SJE RHOMBUS 312 Three Phase Simplex Control Panel Instruction Manual
- June 1, 2024
- SJE RHOMBUS
Table of Contents
SJE RHOMBUS 312 Three Phase Simplex Control Panel
Specifications
- Model: 312 Three-Phase Simplex
- Operating Voltage: Three Phase
- Enclosure Type: UL Type 4X
- Warranty: 5-year limited warranty
- Manufacturer: SJE Rhombus
Parts Included
WARNING: ELECTRICAL SHOCK HAZARD
Disconnect all power sources before servicing. Failure to do so could result
in serious injury or death.
This control panel must be installed and serviced by a licensed electrician by the National Electric Code NFPA-70, and state and local electrical codes. UL Type 4X enclosures are for indoor or outdoor use.
Warranty void if the panel is modified.
INFO: For information regarding the operation, available options, or
servicing questions, please call SJE Rhombus Technical Support.
SJE Rhombus offers a five-year limited warranty.
For complete terms and conditions, please visit
www.sjerhombus.com.
Products returned must be cleaned, sanitized, or decontaminated as necessary before shipment to ensure that employees will not be exposed to health hazards in handling said material. All applicable laws and regulations shall apply.
Installing the Float Switches
The Model 312 Three Phase Simplex control panel operates with 3 float switches to activate pump STOP, START, and high-level ALARM functions.
- WARNING: Ensure all power is turned OFF before installing Floats in the tank. Failure to do so could result in serious or fatal shock.
- Label each FLOAT and cord end with the provided pairs of STOP, START, and ALARM stickers.
- Caution: If the Floats are not properly mounted and connected in the correct order, the pumps will not function properly.
Mounting the Control Panel
NOTE: If the distance to the control panel exceeds the length of the float switch cords or the pump power cord, splicing in a liquid-tight junction box will be required. For outdoor or wet installation, we recommend an SJE Rhombus UL Type 4X junction box
Floats require a free range of motion.
They must not touch each other or any equipment in the pump chamber.
Pipe Clamp Mounting – Float Operation
Wiring the Control Panel
- Determine conduit entrance locations on the control panel as shown.
- Check local codes and schematic inside the panel for the number of power circuits required.
CAUTION: Be sure the pump power voltage and phase are the same as the pump motor being installed.
Connect the following wires to the proper terminal positions:
- incoming power
- pump
- float switches
See the schematic inside the control panel for details.
CAUTION: You must use conduit sealant to prevent moisture or gases from
entering the panel.
Type 4X conduit must be used to maintain a Type 4X rating of the control
panel.
Verify the correct operation of the control panel after installation is complete.
Typical Layout (May vary with options ordered).
Operation
Alarm System (Horn and Indicator)
When an alarm condition occurs, a red light and a horn will be activated. If
the test/normal/silence switch is moved to the silence position, the horn will
be silenced. When the alarm condition is cleared, the alarm system is reset.
The alarm system can be tested by moving the test/normal/silence switch to the
test position.
HOA Switch
A hand-off -automatic switch is provided for the pump. In the hand mode, the
pump will turn on unless other safety features are employed. In the automatic
mode, the pump will turn on from commands by the float switches.
Motor Protective Switch
A motor protective switch is supplied for the pump to provide an adjustable
overload, branch circuit protection, and disconnect. The overload must be set
in the field. To set the overload, dial the amp scale to the pump’s full load
amps (FLA). If the FLAs are unknown, use a calibrated amp meter to measure the
pump amperage draw under loaded conditions. An auxiliary contact is wired in
series with the magnetic contactor coil so that on an overload trip, the
magnetic contactor will be disabled. In the event of an overload trip, the
motor protective switch must be reset by first turning the handle
counterclockwise to the OFF position and then turning the handle 90° clockwise
to the ON position.
Pump Run Light
The run light will be ON in either the hand or the automatic mode when the
pump is called to run.
Dry Auxiliary Contacts (optional) Normally open – Contacts are open under
normal conditions and closed when an alarm condition is present. Normally
closed – Contacts are closed under normal conditions and open when an alarm
condition is present.
Both types automatically reset once the alarm condition is cleared.
Seal Failure Circuit and Indicator Light (Optional)
The seal fail circuit has resistance sensitivity and will sense the presence
of water in the pump seal chamber. Upon installation, turn the sensitivity
dial on the seal fail module to the point where the light turns on, then dial
back slowly until the light turns off . If water enters the seal chamber at
this point, the seal chamber circuit will sense a change in resistance. After
a short time delay, the indicator light will turn on. When the condition is
cleared, the relay will de-energize and the indicator light will turn off .
The seal fail relay has a sensitivity adjustment so that false readings may be
tuned out.
Thermal Cutout (Optional)
The thermal cutout circuit is wired in series with the magnetic contactor
coil. If the pump’s thermal switch opens at high temperature, the magnetic
contactor will turn off and stop the pump. When the thermal switch cools and
closes, the magnetic contactor will turn on if the pump is called to run.
The model shown contains optional Seal Fail circuitry.
COMPONENTS
- a. ON/OFF Switch – Control/Alarm Power
- b. 120V Incoming Power Terminals
- c. Power LED – (Green)
- d. Pump HOA Switch
- e. Float LEDs – (Red) x3
- f. Pump LED
- Pump Run – (Green)
- Pump Fail – (Red)
- g. Simulate Float Buttons x3
- h. Float Terminals x6
- i. Seal Fail Pot – (Optional)
- j. Seal Fail LED – (Red) – (Optional)
- k. Auxiliary Alarm Terminals
PROGRAMMING INSTRUCTIONS
WITH POWER ON, HOA OFF, FLOATS OFF OR DISCONNECTED, PRESS DESIRED FLOAT BUTTON RAPIDLY 4 TIMES AND HOLD
PUMP LED WILL FLASH UPON SUCCESSFUL PROGRAMMING
OPTIONS| FLOAT BUTTON| DEFAULT| OPERATION
MANUAL ALARM RESET| STOP| OFF| LATCHES HIGH ALARM: CLEAR WITH EXTERNAL TEST
SWITCH
SEAL FAIL ALARM ACTIVATION| START| OFF| ACTIVATES HORN UPON SEAL FAIL
ALARM FLASHER| ALARM| OFF| FLASHES BEACON UPON HIGH ALARM
ALARM CONDITIONS
WITH POWER ON, HOA OFF, FLOATS OFF OR DISCONNECTED, PRESS DESIRED FLOAT BUTTON RAPIDLY 4 TIMES AND HOLD
PUMP LED WILL FLASH UPON SUCCESSFUL PROGRAMMING
OPTIONS| FLOAT BUTTON| DEFAULT| OPERATION
MANUAL ALARM RESET| STOP| OFF| LATCHES HIGH ALARM: CLEAR WITH EXTERNAL TEST
SWITCH
SEAL FAIL ALARM ACTIVATION| START| OFF| ACTIVATES HORN UPON SEAL FAIL
ALARM FLASHER| ALARM| OFF| FLASHES BEACON UPON HIGH ALARM
Contact
- Technical Support: +1-800-746-6287
- techsupport@sjeinc.com
- www.sjerhombus.com
- Technical Support Hours: Monday – Friday, 7 A.M. to 6 P.M Central Time
FAQ
- Q: What should I do if the floats are not functioning properly?
- A: Ensure floats are properly mounted and connected in the correct order. Check for any obstructions that may be hindering float movement.
- Q: Can I install the control panel myself?
- A: The control panel must be installed and serviced by a licensed electrician in compliance with electrical codes for safety and warranty purposes.