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2)
WATER METER
INITIATED: 5 Basic Metered Systems:
a)
1 tank-1
meter- immediate regeneration-hard water by-pass during regeneration has
no bearing on system. No
reserve capacity required.
b)
1 tank-1
meter-delayed regeneration-hard water by-pass during regeneration must be
at low usage time. 1 day
capacity reserve required.
c)
System
#5- 2 tanks-2 meters-Both units in service at the same time; only 1 can
regenerate at a time (lockout). Can be designed with immediate or delayed
regeneration, hard water by-pass or no hard water by-pass.
Delayed regeneration should have a 1-day reserve.
d)
System #6-2
tanks-1 meter –Both units in service at the same time. Once meter zeroes
out, #1 unit regenerates, then #2 regenerates. (Series regeneration)
Can be designed with immediate or delayed regeneration, hard water
by-pass, or no hard water by-pass. Delayed regeneration should have 1-day
reserve.
e)
System
#7- 2 tanks –1 meter- One unit in service, one unit fresh and
ready on standby, (also, referred to as Alternators).
Systems are usually designed with no hard water by-pass and with
immediate regeneration. 3-hour meter reset reserve capacity needed.
System #7 may be
ordered as a tri-plex or quad-plex. This
will allow 2 or 3 units to be in service at all times, with 1 unit on
standby. These systems are of
particular value when access to the location of installation is limited.
Also, these will afford much greater flow rates, without the
expense and handling of very large tanks.
Metered systems are
best suited for erratic, unpredictable water usages. Twin systems both in
service at the same time are usually used when high peak flows are needed.
Alternator systems are used where soft water must be available at all
times.
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