Installation and Operating Instructions
NCB
Built Like A Tank With Laser Precision
Page
14
of 29
D. Water Lines and Their Functions.
1. Run a 1” pex water supply line from
nipple on bottom
of the boiler to the
water-to-
water heat exchanger
installed on the water heater.
2. Run a 1” pex water line from the
water-to-water heat exchanger
on hot water
heater to the
heater exchanger
which is installed in the existing heating system.
3. Run a 1” pex water return line the
heat exchanger
which is placed into the existing
heating system to the
pump
at the top of the boiler.
Note: All pipe should be at least 1”. They should be 1-1/4” if the distance is greater
than 100 feet.
HINT:
Label the water lines or connect them before back filling over pipe and lines
E. Electric Lines
.
The size and type electric lines you install depends on distance the boiler is located from
the house and whether you choose to have the water pump on the boiler run continually or
only when the existing furnace fan runs. It is recommended that the water pump run
continually when the distance from the boiler to the house is greater than 50 feet and/or
boiler is used to heat your hot water.
1. If your boiler is less then 100 feet from your house, you may use #14 wire. If it is
greater than 100 feet, you should use #12 wire. You may certainly use #12 for the
shorter distance if you like.
2. You may use #14-2 w/ground UF Romex (under ground) wire if you choose to have the
boiler pump run continually, You will need #14-3 w/ground UF Romex wire if you want
to run the water pump only when the furnace fan runs. You, of course, would need
#12-2 or #12-3 if your boiler is greater than 100 feet from the house.
Note:
The electric line and thermostat wires can be pulled through the 4” insulated flexible
pipe which contains the two lines Pex pipe.
If more than one location is to be heated, a second 4” watertight pipe will need to be
installed underground for the water lines, thermostat wire and power wire of the second
location. If the 2
nd
location has a furnace, you wire it as the first and no thermostat wire is
needed. Locate this pipe at the opposite side of the outdoor boiler, unless it’s running in
the same direction as the first. In that case both pipes can be on the left.
