.
HOLD TIME - How long a hold lasts.
BLOWDOWN - How long to blowdown if reading is
above the set point after the hold. Hold repeated after
BLOWDOWN time.
Aux Inputs
Auxiliary inputs are the digital inputs for optional Flow Switch and other digital inputs such as low drum level
alarms. From these menus the user can set if they want each of the alarms Displayed, Remote Notification,
both or none.
>SYSTEM 1 DIGITAL INPUTS ALARM<
ALARM NOTIFICATION
FLOW SW = DISPLAY
DIGITAL 1 = DISPLAY
FLOW ALARM
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
1
2
3
4
5
16
2.6 4-20mA Out
Units with a 4-20mA output option will have a menu for setting up the 4-20mA output. The 4mA and 20mA
values can be defined by giving the output proportioning capability. i.e. 4mA = a pH of 6.0 and 20mA = a pH
of 8.0.
>OUT 1 SETUP<
SIGNAL SOURCE
4mA VALUE
20mA VALUE
2.7 4-20mA Input
>mA INPUT 1 SETPOINT<
SET POINT
DIFFERENTIAL
HIGH ALARM
LOW ALARM
3. SIGNAL SOURCE - Select which probe reading the
mA will use as its reading source.
4 mA VALUE - What the 4mA signal equals
20mA VALUE - What the 20mA signal equals on the
assigned signal sources scale.
SET POINT - What reading turns the relay on
DIFFERENTIAL - Amount reading changes by before
the relay is turned off
HIGH ALARM - What reading generates a High alarm
notification.
LOW ALARM - What reading generates a Low alarm
notification.
Calibration
Calibration is for adjusting the displayed value of a probes reading to match your tester or known solution.
Pick the system or mA input first. From a particular system pick the probe to calibrate.
>SYSTEM 1 CALIBRATION<
SYSTEM
SYSTEM
SYSTEM
SYSTEM
3.1 COND
TEMP
pH
ORP
CALIBRATION - For adjusting the actual reading
values of the available analog probe inputs, such as
conductivity, pH, ORP or temperature.
Conductivity Calibration
>SYSTEM 1 COND CALIBRATION<
CALIBRATE
RESET ZERO
Cal Factor 1.10
CALIBRATE - With a clean probe on-line seeing the
system’s water enter the known (tested from a calibrated
hand held tester) value.
RESET ZERO - With the probe out of solution and dry
enter a new zero point. Note: Probe must be dry!
NOTE: In the calibration pop-up window the raw analog to digital (A/D) value will be displayed. A new
calibration value should only be entered when the probe is sensing a stable A/D value. If the system is a
boiler the associated relay can be forced on in the pop-up to allow for a fresh hot sample. Boiler probes
should have fresh hot water blown past them for a minimum of 2 minutes before calibrating.The A/D reading
has a range of 0 to 32,767. If it is at one end of the range or the other when trying to calibrate
something is wrong with the probe or wire run.
17
3.2 pH and ORP Calibration
>SYSTEM 1 pH CALIBRATION<
1 POINT CAL
2 POINT CAL
Notes: 1.
2.
3.3 1 POINT - With a clean probe on-line seeing the system’s
water enter the known (tested from a calibrated hand
held tester) value.
2 POINT - Enter a known Low value with a clean probe
in a buffer solution. Then enter a known High value with
the clean probe in a buffer.
Probes must be rinsed between buffers when doing a 2 Point calibration and given at least 30 seconds in solution to adjust to the buffer. There must be at least 2 full pH points between buffer solutions. Using a buffer of 4 and 10 is the best procedure. ORP buffers should be at least 200 points apart.
4-20mA Output Calibration
>CURRENT LOOP CALIBRATION<
4-20mA outputs can be calibrated to insure that the
output generated by the controller and received by the
external device match. With a volt meter connected
across the out and return wires (see page 7) of the
4-20mA output channel to be calibrated go into the
output’s Low or High calibration.
>mA OUTPUT 1 CALIBRATION<
The number displayed in the Calibration dialog box
can range from 0-4095 with 800 equal to 0 mA output
and 4030 equal to 20 mA. This number range of
0-4095 is the raw digital to analog (D/A) values and is
strictly used for a reference. The D / A numbers you
get will vary based on your installation conditions.
