Myron L 760-A User Manual
AQUASWITCH
Water Quality Instrumentation
Accuracy • Reliability • Simplicity
AQUASWITCH &
760-A AQUASWITCH
Operation Manual
INSTALLATION • OPERATION • MAINTENANCE
22 August 05
ACCURACY • RELIABILITY • SIMPLICITY
TABLE OF CONTENTS
SECTION PAGE
1 INTRODUCTION
1.1 SCOPE ................................................................................................................................. 1
1.1.1 Functional Descriptions ............................................................................................1
1.1.2 Applications..................................................................................................1
1.2 SPECIFICATIONS ................................................................................................................1
1.2.1 Aquaswitch ...............................................................................................................1
1.2.2 760-A Aquaswitch ..................................................................................................... 1
1.2.3 HP Solenoid Pilot Valves .......................................................................................... 2
1.2.4 Resistivity Cell ..........................................................................................................2
1.3 HOW TO ORDER ................................................................................................................. 2
2 INSTALLATION
2.1 GENERAL............................................................................................................................. 3
2.2 MECHANICAL INSTALLATION............................................................................................. 3
2.2.1 Surface Mounting .....................................................................................................4
2.2.2 Panel Mounting Installation ......................................................................................4
2.2.3 HP Solenoid Pilot Valve Installation .........................................................................4
2.2.4 Cell Installation ........................................................................................................4
2.3 ELECTRICAL INSTALLATION ............................................................................................. 5
2.3.1 Aquaswitch Main AC Power ..................................................................................... 5
2.3.2 760-A Aquaswitch Main AC Power .......................................................................... 5
2.3.3 220 VAC Conversion ...............................................................................................6
2.3.4 Pilot Valve Solenoid Connections (Also see pg. 13) ................................................6
2.3.4.1 Optional Solenoid Power .......................................................................... 6
2.3.5 Cell Connections ......................................................................................................6
2.3.6 Alarm Relay ............................................................................................................. 7
3 OPERATING PROCEDURES
3.1 GENERAL ............................................................................................................................8
3.2 SWITCH AND INDICATOR CONTROLS..............................................................................8
3.3 OPERATIONAL CHECK-OUT PROCEDURES ................................................................... 9
3.3.1 760-A Aquaswitch .................................................................................................... 9
3.3.2 Aquaswitch ..............................................................................................................9
4 COMPONENT IDENTIFICATION, CALIBRATION AND PREVENTIVE CARE
4.1 GENERAL........................................................................................................................... 10
4.2 PRIMARY COMPONENT IDENTIFICATION ..................................................................... 10
4.3 “PURGE CYCLE” CALIBRATION PROCEDURES ............................................................ 11
4.4 “ALARM RESET” JUMPER ADJUSTMENT ....................................................................... 12
4.5 760-A AQUASWITCH CALIBRATION PROCEDURES .....................................................12
4.5.1 Meter Mechanical Zero Reading ............................................................................12
4.5.2 Internal Set Point Adjustment .................................................................................12
4.5.3 Full Scale Calibration Procedures ..........................................................................13
4.6 PREVENTIVE CARE ......................................................................................................... 13
5 APPENDIX
A REPLACEABLE COMPONENTS CHART..........................................................................14
B WARRANTY........................................................................................................................14
SECTION 1
Introduction
1.1 SCOPE
This manual provides the necessary information to install,
operate and maintain the Myron L Company’s Aquaswitch/760A Aquaswitch. Sections 1 through 3 provide the user with an
applicational description, mounting, wiring and operational
procedures. Section 4 identies their primary components and
provides the user with easy-to-use calibration and preventive care
procedures.
Section 5 (Appendix A) provides an easily understood Replaceable
Components Chart.
1.1.1 FUNCTIONAL DESCRIPTIONS
Both instruments have drip/weather-proof housings which can be
panel or surface mounted. The Aquaswitch is packaged within
a compact 6.0" x 4.8" (152mm x 122mm) housing. The 760-A
Aquaswitch is packaged within a 6.0" x 10.8" (152mm x 274mm)
housing. The standard Aquaswitch does not monitor water quality
itself, but should be used with any reliable resistivity controller
such as the Myron L Company’s 750/760 Series Resistivity
Controllers.
NOTE:
The 760-A Aquaswitch is an integrated unit requiring no other
Controller.
AQUASWITCH
Provides automatic switching from exhausted to fresh Dl banks;
push-button override for immediate bank change-over; adjustable
purge timer for “FAILSAFE” operation; front panel LED displays
provide continual status of both Dl banks; and an alarm is
automatically activated as each bank is depleted.
