![CORNING Ascent 6970 Instruction Manual Download Page 21](http://html1.mh-extra.com/html/corning/ascent-6970/ascent-6970_instruction-manual_2668650021.webp)
17
Instruction Manual
Table 5-9
. Pinch valve colors and positions for tubing load. The valve position channels tubing flow to a specific bottle.
Image
Description
Valve Position
Top
Bottom
The red and orange pinch valves perform the following:
• Media addition bottle to MCV
• MCV to media waste bottle
• MCV to media addition bottle (in dilution/perfusion mode)
The red pinch valve moves media to and from the media
addition or waste bottles.
The orange pinch valve selects which MCV tube the media will
flow through to add or remove media from the MCV.
Currently only tubing that is going through top position of
pinch valve is programmed to add and/or remove media from
the MCV.
Media Waste
bottle
Bottom dip tube
in MCV
Media Addition
bottle
Top dip tube in
MCV
The yellow pinch valve works with the recirculation pump
to channel either harvest wash or harvest solution to the
bioreactor.
Harvest Solution
bottle
Harvest Wash
bottle
The green pinch valve has the following functions:
• Channels flow from the bioreactor to harvest collection
bottle
• Channels harvest flush to the harvest solution bottle
during harvest solution recirculation.
Harvest Solution
bottle
Harvest Collection
bottle
The blue pinch valve channels flow from the bioreactor to the
harvest waste bottle or to the harvest flush bottle.
Harvest Waste
bottle
Harvest Flush
bottle
5.5 MCV and FBR Heaters
This section describes the heated MCV and FBR nests that are used during cell culture (Figure 5-28). During harvest, both the MCV and FBR
nest heaters are turned off. During in situ lysis, the MCV and FBR nest heaters remain on.
Figure 5-28.
MCV and bioreactor nests are
both heated. The temperature is monitored
by sensors in the media flow tubes from the
MCV to the bioreactor.
5.5.1 MCV Heater and Temperature Sensor
The MCV fits snugly in the machined aluminum nest. The MCV nest has two silicone pad heaters, one on the bottom, and one wrapped
around the sides, that work together to heat the media to a user-defined temperature. A temperature sensor monitors cell culture media
temperature in the MCV (Figure 5-18).
The MCV nest temperature working range is approximately 30°C to 42°C but may be adjusted via the HMI to operate over a wider
temperature range.