Installing - Central Boiler CLASSIC Owner's Manual

Installing

NOTE: If installing CentralFlex™, the tubing,
insulation, and sleeve assembly instructions in this
section may be ignored.
Prior to installing the water lines in the insulation,
mark both ends of the hot line so that the hot water line
can be identified for correct installation. The hot fitting
on the furnace takes the water from near the top of the water
jacket and the return is lower on the water jacket. It is very
important to keep the water lines properly identified.
When installing the water lines, an installation allowance
for expansion and contraction of the lines must be made. If
the water lines are mounted solid to the furnace or inside
the building, the lines may kink or the fittings may be pulled
apart causing an immediate water loss from the furnace.
Central PEX water lines can have an expansion/contraction
rate up to 0.95 in./100ft/10°F.
A 14-2 underground rated wire (2 wires plus ground)
may be buried in the same trench to supply the furnace with
electricity. A larger wire diameter may be needed if the run
is over 200 feet. When installing the electrical supply for
the furnace, it is recommended that the incoming fuse or
circuit breaker not exceed 15 amps. The furnace must be
electrically bonded to ground in accordance with the
requirements of the authority having jurisdiction or, in
absence of such requirements, with the National Electrical
Code, ANSI/NFPA 70 and/or the Canadian Electrical Code
Part 1, CSA C22.1 Electrical Code.
NOTE: If unavoidable that the trench is to be run
through an area of ponding water, the installer
must make certain that water will not enter the
installation enclosure. One option is to encase the
water lines, insulation, and sleeve in corrugated
flexible tubing and digging the trench with a slight
slope to one direction or the other (preferably away
from the building) to allow drainage of any water
that may enter the tube.
1. Remove the siding panel and base trim below the
control panel. Dig a trench 12 inches deep between
the furnace and building(s) to be heated; then make
an entrance for the lines into the building(s).
WARNING
Before trenching, be sure to call for locator service.
2. Mark both ends of the hot water line; then install both
water lines in the Central Therm foam pipe insulation
using the following procedure:
A. Using a large mitre box and a fine tooth saw, trim
both ends of each insulation section.
NOTE: The insulation sections must be trimmed
square so they can be glued together during the
installation process.
B. To make inserting the water lines easier in the
insulation, insert a rod into the end of each water
line; then securely tape the rods to the water lines.
14
NOTE: The rods should be long enough to be
inserted into the insulation section and grabbed
from the other end.
C. For each insulation section, slide the rods into the
insulation section; then pull the water line through
the insulation. Continue until the water lines have
been threaded into all insulation sections.
D. Using contact cement, glue the ends of the
insulation sections together; then using tile tape,
tape the perimeter of each seam.
E. Measure the length of Central Therm Sleeve
necessary to run the entire length of the installation,
add two additional feet (minimum), and cut. Slide
the sleeve over the insulation; then wrap each end
and secure with duct tape. Waterproof each end
with silicone or other waterproofing agent.
3. Lay the supply lines into the trench and feed one end
into the building. Apply sealant around the lines
where they enter the building. Do not backfill the
trench until the water lines have been tested to ensure
there are no leaks.
NOTE: All holes made in basement or building
walls are to be completely sealed to prevent water
from entering the building.
4. Connect the water lines to the furnace and building
allowing for expansion and contraction of the lines
at each end.
5. Install the base trim; then using sand or fine dirt, back
fill the perimeter of the water line enclosure to the
top, inner edge of the base. Install the siding panel.
Fig. 18
Fig. 18a
Section 3 - Furnace Installation