Underground Electric Wire; Connecting To Existing Heating System - Central Boiler Pallet Burner Dual Fuel Owner's Manual

Underground Electric Wire

A 14-2 (two wires plus ground) underground rated wire
should supply the outdoor furnace with electricity. A
heavier gauge wire may be needed if the run is over 200
feet (61 meters). Check local codes and requirements.
It is recommended that the incoming fuse or circuit
breaker not exceed 15 amps.

Connecting to Existing Heating System

1. Make an entrance into the building(s) where the
supply and return lines are to enter.
2. Lay the ThermoPEX assembly in the trench and
feed one end into the building. Apply sealant around
the supply and return lines where they enter the
building.
3. Purge the supply and return lines before connecting
any fittings to ensure there is no debris or foreign
matter present.
NOTE: All holes made in basement or building
walls must be sealed completely to prevent water
from entering the building.
4. Close all valves on the outdoor furnace.
5. Install fittings to allow pressure-testing of both
supply and return lines. Pressurize with 50 psi (3.5
kg/cm ) of air; then check after 30 minutes to see if
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pressure has dropped. A drop in pressure indicates a
leak; repair as necessary.
6. Connect the supply and return lines to the outdoor
furnace and the existing heat emitter(s). Fig. 7 shows
some of the PEX fittings and tools used in making
connections.
Section 1 - Furnace Installation
Fig. 7
CAUTION
Allow for expansion and contraction of the
supply and return lines at each end. Without
an allowance for expansion and contraction,
the lines may kink or the fittings may be pulled
apart, causing an immediate water loss from the
outdoor furnace. Central PEX water lines can
have an expansion and contraction rate up to
.095" per each 100 ft and each 10°F (2.4 mm/30
m/5.5˚C).
7. Make sure there are no leaks in the supply and return
lines; then backfill the trench.
NOTE: Do not backfill the trench until the supply
and return lines have been tested to ensure there
are no leaks.
8. Install the base trim; then, using gravel or small
rock, backfill the perimeter of the ThermoPEX line
enclosure to the bottom, inner edge of the base (Fig.
8). Install the siding panel.
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