Hunter PSR-52 Pump Start Relay Intermittent with ESP-SMT

New system: ESP-SMT indoor timer, Hunter PSR-52 pump start relay. Relay works intermittently in manual mode. Wires loop inside relay box (wrong entry side). Pump is 240V. 10-2 wire for pump, 18-2 for 24V relay (12 ft from controller). Controller mounted above pump in garage.

Wire Routing Not the Issue

As long as connections are tight at both ends, wire path inside the box doesn't matter.

Voltage Test at Controller

1. Run system manually
2. Measure VAC at controller P/MV terminal vs Common
3. Should be consistent 22-26 VAC
4. If voltage drops/flickers → Controller issue
5. If voltage steady → Relay or wiring to relay issue

Next Steps

• Check 24V at relay coil terminals during failure
• Verify 240V pump circuit breaker not tripping
• Ensure relay coil rated for 24VAC (not 120V)

18-2 wire is adequate for 12 ft at 24VAC. Controller plug-in transformer should handle relay coil current.