Product Information
14
P
RE
P
AK
L1
P
RE
-S
YSTEM
P
RETREATMENT
P
AK
P
URPOSE OF THE
P
RE
P
AK
L1
P
RE
-S
YSTEM
P
RETREATMENT
P
AK
A PrePak L1 Pre-System Pretreatment Pak is used with either a Progard TL1 or a Progard TL2 Pretreatment Pak. A PrePak L1 Pre-
System Pretreatment Pak is used when a Progard L alone is not sufficient.
There is one version of the PrePak L1 Pre-System Pretreatment Pak (called “PrePak” in the remainder of this manual).
A PrePak is not included with the Elix System and needs to be ordered separately.
W
HAT IS NEEDED FOR A
P
RE
P
AK
?
A PrePak is mounted on a Pack Holder outside of the Elix System. The Pack Holder is typically located between the Inlet Solenoid
Valve and the Elix System Cabinet. The Pack Holder is not included with the Elix System and needs to be ordered separately.
The instructions for mounting the Pack Holder are inside its shipping box. The instructions for mounting it are not inside this
manual. Contact Millipore SAS for these instructions if you would like to see them before obtaining the Pack Holder.
W
HEN DO
I
CHANGE THE
P
RE
P
AK
?
It is recommended to change the PrePak when the Progard TL is changed. See “When do I change the Progard TL?” (the section
above) for more information.
P
RE
P
AK
C
ATALOGUE
N
UMBER AND
P
ACK
H
OLDER
C
ATALOGUE
N
UMBER
See Sections 6-1 and 6-2.
P
URGE
V
ALVE
The Purge Valve is used whenever the Progard TL is removed from the front of the Elix System.
The Purge Valve is opened during a “Pack Change” Mode. When it is open, air will flow through it. The entering air allows any
water in the Progard TL to flow into the Elix System and then to drain. This allows a wetted Progard TL to be emptied of water.
This prevents water from flowing out of the Progard TL when it is removed from the Elix System.
F
EEDWATER
P
RESSURE
S
WITCH
The Feedwater Pressure Switch is a sensor that detects if there is not sufficient water pressure after the Progard TL. When the
water pressure after the Progard TL is < 0.3 bar for ~ 10 seconds, the Elix System will report a LOW FEED PRESSURE Alarm. This
alarm closes the Inlet Solenoid Valve and the Elix System will shut down.
The Feedwater Pressure Switch is used to determine if the Progard TL is clogged or if the supply of feedwater is turned off.
F
EEDWATER AND
P
ERMEATE
C
ONDUCTIVITY
C
ELLS
A Conductivity Cell is a sensor used to measure the electrical conductance of water. The electrical conductivity (electrical
conductance per unit length) is directly related to the amount of ions in the water. Higher conductivity values indicate a higher
ion content in the water passing through the sensor.
The Feedwater Conductivity Cell is located after the Progard TL and before the RO Cartridge(s). The Permeate Conductivity Cell is
located after the RO Cartridge(s).
A comparison between the Feedwater and Permeate Conductivity Cell measurements is done while the Elix System is operating.
This information is used to calculate the RO % Rejection. This indicates the relative percentage of ions removed from the
Feedwater (“rejected by the RO”).
