Single Phase, Compact Rainwater Tank Pump Controller - SM100

General Description:
The SM100 Pump Controller has been designed specially for the management of rainwater water in domestic situations where it is being used to supplement mains pressure sources . It supports small 240V submersible pumps in compact tanks where rain water is being collected and pumped out upon demand. Where rainwater storage within the tank falls below a preset minimum, a valve will automatically operate to allow a nominated volume of town water to ‘top up’ the tank. Fail safe features ensure that pump operation will be inhibited and alarm signal sounds if town water is isolated and levels fall to a critical ‘low’ level.

Advanced Features
The SM100 controller also comes standard with a data logging system to record top-up and discharge flows. A variety of abnormal ‘alarm’ conditions are also recorded to assist troubleshooting for service staff. A windows based software package is available for use on laptop pc’s which allows rapid downloads of data to be recovered from an SM100 unit via a non-contact infrared link. The non-volatile data logger feature will allow statistical information to be collected on the mid and long term effectiveness of the rainwater collection system.
The SM100 controller is a compact wall mounted unit which will manage the operation of small submersible pump motors of up to 1.5kW. Three probes within the tank will inform the controller when the tank must begin a town water top-up cycle, halt a top-up cycle and report a critically ‘low’ level. The probes may be either submersible float switches or conductive probes set to different levels within the tank. A fourth input monitors a water pressure switch on the output side of the pump to flag the need for pump operation. A number of alarm conditions will be declared and recorded whenever normal operating parameters have been exceeded.

The controller is fully compliant with Australian AS3100 electrical safety standards (CS03057V) and with the new Electromagnetic Compatibility, EMC standards. (C-tick no. N12656)
An Alarm lamp and Alarm buzzer are present to signal critical faults to the resident. Different flash rates are used to indicate different faults. Pump hourmeter counts are monitored by the electronic meter using a special non-volatile memory chip.
The SM100 unit features an advanced microprocessor controller bonded to the backplane within the enclosure. A two horsepower relay supports single phase 240VAC pumps with an average load current of up to 10 Amps.

Electrical connections are extremely simple. A three conductor ‘Active, Neutral & Earth’ cable from the 240V supply and a similar cable to the pump. The level sensors are simple stainless steel probes set to different levels within the tank. Probe signals are fixed at an extra safe 4Volts DC.

The enclosure is an robust polycarbonate unit rated to IP65 with an opaque lid and a rubber sealing gasket. Various LED indicators are present internally and an infrared LED mounted externally allows the infrared data transmitter to link with a PC for information downloads.

The cabinet is intended to be wall mounted. Cable access may be achieved from top, bottom, side or rear of the enclosure using conventional cable and conduit glands .

Other Features
Should tank levels become too high or too low, audible and visual alarms will be triggered for the duration of the fault. A single or double flash will indicate the fault type. The audible alarm may be suppressed for 6 hours by briefly pressing an ‘Alarm ‘Mute button on the underside of the cabinet. Motor operation is inhibited with ‘Tank Low’ alarms.

A third alarm condition will indicate the accidental reversal of the ‘High’ and ‘Low’ probes by installation staff.

A ‘Jog’ button inside the cabinet will force the Town Water solenoid to operate for a brief period. The SM100 controller contains an integral 24VAC supply which is used to activate the 24V ‘Town Water’ inlet valve.

The enclosure size is 75mm high, 186mm wide and 146mm deep. Unit weight is 0.8 Kg

The controller records pump cycles, hours of operation, alarm conditions both as running totals and within 4 hour blocks over the last 24 hours. A counter also indicates the number of hours since the last power interruption. (The infrared receiver probe and software package are available as separate product, ‘SM100 TERM’.)