Eliwell Coldface EWHT800LX Series Manual page 7

THE INSTRUMENT ENABLES MODIFICATION OF OTHER PARAMETERS DIVIDED INTO USER
LEVEL (USr) and INSTALLER LEVEL (InS)
How to modify other parameters
Installer (InS) level access - User level access is similar:
Procedure applies only to more advanced applications. In this case the parameters are arranged in
folders (Compressor / Defrost / Fans etc)
1) Press and hold the SET key for 3 seconds until the display shows PAr / Lite
2) Use the UP & DOWN keys to select the parameter level concerned (Usr or Ins)
3) Press and release the SET key once more. The display will show the first folder
4) Press and release the SET key once more. The upper display will show the first parameter in the
folder, the lower display will indicate the current parameter value
5) Using the UP & DOWN keys, find the parameter that you wish to modify
6) Press and release the SET key once more. The upper display will show the name of the blinking
parameter
7) Use the UP & DOWN keys to adjust the parameter value
8) Press and release SET to save the parameter value
9) Return to step 5) or press ESC several times to return to the normal display
OPERATION IN DEFAULT CONFIGURATION
The instrument is configured for negative cold. For positive cold, disable the evaporator probe Pb2
(set H42=0) and set relay OUT5 (parameter H25) = 6 (STANDBY) or 0 (DISABLED) to prevent con-
tinuous ventilation.
DEHUMIDIFICATION
Digital output OUT1 is configured as dehumidification relay. It switches on if the relative humidity is
greater than the Humidity Setpoint SPH + dbH (intervention half-band, always positive) and switches
off when the value is SPH. Dehumidification is activated by relay (H09=0).
SPH = 20.0°C Humidity Setpoint
dbH = 5.0°C intervention half-band, always positive
dFH = differential = 0 => dFH = dbH
HUMIDIFICATION
Digital output OUT2 is configured as humidification relay. It switches on if the relative humidity is
less than the Humidity Setpoint SPH - dbH (intervention half-band, always positive) and switches off
when the value is SPH. Humidification is disabled during defrost (dEH=0).
NOTE:
• Humidification and dehumidification are in Neutral Zone mode (H05=nE)
• Humidification and dehumidification are disabled during defrost (dEH=0)
HEATING
Digital output OUT3 is configured as heating relay. It is activated in Neutral Zone mode (H07=1).
Heating mode:
It switches on if the temperature is less than the Heating Setpoint StH - db (intervention half-band,
always positive) and switches off when the value is StH.
StH = 0.0°C Heating Setpoint
db = 2.0°C temperature intervention half-band, always positive
diH = differential = 0 diH = db
Cooling mode:
It switches on if the temperature is greater than the Cooling SetPoint SEt + db (intervention half-
7 - EN EWHT800LX