15 14 11 12 10 13 J9-1 J9-2 J9-3 J9-4 J9-5 J9-6 J9-7 J13-1 J13-2 J13-3 J13-4 J13-5 J13-6 J7-1 J7-2 J7-3 J7-4 J7-5 J6-1 J6-2 J6-3 J4-1 J4-2 J4-3 J4-4 J2-1 J2-2 J2-3 J2-4 F1 2 3 7 6 J16 4 8 1 5 2 3 10 J5 4 1 9 7 6 8 5 11 12 13 14 15 16 J18 1 2 L N - Hall + PWM PE N L GND N L + Hall GND - PWM PE L N PE Main switch J9-1 J9-2 J9-3 J9-4 J9-5 J9-6 J9-7 J13-1 J13-2 J13-3 J13-4 J13-5 J13-6 J7-1 J7-2 J7-3 J7-4 J7-5 J6-1 J6-2 J6-3 J4-1 J4-2 J4-3 J4-4 J2-1 J2-2 J2-3 J2-4 F1 2 3 7 6 J16 4 8 1 5 2 3 10 J5 4 1 9 7 6 8 5 11 12 13 14 15 16 J18 1 2 L N - Hall + PWM PE N L GND N L + Hall GND - PWM PE L N PE L N PE L N PE J9-1 J9-2 J9-3 J9-4 J9-5 J9-6 J9-7 J13-1 J13-2 J13-3 J13-4 J13-5 J13-6 J7-1 J7-2 J7-3 J7-4 J7-5 J6-1 J6-2 J6-3 J4-1 J4-2 J4-3 J4-4 J2-1 J2-2 J2-3 J2-4 F1 2 3 7 6 J16 4 8 1 5 2 3 10 J5 4 1 9 7 6 8 5 11 12 13 14 15 16 J18 1 2 L N - Hall + PWM PE N L GND N L + Hall GND - PWM PE L N PE L N PE 17 16 15 14 11 12 10 13 17 16 19 18 19 18 LW HL TG PG 1 2 20 20 23 22 23 22 0-10 Vdc input (+) 25 24 25 24 Cascade header sensor Cascade header sensor 0-10 Vdc input (GND) RS 485 Modbus GND RS 485 Modbus T- RS 485 Modbus T+ RGPR RGPS Bus (HC command) Bus (HC command) Outdoor sensor (OS) Outdoor sensor (OS) Tank sensor (TS) Tank sensor (TS) Room thermostat (RT) Room thermostat (RT) F1 = T 10 L 250V (10A Ritardato) F3 = T 3 L 250V (3A Ritardato) F4 = T 3 L 250V (3A Ritardato) F6 = T 3 L 250V (3A Ritardato) 110V 110V L CH N L DHW J9-1 J9-2 J9-3 J9-4 J9-5 J9-6 J9-7 J13-1 J13-2 J13-3 J13-4 J13-5 J13-6 J7-1 J7-2 J7-3 J7-4 J7-5 J6-1 J6-2 J6-3 J4-1 J4-2 J4-3 J4-4 J2-1 J2-2 J2-3 J2-4 F1 2 3 7 6 J16 4 8 1 5 2 3 10 J5 4 1 9 7 6 8 5 11 12 13 14 15 16 J18 1 2 L N - Hall + PWM PE N L GND N L + Hall GND - PWM PE L N PE PS + 5V L N PE DISPLAY MASTER Burner SLAVE EXUQHU 1 RPP1 110V RPP2 110V RPP3 110V RPP4 110V F2 = T 10 L 250V (10A Ritardato) 27 26 27 26 External Reset External Reset SLAVE EXUQHU 1 SLAVE EXUQHU 1 Ground Neutral Hot 120 Vac 60Hz Heating pump Line (max 3A) Alarm (NO) Volt free Alarm (NO) Volt free PE 101 102 105 106 107 108 109 110 PE 101 102 105 106 107 108 109 110 Heating pump Neutral (max 3A) DHW PUMP Line (max 3A) DHW PUMP Neutral (max 3A) 113 114 113 114 Local pump Line (max 3A) Local Pump Neutral (max 3A) LWCO 103 104 103 104 LWCO 9 8 9 8 Header sensor (HS) Header sensor (HS) 29 28 29 28 Bus (cascade) Bus (cascade) Ground Ground Ground