Models 3940 and 3949_________________________________________________________________Start-Up and Operation
3 -1
Section 3 - Start Up and Operation
Figure 3-1, Reach-In Incubator Control Panel
shown with optional CoBex Recorder
3.1 The Control Panel
Main Power Switch and Indicator Light (Figure 3-2)
The main power switch controls power to the incubator.
The main power indicator lights when the power switch is
on and the unit is receiving power.
Refrigeration Switch and Indicator Light (Figure 3-2)
The refrigeration switch controls power to the refriger-
ation system. The refrigeration indicator lights when the
refrigeration switch is on and the compressor is receiving
power.
Defrost Switch and Indicator Light (Figure 3-2)
The defrost switch controls power to the defrost sys-
tem. The defrost timer is factory set to provide two 15-
minute defrost cycles during a twenty-four hour period.
The defrost indicator lights when the defrost switch is on
and the incubator is in a defrost cycle.
The defrost switch must be turned on when the
temperature setpoint is 10°C, or below.
A
B
C
Figure 3-2
Overtemp Safety Control, Indicator Light, and Audible
Alarm (Figure 3-2)
The overtemp safety thermostat should be set slightly
above the operating temperature of the incubator. In the event
of an overtemp condition, the overtemp safety thermostat will:
• Activate the audible alarm and the overtemp indicator
light.
• Interrupt power to the heaters and maintain the incubator’s
cabinet temperature at the overtemp safety control point.
Note
: The overtemp control is not directly calibrated. The
numbers (0 to 10) on the dial are for reference only and do not
correspond to any specific temperature.
If an overtemp condition occurs, the alarm can only be
silenced by raising the overtemp safety thermostat setting.
However, the cause of the problem must be determined and cor-
rected before normal operation under the main temperature con-
troller is resumed.