Eppendorf Galaxy CO2 Sensor - Manual (Page 65)

Equipment options
Galaxy ® 170 R/170 S CO
2
Incubators
English (EN)
65
12 Equipment options
12.1 Cooling system
The cooling system option allows the incubator to be used in one of three possible modes. The cooling
system option consists of a heat exchanger assembly, fitted to the rear wall of the chamber, with a
circulation fan.
Inside the incubator chamber, the heat exchanger cooling fins and fan are enclosed by a removable cover,
with ventilation slots to facilitate airflow to the fan and to the shelves. To cool the chamber, the fan on the
heat exchanger assembly circulates chamber air across the cooling fins of the heat exchanger.
Outside the chamber, the rear of the heat exchanger assembly has an external cooling fan to cool the
exchanger’s hot fins by blowing ambient air across them.
The three modes of operation accessible in the USER menu under COOL OPTIONS are explained in the
following table.
Before running the incubator with the cooling system option, ensure that the heat exchanger assembly
cover is in place, also ensure that the humidity tray is pushed fully towards the back of the chamber to
prevent deflector plate condensation from draining behind the tray, onto the base of the chamber.
The heat exchanger cover can be removed for cleaning: remove it from the four keyhole studs that hold it in
place by gently lifting the cover out of the key-hole slots and then lifting it away toward you, taking care not
to force it; damage to the inner components could result. Be sure to reinstall the cover carefully before
operating the incubator again.
In all operating modes the ambient room temperature is assumed to be maintained at a
uniform level. Changing from one operating mode to another requires manual mode selection.
Mode Description
NORMAL For working at 37 °C in average ambient temperatures of 20 °C - 26 °C. In this mode,
the fans and heat exchanger assembly are switched off and the heating system
operates as standard, without using the cooling option. The cooling system remains
inactive.
AMBIENT For culturing at temperatures close to room ambient temperature, therefore
maintaining the chamber temperature within a range close to room ambient
temperature. In this mode, the fans and heat exchanger, and the heating system are
switched on to balance each other.
COOL For culturing continuously between 1 °C - 10 °C below room ambient temperature. In
this mode, the cooling system operates as with AMBIENT culturing , but with the
heating system deactivated.