Speci cations to determine the water capacity of the
Wood Gun™ installed (do not use the BTU rating).
e expansion tank or air cushion tank that was
originally installed will not likely be adequate for the
additional volume of water added to the system with
the inclusion of a Wood Gun™.
e tank must be
sized based on total water volume and the di:erence
between the low and high temperatures of this water.
When properly sized, it will accommodate the
thermal expansion of the water being heated without
creating an overpressure situation. Some closed loop
systems are isolated from an open (atmospheric) side
of the system, or another closed loop, by a heat
exchanger. For calculating system volume, only the
volume in each respective closed loop is calculated,
with each closed loop receiving its own dedicated
expansion tank capacity. If the auto ll valve engages
and adds water to the system when cold, and the
boiler subsequently builds too much pressure when
hot, you do not have adequate expansion capacity.
Return Water Temperature
As a rule, water returning to the boiler should be
not more than 20º F less than supply water
temperature going to the system. A recirculation
loop is a requirement to maintain optimum return
water temperatures.
is would optimally include a
thermometer on the return line entering the boiler
for monitoring purposes, and a mixing valve to
maintain minimum return water temperatures.
Return water temperature near or below 140º F
creates the risk of severe condensation issues.
is
will o9en produce unpleasant odors and possible
liquid runo: in the boiler room. More seriously, it
will lead to creosote formation on heat exchange
surfaces and inside the chimney, with accompanying
risk of a chimney re.
View the following diagram for a sample piping
layout utilizing a mixing valve on the boiler return.
e mixing valve shown is a cartridge type. Water
temperature is regulated by the use of a speci c
cartridge installed in the valve to control
temperature of the water returning to the boiler.
Three Mixing Valve: Return Water Protection
Low Water Cutoff
Photo: Low Water Cutoff Installation
- 12 -
It is very important to provide
adequate expansion tank capacity
based on the total volume of water
in the system, particularly when the
Wood Gun™ is added to an existing
boiler.
Summary of Contents for wood gun E100 SF
Page 2: ......
Page 24: ...Photo Smoke flap installed 19 ...
Page 46: ...Steel Center Brick 8 Inch 41 ...
Page 49: ...Appendix A Boiler Specification Diagram 44 ...
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Page 53: ...Appendix B Wiring Diagrams 48 ...
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Page 61: ...Appendix C Exploded Parts Drawings 56 ...
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Page 68: ...Appendix F Boiler Piping and Ducting Examples 63 ...
