Thermostatic Valves - Central Boiler CL 4030 Owner's Manual

Thermostatic Valves

NOTE: A 3/4" thermostatic valve with installation
instructions is included with each new Classic
and must be installed on each set of supply and
return lines or warranty can be voided.
NOTE: For additional thermostatic valves, or
for 1-1/4" thermostatic valves, contact your
authorized Central Boiler dealer.
NOTE: The thermostatic
throughout the manual may vary from your
installation. See the installation instructions
provided with the thermostatic valve.
A thermostatic valve must be installed on each set
of supply and return lines in the system to maintain
the outdoor furnace water temperature above 150˚F
(65˚C). Operating the outdoor furnace with the water
temperature less than 150˚F (65˚C) may result in more
condensation in the firebox that can lead to corrosion.
Section 1 - Furnace Installation
NOTE: The thermostatic valve must be installed
in the building to be heated.
NOTE: If the system inside the building contains
additional pumps, there must be a bypass in the
system that allows circulation inside the building
when the thermostatic valve shuts off flow to the
heat emitter(s).
It is recommended that the water temperature setpoint
of the furnace be set to 185˚F (85˚C) to decrease the
valves illustrated
likelihood of the water falling to 150˚F (65˚C). As a
result, the outdoor furnace will operate with a greater
efficiency and require less maintenance. Failure to
follow proper operating instructions may result in
furnace damage.
Fig. 20
Thermostatic Valve Exemption
If the system includes more than one building and one of
the buildings is heated with an oil, gas or electric boiler
that also serves as a backup for the other building(s)
by keeping the system water temperature above 150˚F
(65˚C) when the outdoor wood furnace is not fired, the
thermostatic valve is not required.
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