>mA OUTPUT 1 CALIBRATION<
While in the High or Low calibration pop-up screen use
the up and down arrows to change the output value
being read with the volt meter. Adjust the High value
for the 20 mA reading and the Low value for the 4 mA
value.
OUTPUT 1
OUTPUT 2
HIGH 4030
LOW 800
OUTPUT 1 CAL HIGH
4000
Use Up/Down arrows to change
Use Enter to save value
18
3.4 4-20mA Input Calibration
4-20mA inputs can be calibrated to insure that the input seen by the controller from the external device
match. It also allows for setting the 4-20mA input into a number range that relates to the value being read.
>CURRENT LOOP CALIBRATION<
INPUT 1
INPUT 2
Select the Input to be calibrated
>mA INPUT 1 CALIBRATION<
>mA INPUT 1 20mA CAL<
20mA
3750
4mA
750
MAX
200
LOW0
OFFSETDISABLED
INPUT 1 CAL HIGH
3750 A/D
PUT 20mA ON INPUT THEN
PRESS ENTER
The 20mA and 4mA values are where the controller’s raw analog to digital value is adjusted to match a
20mA (full scale) and 4mA (bottom of scale) signal from the external device inputting the 4-20mA input. The
external device must be connected to the controller and showing either full scale or bottom of scale when
calibrating each. The number shown along with either the 20mA or 4mA while calibrating is the raw A/D value
and is only a reference. A 20mA input should be around 3750 and 4mA around 750. If the A/D numbers are
not in this range check input device.
The MAX and LOW calibration inputs are for telling the controller what to display for a 20mA input and a 4mA
input. For example if the input is a drum level sensor monitoring a 55 gallon drum the value for MAX should
be 55 and LOW should be 0. The controller then displays a number automatically ranging between 55 and
0 based on the input value. The units of measure (gallons for example) is set in the Customize menu from
the Home page.
OFFSET - Offsets current displayed value of the 4-20mA input reading to allow for a manual 1pt calibration.
4. Timers
A unit may have up to 5 selectable timers for each system on a controller. All timers are associated with their
system, so for a % of post bleed timer looks at the bleed of that system.
TIMER
TIMER
TIMER
TIMER
TIMER
>SYSTEM 1 TIMERS<
1
2
3
4
5
TIMERS - Select the type (28-day, pulse, limit, percent
or percent of post blowdown) as well as the run times of
each timer available per system.
19
4.1 Timer Type Selection
A pop-up screen lets you scroll through the various timer types available.
>SYSTEM 1 TIMER 1 SET UP<
>SET TIMER TYPE (PULSE)<
-> PULSE
USE UP/DOWN KEYS TO CHANGE
PRESS ENTER TO ACCEPT
SET UP
4.2 TIMER TYPE
Timer Set Up
>SYSTEM 1 TIMER 1 SET UP<
TIMER TYPE: PULSE
GALLONS: 10
RUN TIME
(MM:SS):01:00
INPUT:
WATER METER 1
SET UP
4.3 Each timer type selected will have its own unique Set Up
sub menu with additional selections specific to the type
of timer selected. The page displayed before entering
the Set Up menu of a timer provides an overall review
of the timers current settings.
TIMER TYPE
Pulse Timer
>SYSTEM 1 TIMER 1 CHANGE<
ACCUMULATE
RUN TIME
METER INPUT
4.4 Pulse - A water meter activated timer
Limit - Feed with bleed with a maximum run time or limit
for one bleed cycle.
Percent - A continuous cycle timer that sets a percentage
On time of a cycle.
Percent Post Bleed - For feed after bleed for a settable
percentage of the bleed time with a maximum run time.
28-Day - A biocide or event timer.
BLEED INTR
ACCUMULATE - The number of gallons or liters from
water meter to count before activating timer.
RUN TIME - The amount of time for the timer to run
METER INPUT - Select water meter 1 or 2 for the
timer’s activation. Water meter 1 + 2 can be selected
only if the meters have the same contact value.
BLEED INTR - Allows the pulse timer to be interrupted
during conductivity bleed. While interrupted, you can
also define the maximum number of timer run cycles
(1-9) to store for playback.
Percent Timer
>SYSTEM 1 TIMER 1 CHANGE<
% OF CYCLE
CYCLE TIME
% of CYCLE - The percent of the defined cycle time
that the timer is to be on.
