5 - 1
Section 5 - Service
Servicing must be performed by qualified service
personnel only!
De-energize all potential sources of energy to this
unit and lockout/tagout their controls.
5.1 Accessing the Electrical Components
To gain access to the electrical components, remove the
two screws located on the left side of the control panel with a
Phillips screwdriver. The control panel is hinged and will swing
open.
5.2 Replacing Over/Undertemp Probe and Thermostat
1. Remove the incubator ceiling by removing the screws
holding it in place.
2. Remove the top three screws from the top of the right
duct cover.
3. Lean the duct sheet out, and remove the Permagum seal
from around the probe access hole.
4. Remove the 15” copper capillary overtemp probe by
extracting two plastic clips that hold the probe in place.
5. Open the control panel by removing the two screws
located on the left side of the control panel.
6. Pull the overtemp probe up through the access hole and
into the control panel.
7. Follow the wires from the probe to the thermostat
mounted on the control panel. Clip the plastic ties hold-
ing the overtemp cable to the existing wiring.
8. Pull the overtemp knob on the control panel off.
9. Remove the two screws that hold the overtemp assembly
to the control panel.
10. Disconnect the two wires from the back of the thermo-
stat assembly.
11. Pull the entire assembly from the panel, and remove the
unit.
12. Replace the thermostat and probe.
Note:
Reseal probe access hole with Permagum and tie-wrap
overtemp cable to existing wires after replacing probe.
5.3 Replacing the Temperature Sensor
1. Locate the probe mounting plate in the center of the
right side of the incubator interior.
2. Open the mounting plate by removing the screws that
hold it in place.
3. Locate the humidity sensor mounted on the inside of the
panel in a black housing. Note the angle of the probe.
4. Grasp and unplug the probe from the probe cable.
5. When replacing the humidity sensor, be sure to mount
the probe at the same angle as it was originally mounted.
5.4 Programming the Temperature Controller
The Watlow temperature controller has been set at the fac-
tory to operate the incubator within the specifications listed in
Section 6 of this manual. Reference copies of the Watlow con-
figuration records are included at the end of this section.
To prevent tampering, mechanical and software lockouts
are employed in the system. These lockouts must only be
removed by persons skilled in configuring controller software.
Re-programming either the temperature or humid-
ity controllers alters the factory defaults and will
seriously alter the performance of the incubator.
This may also void the warranty. Do not reconfig-
ure the controllers without first consulting the
Technical Services Department, (888) 213-1790.
a. Removing the Mechanical Lockout
Make sure the unit is turned off.
Wearing a grounding wrist strap or maintaining constant
contact with the metal cabinet, press in the four locking tabs on
the frame of the Temperature controller. There are two tabs on
either side as shown in the front and side views in Figure 5-1.
When all tabs are unlocked, pull the controller module out of its
frame.
Environmental Chamber _____________________________________________________________________________Service
Figure 5-1
