York YHAU-CGH, Установка, эксплуатация и обслуживание, Страница: 151 / 182

FORM 155.32-ICOM2.EN.UL SECTION 7 – MAINTENANCE
ISSUE DATE:1/10/2018
JOHNSON CONTROLS 151
WET STORAGE METHOD
The wet storage method may be used when there is no concern about water freezing in
winter. Store the machine in a place where the ambient temperature will remain higher than
32°F (0°C).
If it is likely that the temperature will drop below 32°F (0°C), provide a heater for the
machine. If a heater is not possible, contact your local Johnson Controls service center for
further information. For details on the wet storage method, see
Wet Storage Method on
page 151 .
The wet storage procedure is as follows if either chilled/hot line or the cooling water line is
an open system:
1. Completely drain the water from the systems if it has deteriorated in quality.
2. Clean the water systems by passing clear water through them from a position higher
than the chiller-heater.
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.
6. Completely fill the water systems with clear water again.
7. Store the machine.
DRY STORAGE METHOD
The dry storage method should be used if the chilled/hot water system or the cooling water
system may freeze in the winter or, if the water system has a lining tube.
The dry storage procedure is as follows if either the chilled/hot line or the cooling water 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-heater.
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 accessible or near a construction site. If
this is unavoidable, provide the machine with protection.
If it is not possible to protect the machine, fill the interior with N2 to minimize the amount of
air leakage. For details, contact your local Johnson Controls service center.
NOTE: Do not simply drain the chilled/hot, and the cooling water and store the ma-
chine. This significantly increases the possibility of corrosion of the heat transfer tube
and rust.