CYCLE TIME - The amount of time in MM:SS that the
cycle is going to be on.
20
4.5 Post Bleed Timer
>SYSTEM 1 TIMER 1 CHANGE<
% OF BLEED
LIMIT TIME
SOURCE
4.6 With Bleed Timer
>SYSTEM 1 TIMER 1 CHANGE<
LIMIT TIME
4.7 % of BLEED - The % of the post bleed time or other
source time that you want the timer to run.
LIMIT TIMER - The limit timer is a safety feature that
limits a single feed cycle to the amount of time set
regardless of the calculated post feed %.
SOURCE - Select between cond. bleed, another timer
or digital input as the time souce.
LIMIT TIMER - This timer starts when the conductivity
bleed starts and turns off when the bleed stops or until
the limit time has been reached. The time can be set
in MM:SS.
28-Day Timer
Each 28-day timer has Program 1-4 for programming the various feed times. While the programming steps
for four programs are the same each can have it’s own independent settings.
>SYSTEM 1 TIMER 1 CHANGE<
WEEKS
DAYS
START TIME
RUN TIME
PREBLEED
MIN
FEED
BLEED
FLOW
ORP
COND
LOCK
LOCK
LOCK
LOCK
Note: ORP lock is only for systems with the
ORP function. If interlocked the ORP set
point will control the 28-day timer’s relay On
and OFF during the timer’s programmed
RUN time. The ORP will need to have a
00:00 setting for it’s limit timer.
WEEKS - The week(s) that the timer is to feed.
DAYS - The day(s) that the timer is to feed.
START - The time of day for the timer to start.
RUN - How long the timer is to run.
PREBLEED - How long the controller is to bleed down
before feeding in chemical. NOTE: The prebleed starts
at the START time programmed above.
MIN COND - The minimum conductivity that the unit
will prebleed down to.
FEED LOCK - Which other system timer to lockout
during this timer’s run time.
BLEED LOCK - How long to lock out the bleed function
after the timer’s run time starts.
FLOW LOCK - If the system has a flow switch you can
ignore it for this timer.
.
21
5. Customize
This menu allows the user to define the on-screen name of the unit plus the name of each system and relay.
The user can also setup the Notepad for each system and 4-20mA Input’s name and unit of measurement.
>CUSTOMIZE<
UNIT NAMES
RELAY NAMESNOTEPAD
SYSTEM 1 NAME
pH INDEX
mA IN
RUN SCREEN
RUN SCREEN - Allows the user to select what will be
shown on the screen while the controller is in the RUN
mode. Like diplaying temperature readings or water
meter totals for a particular system.
NOTE: When entering values for custom names use the numerical keys for numbers and the up / down
arrows to scroll through all the characters of a key board. Press the right arrow to advance the curser after
setting a desired value. Press the Help button to place the last entered character into the new cursor space
to speed up the process. The Help button will also jump advance through the characters.
5.1 Notepad
The Notepad function allows the user to set up a customized manually entered data field for each system with
ten notepad items. The NOTEPAD is ideal for setting up and storing into the controller’s history the items
typically tested for reporting a service call. The Notepad items come with no names but when an individual
note is selected a menu for setting it appears.
Also can be used as a Reminder Timer with or without flow.
>NOTEPAD SYS 1 NOTE 1<
NAME
NUMBER
UNITS
ALARMS
5.2
mA Inputs
>mA INPUT 1 CUSTOMIZE<
NAME
UNITS
NUMBER
5.3 NAME - Pick from a list of defined names or customize
your own.
NUMBER - Set the number range.
UNITS - Set the units of measurement.
ALARMS - Set Hi/Low alarm points and how frequently
a new value is expected to be manually enter via the
History menu.
NAME - Name the input.
UNITS - Set the units of measurement.
NUMBER - Set the number range.
pH Index
If the controller has the pH index option (must have pH control) user can select LSI or RSI indexing. The
controller will automatically set some Notepad entries for manually inputting needed data to perform the
calculation which will be displayed in the RUN screens.
22
6. Alarms
SYS 1 ALARMS
7. >ALARMS<
Date and Time Set Up
>SET DATE AND TIMES<
SET DATE
SET TIME
SET DAY
SET WEEK Friday May 14, 2005 03:04:56 8. ALARMS - Shows any current alarms.
