ClimaCool UCA 20, Инструкция по установке, эксплуатации и обслуживанию

Страница: 38 / 92

R
R
www.climacoolcorp.com
36
Draining
When performing standard maintenance procedures
•— Šƒ•ƪ—•Š‹‰ƒŠ‡ƒ–‡š Šƒ‰‡”ǡ‹–™‹ŽŽ„‡‡ ‡••ƒ”›–‘
Ž‘•‡‘ơƒ•‡ –‹‘‘ˆƒ‘†—Ž‡ǤŠ‹• ƒ‡ƒ•‹Ž›„‡†‘‡
if factory mounted water isolation valves are provided.
‡••–‘ƒƪ‘‘”†”ƒ‹‹•Š‡Ž’ˆ—Ž™Š‡’‡”ˆ‘”‹‰•–ƒ†ƒ”†
maintenance procedures.
Back Washing
It may become evident from the recorded weekly log data
that the performance of the chiller is gradually degrading.
This could be due to a buildup of debris or sludge obstructing
–Š‡ˆ”‡‡’ƒ••ƒ‰‡‘ˆƪ‘™–Š”‘—‰Š–Š‡Š‡ƒ–‡š Šƒ‰‡”•ǤŠ‹•
debris can be removed by a back washing process which
‹˜‘Ž˜‡•–Š‡‹–”‘†— –‹‘‘ˆƒˆ‘” ‡†˜‹‘Ž‡–„ƒ ™ƒ”†•ƪ‘™
through the heat exchanger using a carefully formulated
ƪ—•Š‹‰•‘Ž—–‹‘Ǥ‘„‡‡ơ‡ –‹˜‡ǡ–Š‹•„ƒ ƪ‘™•Š‘—Ž†„‡
•Ž‹‰Š–Ž›Š‹‰Š‡”–Šƒ–Š‡‘”ƒŽƪ‘™ǡƒ†‹–Š‡‘’’‘•‹–‡
†‹”‡ –‹‘ǤŠ‡†‹ƥ —Ž–‹‡•ƒ†’”ƒ –‹ ƒŽ‹–›‘ˆ–Š‹•‡–Š‘†
depends on the back wash pumping system itself. Another
‡–Š‘†‹•–‘„ƒ ƪ—•Š‡ƒ ŠŠ‡ƒ–‡š Šƒ‰‡”—•‹‰ ‹–›™ƒ–‡”
as opposed to system water (see Figure 25 on page 36 – City
Water Cleaning Arrangement). The back washing procedure
is accomplished by isolating each individual heat exchanger
and introducing the city water using a connection hose to
–Š‡͗Ȁ͘dz•‡”˜‹ ‡’‘”––‘ƪ‘™‹ƒ‘’’‘•‹–‡†‹”‡ –‹‘ˆ”‘
–Š‡‘”ƒŽŠ‡ƒ–‡š Šƒ‰‡”ƪ‘™†‹”‡ –‹‘Ǥ–Š‡‘’’‘•‹–‡
͗Ȁ͘dz•‡”˜‹ ‡’‘”–ǡ ‘‡ –ƒ†”ƒ‹Š‘•‡ ‘–‹—‹‰„ƒ ƪ‘™
until all debris is removed. Warning: Water valves must be
”‡Ǧ‘’‡‡†ƒˆ–‡”ƪ—•Š‹‰‹• ‘’Ž‡–‡Ǥ
Chemical Clean In Place Washing Without Water
Isolation Valves
Chemical Clean in place washing will typically provide
the best debris removal, even from severely clogged
heat exchangers. In order to clean the heat exchangers
for modules
WITHOUT water isolation valves, it will be
necessary to mechanically and electrically isolate each
module separately from the bank of modules. The rest of the
chiller modules will need to be disabled during this cleaning
’”‘ ‡†—”‡ƒ•–Š‡ƪ‘™–Š”‘—‰Š–Š‡ƒ‹„ƒŠ‡ƒ†‡”™‹ŽŽ
be interrupted. The cleaning tank, pump and pump strainer
should be arranged in the manner shown in Figure 26 on
’ƒ‰‡͚͗ǦŽƒ ‡Ž‡ƒ‹‰””ƒ‰‡‡–ǤŠ‡ƪ‘™‘ˆ–Š‡
Ž‡ƒ‹‰‹•ƒ””ƒ‰‡†‹–Š‡‘’’‘•‹–‡ƪ‘™–‘–Š‡‘”ƒŽ
operational direction. Connection points are provided
using the 3/4” service ports at each heat exchanger. The
cleaning solution used can be either a detergent or hot
water to remove particles and simple cleaning. If correct
water treatment has been implemented, this should provide
adequate cleaning for most situations. The solution can be
pumped through the heat exchangers and allowed to “soak”
for a time and then pumped again. Upon successful cleaning
of a module, proceed to isolate a second module separately
from the bank and repeat the cleaning process.
Chemical Clean In Place Washing With Water
Isolation Valves
Chemical Clean in place washing will typically provide
the best debris removal, even from severely clogged
heat exchangers. It is only necessary to mechanically and
electrically isolate one chiller module at a time. The rest of
the chiller modules can continue to operate to satisfy the
cooling load required. The cleaning tank, pump and pump
strainer should be arranged in the manner shown in Figure
͖͚‘’ƒ‰‡͚͗ǦŽƒ ‡Ž‡ƒ‹‰””ƒ‰‡‡–ǤŠ‡ƪ‘™‘ˆ
–Š‡ Ž‡ƒ‹‰‹•ƒ””ƒ‰‡†‹–Š‡‘’’‘•‹–‡ƪ‘™–‘–Š‡‘”ƒŽ
operational direction. Connection points are provided
using the 3/4” service ports at each heat exchanger. The
cleaning solution used can be either a detergent or hot
water to remove particles and simple cleaning. If correct
water treatment has been implemented, this should provide
adequate cleaning for most situations. The solution can be
pumped through the heat exchangers and allowed to “soak”
for a time and then pumped again.
If it is required to remove carbonates, then an acidic wash
is recommended. A 2% solution of phosphoric or sulfamic
acids in pure water are generally acceptable. These acid
solutions should only be allowed to circulate within the heat
exchanger for 10 to 15 minutes, followed by a thorough pure
™ƒ–‡”ƪ—•Šˆ‘”͕͔–‘͕͙‹—–‡•Ǥ Hydrochloric or sulfuric
acids must not be used. In any case, consult the chemical
supplier to establish the correct formulation and handling
process. The materials, which will be exposed to the wash,
are stated on page 23 – Water Treatment.
 ‡–Š‡™ƒ•Š‹‰‹• ‘’Ž‡–‡ǡ–Š‡•‘Ž—–‹‘•Š‘—Ž†„‡ƪ—•Š‡†
out completely by pumping clean, fresh water through the
chiller. To achieve a reasonable level of dilution, it may be
required to change the water several times. After cleaning,
the water quality and water treatment should
„‡ ‘Ƥ”‡†Ǥ
Heat Exchangers