![background image](http://html1.mh-extra.com/html/hanna-instruments/bl1-5/bl1-5_instruction-manual_3671576026.webp)
26
CLEANING THE PUMPHEAD
The pumphead should be cleaned at regular intervals and at least
once a year. Remove the deposits that form in the cavities with a
solution that is neutral to the chemical the pump has been dosing.
Inspect the head for any cracks or worn areas.
Replace if necessary with parts from the pumphead spare part
HI 721106
(for BL7, BL10, BL15 and BL20) or
HI 721107
(for
BL1.5, BL3 and BL5).
SCHEDULED MAINTENANCE
After 50 hours
Tight the pumphead screws with a torque force of 2.5 Nm (22" lbf).
After 12 months
It is recommended to replace
HI 721102
,
HI 721103
(suction
and discharge valves assemblies) as well as the O-rings. The LDPE
hose can also deteriorate over time and, for safety reasons, should
also be changed with
HI 720032
.
After 24 months
It is recommended to replace
HI 721102
,
HI 721103
,
HI 720032
and
HI 721106
(for BL7, BL10, BL15 and BL20) or
HI 721107
(for BL1.5, BL3 and BL5).
Summary of Contents for BL1.5
Page 11: ...11 VALVE HOSE ASSEMBLY DIAGRAM...