Programming Domestic Hot Water Preheat; Condensate Drain Pipe - Rinnai E75CN Installation & Servicing Instructions Manual

6.6 Condensate drain pipe

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NOTICE
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NOTICE
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NOTICE
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NOTICE
This selection can be done with the fi rst digit of Parameter 36.
Domestic hot water preheat ON
Domestic hot water preheat OFF
See chapter 10 how to change a parameter.
The domestic hot water preheat setting is designed to increase the comfort of the
home owner and reduce water consumption by reducing the wait time for hot water
at the fi xture. This comfort setting will create a slight increase in the gas usage of the
boiler, but this will be offset by the reduction in wasted water at the fi xture.
This boiler produces condensate. Condensate must be drained otherwise the boiler
will not function and can cause product or property damage.
The condensation drain pipe should be connected to a drain in the building by means
of an open connection. By this means the possibility of drain gases effecting the boiler
is prevented. The drain connection should have a minimum diameter of 1.3" / 32mm.
Install the condensation drain pipe according to applicable local code.
If the condensate outlet of the boiler is lower than the public sewage system a
condensate pump must be used.
The condensate produced by the boiler has a pH value between 3 and 4.
Install a neutralization unit if required by local code. It is recommended, but not
required to install a condensate neutralizer. Rinnai offers a condensate neutralizer
designed to work with all boiler models. The condensate neutralizer kit comes with
all the necessary fi ttings and mounting material. PVC pipe must be supplied by the
installation contractor.
Rinnai part number: 804000074
Do not drain the condensation water to the external rain gutter because of the
danger of freezing and blockage of the drain.
Before putting the boiler into operation fi ll the condensate trap with 1.27 cups /
300 ml of water. If the boiler will be installed in a high temperature installation
such as baseboard with a supply temperature of 160°F or above, fi ll the
condensate trap with mineral oil instead of water.
Use materials approved by the authority having jurisdiction. In absence of such
authority, PVC and CPVC pipe must comply with ASTM D1785, F441 or D2665.
Cement and primer must comply with ASTM D2564 or F493.
For Canada, use CSA or ULC certifi ed PVC or CPVC pipe, fi ttings and cement.
Periodic cleaning of the condensate disposal system must be carried out. See
the Rinnai Boiler Application Manual for further information and for a piping
diagram for the condensate.
= 1x (Factory setting)
= 2x
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