MARLO MR-210-2 - General Softener Operation

MR 150M–1050M SINGLE – MXIII CONTROLLER
OPERATION
13
GENERAL SOFTENER OPERATION
Hard water passes through the valve manifold into the top of the softener tank. It ows downward through the mineral
bed and out through the bottom of the tank to service. As the water passes through the mineral bed, the hardness
present is removed through the process of ion exchange and at the same time sediment present is removed by
ltration action of the mineral. Once the mineral has extracted all the hardness it can, it must be regenerated and have
its capacity restored by the following procedure:
SERVICE
1. Service – Hard water enters the softener, is treated and exits the system.
REGENERATION
2. Backwash: The ow through the mineral bed is reversed and allowed to ow to drain. The up-ow action washes
any sediment or foreign material collected in the unit out to drain. At the same time the mineral itself is restratied,
thereby eliminating any possibility of channeling (approximately 10 minutes).
3. Brine Draw: The ow through the unit is returned to down-ow to drain at a slow controlled rate and during the rst
stage of this step the brine is injected to react with the mineral and restore its softening capacity (approximately
20 minutes).
4. Slow Rinse: The ow through the unit is a slow ow of water to rinse all of the exchanged hardness and salt from
the unit (approximately 40 minutes).
5. Fast Flush: The downward ow to drain in this step is increased to a high rate which will repack the mineral bed
and remove the last traces of salt and hardness from the regenerated equipment just before its return to service
(approximately 6 minutes)
HOW THE STAGER FUNCTIONS
The regeneration of the equipment provided is carried out through the redirection of ow through the valve manifold.
This manifold consists of individual diaphragm valves, which are controlled by the hydraulic stager mounted at the
bottom of the stager controller. The stager applies or relieves water pressure to close or open valves as required.
When water pressure is applied to the top of a diaphragm valve, it forces a diaphragm in causing it to close the seat
assembly. When pressure is relieved from the top of the valve, by venting it to drain through the stager, the water
pressure under the diaphragm forces it out thereby opening the seat assembly.
Note: If stager somehow gets out of sequence either:
• Rotate thumb wheel in direction of arrow.
• Be patient, unit will return to service position and be in sequence within 2 hours.