Heating Multiple Zones - Central Boiler e-Classic 1450 IR Owner's Manual

HEATING MULTIPLE ZONES

Fig. 23
A single pump and manifold may be used to heat
more than one zone as long as the return water can be
maintained above 150°F (66˚C). If the return water
temperature can not be maintained above 150°F (66˚C),
then a separate pump should be used for each zone. A
thermostatic valve (see Fig. 16) must be installed to
ensure that the water temperature in the outdoor furnace
is maintained above 150˚F (66˚C).
The E-Classic offers two sets of supply and return ports
(for up to two zones or buildings, without the need for
manifolds) for mounting of up to two pumps on the
outdoor furnace.
NOTE: Pump(s) may be installed on the outdoor
furnace or inside the building.
NOTE: If a Taco 014 pump is used, the pump
should be mounted at the base of the outdoor
furnace and a 1-1/4" supply line to the pump
should be used to ensure adequate supply
feed to the pump. See the Hydronic Component
Selection Guide (p/n 2482) for more detailed
information.
NOTE: If the outdoor furnace is unable to maintain
a water temperature of 150˚F (66˚C) or higher,
inspect the thermostatic valve and replace if
necessary.
NOTE: A properly-sized backup furnace or boiler
should be configured to provide heat if the
outdoor furnace is out of wood or the heat load
exceeds the capacity of the outdoor furnace.
Section 1 - Outdoor Furnace Installation
21