BTU XT-70 - Page 45

45
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XT-70 Control Panel 45
E2 Parameters Definition:
will initially go to in burner mode and then it will start the PID control. The uom
is percent. The default setting is 20 percent.
MAX_DOOR: CO
2
purge max door opening. This setting will only allow the fresh air doors to
open a maximum amount during a CO
2
purge for refrigeration. The default set
ting is 20%.
CO2_DIFF / DEHUMID DIFF: CO
2
differential. This setting will determine how far below the CO
2
Setpoint
that the purge will go before shutting off. The default setting is 200 ppm.
Dehumid Diff. This setting is used to determine that the OSA is cold enough to
dry out the return humidity. This is used on the conventional Onion software.
The default setting is 10.
BURNER_DEHUMID This is an Onion parameter. This is the value the valve will initially go to when
the burner is Dehumid. The default setting is 10 percent.
ROL_START_DLY: Refrigeration operating level start delay. This timer provides an initial delay for
the ARL loading control logic. The default setting is 10 minutes.
AUX 1_CONFIG: This setting will configure the Aux 1 output for different control configurations. A
setting of 0 will cause the Aux 1 output to follow the fan operation.
A setting of 1 will configure Aux 1 for ERV control. Energy Recovery Ventilator
Control turns on the Aux 1 output when CO
2
levels exceeds the CO
2
setpoint
and shuts off when the CO
2
level drops below the CO2_DIFF. A setting of 2 will
change the Aux 1 switch to a Dehumid switch. When this switch is in Auto, it
will activate the Dehumidification logic. See the Dehumid flow chart for more
details. The default setting is 0. A setting of 05 will set the switch up for
Ceiling heat. See E2 parameter C_H_TIME for more information. A setting of 4
is used for systems sharing a refrigeration condenser unit. The Aux will be on
when the system is in Refrig and the fans are running. A setting of 6 will
trigger the output on when the Refrig level goes above a preset value. The
output will go off when the value drops below a the low cutoff value.
AUX 2_CONFIG: This setting will configure the Aux 2 output for different control configuration. A
setting of 0 will cause the Aux 2 output to follow the fan operation. The default
setting is 0. A setting of 188 will activate the Warming mode. A setting of
05 will set the switch up for Ceiling heat. See E2 parameter C_H_TIME for
more information. A setting of 05 will set the switch up for
Ceiling heat. See E2 parameter C_H_TIME for more information. A setting of 4
is used for systems sharing a refrigeration condenser unit. The Aux will be on
when the system is in Refrig and the fans are running. A setting of 6 will
trigger the output on when the Refrig level goes above a preset value. The
output will go off when the value drops below a the low cutoff value.
DOOR_CONFIG This setting will configure the XT door open and close outputs for different
control configurations. A setting of 0 will configure the outputs for pulse control.
Pulse control will cause the open output to produce a open pulse and the close
output to produce a close pulse. A setting of 1 will configure the outputs for