Air Chiller System (ACS) and Chiller Panel Getting Started Guide for the DMA 850 Page 12
Internal Timer
The ACS contains an internal timer that keeps the purge gas solenoid valve closed until the system is fully
ready. When the ACS is powered on, each Chiller stage energizes in sequence. The timer circuit begins
counting after the final stage powers on. Once the final stage powers on, the timer counts approximately 30
minutes before it allows the ACS purge gas solenoid valve to open. Therefore, it will take approximately
60 minutes from when the ACS is powered on until it is ready to operate, and for cold gas to flow.
If the unit is used on a recurring daily basis, the ACS can be plugged into a power outlet that has a timer set
to turn the instrument on one hour before the system is to be used.
Transfer Line
The ACS has a vacuum-insulated delivery line that carries the refrigerant to the evaporator and back. This
flexible delivery line is made of corrugated stainless steel tubing.
CAUTION: Although this line is strong, it can be damaged to the point of rupture if it is repeatedly
bent too sharply or twisted forcibly. This line must remain gas-tight in order to contain the refriger-
ant charge in the unit. The delivery line is brittle when cold. It should not be moved, bent, or discon-
nected when cold.
MISE EN GARDE: Bien que cette ligne est fort, il peut être endommagé au point de rupture si elle
est plié trop fortement ou tordu. Cette ligne doit rester étanche aux gaz afin de contenir la charge de
fluide frigorigène dans l'unité. La ligne de livraison est fragile à froid. Il ne devrait pas être déplacé,
plié, ou déconnecté à froid.
Figure 2 Transfer line.
To Next Page
General