Installation Procedure - 3M CUNO CFS5400 Instrucciones De Instalación Y Operación

The CFS5400 system with blending capability is designed to reduce hardness caused by calcium and
magnesium minerals in point of use beverage applications such as brewed tea machines. The
CFS5400N system is designed to provide complete hardness reduction when required.
The CFS5400 & CFS5400N systems will require an external shut-off valve installed before the system. A
drain valve should be installed after the system for routine maintenance. A flush kit can be purchased
separately if a drain valve is not desired. See the 3M Water Filtration Products price list for part number
and price. The housing comes with a pressure relief valve and 1" inlet/outlet ports. 3/8" reducer
bushings, mounting bracket and wrench are supplied.

Installation Procedure

Note: Read instructions all the way through before attempting to install the filter system. Observe
all installation precautions.
The filter systems can be adapted to various pipe sizes by using reducing bushings at either end. The
filter system has 1" NPT ports. 3/8" NPT reducer bushings are supplied if needed.
Filter System Assembly:
1. Turn off incoming water line.
2. Mount bracket onto filter head. Use mounting holes provided to mount the system to a wall or
support structure.
3. Install a shut-off valve on the incoming cold water supply line.
4. Connect the incoming cold water supply to the filter system's inlet water connection.
5. Connect the outlet port of the system to the outlet water line.
6. Install drain valve on the outlet water line. Note: If flush kit is used, follow instructions supplied
for assembly.
7. After all connections are complete, unscrew sump from filter head and remove o-ring (Gasket)
from bottom of sump and place on top of sump. If unit comes with cartridge installed, o-ring
(Gasket) should already be installed. Install cartridge, referring to the cartridge replacement
instructions, if necessary.
8. Turn on incoming water to the system.
9. Pressurize system. Check for leaks. Retighten connections if necessary. Flush a minimum of 1
gallon of water through new cartridge to remove entrapped air.
10. System is now ready for service.
Cartridge Replacement Instructions
The CFS5400/CFS5400N Systems are designed to use only the 3M Water Filtration Products CFS5400C
replacement cartridge. Use of housings and replacement cartridges other than those specified below
may seriously compromise water quality and/or cartridge life.
Note: The CFS5400C cartridge has a grain capacity of 4,200 grains. When used in the CFS5400
system, gallon throughput will increase by 25% or better, dependent upon incoming
hardness levels. When used in the CFS5400N system, the system will provide complete
softening for 4,200 grains.
1. Turn off incoming water supply.
2. Depress pressure relief button on top of filter head to relieve pressure in filter.
3. Unscrew sump from filter head. Empty water from sump and dispose of spent cartridge.
4. Clean and inspect all components including the o-ring seal. Lubricate o-ring seals with a light
coating of food grade lubricant. Replace o-ring seal if there is visible damage.
5. Install new cartridge into sump.
6. Place lubricated o-ring onto sump groove. Screw sump into head. Tighten with the wrench
provided (p/n 68900-33). After approximately 1 turn, additional resistance will be felt as gasket
engages with head. Continue turning until sump becomes snug and cartridge is sealed.
7. Turn on incoming water supply.
8. Depress pressure relief button on filter head until air is purged from system. Flush a minimum of 1
gallon of water through new cartridge prior to service to remove entrapped air.