Rinnai M060C Installation And Operation Manual page 12

Domestic Hot Water
Outlet
Central Heating
Supply
12
Connection
Gas
DWH In (Cold Inlet)
DHW Out (Hot Outlet)
CH In (CH Return)
CH Out (CH Supply)
Rinnai M-Series Condensing Boiler Combi Manual
Gas Gas
Central Heating Central Heating
Connection Size with Provided
Adapters
3/4 in. NPT
3/4 in. NPT
3/4 in. NPT
1 in. NPT
1 in. NPT
Domestic Cold
Water Inlet
Return Return