Installation & Servicing Instructions Rinnai E-Series
23
6.5
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
fi ttings. The cold water inlet on the Combi boilers must be equipped with the following
components (counted in the water fl ow direction):
Flow restrictor (supplied), pressure relief valve, Expansion vessel 87 PSI / 6bar
(potable water, blue).
The 3/4" NPT adapter fi tting with fl ow reducing valve must be fi tted in the cold water
connection.
A fl ow restrictor is supplied with the boiler in a 3/4"NPT adapter fi tting. The quantity
of water is virtually unaff ected 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 fl ow restrictor.
6.5.1
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.
Maximum Level
Total Hardness
Up to 200 mg / L
Aluminium *
Up to 0.2 mg / L
Chlorides *
Up to 250 mg / L
Copper *
Up to 1.0 mg / L
Iron *
Up to 0.3 mg / L
Manganese *
Up to 0.05 mg / L
pH *
6.5 to 8.5
TDS (Total Dissolved Solids) *
Up to 500 mg / L
Zinc *
Up to 5 mg / L
* 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.
6.5.2
Domestic water treatment Accessory
Rinnai off ers 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.
NOTICE
i
!
DANGER
Identi
fi
cation colors
fl
ow
restrictor:
E50CR: Brown
E75CR: Brown
E110CR: Green
NOTICE
i
