State SUF and Forc 90+ - Manual (Page 2)

2
condensate neutralizing solution – Installation, Operation & Maintenance
overview
condensate neutralizing solution (cns) increase pH
(reduce acidity).
CNS residential and commercial flue-side neutralizing tubes are
designed to raise the pH level of the condensate discharged by
high-efficiency boilers and water heaters.
Each change of 1.0 in pH is a 10-times reduction (or increase)
in concentration. The pH of condensate is increased by
approximately 1.0 to 3.0 after passing through CNS tubes. (This
is a change in concentration of from 10 to 30 times.)
What is pH?
The pH measurement of a fluid is an indicator of the acidity
or alkalinity. Neutral fluids have pH of 7.0. Acid fluids have pH
below 7.0. And alkaline fluids have pH above 7.0 (up to 14.0).
The pH can be easily measured using litmus paper contained in
a pool PH test kit.
Condensate from condensing boilers and water heaters is
typically around 4.0 (slightly acidic). The condensate needs to
be increased (made more neutral) to prevent possible damage
to cast iron soil pipe, ABS pipe, septic tanks, plants, wastewater
treatment plants and other materials handling waste water.
Figure 1 CNS Tubes – features and dimensions
A
B
C
D
F
E
Top
1
2
3 6
4
5
5
4
5
4
5
Left side
End view
Features ratings & dimensions (in inches)
Item description Model MBH gpH a B c d e F
1 PVC tubing filled with 1/2” and 3/4” aggregate calcium carbonate CNS-2 200 2 15 2 ¾ 3 ⅞ N/A 2 ¼ 2 ¼
2 Channel strut mounts CNS-6 600 6 14 ¼ 4 6 10 ¾ 3 ½ 2 ½
3 Galvanized strut clamps, bolts and nuts CNS-10 1,000 10 19 4 6 16 ⅛ 3 ½ 2 ½
4 Condensate outlet hose barb fitting
3/4” hose barb x 1/2” NPT
CNS-20 2,000 20 19 ½ 5 6 16 ⅛ 4 ½ 3 ⅛
5 Condensate inlet hose barb fitting CNS-30 3,000 30 24 ½ 5 6 21 4 ½ 3 ⅛
6 Plugged – alternate location for condensate inlet hose barb fitting
applying cns tubes
Condensate can be collected from flueways and boiler/water
heater condensate trap outlets. Use 1 CNS per condensate drain
tube for each connection. DO NOT combine condensate lines
from flueways with those from boiler/water heater condensate
traps. Match the CNS to the Boiler/Water Heater MBH ratings
(see Ratings and Dimensions chart). Locate the CNS tube
below the condensate connection and slightly above the floor
drain or inlet to a condensate pump reservoir (if used).
Follow the guidelines in this manual, the boiler/water heater
manual and all applicable local codes when installing, using and
maintaining CNS tubes.