ClimaCool UCR 30, 50 and 70 tons Manual - Manual (Page 38)

www.climacoolcorp.com
38
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 module control panel with a
permanent marker.
2. Ensure the correct fuses are installed in the control
transformer fuse blocks inside each ClimaCool module.
Turn on the power to each module. The “Power” light
should be on.
3. Override the CoolLogic Master Control Panel outputs
to the compressors. Within the “Service Menu” of
the CoolLogic Master Control Panel 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 the “Off ” prompt changes to “On”
and then press “Enter”, or press the “OK” key. Index
down to the “MC1 Manual Mode On” prompt so the
cursor is at the “Off ” prompt to the right. Press “Enter”.
Use the increment key so the “Off ” prompt changes
to “On” and then press “Enter”, or press 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 switch stops the
machine. Note the fl ow rate at which this occurs. If too
muchfl ow is lost before 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 anti-freeze 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.