1
Overload Relay Setup
The SP-1P includes a built-in thermal overload relay. Setting the overload relay FLA correctly is the single most important commissioning step — an incorrectly set overload relay is the most common cause of motor damage in single-phase installations.
- 1Locate the FLA (Full Load Amperes) on the motor nameplate — this is labelled 'A', 'FLA', 'I', or 'Rated Current'.
- 2Set the overload relay current dial on the SP-1P front panel to match the motor nameplate FLA.
- 3Do NOT set the dial to the MCB rating, the circuit cable rating, or the contactor rating — use the motor nameplate value only.
- 4For motors with a Service Factor (SF) > 1.0, the overload relay can be set up to SF × FLA — for example, a 5A FLA motor with SF 1.15 can be protected at up to 5.75A.
- 5After setting the dial, perform a clamp meter test on the Line conductor during normal motor running — confirm the measured current is within 10% of the nameplate FLA. If significantly higher, investigate the mechanical load before assuming the overload setting is correct.
2
Motor Protection Settings
- 1RESTART DELAY: Device Settings → Motor → Restart Delay. Recommended minimum: 30 seconds for single-phase motors to prevent water hammer and capacitor stress from rapid re-starts.
- 2RUNTIME LIMIT: Device Settings → Motor → Max Runtime. Sets the maximum continuous run time before the SP-1P raises an alert and stops the motor.
- 3FAULT LATCH: Enable at Device Settings → Motor → Fault Latch to require manual app reset after any overload relay trip — prevents automatic re-start onto a faulty mechanical load.
3
Dry-Run Protection
- 1Requires HPzenAi LS-PRE level sensor in the water source, linked to the same gateway as the SP-1P.
- 2Automation → Add Rule → Trigger: Level Sensor Low → Action: Stop Motor [SP-1P name].
- 3Add restart rule: Trigger: Level Sensor Restored → Wait 3 minutes → Action: Start Motor (to allow bore to partially recover).
- 4Test dry-run protection: simulate Level Low in the app and confirm the SP-1P stops the motor within the delay period.
- 5A dry-run event is logged with sensor reading, motor runtime, and timestamp in Device → Event Log.
4
Scheduling
- 1Device → Schedules → Add Schedule. Select Daily or Weekly.
- 2Set Start Time and Stop Time for each period. Multiple schedule entries can overlap — the motor runs if any active schedule has the current time within its window.
- 3Schedules run on the gateway locally — the motor runs on schedule even without app connectivity.
- 4To temporarily bypass the schedule: tap Manual Control → Override in the app — the override holds until the next schedule start time.
5
Alerts & Notifications
- 1Enable push notifications at Account → Notifications → Motor Controller Alerts.
- 2OVERLOAD TRIP ALERT: Sent when the overload relay trips and the SP-1P detects the motor has stopped unexpectedly. Configure at Device → Alerts → Fault Alert.
- 3DRY-RUN ALERT: Sent with sensor level and motor runtime when a level-sensor rule stops the motor.
- 4RUNTIME ALERT: Sent when the motor exceeds the Max Runtime threshold.
- 5OFFLINE ALERT: Sent when the SP-1P MX-1P module loses gateway RS485 communication for more than the configured timeout. Configure at Device → Alerts → Offline Alert → Timeout (recommended: 5 minutes).
- 6All events stored in Device → Event Log — export to CSV for maintenance reporting.