Noritz ecoTOUGH NRC71 OD Installation Manual page 18

Condensate piping to floor drain
DO NOT ADD
ANY VALVES
Slope pipe downwards
1/4" per foot. or more.
Floor drain
Note:
If the drain line becomes clogged or frozen, condensate will back-up into the water heater and a "29"
error code will flash on the Display Window, ceasing operation. If this occurs, clear the clog or freeze
so that condensate can freely flow. Be sure to slope the drain pipe, use the appropriate size pipe, allow
the proper clearances, and apply freeze prevention measures (when necessary) to prevent the drain
line from clogging or freezing.
18
▲The illustration is an example. Please check with the actual water heater about the position of piping, and form.
Display window
USE NON-CORROSIVE MATERIALS
DO NOT REDUCE TO LESS THAN 1/2"
KEEP AS SHORT AS POSSIBLE
1/2" PVC pipe
DO NOT INSERT
THE END OF
DRAIN PIPE INTO
THE FLOOR DRAIN.
* MAINTAIN CLEARANCE
The end of the drain pipe must
have an air gap. 1" or more.
Condensate piping with pump
DO NOT ADD
ANY VALVES
Slope pipe downwards
1/4" per foot. or more.
The end of the drain pipe must
have an air gap. 1" or more.
Display window
USE NON-CORROSIVE MATERIALS
DO NOT REDUCE TO LESS THAN 1/2"
KEEP AS SHORT AS POSSIBLE
1/2" PVC pipe
3/8" ID tubing*
Condensate pump
* Install tubing according to pump
manufacturer's instructions.