Water Supply Lines And Insulation; General Information - Central Boiler CLASSIC Owner's Manual

Access to the hot and cold outlets is gained by opening
the control panel on the right-hand side of the furnace. The
upper outlets are the hot (supply) outlets and the lower
outlets are the cold (return) outlets. This allows for the
mounting of the circulation pumps on the furnace. If desired,
the circulation pumps may also be installed in the building
being heated. Figures 9 & 10 illustrate proper water line
and pump installations.
Fig. 10
Section 3 - Furnace Installation
Fig. 9

WATER SUPPLY LINES AND INSULATION

General Information

The water lines to be used are 1-inch (1 ¼ -inch on large
heat loads) Central PEX crosslink polyethylene lines (rated
for 100 PSI at 180° F). Central Therm foam pipe insulation
(p/n 241 or 242) should be used to insulate the lines (see
Fig. 11) and they should be covered with Central Therm
Sleeve. Installation of the water lines and insulation into a
continuous length of Central Therm Sleeve will greatly
reduce heat loss caused by ground water contact. Also, use
of Central Therm Sleeve for temporary above ground
applications (4-6 months) will reduce the effects of
ultraviolet rays on the water lines and insulation.
Central Boiler now offers a convenient alternative to
ordering and assembling Central PEX tubing, Central Therm
insulation, and Central Therm Sleeve. CentralFlex™ is a
preassembled set of two 1 in. PEX tubes surounded by
insulation and encased in a waterproof corrugated jacket. It
is available in 100 and 500 foot lengths.
The water lines should be buried in a trench
approximately 12 inches deep. The water lines should not
be buried in low lying areas with standing water. Historically,
lines buried deep (3 to 4 feet) have been known to have a
greater number of problems especially when ground water
contacts the water lines causing an excessive heat loss and
greatly increasing the amount of wood consumption. An
exception to the previously stated depth of the lines is
necessary if the lines run across an area of heavy vehicle
traffic. In above ground applications where the lines will
not be buried in a trench, the lines and insulation should be
covered as exposure to ultraviolet rays will cause
deterioration of the water lines and insulation.
Section
3
11