Owner`s manual

Page 25 of 40
Drawing : - TPC229
Issue : - 2
Date : - 10/12/13
Two things are very important:
A. THE RATE OF TEMPERATURE INCREASE MUST NOT BE
MORE THAN 5ºC (9ºF) PER DAY.
Never set the thermostat more than 5ºC (9ºF) above the present
kiln temperature.
Rapid temperature increases cause the relative humidity to
suddenly drop leading to surface and end checking of the
lumber.
A. THE KILN TEMPERATURE MUST NOT EXCEED THAT
WHICH IS SAFE FOR THE MOISTURE CONTENT OF THE
LUMBER.
The maximum chamber temperature, shown on the preceding
graph, indicates the maximum safe kiln temperature at every
stage of drying.
The temperature graph implies that you must measure the
lumber moisture content each time before increasing the
temperature when operating above 35ºC (95ºF). to determine if
drying cycle is complete, the lumber moisture content must be
actually measured using a moisture meter or the oven dry
method.
4. To check that the drying rate is correct, allow the kiln about 3 days to
stabilize after starting and then measure the water extracted during a
24-hour period. As the wood dries, the drying control and thermostat
may be increased to maintain the water extraction rate.
Completing The Run: When the drying cycle is complete, leave the wood for
approximately 24 hours in the chamber with the Drying Control setting
reduced to 10% and the thermostat reduced to its lowest setting. This will
allow the residual moisture within the wood to become more evenly
distributed.