Filling The Neutralizer Unit Before Vent Pipe Installation; Condensate Piping (All Mc Models Only) - Noritz NR50-OD Service Manual

Filling the Neutralizer Unit before Vent Pipe Installation.

Prior to initial start up, make sure that you fill the neutralizer unit with water.
DANGER
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.
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.)
Electrical
The electrical power supply to the unit should be installed by a qualified electrician.
Allocate 2A on the circuit for this water heater.
If more than one unit is being installed, allocate an appropriate circuit to provide power for each unit.

Condensate Piping (all MC models only)

NCC199/N-0841MC/NRC111/N-0842MC series is a high efficiency, fully condensing appliance which
produces condensate during operation. The water heater incorporates a collection, neutralization, and
removal system which must be properly drained in order to ensure proper operation of this appliance.
The water heater is supplied with a pre-installed condensate neutralization system. No additional neu-
tralizer is required unless local code dictates otherwise.
In order to drain the condensate, a 1/2" threaded fitting is provided at the base of the water heater. Do
not reduce the size of this fitting or the drain piping to less than 1/2".
Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material which
can corrode when placed into contact with water.
Keep the length of the drain pipe as short as possible. Long runs or applications where the nearest drain
is above the water heater will require the use of a condensate pump. Size the pump to allow for a
maximum condensate discharge of 2 GPH from the water heater.
Horizontal runs must be sloped 1/4" per foot towards the drain or condensate pump.
The end of the drain pipe must not be submerged in water or blocked in any way.
Be sure to check that condensate is freely flowing from the drain piping after the system has been
installed. Condensate will begin flowing out of the water heater within 15 minutes after operation has
started.
Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heat-
ers, etc.).
Condensate Piping to Floor Drain
DO NOT FIT
ANY VALVES
Slope pipe downwards
1/4" per foot.
Floor drain
Intake
1/2" PVC pipe
The end of the drain pipe
must have an air gap.
Slope pipe downwards
1/4" per foot.
KEEP CLEARANCE
95
17 oz.
500ml
Exhaust
Condensate Piping with Pump
1/2" PVC pipe
3/8" ID tubing*
1/2" PVC elbow
Condensate Pump
The end of the drain pipe
* Install tubing according to pump
must have an air gap.
manufacturer's instructions.