DATE AND TIME - For setting the date, time, day and
week on the controller.
Configure
Provides access to menus to set-up passwords, relay activation, temp scale, display contrast, flow switch,
inputs, history time stamps, factory set-up and system information.
CONTRAST - This screen allows for adjusting the
display contrast.
PASSWORD
CONTRAST FLOW SW - Defines a flow switch to be open or closed
RELAYS
TEMP SCALE with flow.
NETWORK FACTORY - A factory only menu
HISTORY SYS INFO TEMP SCALE - Set Celsius or Fahrenheit
FLOW SW
FACTORY HISTORY - Sets the history time stamp interval.
SYS INFO - Tells unit software specifics.
>CONFIGURE<
8.1 Password
>CONFIGURE PASSWORDS<
ADMIN PASSWORD
USER PASSWORD
USER SET UP ADMIN PASSWORD - The administrator password
gives access to all menus except factory set up.
USER PASSWORD - The user password allows the
user to access HOME menus that are made available
in USER SET UP.
23
8.2 Relays
>RELAY 1 SETUP<
MAIN ACTION
ACTIVATOR 2
ACTIVATOR 3 ACTIVATOR 4 CONFIGURE RELAYS - This menu lets you choose a
Main Action or function (timer 1, conductivity, alarms
etc...) to activates a relay.
DISABLE 1
DISABLE 2
DISABLE 3 A pop-up screen appears with a list of all available
DISABLE 4 activation functions to arrow through.
DAILY MAX
Additional relay logic is available with up to 3 additional Activators and up to 4 Disablers allowing multiple
functions to activate the same relay and multiple functions to prevent the relay from coming on. There is
also a Daily Max amount of time that a relay can be on. If a relay is on for the max amount it does not let
the relay come on anymore that day. (A 24 hour clock is used for the day with midnight being the start of
the day).
8.3 History
This menu is used to set the history “time stamp” interval, the water meter daily history starting hour and the
alarm delay period.
>CONFIGURE HISTORY<
INTERVAL
W/M HOUR
ALARM DELAY INTERVAL - The amount of time between each history
time stamp for probe readings.
W/M HOUR - The time of day that the daily water
meter history cycle is to start.
ALARM DELAY - The amount of time an alarm has to
be on before it is recognized as an alarm.
8.4 Flow Switch
This menu allows the user to select if a flow switch signal will represent a flowing condition when a “closed”
or “open” signal is seen for each systems flow switch input. User can also select if timers can work always
or only with flow.
8.5 Contrast
This menu is used to adjust the contrast of the display.
8.6 Temperature Scale
This menu is used to select the type of temperature scale to display.
8.7 Network
The Network menu is used when a controller is being remotely communicated with either a local network
connection or over the internet on the Web Advantage server.
>CONFIGURE NETWORK<
IP ADDRESS
HTTP REMOTE
IP MASKFTP
GATEWAY RESET
SERVER HTTP LOCAL NETWORK - This menu is used for setting up the
remote WebAdvantage communications and is
covered in a separate manual.
24
8.8 System Information
System information will identify the version of firmware installed in the controller along with the controller’s
serial number.
9. History
The onboard history allows for viewing the history of the probe readings, relay activations, key-pad activity,
calibrations, water meter hourly and daily logs and alarms for each system present. It is also where Notepad
data is entered and reviewed. An initial overview page is displayed showing your current sample interval, the
calculated number of days the unit can keep probe history for before losing the oldest. The number of sensor
samples and relay/alarm events and Notepad entries currently stored is also displayed.
SYSTEM 1
SYSTEM 2 >HOME REVIEW<
Sample Time: 5 MIN
(Length 164.62 days)
Sensor Samples
882 Relay/Alarm Events
323
Notepad Entries
9.1 NOTE: The history can be reset by going to the
configure menu and entering a different sample
interval. After the new sample interval has been set
the onboard history is reset.
Viewing History
RELAY LOGS - Relay activations displayed in a log
form. Arrow up to advance through the log.
RELAY LOGS
WATER METER ALARM LOG - Alarm activations in log form.
SENSOR HISTORY - For selecting the parameters
ALARM LOGS
and viewing of a given probe reading’s history in log or
SENSOR HISTORY EVENT LOG graph form.
