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XT-70 Control Panel 47
E2 Parameters Definition:
Settings: heat diff 0.2°F; heat update 40 seconds; heat pulse width 5 seconds
If the plenum temperature drops 0.5°F below setpoint, The Heat mode will be
activated. There is no parameter that will allow anything other than .5. The
heat output will be on for five seconds and off for 35 seconds. If plenum
temperature remains below setpoint - heat diff, heat output will increase to ten
seconds On and 30 sec Off. Heat On time will continue to increase, if needed,
five seconds every 40 seconds until the heat stays on for 40 seconds of every
40 seconds.
When plenum temperature is between setpoint and the heat diff, the time On
and time Off will freeze and neither increase nor decrease, if the plenum
temperature hasn’t changed since the previous update. If the plenum
temperature has climbed since the previous update, the time On will decrease
five seconds. If the plenum temperature has dropped since the previous update,
the time On will increase five seconds.
If the plenum temperature climbs to setpoint, the heat On time will decrease to
0.
PANEL_CNFG This has to do with the humidity sensors and the way they are read. The origin-
nal XT board is slightly different than the Rev A and greater boards. If an
original board, this needs to be set to 0. Rev A and greater should be set to 1.
The default setting is 1. A setting of 2 will turn the Return Air Humidity sensor
Input into a Ethylene sensor 0-5ppm input Original Panel. Three will select
Ethylene an sensor 0-5ppm when using a rev A board. A setting of four will set
the panel up for using a heat pump on the heat output
PURGE_CNFG Purge config. There are six possible configurations.
0 = No Time Purge or ARL/CO2
1 = Time Purge, no ARL/CO2
2 = ARL, no CO2 or Time Purge
3 = ARL/CO2, no Time Purge
4 = ERV (Energy Recovery Ventilation) No CO2
5 = ERV (Energy Recovery Ventilation) / CO2
6 = Time Purge / Cooling Purge with CO2 sensor
7 = Cold Purge with CO2 sensor
The default setting is 3.
SP_DIFF This is a Onion parameter and applies to the MVG onion program only. Setpoint
differential is used to determine when the temperature of the outside air is
acceptable for both curing and cooling. The default setting is 5.
PILE H CFG The Pile Humidity Config is a Onion parameter and applies to the MVG onion
program only. This parameter is used to determine which of the pile humidity
sensors is used for control.
1 = Pile 1H
2 = Pile 2H
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