Hot Water Supply; Domestic Water Quality; Domestic Water Treatment Accessory - Rinnai E75CRN Installation & Servicing Instructions Manual

6.5
!
DANGER
Identification colors flow
restrictor:
E50CR: Brown
E75CR: Brown
E110CR: Green
i
NOTICE
6.5.1
i
NOTICE
6.5.2

Hot water supply

Connection of the drinking water installation should be performed according to the
national secondary drinking water regulations.
Do NOT use toxic chemicals, such as those used for boiler treatment in potable
water heating systems used for space heating.
The sanitary water pipes can be connected to the installation by use of adapter
fittings. The cold water inlet on the Combi boilers must be equipped with the following
components (counted in the water flow direction):
Flow restrictor (supplied), pressure relief valve, Expansion vessel 87 PSI / 6bar
(potable water, blue).
The 3/4" NPT adapter fitting with flow reducing valve must be fitted in the cold water
connection.
A flow restrictor is supplied with the boiler in a 3/4"NPT adapter fitting. The quantity
of water is virtually unaffected by the water pressure.
When there is a water pressure lower than 22PSI / 1.5 bar it is advisable to
remove the inside mechanism of the flow restrictor.

Domestic Water quality

Appropriate steps must be taken to ensure the brazed plate heat exchanger does
not become plugged by scale caused by hard water or sediment. If the plate heat
exchanger becomes plugged by either scaling from hard water or sediment it is not
the responsibility of Rinnai.
Total Hardness
Aluminum *
Chlorides *
Copper *
Iron *
Manganese *
pH *
TDS (Total Dissolved Solids) *
Zinc *
* Source: Part 143 National Secondary Drinking Water Regulations
If problems occur when using sanitary water outside of the above stated
requirements, no recourse can be made to the terms of the limited warranty.

Domestic water treatment Accessory

Rinnai offers a domestic water treatment device that can help reduce scale build up.
This device can be installed on the incoming cold water line for any combi boiler. For
additional information on contact Rinnai.
Maximum Level
Up to 200 mg / L
Up to 0.2 mg / L
Up to 250 mg / L
Up to 1.0 mg / L
Up to 0.3 mg / L
Up to 0.05 mg / L
6.5 to 8.5
Up to 500 mg / L
Up to 5 mg / L
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