Dunkirk H2OI Single Coil Stainless Steel Indirect Water Heaters - Manual (Page 15)

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IV. 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.
3. Refer to schematics for separate circulator wiring.
Refer to schematics for zone valve wiring.
Reference should be made to the Installation Manual for the boiler as well.
V. 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.
WARNING
This water heater can deliver scalding temperature water at any faucet in the system. Be careful when
using hot water to avoid scalding injury. By setting the thermostat on this water heater to obtain an
increased water temperature, you create the potential for scald injury. To protect against injury, you
should install an ASSE approved mixing valve ( a device to limit the temperature of water to protect
against scald injury via mixing hot and cold water supply) in the water system. This valve will reduce
point of discharge temperature in branch supply lines. Such valves are available from a local plumbing
supplier. Please consult with a plumbing professional.