ClimaCool SHC onDEMAND 30, 50, 70, 85 Manual - Manual (Page 17)

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‹ŽŽ‹‰–Š‡ƒ–‡”›•–‡
It is imperative that the water systems are free from
debris prior to initial operation. See Water Treatment for a
comprehensive list of precautions on page 16.
‹ŽŽ‹‰ǡ—”‰‹‰ƒ†‡ƒ‡•–‹‰–Š‡›•–‡
After the water systems have been properly installed,
visually inspect all joints for tightness. If the chiller is to be
installed in an existing system, the cleanliness of the existing
system can be judged from the operating conditions of the
present machines. The cooling tower in particular, should
be inspected and cleaned, if required. It is a good practice
–‘ƪ—•Šƒ†ǡ‹†‡ƒŽŽ›ǡ–‘ƒ ‹†™ƒ•Š–Š‡‡š‹•–‹‰•›•–‡before
connecting a new chiller.
Š‡ˆ‘ŽŽ‘™‹‰‡–Š‘†‹•”‡ ‘‡†‡†–‘ƤŽŽƒ†Ž‡ƒ Š‡ 
the water system:
1. Close all water isolation valves inside each module
which isolate the individual heat exchangers.
2. Ensure that all drain valves are closed and that all water
main isolation valves are opened.
3. Š‡•›•–‡•Š‘—Ž†„‡ƤŽŽ‡†™‹–Š Ž‡ƒ™ƒ–‡”•‡–
through the strainers and the system checked for leaks.
4. Once the main water lines and the chiller headers are
ƤŽŽ‡†™‹–Š Ž‡ƒ™ƒ–‡”ǡ’—”‰‡ƒ†”‡’‡ƒ––Š‡ƤŽŽ‹‰
process at least three times.
5. ŽŽ‘†—Ž‡•ƒ”‡‡“—‹’’‡†™‹–ŠΧdzƤŽŽƒ†ƪ—•Š˜ƒŽ˜‡•
with lines teed into the inlet and outlet connections into
and out of each heat exchanger. Ensure these ¾” valves
are CLOSED.
6. Open the water isolation valves inside each modular
Š‹ŽŽ‡”ƒ†”‡’‡ƒ––Š‡ƤŽŽ‹‰’”‘ ‡••ǡ–Š‹•–‹‡ƒŽ•‘
checking for leaks inside each module.
7. ‘ŽŽ‘™‹‰–Š‡ƤƒŽƤŽŽ‹‰ƒ†Ž‡ƒ Š‡ ‹‰’”‘ ‡†—”‡ǡ
air should be purged from the system.
Ž‡ƒ‹‰–Š‡›•–‡
The following method is recommended to properly clean
the water systems:
1. Before cleaning the system, install a temporary
bypass line between the main supply and return water
headers of both chilled and condenser water systems
when possible. Open the main header bypass lines to
†‹˜‡”––Š‡‹‹–‹ƒŽ™ƒ–‡”ƪ‘™ƒ”‘—†–Š‡‘†—Ž‡Š‡ƒ–
‡š Šƒ‰‡”•—–‹Ž›‘—ƒ”‡ ‘Ƥ†‡––Š‡ ‹” —Žƒ–‹‰™ƒ–‡”
is mostly pure.
2. Provided main header bypass lines are installed, close
all water isolation valves inside all modular chillers.
3. It is mandatory to run the pumps with the strainers in
place (see Starting the Pumps section for proper pump
startup). All external hydronic branches should be open
to all devices in the system.
4. Pressure drop across the strainer must be observed
and as pressure change reaches 50% of the initial read,
strainers must be isolated and cleaned.
5. Open all water isolation valves inside each module. Close
‘ơ–Š‡ƒ‹Š‡ƒ†‡”„›’ƒ••Ž‹‡•”‡ˆ‡””‡†–‘‹•–‡’͕ƒ†
‘’‡–Š‡ƪ‘™–‘–Š‡ƒ‹™ƒ–‡”Š‡ƒ†‡”•Ǥ‡’‡ƒ–•–‡’•
3 and 4 until there is no more debris being collected by
the strainers.
–ƒ”–‹‰–Š‡—’•
Follow the manufacturer’s recommendations when starting
–Š‡’—’•ˆ‘”–Š‡Ƥ”•––‹‡ǤŠ‡•›•–‡•Š‘—Ž†„‡ Š‡ ‡†
for leaks and air purged with the pumps in operation. The
pressure drop across the heat exchangers will give a good
‹†‹ ƒ–‹‘‘ˆƪ‘™–Š”‘—‰Š–Š‡•›•–‡ȋ‡‡‘†‡•‡”
and Evaporator Water Pressure Drop Charts on page 18).
This should be immediately checked against the expected
’”‡••—”‡†”‘’ˆ‘”–Š‡ƪ‘™”ƒ–‡”‡“—‹”‡†ǤIf the pressure
†”‘’„‡‰‹•–‘ˆƒŽŽƒ†–Š‡ƪ‘™”ƒ–‡‹•ˆƒŽŽ‹‰ǡ–Š‹• ‘—Ž†
indicate the need to clean the strainers.