North Star NSC25ED Installation, Operation, Maintenance & Repair Parts page 4

SPECIFICATIONS AND PERFORMANCE CLAIMS
These models are efficiency rated. The efficiency rating is valid only at the minimum salt dose. These
softeners have a demand initiated regeneration (D.I.R.) feature that complies with specific performance
specifications intended to minimize the amount of regenerant brine and water used in their operation.
These softeners have a rated softener efficiency of not less than 3,350 grains of total hardness exchange
per pound of salt (based on sodium chloride) and shall not deliver more salt than their listed rating or be
operated at a sustained maximum service flow rate greater than their listed rating. These softeners have been
proven to deliver soft water for at least ten continuous minutes at the rated service flow rate. The rated salt
efficiency is measured by laboratory tests described in NSF/ANSI Standard 44. These tests represent the
maximum possible efficiency that the system can achieve. Operational efficiency is the actual efficiency after
the system has been installed. It is typically less than the rated efficiency, due to individual application factors
including water hardness, water usage, and other contaminants that reduce a softener's capacity.
RATED CAPACITY (grains @ lbs salt dose)
RATED EFFICIENCY (grains / lb @ lbs salt dose)
WATER USED DURING REGENERATION @ MINIMUM SALT DOSE (gallons)
TOTAL WATER USED PER REGENERATION @ MAXIMUM SALT DOSE (gallons)
AMOUNT OF HIGH CAPACITY RESIN (lbs / cu ft)
RESIN TANK NOMINAL SIZE (in., dia x height)
SERVICE FLOW RATE (gpm)
PRESSURE DROP AT RATED SERVICE FLOW (psig)
INTERMITTENT FLOW @ 15 psi (gpm)
WATER SUPPLY MAXIMUM HARDNESS (gpg)
WATER SUPPLY MAX. CLEAR WATER IRON (ppm) H
WATER PRESSURE LIMITS (min. / max. psi) F
WATER TEMPERATURE LIMITS (Min./Max. _F)
WATER SUPPLY MINIMUM FLOW RATE (gpm)
REGENERATION CYCLE FLOW RATES (gpm)
FILL (flow to brine tank)
BRINING
BRINE RINSE
MAX. BACKWASH
MAX. FAST RINSE
Intermittent flow rate does not represent the maximum service flow rate used for determining the softeners rated capacity and
Y
efficiency. Continuous operation at flow rates greater than the service flow rate may affect capacity and efficiency performance.
H Capacity to reduce clear water iron is substantiated by WQA test data. State of Wisconsin requires additional treatment if water
supply contains greater than 5 ppm clear water iron.
F Canada working pressure limits: 1.4 -- 7.0 kg/cm@.
These softeners conform to NSF/ANSI 44 for the specific performance claims as verified and substantiated by test data.
4
Y
(flow to drain)
MODELS NSC25ED & NST25ED
10,500 @ 2.1
22,200 @ 6.6
26,600 @ 11.2
5,000 @ 2.1
3.0 / 1,000 grains
32.4
36.4 / .70
8 x 40
6.0
10.4
7.5
70
7
20 -- 125
40 -- 120
3
.3
.15
.10
2.0
2.0