15
March 2011
Flex Fuel Owner’s Manual
5: Installation
Expansion Tank (20 Gallon Shown)
0020-247
1” Blk St 90
0020-247
1” Blk St 90
0020-250
1” x 2” Blk nipple
0020-273
Vent Cap
0020-140
1” Pex x 1” MPT
0020-140
1” Pex x 1” MPT
1” Pex Line
1” Pex Line
1” Pex Line
0020-142
1” x 1” Pex
Crimp 90
0020-142
1” x 1” Pex
Crimp 90
0020-145
1” Pex Crimp
Ring
0020-145
1” Pex Crimp
Ring
To Furnace
Vertical Orientation
Expansion Tank Kit (020-0008)
Part No.
Description
0020-273
Vent Cap
0020-250
1” x 2” Blk nipple
0020-247
1” Blk St 90 (2)
0020-140
1” Pex x 1” MPT (2)
0020-142
1” x 1” Pex Crimp 90 (2)
0020-145
1” Pex Crimp Ring (6)
0020-044
44” of Clear 1” Pex
Note: Contents are the same for both horizontal and vertical layouts.
Buffer Tank
The size of the buffer tank is determined by the size of the furnace. Recommended buffer tank capacities
are approximately 165 gallons for the Flex fuel 30 kW running only on pellets, and approximately 300
gallons if bulk materials are to be used. Approximately 285 gallons is recommended for the Flex fuel
60 kW running only on pellets and approximately 600 gallons if bulk materials are to be used. Different
configurations are available depending on your application. Tanks are available in 165, 220, 285 and 550
gallon sizes. Please contact your WoodMaster Flex fuel Dealer for further assistance. Additional water
storage will increase time between fills if you are running bulk materials. Your buffer tank should be
insulated.