Table 3: Chemical Specification Of Water - York YLAA0041 Installation Operation & Maintenance

Form 150.72-ICOM6
Issue date: 12/19/2023
Specification of water
• Prevent particles such as silt, pipe slag, and bio-
logical matter from entering the unit to prevent
the water side channels in a BPHE from clogging.
These matters may block the channels, causing
bad performance and increased pressure drop.
Under extreme conditions, they may lead to the
BPHE freezing.
• Properly flush the piping system to clean out the
debris and particles generated in the piping weld-
ing and process before the BPHE is connected.
• Strainers can prevent the BPHE from blocking.
If any of the media contains particles larger than
1 mm, use a strainer with a size 40 mesh at the
upstream of the BPHE.

Table 3: Chemical specification of water

WATER CONTENT
Alkalinity (HCO ³-)
Sulfate (SO42-)
HCO3- / SO42-
Electrical Conductivity
pH
Ammonium (NH4+)
Chlorides (Cl-)
Free Chlorine (Cl²)
Oxygen
Hydrogen Sulfide (H²S)
Free Carbon Dioxide (CO²)
Total Hardness (odH)
Nitrate (NO³-)
Iron (Fe)
Aluminum (Al)
Manganese (Mn)
Johnson Controls
• Back flushing is an ideal method to clear out
the blockage. Contact a professional company
if a chemical cleaning to the BPHE is required.
Chemical cleaning is one of the high risks of
BPHE corrosion, because any chemical corrosion
will void the warranty.
• Do not allow muddy water to be used in this chill-
er.
• Check the chemical specification of water in the
following table for chemical consideration.
CONCENTRATION
UNIT
(mg/l or ppm)
ppm
ppm
—
μS/cm
—
ppm
ppm
mg/L
mg/L
mg/L
mg/L
mg/L
ppm
mg/L
mg/L
mg/L
(analyze before)
70–300 Within 24 hrs
< 70
> 1.0
10–500
7.5–10 Within 24 hrs
< 2 Within 24 hrs
< 100
< 1
< 0.02
< 0.05
< 5
4.0–8.5
< 100
< 0.2
< 0.2
< 0.1
Section 4: Installation
4
TIME LIMIT
No Limit
No Limit
No Limit
No Limit
Within 5 hrs
Within 5 hrs
No Limit
No Limit
No Limit
No Limit
No Limit
No Limit
No Limit
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