HUGFEN C31-2 - Manual (Page 20)

Electrical Description
Description of Components
1. "ON / OFF" Switch
This switches the live side of the power supply to the circuit. All models are fitted with a rotary type cam switch.
2. Compressor (complete with control box)
The compressor is a single phase type and incorporates a "start" circuit to avoid risk of a stalled motor on start-
up.
3. General
The air cooled condenser fan will run under the control of the controller sensing the temperature in the
compressor discharge line.
Controller
The above controller is fitted on the C series of compressed air dryers. It is used to control the fan and the hot
gas valve (if fitted). It also displays the dewpoint temperature and controls the time settings for the drain valve.
This time setting can be changed to suit the site requirements as follows.
Note: the “TEMP IN” and “TEMP OUT” buttons are not functional on the C series compressed air dryers
1. Valve Close Time (the time the valve is closed between discharges. Variable between 1 & 20 mins)
Hold the “UP” button for 15 seconds. The display will start blinking, displaying the valve close time. Press the
“UP” or “DOWN” arrows while the display is blinking to change the setting. If any other button is pressed, the
display will return to original display and ignore the new setting. After the new value has been set, leave the
controller for 15 seconds. The display will return to the dewpoint value, and the new setting will be stored.
2. Valve Open Time (the time the valve is open to discharge. Variable between 4 & 20 secs)
Hold the “CLOCK” button for 15 seconds. The display will start blinking, displaying the valve open time. Press
the “UP” or “DOWN” arrows while the display is blinking to change the setting. If any other button is pressed, the
display will return to original display and ignore the new setting. After the new value has been set, leave the
controller for 15 seconds. The display will return to the dewpoint value, and the new setting will be stored.