INSTALLATION
INSTRUCTIONS
Rapid City, SD, USA, 02/2010
MODEL ALT-XXX-3-SW
Revision C1
II_ALT-XXX-3-SW_C1
2880 North Plaza Drive, Rapid City, South Dakota 57702
(800) 843-8848 · (605) 348-5580 · fax (605) 348-5685
BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!
FOLLOW NATIONAL, STATE AND LOCAL CODES.
SymCom’s PumpSaver
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION.
®
Model ALT-XXX-3-SW is designed to alternate between two loads. It is
commonly used in duplex pumping applications to balance the run time of two pumps (loads). The
loads may run one at a time or simultaneously. The voltage designation must be specified in the
part number.
The Model ALT-XXX-3-SW uses three inputs (1 Lead, 1 Lag and 1 Stop) and has two outputs for
controlling operation of the two loads. The inputs to the PumpSaver
®
are usually floats that close or
open depending on fluid level. The Lead and Lag float switch inputs actuate latching relays and the
Stop float switch input unlatches both relays. The user has the option to force one load to run
exclusively at all times when the other load has been removed for maintenance or repair.
The Model ALT-XXX-3-SW activates Load 1, Load 2, or both, based on the current adjustment knob
position and the previous action. Example: In the AUTO setting, if Load 1 activated as the lead
pump previously, Load 2 will be the lead pump in the current cycle.
CONNECTIONS
1. The ALT-XXX-3-SW requires an 8-pin socket, part number OT08 (sold separately).
2. Mount the PumpSaver
If the location is wet or dusty, it should be mounted in a NEMA 4 or 12 enclosure.
NOTE: See Figure 3 for a typical wiring diagram showing the following connections.
3. Connect one pump’s magnetic contactor coils (M1) between socket terminal 8 and L2 of
the power supply
4. Connect the other pump’s magnetic contactor coil (M2) between socket terminal 7 and L2
of the power supply
5. Connect the power supply L1 to socket terminal 3 and power supply L2 to socket terminal
6.
6. Connect lead switch device between socket terminal 1 and L1.
7. Connect lag switch device between socket terminal 2 and L1.
8. Connect stop switch device between socket terminal 4 and L1.
9. Plug the Model ALT-XXX-3-SW into the socket.
®
socket in a convenient location in or near the pump control panel.
© 2010 SymCom, Inc. All Rights Reserved 2
Figure 1: Pin-Out Diagram
re 2: Connections for Input Pow
Figu
Magnetic Contactors, and Pumps
er,
Figure 3: Typical Wiring Diagram
© 2010 SymCom, Inc. All Rights Reserved 3
SETTINGS
Figure 4: User-Selectable Options
To let the unit automatically select the load to be activated next, set the dial to “AUTO”. Turn the
adjustment knob to the selected load to allow only that specific load to be activated. This de-activates
the other load if it is currently activated. This allows one pump to be taken out of the circuit for repair
or replacement. See Figure 4.
Lock-out power to the ALT-XXX-3-SW before attempting to repair or replace
wiring or loads.
OPERATION
The ALT-XXX-3-SW has built-in fail-safe technology that prevents many float malfunctions from
causing a tank to overflow.
The operation of the outputs is governed by the following rules:
1. If all three float switches are open, no loads are activated.
2. If the Lead switch is closed, regardless of the Stop switch position, at least one load will be
activated.
3. If the Lag switch is closed, regardless of the Lead switch position, both loads* will be
activated.
4. If the pot is turned to force one of the loads, then only the selected load* may be activated.
*NOTE: If the Stop switch fails to close, Load 2 will be unable to activate.
Apply power to the system. Indicator lights will show which loads, if any, are currently active.
Table 1 describes which load(s) is active according to the current and previous status of the
switches.
