Supply And Return Lines; Temporary Above Ground Of Winter Installations; Digging The Trench - Central Boiler Pallet Burner Dual Fuel Owner's Manual

3. Drill a 1/4" hole in the brace; then secure the ground
terminal with a cap screw (1/4" x 20" x 3/4"), star
washer and nut. Secure the ground wire to the
terminal; then secure the ground wire to the ground
rod with the clamp. Tighten all hardware securely.
Fig. 5

SUPPLY AND RETURN LINES

Determine the configuration of the supply and return
lines from the outdoor furnace to where the supply and
return lines will connect to the existing heating system.
Central Boiler recommends using the ThermoPEX
piping system.
ThermoPEX is a fully assembled, pre-insulated
piping system consisting of two 1" Central PEX lines
or two 1-1/4" PEX lines. The two lines (one a supply
and one a return line) are insulated with high-density
urethane insulation and a thick, durable, waterproof,
polyethylene outer jacket. One of the lines is marked
with a black stripe for identification.
NOTE: To prevent ground water from entering
the building, do not use drain tile, PVC pipe with
bubble wrap, or any other inferior material for
insulating the water lines.
NOTE: If the outdoor furnace supply and return
lines are not insulated properly, or if other
brands of insulated piping are used, there can be
excessive heat loss. This heat loss can greatly
increase the fuel consumption.
NOTE: If it is unavoidable that the trench will run
through an area of ponding water, use ThermoPEX
instead of other materials. ThermoPEX should
also be used for above-ground or winter
installations, and if the area is likely to be affected
by compaction.
10
Temporary Above Ground or Winter
Installations
For temporary above ground or winter installations in
which the supply and return lines can not immediately be
buried underground, Central Boiler recommends using
ThermoPEX. Be sure that both the insulation and the
supply and return lines will not be exposed to ultraviolet
rays. The ThermoPEX black exterior jacket has UV
protection but the insulation and water lines inside do
not. Use a ThermoPEX termination cap at each end of
the installation to protect and seal the insulation from
water.
NOTE: Bury the ThermoPEX as soon as conditions
permit (e.g., once the ground has thawed).
NOTE: If ThermoPEX is installed temporarily
above ground, provisions should be made to
prevent possible risk of fire coming into contact
with the ThermoPEX. ThermoPEX is constructed
of materials that can burn and transfer a fire.
If ThermoPEX is installed temporarily above
ground, do not cover with combustible materials
(e.g., stray, hay, leaves, etc.).

Digging the Trench

®
Before digging, be sure to call for utility locator
service.
The trench depth for ThermoPEX should be between
10" and 28" (25 and 71 cm).
Fig. 6
CAUTION
WARNING
Section 1 - Furnace Installation