OPERATORS MANUAL
ORION II
Orion II 500-10000 Operators
Page 24 of 95
Manual Part no: DOMAON0100 Issue A
April 2008
calculate the volume of water that the primary softener (SOF10-01) can treat before it becomes
exhausted and initiates regeneration before this point is reached. The secondary softener (SOF10-
02) is regenerated after every third primary softener regeneration (Total Hardness < 300mg/l) or
after every second primary softener regeneration (Total Hardness > 300mg/l).
When SOF10-01 is in regeneration by-pass valve VA10-02 is open to feed water directly to SOF10-
02, enabling continuous production of soft water. Similarly when SOF10-02 is in regeneration by-
pass valve VA10-04 is open to feed water to TK30-01.
The softeners are interlocked so that only one can regenerate at a time. A user with operator level
security access can manually initiate a regeneration and if necessary manually step each unit
through the regeneration sequence using the HMI.
There is an adjustable minimum time period between regenerations to allow for salt saturation in the
Salt Saturators.
The status of each softener, volume throughput, volume remaining on SOF10-01, last regeneration
time and other data are displayed on the HMI.
Sample valves SV10-02, SV10-03 and SV10-11 can be used to sample the water to establish the
performance of the softeners.
Where the feed water has been dechlorinated the Standard Base Exchange Softener softener option
can be used, although it should be recognised that CarboSoft provides an excellent degree of
protection from oxidative damage to the RO and CEDI modules should an unexpected quantity of
chlorine appear in the feed water.
RO and CEDI modules on units supplied without CarboSoft softeners will not carry warranty
against oxidative damage.
5.1.2 Cartridge Filtration
5µm cartridge depth-filters are located downstream of the softeners to remove particles from the
water to protect the RO system. The filter cartridges are contained in either one or two housings
according to the size of unit and are designated FI10-01 (& FI10-02 where fitted).
Local pressure indication (PI10-02 & PI10-03) is used as a guide to cartridge replacement with
cartridges being replaced when the pressure drop across the housing reaches 1.5bar. Manual
valves, V10-04 and V10-08 are used for isolation of the filter housing(s) during cartridge replacement
and a drain valve V10-06 (& V10-07 on twin housing units) allows the housing(s) to be drained
before filter replacement.
5.1.3 Interconnecting Pipework
An automatic fail closed valve (VA10-06) on the feed to TK30-01 allows for automatic control of flow
into the break tank during HWS and chemical cleaning (CIP) cycles.
A short length of stainless steel pipe separates the „cold‟ pre-treatment system from the potentially
„hot‟ RO feed tank (TK30-01) to allow heat dissipation during hot water sanitisation.
5.1.4 Cooling Water Line
An automatic valve (VA10-05), fitted with a limit to open device (set up on commissioning) is located
on a branch line prior to TK1. VA10-05 is open during Cooling Stage 1 following hot water
sanitisation (HWS) to cool the hot water as it flows to drain. This prevents drain water maximum
