JOHNSON CONTROLS
151
SECTION 7 – MAINTENANCE
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
7
Dry Storage Method
The dry storage method should be used if the chilled or
cooling water system may freeze in the winter or, if the
chilled or cooling water system has a lining tube. Do
not simply drain the chilled or cooling water and store
the machine. This significantly increases the possibil-
ity of corrosion of the heat transfer tube and rust. For
details, see
The dry storage procedure is as follows if either the
chilled water line or the cooling line is an open system:
1. Completely drain the water.
2. Clean the water systems by passing clear water
through them from a position higher than the
chiller.
3. Fill the water systems with clear water.
4. Circulate the clear water through the water pump
for 30 minutes to one hour to clean it.
5. Drain the water from each waterbox.
6. Dry the interior of each waterbox and the heat
transfer tube.
7. Store the machine.
PRECAUTIONS AGAINST EXTERNAL
DAMAGE
Avoid storing the machine in a place that is easily ac-
cessible or near a construction site. If this is unavoid-
able, provide the machine with protection.
If it is not possible to protect the machine, fill the in-
terior with N2 to minimize the amount of air leakage.
For details, contact your local Johnson Controls ser-
vice center.