EVENT LOG - Displays various activities.
NOTEPAD >HISTORY<
9.2 Notepad Entries
>NOTEPAD: SYS 1 NOTE 1<
ENTER VALUE
LOG
GRAPH Total Hardness
8 Entries
517.2 Hrs to Alarm
The Notepad section under History is where the user
goes to enter new values for the customized notepad
items. Each individual notepad item’s manually
entered entries are stored in the units history and
can be reviewed in log or graph form after 4 or more
values have been entered.
25
9.3 Water Meter History
The water meter history allows the user to review both water meter one and two of a particular system in both
an hourly format (for the past 24 hours) or a daily format for the past 60 days. If an evaporation calculation
is being kept, a daily history of this value is also available.
10. Water Meters
Each system with a timer on it will have 2 water meter inputs. Each of these can have the incoming contact
defined allowing the controller to keep track of water usage. If desired the controller can calculate evaporation
loss by subtracting the deference between a systems 2 water meter inputs.
>SYS1 WATER METER 1<
TOTAL VALUE:
0280500.0 GALLONS
FLOW RATE:
000.0 GALLONS/MIN
CONTACT VALUE: 0010.0 GAL/CONTACT
CONTACT VALUE CONTACT UNIT
RESET TOTAL
EVAP CALC
11. CONTACT VALUE - Defines the numerical value for a
contact; i.e. 10.
CONTACT UNIT - Defines the units of measurement
for a contact; i.e. Gallons / Contact
RESET TOTAL - Resets the totalizer count. Totalizers
should be reset after 400 million.
EVAP CALC - Defines which way to subtract the 2
water meter inputs for an evaporation value.
Relays
STATUS
RESET
>RELAYS<
STATUS - Allows for viewing accumulated relay ON
times, temporary forcing relays ON or OFF or seeing which relay is on.
RESET - Allows the accumulated run time of a
particular relay to be reset to zero.
>RELAY STATUS<
In the STATUS view the accumulated ON time is
shown along with the main activator, custom name and
current status:
ON = Relay on by relay activators
OFF = Relay off by normal logic
OFF-T = Relay off for daily max
OFF-D = Relay off for relay disabler
ON-A = Relay activated by activator other than main
action
H-ON = Relay manually forced on
H-OFF = Relay manually forced off
R01: ON
006:30:30
SYS1 COND BLEED
R02:OFF
008:56:35
SYS1pH
R03:OFF-T
011:00:10
SYS1 TIMER1 INH
R04:OFF
007:00:00
SYS1 TIMER2 BIO1
R05:OFF
008:10:30
SYS1 TIMER3 BIO2
26
VI. Maintenance
The only required maintenance for normal uninterrupted operation of your MegaTron controller is cleaning
of the electrode(s). After initial start up, it is a good idea to clean the electrode frequently until a schedule
based on need has been developed. Since each application is unique, it is difficult to estimate the required
frequency of cleaning. The first cleaning should take place after about one week of the system being on line.
To determine the required cleaning frequency, record the reading on the controller before the electrode is
removed for cleaning. After cleaning, record the new reading. If a change is observed in the two readings,
the electrode was dirty. The more significant the change, the dirtier the electrode. If no change occurs,
cleaning needs to be done less often.
Conductivity Electrode Cleaning Procedure
1.
2.
3.
4.
5.
Record the current conductivity reading.
Turn off water flow through the electrode loop, bleed pressure from the line and remove electrode.
Use a clean cloth and a mild cleaning solution to remove loose dirt etc., from the flat surface of the electrode.
If the electrode has deposits such as scale attached to the electrode surface a more aggressive cleaning approach will be needed. There are several ways to do this, the preferred method being the one that is easiest for the user.
a.
Use a mild acid solution to dissolve deposits.
b.
Lay a piece of sandpaper (200 grit or finer) on a flat surface such as a bench top. “Sand” electrode to remove stubborn deposits. (Do not wipe surface with your finger.) Oil from your skin will foul carbon tips.
Reinstall the electrode in the system. After the reading stabilizes, calibrate the unit to a reliable test reading.
