5
TNR-I&S-02
from thermal expansion such as pressure bulges and/or deformities.Your
water supplier or local plumbing inspector should be contacted on how
to control this situation.
3. After installation of the water lines, open the main water supply valve
and fill the water heater. While the water heater is filling, open
several hot water faucets to allow air to escape from the water system.
When a steady stream of water flows through the faucets, close them
and check all water connections for possible leaks.
4. Never operate the water heater without first being certain it is filled
with water.
SCALDING
This water heater can deliver scalding temperature water at any faucet in
the system. Be careful whenever using hot water to avoid scalding injury.
Certain appliances such as dishwashers and automatic clothes washers
may require increased temperature water. By setting the thermostat on
this water heater to obtain the increased temperature water required by
these appliances, you may create the potential for scald injury. To protect
against injury, you should install ASSE approved mixing valve in the water
system. This valve will reduce point of discharge temperature by mixing
cold and hot water in branch supply lines. Such valves are available from
the local plumbing supplier.
The following chart details the relationship of water temperature and time
with regard to scald injuy and may be used as a guide in determining the
safest water temperature for your applications.
ALTERNATE SPACE HEATING WATER CONNECTIONS
Connect the system supply and return piping to the water heater.
Refer to Figure 8 and Figure 9 for installation examples. Maintain a
minimum ½” clearance from hot water piping to combustible materials.
DANGER
Toxic chemical, such as those used for boiler treatment, shall not be
introduced into potable water used for space heating.
This water heater shall not be connected to an existing heating
system or component(s) previously used with a non-potable water
heating appliance.
All piping components connected to this water heater for space
heating applications must be suitable for use with potable water.
WARNING
When the system requires water for space heating at temperatures
higher than required for other means, a tempering valve shall be
installed to temper the water for those uses in order to reduce the
scald hazard potential.
Failure to properly pipe this water heater may result in improper
operation and damage to the water heater or structure.
Oxygen contamination of this water heater will cause corrosion of iron
and steel components, and can lead to water heater failure.
Table 1
Approximate Time/Temperature Scald Chart
APPROXIMATE TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120° F
More than 5 minutes
125° F
1½ to 2 minutes
130° F
About 30 seconds
135° F
About 10 seconds
140° F
Less than 5 seconds
145° F
Less than 3 seconds
150° F
About 1½ seconds
155° F
About 1 second
Figure 7 Scald Warning
Figure 8
Alternate Space Heating Connections
