A.O. Smith Cirrex SUN-80 Instruction Manual page 9

HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to
a temperature which will satisfy space heating, clothes washing,
dish washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more likely to
be permanently injured by hot water than others. These include the
elderly, children, the infirm, or physically/mentally disabled. If anyone
using hot water in your home fits into one of these groups or if there is
a local code or state law requiring a certain temperature water at the
hot water tap, then you must take special precautions. In addition to
using the lowest possible temperature setting that satisfies your hot
water needs, a means such as a mixing valve should be used at the
hot water taps used by these people or at the water heater. Valves
for reducing point of use temperature by mixing cold and hot water
are also available.
Consult a Qualified Installer or Service Agency. Follow
manufacturer's instructions for installation of the valves.
Before changing the factory setting on the thermostat, read the
"Temperature Regulation" section in this manual.
This water heater shall not be connected to any heating systems
or component(s) used with a non-potable water heating appliance.
Use properly sized water heaters for spa or hot tub use.
Toxic chemicals, such as those used for boiler treatment shall not
be introduced into this system.
As water is heated, it expands (thermal expansion). In a closed
system, the volume of water will grow. As the volume of water
grows, there will be a corresponding increase in water pressure
due to thermal expansion. Thermal expansion can cause premature
tank failure (leakage). This type of failure is not covered under the
limited warranty. Thermal expansion can also cause intermittent
temperature-pressure relief valve operation: water discharged from
the valve due to excessive pressure build up. The temperature-
pressure relief valve is not intended for the constant relief of thermal
expansion. This condition is not covered under the limited warranty
A properly-sized thermal expansion tank should be installed on all
closed systems to control the harmful effects of thermal expansion.
Thermal expansion tanks are available through a local plumbing
contractor. Contact the local plumbing inspector, water supplier
and/or service agency for assistance in controlling these situations.
This water heater is design certified to be used with a potable
water system. When connecting water piping with solder joints
use only lead free solder.
WARNING: This solar water heater shall not be connected to any
heating systems or component(s) previously used with a non-
potable water heating appliance.
If this solar water heater is also used for space heating applications,
all piping and components connected to the solar water heater
shall be suitable for use with potable water.
This water heater has been design certified as a solar water heater
complying with Standards for Safety - UL 174/CAN/CSA C-22.2.
The particular application of this water heater described (above
paragraph) may be subject to review and approval by local code
officials.
WARNING: Toxic chemicals such as used for treatment of boilers
or non-potable water heating appliances shall never be introduced
into a potable water space heating system.
The solar water heater will work better if you keep the hot water
runs short. You will also get hot water faster and with less heat loss.
The illustration shows the correct valves and fittings that you
will need to install the solar water heater. Threaded (3/4") water
connections are supplied through the tank top.
1. Purchase the fittings that you need to connect the pipes.
Remember that you have to connect both the hot and cold
water pipes.
2. Apply a light covering of pipe joint compound to each outside
thread before making connection.
3. Connect the cold water supply pipe to the cold water inlet of
your solar water heater as follows:
a. Look at the top cover of the solar water heater. The hot
and cold connections are marked there.
b. A non-metallic dip tube is supplied to carry cold water from
the tank top to the bottom. Be sure that it is in the cold water
inlet.
c. If using copper tubing, solder tubing to an adapter
BEFORE you attach the adapter to the cold water inlet.
DO NOT solder the cold water supply pipe directly to
the cold water inlet connection. It might harm the dip tube.
d. The cold water supply line must have a shut-off valve and union.
4. Use a union to connect the hot water supply pipe to the solar
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Figure 4.
Figure 5.