Myron L 760-A Aquaswitch - Manual (Page 3)

SECTION 1
Introduction
1.1 SCOPE
This manual provides the necessary information to install,
operate and maintain the Myron L Company’s Aquaswitch/760-
A Aquaswitch. Sections 1 through 3 provide the user with an
applicational description, mounting, wiring and operational
procedures. Section 4 identifies 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
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 specifications for the 760-A Aquaswitch also apply to resistivity
Controller models 760-A2, and 760-A3 unless otherwise
indicated.
1.1.2 APPLICATIONS
1 Deionization (Dl) ultra-pure water treatment systems
2 Electronics
3 Food Processing
4 Plating
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.)
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
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