Robertshaw RS4220 Thermostat User Manual


 
CYCL = Cycle Timer allows a compressor to rest between cycles. Can be
set from 0 to 5 minutes in 1 minute increments.
WARNING: A wrong short cycle setting can damage your
equipment. This should only be changed by a trained HVAC professional.
CAL = Calibration offset. Changes the displayed temperature from the
actual temperature by +3 to -3 degrees in one degree increments.
Increasing the offset by +2 will cause the thermostat to display a
temperature that is 2 degrees higher than the actual room
temperature.
Security Lockout to Protect the Settings
The buttons on the front of the thermostat can be locked with a password.
To create a password:
1. Press the and buttons at the same time and hold them in
for 5 seconds.
You will be asked for a 4 digit password.
2. Each digit is set using the and buttons. Press the to
move to the next digit. Press to move back.
3. The password is saved after 10 seconds or by pressing and
at the same time.
All of the front buttons are now locked out until the password is entered.
Pressing any button will cause to flash.
To unlock the buttons:
1. Push and hold the and buttons for 5 seconds until the
request for password is displayed.
2. Enter the digits for the password by pressing the and
buttons. Press the to move to the next digit. Press to
move back.
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