Install Instructions

Installation & Servicing Instructions Rinnai Q-Series
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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 regulator valve (supplied),
Safety group, Expansion vessel 87 PSI / 6bar (potable water, blue).
A fl ow regulator valve is supplied with the boiler. The fl ow regulator valve ensures that
a quantity of water is supplied which has a outlet temperature of 120°F (assuming a
cold water temperature of 45°F). The quantity of water is virtually unaffected by the
water pressure. The 3/4" NPT adapter fi tting with the fl ow reducing valve must be
fi tted in the cold water connection (see Dimensions 5.3, cold water pipe -k).
When there is a water pressure lower than 22PSI / 1.5 bar it is advisable to
remove the inside mechanism of the fl ow reducing valve. Contact Rinnai for
removal instructions.
NOTICE
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DANGER
Hot water can be dangerous, especially for infants or children, the elderly,
or infirm. There is hot water scald potential if the thermostat is set too high.
Water temperatures over 125º F (51º C) can cause severe burns or
scalding resulting in death.
Hot water can cause first degree burns with exposure for as little as:
3 seconds at 140º F (60º C)
20 seconds at 130º F (54º C)
8 minutes at 120º F (48º C)
Test the temperature of the water before placing a child in the bath or
shower.
Do not leave a child or an infirm person in the bath unsupervised.
DANGER
6.5.1 Domestic Water quality
Appropriate steps must be taken to ensure the indirect tank water heater does not
become plugged by scale caused by hard water or sediment. If the indirect tank water
heater becomes plugged by either scaling from hard water or sediment it is not the
responsibility of Rinnai.
1. Water hardness for DHW
When there is a water hardness of more than 6 to 7 grains hardness for domestic
water, a water softener must be installed on the inlet side of the DHW connection.
2. Sediment in DHW
If there is sediment in your domestic water supply a sediment fi lter or other suitable
device should be used to remove it before the water enters the indirect tank water
heater.
3. Water Chemistry for DHW
The water used for domestic must have a water pH between 6.0 and 8.0, contain less
than 1.7 gpg (20 mg/l) of Sodium, and a concentration of Chlorine less than 5.8 gpg
(100 mg/L).
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 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.
fl ow regulator valve fi gure 13
NOTICE
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