Dunkirk H2OST Stainless Steel Storage Tanks - Manual (Page 7)

7
Hot Water Can Scald!
Water heated to temperature for clothes washing, dish washing and other sanitizing
needs can scald and cause permanent injury.
Children, elderly, and infirm or physically handicapped persons are more likely to be
permanently injured by hot water. Never leave them unattended in bathtub or shower.
Never allow small children to use a hot water tap or draw their own bath.
• If anyone using hot water in the building fits the above description, or if state laws
or local codes require certain water temperatures at hot water taps, you must take
special precautions:
• Use lowest possible temperature setting.
• Install some type of tempering device, such as an automatic mixing valve, at
hot water tap or water heater. Automatic mixing valve must be selected and installed
according to manufacturer's recommendations and instructions.
Water passing out of drain valves may be extremely hot. To avoid injury:
• Make sure all connections are tight.
• Direct water flow away from any person.
III. Electrical
1.
Install electric wiring and grounding in accordance with the National Electrical code and local regulations.
2. All water heaters are supplied with a thermostat.
IV. Operation
Startup
After the water heater has been plumbed and wired, and the boiler water piping is purged of air, the water heater is ready
to be started.
1. Follow the boiler installation instructions to place the boiler in operation.
2. The tank thermostat is factory pre-set to 125 degrees F and will call for heat if the water in the tank is lower than
125.
3. On a call for heat, the tank thermostat contacts close to start the water heater zone circulator and the boiler.
4. After the tank has reached the temperature setting, the tank thermostat opens and de-energizes the circulator and
the boiler. If there is a call for space heating, the boiler will continue to run until the room thermostats are satisfied.
Temperature Adjustment
The tank thermostat controls the maximum water temperature in the water heater. If it is set too high, the resulting hot
water can cause painful scalding with possible serious and permanent injury. The temperature at which this occurs varies
with a person’s age, and the length of time in contact with the hot water. The slower response time of infants, older, or
handicapped people increase the hazard for them.
It is recommended that the thermostat be set for the lowest possible temperature that satisfies your needs. This will also
provide you with the lowest energy consumption and cost.
Check the water temperature at a hot water faucet soon after the tank thermostat has satisfied, and the circulator and the
boiler have turned off. Adjust as needed.
Lowering the thermostat setting will not have an immediate effect on the water temperature because the stored water
will have to be used and the thermostat must go through the cycle of heating cold water and satisfying at the new, lower
temperature. Additional temperature checks should follow the completion of a heating cycle. Further adjustments may be
required after you have used the water heater
Studies have indicated that dangerous bacteria including legionella
pneumophila can form in potable water distribution system if certain
minimum water temperatures are not maintained. Contact your local health department for
more information.