17
©2009 Eco-Orlan USA LLC. All Rights
Reserved
.
Revised August 2009.
20. Boiler Shutdown
The boiler turns off in two ways: manually when the power switch on the controller is turned off, or automatically when the wood
supply has burned out. NEVER turn the controller off for extended periods of time when the boiler contains burning fuel. Doing so
could cause the boiler to overheat. If you want to shut down the boiler, set the controller set point to minimum and let the fuel burn
out.
21. Operating Temperature
Maintaining the proper temperature of the water in the boiler during operation is very important. For proper gasification to occur, the
boiler water temperature should be 140°F or greater.
At times, such as when there is a large need for heat, the return water temperature may become too low. This can result in poor
gasification and decreased efficiency, as well as creosote buildup in the gasification chamber, heat exchanger tubes and chimney. Low
temperature return water entering the boiler can also shorten the life of the boiler. The return water temperature should not be allowed
to drop below 140°F. This can be achieved with a properly installed 3-way or 4-way mixing valve.
22. Primary, Secondary and Blower Air Inlet Settings
A critical phase of successful set up of a Paxo® boiler for operation involves setting three air supply openings:
1.
Primary Air Setting
2.
Secondary Air Setting
3.
Blower Air Inlet Setting
Charts below will help you determine how to set each one, depending on the model of your boiler and the variables affecting its
operation like wood moisture content and chimney draft.
Paxo
®
boiler Air Adjustment Guide
Model/
Btu
output
Primary air opening (mm)
Chimney draft 0.04 IWC
Chimney draft 0.08 IWC
Wood Moisture %
Wood Moisture %
15 20 25 30 35 15 20 25 30 35
Paxo
®
18
75,000 Btu
9
9
10 11 12 9
9
9
10 11
Paxo
®
25
85,000 Btu
9
9
10 11 12 9
9
9
10 11
Paxo
®
40
137,000 Btu
9
10 10 11 12 9
9
10 10 11
Paxo
®
60
205,000 Btu
9
9
10 11 12 9
9
9
10 11
Paxo
®
80
275,000 Btu
9
9
10 11 12 9
9
9
10 11
Model/
Btu
output
Number of turns for secondary air
Chimney draft 0.04 IWC
Chimney draft 0.08 IWC
Wood Moisture %
Wood Moisture %
15 20 25
30
35 15 20 25
30
35
Paxo
®
18
75,000 Btu
3
3
3
3.5 4
3
3
3
3
3.5
Paxo
®
25
85,000 Btu
3
3
3.5 3.5 4
3
3
3
3.5 4
Paxo
®
40
137,000 Btu
3
3
3.5 4
4
3
3
3.5 3.5 4
Paxo
®
60
205,000 Btu
3
3
3.5 4
4
3
3
3
3.5 4
Paxo
®
80
275,000 Btu
3
3
3.5 4
4
3
3
3.5 3.5 4
