Noritz NRC111-SV Manuel D'installation page 43

Filling the neutralizer unit with water
The neutralizer unit can be filled before connecting the vent pipe.
Filling the neutralizer unit before vent pipe installation.
DANGER
Please follow one of the procedures described below to ensure that the neutralizer unit is filled with water.
1) Fill the neutralizer unit by pouring approx. 17 oz.(500ml) of water into the exhaust accessory on the top of
the appliance as illustrated below.
Or, if the vent pipe has already been installed:
2) After installing the drain pipe, make sure that the area around the appliance is well ventilated; open a
window or a door if necessary.
Then, operate the unit and verify that condensate is coming out of the drain pipe.
(During normal use of the water heater, condensate will begin to discharge from the drain pipe within 15 minutes
of use. However, depending on the season and/or installation site conditions, it may take longer.)
Prior to initial start up, make sure that you fill the neutralizer unit with water.
This is to prevent dangerous exhaust gases from entering the building.
Failure to fill the neutralizer unit could result in severe personal injury or death.
Intake
17 oz.
500ml
Exhaust
43