Condensate Piping - Noritz NRC111-DV-NG Installation Manual

11.

Condensate Piping

• This water heater 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 ADD
ANY VALVES
Slope pipe downwards
1/4" per foot.
Floor drain
20
1/2" PVC pipe
The end of the drain pipe
must have an air gap.
MAINTAIN CLEARANCE
Condensate piping with pump
DO NOT ADD
ANY VALVES
1/2" PVC pipe
1/2" PVC elbow
Slope pipe downwards
1/4" per foot.
The end of the drain pipe
must have an air gap.
3/8" ID tubing*
Condensate pump
* Install tubing according to pump
manufacturer's instructions.