Metrohm 709 IC Pump - Manual (Page 16)

2 Installation
709 IC Pump
8
2.2 Mounting the pump head
To ensure that the pump drive is not damaged during transport a black
plastic block is mounted in place of the pump head on the right side of
the 709 IC Pump front panel. This transport safeguard block has to be
removed after undoing the four screws.
To avoid any damage to the pump head, the protective block must be
remounted if the pump has to be moved any great distance.
Next, the 6.2824.040 Pump Head 18 (6.2824.040 or 6.2824.100) with in-
tegrated piston units is unpacked and fixed in place of the transport
safeguard block with the four hexagon screws 19 as shown in Fig. 2.
To ensure that the pump head is not positioned wrongly, the holes at
the rear for the clamping bolts have different depths, i.e. 1 clamping
bolt is longer than the rest. The deepest hole must naturally accom-
modate the longest bolt. If this is not the case, the pump will not
function properly.
The connection capillary 14 fastened to purge valve 24 is screwed onto
pump head 18 as shown in Fig. 2.
The 2.709.0110 IC Pump MF (metal-free version) should only be
operated in the pressure range of 0 … 25.0 MPa (0 … 250 bar). With
higher pressure, the 6.2824.100 PEEK pump head can be damaged.
So make sure that the maximum shutoff pressure P
max
of the pump is
always set to ≤ 25.0 MPa (see section 3.4.2).