Forma
Model 700 Series____________________________________________Operation
2-1
Section 2 – Operation
2.1 Changing the Control Temperature Set Point
1.
Remove the screwdriver on the front left corner of the control panel.
2.
Press and hold in the PRESS-TO-SET key on the control panel.
3.
Using the screwdriver, turn the SETscrew until the desired temperature is displayed.
Clockwise lowers the temperature and counter clockwise raises the temperature. The
approved operating temperature range for the 707 & 771 is -50°C to -86°C and the
range for the 733 & 754 is –50°C to –77°C.
The unit should NEVER be set to operate below the approved
operating range. Setting the unit below this range will cause the
compressors to operate continuously and reduce compressor life.
2.2 Changing the Over Temp Alarm Set Point
The following procedure sets the alarm for
a precise temperature during initial set up. If a
precise temperature is not required, set R9 to
the desired temperature.
1.
Set the unit to operate at the desired alarm
point (see Section 2.1) and allow the unit
to operate until it reaches the set point.
2.
Remove the top two screws securing the
control panel and loosen the bottom two
screws. Carefully remove the control
panel.
3.
Remove the six screws securing the cover of the
box attached to the inside of the control panel to
expose the alarm board.
4.
Turn the switch on the control panel to the NORMAL position.
Figure 2-1, Temperature
Alarm Circuit Board
showing R-9 Control
