ClimaCool UCA Manual - Manual (Page 21)

21
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Chiller Pre-Startup Procedures
1.
Turn selector switches inside the module starter/control
panel (low voltage side) to the off position. For future
reference write the circuit number and power panel
identifi cation inside of the module control panel with a
permanent marker.
2. Ensure the correct fuses are installed in the control
transformer fuse blocks inside of each ClimaCool
module. Turn on the power to each module (indicated
by the “power” light turning on)
3. Override the CoolLogic Control System outputs to the
compressors.
• Within the “Service Menu” of the CoolLogic Control
System index to the “Diagnostics Manual Mode”
section to engage the compressors individually for
startup purposes.
• Index to the “M1 Manual Mode” prompt so the
cursor is at the “Off ” prompt to the right. Press
“Enter.”
• Use the increment key so that the “Off ” prompt
changes to “On” and then press “Enter” or the
“OK” key.
• Index down to the “M1C1 Manual Mode On”
prompt so the cursor is at the “Off ” prompt to the
right. Press “Enter.”
• Use the increment key so that the “Off ” prompt
changes to “On” and then press “Enter” or the
“OK” key.
• Inside the module’s low voltage control section
(left-most control door), you will fi nd two toggle
switches, one marked “Compressor 1” and one
marked “Compressor 2”. Turn the Compressor 1
switch ON to bump compressor 1 and check for
proper rotation using pressure gauges.
• Once this is complete and correct rotation is
verifi ed, turn the compressor 1 switch off and
reverse the manual mode for M1C1 compressor so it
is “Off ” by similar prompts as outlined above.
• Use this same technique to manually override the
M1C2 compressor to the “On” state.
• Turn on the switch marked “Compressor 2” to
bump the compressor and verify that circuit 2
compressor has correct rotation.
Always use proper electrical safety precautions.
4. Slowly close the chiller water inlet isolating valve and
note that the pressure diff erential fl ow sensor or switch
stops the machine. Note the fl ow rate at which this
occurs. If too much fl ow is lost before the chiller is
stopped, reset switch setting. The pressure diff erential
fl ow switch should be set so the chiller shuts down
when the fl ow rate to each evaporator water circuit
drops below 60% of rated ARI full-load conditions
(indicating a 10°F temperature change through the
evaporator heat exchanger).
5. Repeat the tests of all other safety interlocks which may
be connected.
6. The temperature sensor at the evaporator outlet for
each module should be set to stop the compressors
from operating when the leaving chilled water
temperature drops below 38°F.
WARNING
This unit contains HFC-(R410A), an azeotropic mixture of R-32 (Difluoromethane) and R-125 (Pentafluoroethane).
DO NOT VENT HFC-(R410A) to the atmosphere. The U.S. Clean Air Act requires the recovery of any residual
refrigerant. Do not use R-22 service equipment or components on R410A systems.
WARNING!
WARNING! To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and secure it
in an open position during installation.
CAUTION!
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.