36This drawing is meant to show system piping concept only.Installer is responsible for all equipment& detailing required by local codes. Refer to page 43 for electrical wiring instructions.3. Zoned with Pumps[CN233]T - TZONE 1PRESSUREGAUGEPRESSUREREDUCING VALVE ZONE 2 ZONE 3BACKFLOWPREVENTERMAKE UP WATERBALL VALVE(TYPICAL)EXPANSIONTANKNot to exceed 4 pipe Dia or Max. 12” APARTHeating ReturnHeating SupplyZONE1PumpT/TT/TFLOW CHECKVALVE(TYPICAL)ZONE PUMPS(TYPICAL)Wiring DiagramZONE2PumpZONE3PumpZONE1 ZONE2ZONE CONTROLLERZONE3T/T T/T* In case of installing external water feeder.AIR SEPARATORDHW SupplyDHW Cold Water SupplyAuto FeederAdditional Zone

Noritz NRCB199DV Installation Manual

NRCB180DV

Important Safety Information

Main Unit

Operation Panel

Initial Operation

Clock Setting

Setting Domestic Hot Water Temperature (DHW)

Setting Heating Temperature

Setting DHW Preheat Timer

Activate DHW Preheat

Customizable Settings <User Mode

Guide for Functions

View Technical Data

Preventing Damage from Freezing

Regular Maintenance

Troubleshooting

Follow-up Service

gas conversion

Specifications

NRCB199DV