760-A AQUASWITCH
5 Power Plants
6 Laboratories
1.2 SPECIFICATIONS
1.2.1 AQUASWITCH
INPUT POWER:
115 VAC ±15%
220 VAC ±15% (user changeable to 220 VAC)
OUTPUT POWER:
24 VAC (Standard if ordered with Myron L valves)
115 VAC (Standard if ordered without Myron L valves)
220 VAC (Optional)
MAXIMUM LOAD PER VALVE OUTPUT:
200 milliamps;
( 5 watts for a 24 V valve)
(25 watts for a 115 V valve)
(50 watts for a 220 V valve)
AMBIENT TEMPERATURE RANGE:
-22°F (-30°C) to 140°F (60°C)
HOUSING CONSTRUCTION:
Fully gasketed heavy-duty ABS for corrosion resistance.
Rated NEMA type 3.
DIMENSIONS:
Aquaswitch:
6" (152mm) H x 4.8" (122mm) W x 3.8" (97mm) D
760-A Aquaswitch:
6" (152mm) H x 10.8" (274mm) W x 3.9" (99mm) D
SHIPPING WEIGHT:
Aquaswitch: 3 Ibs. (1.36 kg.)
760-A Aquaswitch: 5 Ibs. (2.27 kg.)
The 760-A Aquaswitch combines the operating features of the
standard Aquaswitch with the additional features of a resistivity
Controller. These include: a linear display meter and a front panel
accessible “SET POINT CHECK” switch. (Set point setting is
internal to discourage unauthorized adjustments).
NOTE:
All specications for the 760-A Aquaswitch also apply to resistivity
Controlle r models 760-A2, and 760-A3 u nless otherwise
indicated.
1.1.2 APPLICATIONS
1 Deionization (Dl) ultra-pure water treatment systems
2 Electronics
3 Food Processing
4 Plating
ALARM RELAY CONTACT RATING:
SPDT 10 amp @ 250 VAC (Non-Inductive), 30 VDC
1.2.2 760-A AQUASWITCH
RANGE:
0-20 megohm-cm
0-2 megohm-cm (Model 760-A2)
0-200 kilohm-cm (Model 760-A3)
READOUT:
4 1/2" (114mm) Analog
ACCURACY:
±2% of span
CELL INPUT:
1 CS10 Series cell required
RELAY FUNCTION:
Single set point control
Continuously adjustable 0-100% of span
SPDT 10 amp @ 250 VAC (Non-lnductive), 30 VDC
1
1.2.3 HP SOLENOID PILOT VALVES
DESCRIPTION: Being corrosive, ultra-pure water can be difcult to
control. Myron L HP valves solve this problem by utilizing tap water
or air to open and close the diaphragm. HP valves, therefore, are
ideal for use with the Aquaswitch and many other water corrosive
solution applications.
SPECIFICATIONS
SIZES:
1", 2", or 3" IPS; compatible with plastic or metal piping.
POWER:
24 VAC (2 watts)
MATERIALS:
Body: Dupont ZYTEL (33% glass reinforced NYLON)
Diaphragm: NYLON reinforced BUNA N synthetic rubber
O Ring: DELRIN
Exterior Metal: 18-8 stainless steel (1"); brass (2" and 3")
OPERATING PRESSURE:
N.O.: 3-90 psi (21-620 kPa)
N.C.: 3-150 psi (21-1034 kPa)
PRESSURE LOSS: (See chart below)
WATER TEMPERATURE:
40°F (4°C) to 185°F (85°C)
SOLENOID PILOT PRESSURE:
Water: Min. - equal to Dl water line pressure
Max. N.O. - 90 psi/max. N.C. - 150 psi
Air: Min. - 2X Dl water line pressure Max N.O. - 90m psi
Max. N.C. - 150 psi
1.2.4 RESISTIVITY CELL
DESCRIPTION: The 760-A Aquaswitch uses a CS10 Cell.
These reliable sensors feature two integral thermistors to ensure
accurate and rapid automatic temperature compensation. The
sturdy polypropylene bushing is modular for easy, inexpensive
replacement. Several alternatives for the metal portion of the cell
are available, depending on the demands of the application.
CS10 CELL SPECIFICATIONS
CONSTANT:
0.05
TEMPERATURE COMPENSATION:
Two integral thermistors provide automatic TC to 25°C over
the range of 0-100°C (32-212°F)
PRESSURE/TEMPERATURE LIMITS:
100 psi (690 kPa) / 212°F (100°C)
BUSHING:
Modular Polypropylene threaded .75" NPT
CABLE:
Shielded; 10'(3 meters) standard; Prespecied lengths up to
100' (30 meters) also available.