© 2010 SymCom, Inc. All Rights Reserved 4
CYCLE SWITCH/SENSOR EVENT LOAD 1 LOAD 2
1 None (just starting up) OFF OFF
1 Stop Switch Closes OFF OFF
1 Lead Switch (1) Closed/Activated from OFF state ON OFF
1 Lead Switch (1) Closed and Lag Switch (2) Closed
from OFF state
1 Lag Switch Opens; Lead Switch Opens ON ON
1 Stop Switch Opens OFF OFF
2 Stop Switch Closes OFF OFF
2 Lead Switch (1) Closed/Activated from OFF state OFF ON
2 Lead Switch (1) Closed and Lag Switch (2) Closed
from OFF state
2 Lag Switch Opens; Lead Switch Opens ON ON
2 Stop Switch Opens OFF OFF
Table 1: Inputs and On/Off States During Normal Float Operation
ON ON
ON ON
© 2010 SymCom, Inc. All Rights Reserved 5
INDICATOR LIGHTS STATUS
LD1 ON LOAD 1 ACTIVE
LD2 ON
LD1 AND LD2 ON LOAD 1 AND LOAD 2 ACTIVE
NO LIGHTS NO LOAD ACTIVE
LIGHTS ALTERNATING OUT-OF-SEQUENCE ALARM
Table 2: Diagnostic Indicator Lights
LOAD 2 ACTIVE
TROUBLESHOOTING
SYMPTOM
Device is not functioning
properly
OUT-OF-SEQUENCE
ALARM
LIGHT
PATTERN
N/A
LIGHTS
ALTERNATING
SOLUTION
No lights will be on during normal operating
conditions if no switches are closed. Verify float
switches are functioning properly and all
connections are good.
Measure the input voltage. If the voltage is below
the minimum listed in the Specification Table, the
PumpSaver® alternating relay does not have
enough power to operate its internal electronics.
If the voltages are correct, call SymCom at (800)
843-8848 or (605) 348-5580.
The ALT-XXX-3-SW has detected one of the
switches has opened or clos ed out of the proper
sequence. Check for the following conditions that
may be causing the alarm: 1.) Stop switch stuck
open 2.) Lead switch stuck open or closed 3.) Lag
switch stuck closed
DIMENSIONS
2.375”
(60.331)
BOTTOM
*Use of the OT08-PC or
RB08-PC octal socket,
manufactured by Custom
Connector Corp., is
required for the MotorSaver
to qualify as a UL Listed
device. The OT08-PC is
35mm DIN rail compatible.
WITH OT08* SOCKET
SIDE
© 2010 SymCom, Inc. All Rights Reserved 6
1.75”
(44.55)
4.125”
(104.65)
PUMPSAVER® ALT-XXX-3-SW SPECIFICATIONS
Functional Characteristics Debounce Time Delay 5 seconds Input Characteristics
Line Supply Voltage ALT-100-3-SW 95-120VAC ALT-200-3-SW 190-240VAC Frequency 50/60Hz
Output Characteristics Output Contact Rating
Pilot Duty 480VA @ 240VAC General Purpose 10A @ 240VAC
General Characteristics Environmental
Ambient Operating Temperature Relative Humidity 10-95%, non-condensing per IEC 68-2-3
Maximum Input Power 5 W Standards Passed
Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air Radio Frequency Immunity, Radiated 150 MHz, 10V/m Fast Transient Burst IEC 61000-4-4, Level 3, 3.5kV input power and
Surge Immunity IEC IEC 61000-4-5, Level 3, 4kV line-to-line; Level 4, 4kV
ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level
Hi-Potential Test Meets UL508
Safety Marks UL listed (OT08 octal socket
required)
CE IEC 60947-6-2
Dimensions 1.750” H x 2.375” W x 4.125” D (with socket) Weight 9 oz. Enclosure Polycarbonate Mounting Method Plugs into OT08 Socket; can be mounted to DIN rail
Wire Gauge 12-22 AWG Solid or Stranded Terminal Torque for P/N OT08 Socket 12 in. – lb
1
-40° to 70°C (-40° to 158°F)
controls
line-to-ground
of 6kV line-to-line
(2 x rated V +1000 V for 1 minute)
UL508 (File #E68520)
or surface mount
1
The ambient air temperature is the air temperature directly surrounding the product.
© 2010 SymCom, Inc. All Rights Reserved 7
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www.symcom.com
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800-843-8848
© 2010 SymCom, Inc. All Rights Reserved 8
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