Rinnai M060C Installation And Operation Manual page 107

PC Board Wiring for the above application example
Low Water Cut-
off (If Required)
Rinnai M-Series Condensing Boiler Combi Manual
Zone Control
Thermostat 1 Thermostat 3
Thermostat 2
Pump 1
Pump 2
Pump 3
Outdoor
Temperature Sensor
107