CB
Built Like A Tank With Laser Precision
Page
14
of 24
A dedicated 15amp, 115vac circuit needs to be installed to power the GFCI. Land power &
neutral wires to the back of the GFCI and wire nut the ground wire to the green wire that is
fastened alongside the ground of the GFCI. See page 10 for a diagram. The size and type of
electric wire to be installed depends on the distance from the boiler to the house. If the boiler is
less then 100 feet from the house, #14 AWG UF cable is the smallest wire that may be used. If
the distance is greater than 100 feet, #12 AWG UF cable must be used. A maximum of 5 amps
is used by the boiler if all standard equipment is running and dual 100watt light bulbs are used.
The extra outlets will provide a total of 10amps for convenience use.
E. Installation of Pex Pipe
Keep the pex pipe underground as it enters the house. Make sure to seal around the pipe to
prevent water from entering structure. This can be done with a can of expanding foam. If
conditions require the pipe to be above ground for entering the home, make sure to insulate
thoroughly.
CALL YOUR LOCAL MISS DIG HOTLINE BEFORE YOU DIG TRENCHES!
F. Filling Boiler with Water
Do not start circulation pump until it has been primed!
Being a wet-rotor unit, if the pump
runs dry at all, it will seize up as the bearings rely on lubrication from the water. Once all piping
connections are complete, pour the Nature’s Comfort boiler treatment in, fill the boiler with a
hose through the float stack or if you have installed a fill line, open the valve and allow it to fill
until the float starts to rise. Use water that is softened or has low iron content if possible.
Loosen the top screw on the pump until a steady stream of water flows and all air has been
purged.
During the first heating cycle the water might expand and overflow. This is normal and
will occur anytime too much water has been added. After priming and starting the circulation
pump and bleeding the heat exchanger let your boiler heat up and run for 24 hours then top off
the water again. The ideal water level is at the end of a heating cycle for the level indicator to
be at the top of the rubber cap. The water level will rise and fall during operation as water
expands and contracts with temperature changes. Be sure to keep your boiler within 3” of
being full at all times including through the summer as this will keep your boiler free from
corrosion and when in use, from overheating causing circulation pump failure.
G. Plumbing Parts Needed
1. A 1” pex crimp x 1” NPT is needed to install the outgoing pex line into the flange that is
supplied and already mounted to the lower end of the circulation pump. The flange is a female
1" NPT. The return line must be installed in the opposite lower corner for cross flow of the
water jacket so no hot spots are created on the firebox.
2. Extra pex fittings can be purchased from your local hardware or plumber.
The pex pipe connected to the bottom of the pump runs to the house and normally runs to the
heat exchanger installed in your furnace or a plate heat exchanger for a hydronic radiant
system. See page 20 for more information on hooking up a brazed-plate heat exchanger.