NTI WF200 Installation And Operation Manual page 10

Installation and Operation Manual
Table 5-2 System Major Component Checklist
Factory Supplied Components
 Pressure Relief Valve
 Pressure/Temperature Gauge
 Wood Boiler Circulating Pump
 Normally Open Zone Valve (Dump Zone)
 L4081 Aquastat – activates Dump Zone (&
Damper Motor for Add-on applications)
 Damper Motor
 L4006B Aquastat – activates Wood Boiler
Circulating Pump for Add-on applications
Expansion Tank – The expansion tank must be sized in accordance with the water volume of the system as well
as the firing rate of the appliance. It is important to locate the expansion tank in accordance with Figures 5-1
& 5-3
Ensure the expansion tank cannot become isolated from the boiler anytime the system is
operating. Failure to follow these instructions may result in discharge of the Pressure
Relief Valve may result in property damage or personal injury.
Normally Open Zone Valve (Dump Zone) – A normally open zone valve is factory supplied, and must be used
in the installation of a hot water circulation loop (or Dump Zone) designed to dissipate at least 10% of the
Approximate Firing Rate of the WF200 in the event that circulation is reduced because of electrical power
failure; see Figures 5-1 through 5-4. It is recommended to position the dump zone above the boiler, and to
design to loop to promote natural thermal circulation. Design parameters for sizing the Dump Zone shall
include:
(1) minimum pipe size of ¾ in. ID,
(2) room ambient temperature of 18°C (65°F), and
(3) a mean water temperature of 82°C (180°F)
Dump Zone – the hot water recirculation loop shall only be made inoperative by a
deliberate manual action. Failure to implement and maintain a recirculation loop able to
dissipate a minimum of 10% of the rated firing rate of the WF200 in the event that
circulation is reduced because of electrical power failure, may lead to excessive water
temperatures causing property damage fire or personal injury.
Before putting water into a new boiler, make sure that the fireside is ready for operation
(Note: do not light a fire in an empty boiler). Once water is introduced, and air is mostly
purged, operate the fireside to bring the boiler water up to temperature. This is necessary
because raw water must be heated to at least 180 ºF immediately after it is introduced into
the boiler, in order to drive off the dissolved gases, which might otherwise corrode the
boiler.
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Field Supplied Components
 L8124A Aquastat (or Equivalent) – existing on Oil Boiler, or used
to activate Wood Boiler Circulator and Damper Motor for Add-on
applications
 Central Air Removal Devices (i.e. Micro Bubbler or Air-Scoop)
 Pressure Regulating "Fill Valve"
 Backflow Preventer
 Expansion Tank
WF200