Sterlco GC Series Central Chiller - Manual (Page 28)

GC Series Central Chillers Chapter 3: Installation 28 of 79
3-9 Initial Start-Up
• Check the shipping papers against the serial tag to be sure chiller size, type and voltage
is correct for the process that will be controlled. Central chillers are built with a
voltage specific compressor and cannot be re-wired for an alternate voltage.
• Check the transformer primary voltage connections to be sure they are configured for
the electrical power you are using. The voltage at the main power connection must read
within plus or minus ten percent (±10%) of the voltage listed on the serial tag.
Electrical connections must conform to all applicable codes.
• Complete chilled water To Process and From Process connections. Adjust the shut-off
valves provided with the unit to control the flow rate to process and for completely
isolating the chiller from the process.
Warning! Operating the chiller setpoint below 45°F (7°C) without the
proper amount of glycol for freeze protection could result in a
damaged evaporator. ACS Group does not warrant the freeze
up of the evaporator under any circumstances.
• The tower or city water condenser cooling in and out connections should be completed
and an adequate supply of 85ºF (30ºC) tower or 70ºF (21ºC) city water, at 25 psi (1.7
bar/0.17 MPa) pressure, for proper operation.
• Connect the main 3 phase incoming power to the unit making certain that line one (1)
L1 is connected to the A phase, line two (2) L2 is connected to the B phase, and line
three (3) L3 is connected to the C phase. Check for proper rotation direction of fan(s)
and pump(s). The best route for the main power wiring is from the floor up to the
right side of the enclosure on the top.
The crankcase heater is automatically energized when the main power is applied (main power
switch in the ON ( | )position. It should be on for at least 24 hours before startup to force
dissolved refrigerant from the compressor oil.
Finally, the cable for the basic display is coiled up under the control enclosure and the display
is shipped inside the control enclosure. Plug the cable into the back of the display.
Turn the power switch to the ON ( | ) position. The display’s backlight will turn on and the
controller will go through a self-diagnostic routine prior to displaying the main status screen.
3-10 Finishing Setup: Setting Up Passwords
You can establish passwords for two levels of security: operators and supervisors. The
controller comes from the factory with neither password set. This allows every user access to
all functions.
Warning! If you choose to establish passwords store them in a secure
location because if they are forgotten there is no way to reset them
without a service call.
Operator Password. If you define a password for operators, then a password will be
required to carry out any function (other than reviewing the status screens). Entering the
operator’s password will give the user access to the setpoints for leaving temperature, high
temperature warning, high temperature fault.