Noritz NRCB199DV Owner's Manual

Also see for GHQ-C2801WX-FF US: Instructional manual Installation manual

Contents

30Periodic Maintenance• Anti freeze products may be used for the heating system. Anti freeze for new or existing systemsrequires specially formulated glycol, which contains inhibitors to prevent the glycol from attackingthe metallic system components.• Before using anti freeze products, ensure that system fluid contains proper glycol concentrationand the inhibitor level is appropriate. Noritz recommends against exceeding a 50% concentrationof glycol.• When using the anti freeze products, the system must be tested at least once a year, and asrecommended by the manufacturer of the glycol solution.When Using Anti-Freeze1. The Operation Panel is OFF and disconnect the power cord to the Combi Boiler.2. With a bucket ready, remove the inlet and outlet drain plugs (about 0.76 gallon (2.9 L) will drain out)3. Remove the water drain valve (with water filter) out of the inlet. (See illustration below).4. Clean the water drain valve (with water filter) with a brush under running water.5. Replace the water drain valve (with water filter) and close the drain plugs.(Take care not to lose the packing.)6. Plug back the power cord and press the power button to power the unit on and check that water does notleak from the drain plugs or water drain valve (with water filter) and readjust the clock time. ( p. 13)Heating Water InletWater Drain Valve (with Water Filter)InletPackingWater drain valve(with water filter)Holes for pliers* If it is difficult to remove the heating water inletdrain plug:Use a needle-nose pliers and insert the tips ofpliers into the holes shown below illustration.Regular Maintenance-2