Eppendorf CO2 Back-up System - Manual (Page 20)

Installation
New Brunswick CO2 Back-up System
English (EN)
20
1. Remove the two screws on the lid or door of the freezer and retain for re-use.
2. Fasten the door switch magnet in place using the two screws removed above. The magnet should face
toward the case of the freezer. The magnet portion of the sensor can be identified by the lack of
electrical wires
3. Remove the screws on the case of the freezer.
4. Using the screws provided, fasten the magnet sensor that has the electrical cable attached.
5. Close the lid or door to check that the two parts of the switch do not touch. There should be a gap of no
more than 3 - 10 mm (0.12 - 0.4 inches).
6. If gap is larger than 10 mm, or less than 3 mm, loosen the screws and adjust the magnet until the gap is
corrected.
7. Tighten screws.
6.11 Installing cables to back of control unit
Note: Some kits are supplied with more than one removable power cord. Use the power cord that matches
your power receptacle. Check the voltage rating plate on the underside of the control unit to confirm that
the system is compatible with your laboratory power supply.
1. Place the control unit on top surface of upright freezer, or on compressor compartment of chest freezer.
2. Plug solenoid valve cable into appropriate socket (labelled Solenoid Valve on back of unit).
3. Plug temperature sensor cable into appropriate socket (labelled PT100 Probe).
4. Plug door switch cable into the appropriate socket (labelled Door Switch).
5. Choose appropriate power cord to use. Sytem is capable of operating within this voltage range: 100/
240 V 50/60 Hz
6. Insert power cord into socket on back of system.
7. Plug power cord into mains.
CAUTION! Failure of system to operate correctly
 Ensure magnetic door switch is installed correctly
CAUTION! Failure of system
 Ensure that the control unit's voltage rating matches you electrical supply
 Do not plug in unit if you are not sure of electrical supply voltage rating
Only use approved power cords with the correct rating. Contact Eppendorf sales office for
replacement cords.