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Screen Appearance: SETUP 2
COMPRESSOR 80° F
It is the minimum temperature required to enable
the compressor. Below this temperature the
compressor will remain turned off.
3. Compressor hysteresis (0 to 20° C/F)
Screen Appearance: SETUP 3
Hy COMPRESSOR 1° F
This parameter is used to define a range around
the WB temperature setting where the status (On
or Off ) of the compressor is left unchanged. This
is useful to prevent undesired oscillations due to
the measurement precision or to small fluctuations
around the threshold values (see “Relay activation
conditions”).
4. Overheating threshold (0 to 20° C/F)
Screen Appearance: SETUP 4
Hy VENT 2° F
It defines a threshold above the DB temperature
setting to activate the overheating relay. The relay is
turned OFF when the DB temperature decrease to
the DB set point (see “Relay activation conditions”).
5. Humidification hysteresis (0 to 20° C/F)
Screen Appearance: SETUP 5
Hy SPRAY 2° F
This parameter is used to define a range around the
WB temperature setting where the status (On or
Off ) of the humidification relay is left unchanged.
This is useful to prevent undesired oscillations due
to the measurement precision or to small fluctuations
around the threshold values (see “Relay activation
conditions”).
6. Temperature hysteresis (0 to 20)
Screen Appearance: SETUP 6
Hy Temperature 1° F
This parameter is used to define a range around
the DB temperature setting where the status (On
or Off ) of the heating relay is left unchanged. This
is useful to prevent undesired oscillations due to the
measurement precision or to small fluctuations around
the threshold values (see “Relay activation conditions”).
11. Serial Address (0 to 128) (L53 Only)
Screen Appearance: SETUP 11
Serial Add x
It is used to assign a unique identification to the
controller when it is connected to a PC. Each kiln of
the plant must have a different address. The address
numbers assigned should be consecutive starting
from 1.
Appendix
Terminology
DRY BULB: The temperature as measured by a
thermometer.
WET BULB: The temperature of a thermometer
with a wet wick over the sensor.
WET BULB DEPRESSION: The difference between the
dry bulb temperature and the wet bulb temperature.
Example: if the dry bulb is 105º F. and the wet bulb
is 98º F., the depression is 105º F. - 98º F., or 7º F.
RH-RELATIVE HUMIDITY: The ratio of the amount
of water in the air to what the air could hold. At
50% RH, the air has 50% as much water in it as it
would hold at 100% RH. 100% is a 0º F. depression.
EMC-EQUILIBRIUM MOISTURE CONTENT: This is
the average moisture content all wood will reach
eventually when exposed to these conditions.
Example: At a dry bulb of 115º F. and a wet bulb
of 101º F., a 14º F. depression, the EMC is 10%. This
means that eventually all wood will average 10%.
Wood drier than 10% will pick up water and wood
that is wetter than 10% will give up water.
DRI-DRYING RATE INDEX: This is an index of relative
drying rate.
Example: If a dryer is operating at 120º F. and a wet
bulb depression of 12º F., and drying the load at a
rate of 1.5% per day, at the DRI is 1.1. If the wood will
dry at 2 times the rate (2.2/1.1=2), or 3% per day. This
assumes that other conditions remain the same.
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