ABB Endura AZ20 Instruction page 6

6 E N D U R A A Z 2 0 , A Z 2 5 , A Z 3 0 | P U M P E D R E F E R E N C E A I R U N I T | I N F 0 9/0 2 7- E N R E V. F
...2 Installation
Reference air connections
CAUTION
It is important that air to the pump inlet is clean and dry.
Failure to observe this requirement causes damage to both
the pump and the probe.
Referring to Figure 5:
1 If necessary, connect a pipe to the pump (suction) inlet
and ensure the other end of the pipe is located in a clean,
dry area.
2 Connect the pumped reference air outlet
reference air inlet on the probe – refer to individual probe
manuals for reference air connection details.
3 A flow restrictor
C in the pump outlet line ensures the
correct flow is delivered without further regulation from the
pump. Ensure the flow restrictor is in place to protect pump
components.
A
B directly to the
Inlet (suction)
Figure 5 Pumped reference air unit inlet and outlet
Outlet
see step 1 (delivery)