DIMENSIONS:
Metal portion 3.75" (95mm)L; 0.5" (13mm) DIA
1.3 HOW TO ORDER
1. Choose either the Aquaswitch or 760-A Aquaswitch
2. If 760-A Aquaswitch, also select a resistivity cell:
CS10-S (316 stainless steel)
CS10-T (titanium)
CS10-M (Monel*)
3. Valves (three or four are required):
024-1HP (1 “ 24v)
024-2HP (2" 24v)
024-3HP (3" 24v)
4. 24V power is required for use with 24V valves such as 024-
HP series. A 115V to 24V step-down transformer accessory
is available. Order Model VR.
Example of a complete system: 760-A Aquaswitch with CS10-S
cell, VR transformer and 4 Model 024-1HP valves.
*TM Huntington Alloy, Inc.
2
SECTION 2
Installation
2.1 GENERAL
Section 2.2 provides the user with the recommended procedures
for mounting the Aquaswitch/760-A Aquaswitch and for completing
their necessary electrical installation.
NOTE:
The Myron L Company recommends that all mounting and electrical
installation procedures be performed by trained and authorized
personnel ONLY! Failure to do so could result in damage to
equipment and/or property
2.2 MECHANICAL INSTALLATION
All Aquaswitch and 760-A Aquaswitch electronics are packaged
inside drip/weather-proof housings. Their physical dimensions have
been designed to allow for both surface and panel mounting.
There are three basic guidelines to consider when selecting the
Aquaswitch’s mounting location:
1 Select a site that limits the Aquaswitch’s exposure to
excessive moisture and corrosive fumes.
2 For best results, position your control area as close as
possible to the point(s) being controlled
3
NOTE:
The 760-A Aquaswitch is not designed to operate with a Cell cable
length that exceeds 100' (30 meters).
3 If at all possible, mount the Controller at eye level for
viewing convenience.
2.2.1 SURFACE MOUNTING
NOTE:
Surface mounting will require two (2) user supplied 1/4” 20
mounting screws See, Fig. 2-1 for hole drilling locations. For ease
of surface mounting, a surface mounting plate is available.
Order Part No.: SMP50 for Aquaswitch
SMP60 for 760-A Aquaswitch
STEP 1 Select your site location. Mark and drill the two (2) required
mounting holes.
STEP 2 lace the mounting threads in alignment with the surface
mounting holes.
STEP 3 Insert and securely fasten the two (2)1/4':20 mounting
screws.
2.2.2 PANEL MOUNTING INSTALLATION
A panel mounting fastening kit is provided with all Aquaswitch/
760-A Aquaswitch enclosures. Panel mounting will require the use
of the fastening kit’s two (2) 4-40 mounting screws/nuts or two
(2) #4 x 1/2 “ sheet metal screws. See Fig. 2-1 for panel cutout
dimensions.
STEP 1 Select your site location, mark the appropriate pane I cut
out and complete the necessary panel cut.
STEP 2 Carefully unfasten and separate the front panel from its
enclosure.
STEP 3 Disconnect all panel cable(s)/wires from the enclosure’s
component board(s).
STEP 4 Slide the enclosure through the panel cutout until its ange
contacts the panel.
STEP 5 Insert mounting screws through the ange mounting holes
and tightly secure.
STEP 6 Reconnect all panel cable(s)/wires. (See Fig. 4-1)
2.2.3 HP SOLENOID PILOT VALVE INSTALLATION
STEP 1 Insert the pilot valve unit so that the systems’ INFLOW
source and OUTFLOW process piping connecting ends
are inserted into the valve as shown in Fig. 2-2.
2.2.4 CELL INSTALLATION (MODEL 760-A ONLY)
NOTE:
Fig. 2-3 illustrates how to properly assemble and install the CS10
Cell assembly into a “T” type mounting xture. Improper assembly
could result in damage to equipment and/or property.
A CS10 Cell’s mounting orientation must provide a continuous
and adequate circulation ow to prevent the trapping of air bubbles
within the Cell’s electrode area. Failure to do so will result in
conditions that will prevent the cell from functioning properly.
STEP 1 Verify that t he Cel l co mp onents a re pro pe rly
assembled.
STEP 2 Insert the Cell assembly into the “T” mounting xture as
shown in Fig. 2-3 and tightly secure.
STEP 2 Repeat STEP 1 until all appropriate pilot valve units have
been installed.
NOTE:
The number of pilot valves used will be based upon the user’s
desired application.
4
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