Water Treatment Requirements - Trane CXAJ065 Installation, Operation And Maintenance Manual

Unit Installation
Installation of Main Outlet Water
Temperature Probe
1. The main outlet water temperature probe shall
be placed at 2m or more away from the outlet to
ensure that the outlet water temperature is evenly
mixed.
2. The main outlet water temperature probe sleeve
shall be 9.52mmcopper pipe, shall be inserted into
the water pipe at the depth of 2/3 of the diameter
of the water pipe, and shall be installed above the
water pipe.
3. After the insertion of the main outlet water
temperature probe, the sleeve shall be filled with
heat transfer silicone and covered with waterproof
materials to prevent water from entering the sleeve.
Auxiliary Electric Heating of Waterway
(installed by user)
When the unit heats, if the outlet water temperature
is less than the set value of 10℃ , the electric heating
will be turned on; when the outlet water temperature
is more than or equal to the set value minus 6℃ , the
electric heating will be turned off.

Water Treatment Requirements

Filth, dirt, grease and other impurities will have
an adverse impact on the heat exchange effect of
heat exchanger and the unit performance. Foreign
substances in the chilled water will increase the water
pressure drop of the heat exchanger, reduce the water
flow and cause the blockage or mechanical damage of
the heat exchanger.
Please test in strict accordance with the water quality
requirements of the unit water system to ensure
that the water quality of the water system meets the
requirements in the table.
18
Allowable
Item Unit
Value
PH（25℃） 7.5-8.0
SO4-- ppm ＜ 100
HCO3-/SO4-- ppm ＞ 1.0
Cl- ppm ＜ 50
PO4 ppm ＜ 2.0
NH3 ppm ＜ 0.5
Free Chlorine ppm ＜ 0.5
Fe+++ ppm ＜ 0.5
Mn+++ ppm ＜ 0.05
CO2 ppm ＜ 10
H2S ppm ＜ 50
Temperature ＜ 65
℃
Oxygen content ppm ＜ 0.1
Total hardness dH 4.8-8.5
 D
Notices
1. Before and during the installation of the unit, the
user shall regularly test the water quality to ensure
that the water quality meets the requirements in
the above table. Once the water quality exceeds the
allowable value for a long time, the heat exchanger
may cause corrosion, leakage and serious scaling;
2. The items with corrosion tendency indicate that if
the water quality exceeds the allowable value for a
long time, it may cause the corrosion and leakage of
heat exchange tubes, which will prevent the normal
operation of the unit and affect its normal use;
3. The items with scaling tendency indicate that if
the water quality exceeds the allowable value for
a long time, it may cause the severe scaling in the
heat exchanger, which will affect heat transfer and
directly decrease the cooling(heating) effect of the
unit;
4. Losses caused by the water quality problems of
users shall be borne by users.
Tendency
Corrosion Scaling
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PKGP-SVX18B-EN