Noritz WHiC56 Service Manual page 53

■ Condensate Piping
Due to the acidic nature of the condensate, be sure to properly drain and if necessary, treat the condensate
prior to disposal. Damage caused by improperly handled condensate is not covered by the warranty.
• This water heater is a high effi ciency, fully condensing appliance which produces acidic condensate
during operation. The water heater incorporates a collection and removal system which must be
properly drained in order to ensure proper operation of this appliance.
• The pH level of the condensate is approximately 2-3. It should be drained as required by local code or
when the condensate could cause damage.
• In order to drain the condensate, a 1/2" threaded fi tting is provided at the base of the water heater.
Do not reduce the size of this fi tting or the drain piping to less than 1/2".
In cold climates, do not drain the condensate to the outdoors. If the drain pipe freezes during cold
weather, the pipe will not drain condensate and the unit will stop operating.
• Use plastic pipe with acid resistance, 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 acidic condensate.
• 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 100ml/minutes from the water heater.
• Horizontal runs must be sloped 1/50 downwards the drain or condensate pump. The condensate will
be discharged by gravity force only. Make the drain pipe run as short as possible.
• The end of the drain pipe must not be submerged in water or blocked in any way. To ensure proper
drainage, leave the end of the drain pipe open to the atmosphere. Do not have a trap. Also, make sure
that there are no obstructions blocking the drain line from discharging condensate.
• Be sure to check that condensate is freely fl owing from the drain piping after the system has been installed.
Condensate will begin fl owing 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 heaters, etc.).
Water heater
Drain connecting
supply
Heat insulation
material
Drain pipe
CAUTION
Do not pitch the drain line up
once a horizontal section has
been introduced.Always pitch
the drain line down to ensure
proper drainage.
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Drain pipe