Determine Installation Location; Water Quality - Rinnai RL75i Installation And Operation Manual

Determine Installation Location

You must ensure that clearances will be met and that
the vent length will be within required limits.
Consider the installation environment, water quality,
and need for freeze protection. Requirements for the
gas line, water lines, electrical connection, and
condensate disposal can be found in their respective
installation sections of this manual.

Water Quality

Consideration of care for your water heater should
include evaluation of water quality.
Water that contains chemicals exceeding the levels
below affect and damage the heat exchanger.
Replacement of the heat exchanger due to water
quality damage is not covered by the warranty.
Total Hardness
Aluminum *
Chlorides *
Copper *
Iron *
Manganese *
pH *
TDS (Total Dissolved Solids) *
Zinc *
* Source: Part 143 National Secondary Drinking Water
Regulations
If you install this water heater in an area that is
known to have hard water or that causes scale build-
up the water must be treated and/or the heat
exchanger flushed regularly.
When scale build-up in the heat exchanger begins to
affect the performance of the water heater, a
diagnostic code "LC#" will display. Flush the heat
exchanger to prevent damage to it. Scale build up is
caused by hard water set at a high temperature.
Rinnai provides a "Scale Control System" that offers
superior lime scale prevention and corrosion control
by feeding a blend of control compounds into the
cold water supply.
103000022 103000023
Installed on cold Whole home or Light
water line supplying Commercial supply-
1 tankless water ing 1 tankless water
heater only heater
Refill 103000025 Refill 103000026
6
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
103000024
Whole home supply-
ing 2 tankless water
heaters or 1 tankless
in Light Commercial
Refill 103000026
VC Series Manual
Environment
Air surrounding the water heater, venting, and vent
termination(s) is used for combustion and must be
free of any compounds that cause corrosion of
internal components. These include corrosive
compounds that are found in aerosol sprays,
detergents, bleaches, cleaning solvents, oil based
paints/ varnishes, and refrigerants. The air in beauty
shops, dry cleaning stores, photo processing labs, and
storage areas for pool supplies often contains these
compounds. Therefore it is recommended that
outdoor models be used for these locations where
possible.
The water heater, venting, and vent termination(s)
should not be installed in any areas where the air may
contain these corrosive compounds. If it is necessary
for a water heater to be located in areas which may
contain corrosive compounds, the following
instructions are strongly recommended.
IMPORTANT CONSIDERATIONS FOR:
Indoor/Internal Water Heaters

DO NOT Install in areas where air for combustion
can be contaminated with chemicals.

Before installation, consider where air has the
ability to travel within the building to the water
heater.

Where possible, install the water heater in a
sealed closet so that it is protected from the
potential of contaminated indoor air.

Chemicals that are corrosive in nature should not
be stored or used near the water heater.
Outdoor/External Water Heaters and Vent
Terminations of Indoor/Internal Water Heaters

Install the water heater as far away as possible
from exhaust vent hoods.

Install as far away as possible from air inlet
vents. Corrosive fumes may be released through
these vents when air is not being brought in
through them.

Chemicals that are corrosive in nature should not
be stored or used near the water heater or vent
termination.
Damage and repair due to corrosive compounds in
the air is not covered by warranty.