JOHNSON CONTROLS
145
SECTION 7 – MAINTENANCE
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
7
Dry Storage Method
The dry storage method should be used if the chilled
water, cooling water, and/or the hot water system may
freeze in the winter or, if the chilled water, cooling wa-
ter, and/or hot water system has a lining tube. Do not
simply drain the chilled water, cooling water, and hot
water and store the machine. This significantly increas-
es the possibility of corrosion of the heat transfer tube
and rust. For details, see Table 32 on page 146.
The dry storage procedure is as follows if the chilled
water, cooling water, and/or the hot water line is an
open system:
1. Completely drain the water.
2. Clean the water systems by passing clear water
through the tubes 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.
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