Many times an electrode can appear to be clean, but the unit still cannot be calibrated. If this is the case, use
one of the more aggressive electrode cleaning procedures listed in step 4 above. Recheck the calibration
after completion of this procedure. If no change was observed in the reading, replace the electrode. If a
change occurred but the unit still will not calibrate, repeat procedure as many times as necessary.
pH and ORP Electrode Cleaning Procedure
1.
2.
3.
4.
Remove the pH electrode from the system.
Spray with water and/or detergent, using a soft brush to dislodge any fouling.
Visually inspect the electrode for signs of damage.
Calibrate the electrode while it is in a known solution.
Slow response or non-reproducible measurements are signs that the electrode has become coated or
clogged. The pH glass is susceptible to mounting by many substances. The speed of response, normally
95% of the reading in less than 10 seconds, is dramatically degraded when the pH glass is coated.
27
To restore the speed of response for a pH electrode, clean the bulb with a high quality detergent, methyl
alcohol or other suitable solvent using a “Q-tip”. Rinse well with distilled water and retest. If the electrode
now responds, but erratically, soak the sensor in 0.1 Molar HCl for 5 minutes. Remove and rinse with water
and place in 0.1 Molar NaOH for 5 minutes. Remove, rinse again and then place the sensor in pH 4. buffer
for 10 minutes before use.
ORP/REDOX electrode may be gently abraded by use of 600 grade wet silicone carbide paper, jewelers
rouge or very fine steel wool. Try one of the previous cleaning methods first before using this method.
VII. Troubleshooting
The Advantage MegaTron controller is designed for many years of trouble free operation. Should a problem
occur, refer to the following chart to help identify the problem. If replacement is required, follow the procedures
listed in the Warranty and Factory Service portion of this manual.
SYMPTOM
POSSIBLE CAUSE
False reading..................................... Bad or dirty electrode
Out of calibration
Will not calibrate................................ Dirty electrode
Faulty electrode
Faulty wiring to electrode
No system power............................... Check power source
Check fuse
Check connections
SOLUTION
Clean, as needed
Calibrate unit
Clean electrode
Replace electrode if needed
Replace wiring if needed
Plug into different receptacle
Replace as needed
Make sure ribbon cables are secure
Pulse timer not activating.................. Check wiring
Check external device
Repair as needed
Repair/replace as needed
Outputs not energized....................... No flow
Check fuse
Check sample line for
clogged pipes or strainers
Replace as needed
28
VIII. Advantage Controls’ Product Warranty
Advantage Controls warrants control systems of its manufacture to be free of defects in material or
workmanship. Liability under this policy extends for 24 months from date of installation. Liability is limited
to repair or replacement of any failed equipment or part proven defective in material or workmanship
upon manufacturer’s examination. Removal and installation costs are not included under this warranty.
Manufacturer’s liability shall never exceed the selling price of equipment or part in question.
Advantage disclaims all liability for damage by its products caused by improper installation, maintenance,
use or attempts to operate products beyond their intended functionality, intentionally or otherwise, or any
unauthorized repair. Advantage is not responsible for damages, injuries or expenses incurred through the
use of its products.
The above warranty is in lieu of other warranties, either expressed or implied. No agent of ours is authorized
to provide any warranty other than the above.
30 Day Billing Memo Policy
Advantage Controls maintains a unique factory exchange program to ensure uninterrupted service with
minimum downtime. If your controller malfunctions, call 1-800-743-7431, provide our technician with Model
and Serial Number information. If they are unable to diagnose and solve your problem over the phone, a fully
warranted replacement will be shipped, usually within 48 hours, on a 30 Day Billing Memo.
This service requires a purchase order and the replacement is billed to your regular account for payment.
The replacement will be billed at current list price for that model less any applicable resale discount. Upon
return of your old panel, credit will be issued to your account at either 100% if your unit is in warranty or at
50% if your unit was out of warranty. The exchange covers only the panel. Electrode and enclosure are not
included.
FCC Warning
This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in
strict accordance with the manufacturer’s instruction, may cause interference to radio communications. It
has been type tested and found to comply with the limits for a class A computing device pursuant to subpart
J of part 15 of FCC Rules, which are designed to provide reasonable protection against such interference
when operated in a commercial or industrial environment. Operation of this equipment in a residential area
is likely to cause interference in which case the user, at his own expense, will be required to take whatever
measures necessary to correct the interference.
29
Notes
Common boiler blowdown valve connections.
30
-Notes-
31
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