Watson-Marlow 620U - Manual (Page 84)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 84
Pre-load checks
Before loading tubing, ensure that all rollers rotate freely, that the tube ports
and location grooves are clean and that if in use, the controlled waste pipe
work is free of any obstructions.
Closing the pumphead guard and start-up
Ensure that the guard seal is clean, replacing it if necessary.
Ensure that the rollers are engaged and locked out against the tubing
Close the guard and push it against the track until the latch engages.
Connect suitable pipe work to the pumphead using the appropriate connectors
for the tube element. See below.
26.6 620RE and 620RE4
tube element loading
Always isolate the pump from the mains power
supply before opening the guard or performing
any positioning, removal or maintenance.
620RE element pumpheads are factory set to accept Watson-Marlow LoadSure tube
elements. Pumping performance will be adversely affected if LoadSure elements are
not used.
Open the guard using a suitable screwdriver or a 5mm Allen key. Disengage the
rollers.
Locate one of the “D”-shaped flanges into the lower port. (The “D” flange
ensures that the element can only be loaded correctly).
Wrap the tube element around the disengaged rollers of the rotor.
Locate the second “D”-shaped flange into the upper port.
Ensure the flat face of each “D” flange sits flush to the flange sealing face of
the track.
Engage the rollers.
Close the guard and push it against the track until the latch engages.