15
Start-Up
Every unit is factory set to deliver chilled water in
accordance with the standard operating
specifications for that particular chiller. Due to
variables involved with different applications and
different installations, minor adjustments may be
required during the initial start-up to ensure proper
operation. We recommend a qualified refrigeration
technician perform the start-up and that they follow
the start-up procedure in sequence. The following
serves as a checklist for the initial start-up and for
subsequent start-ups if the chiller is out of service
for a prolonged time.
WARNING: This equipment contains hazardous
voltages that can cause severe injury or death.
WARNING: This equipment contains refrigerant
under pressure. Accidental release of refrigerant
under pressure can cause personal injury and or
property damage.
WARNING: This equipment may contain fan
blades or other sharp edges. Make sure all fan
guards and other protective shields are securely
in place.
WARNING: The exposed surfaces of motors,
refrigerant piping, and other fluid circuit
components can be very hot and can cause burns
if touched with unprotected hands.
CAUTION: Disconnect and lock out incoming
power before installing, servicing, or
maintaining the equipment. Connecting power to
the main terminal block energizes the entire
electric circuitry of the unit. Electric power at the
main disconnect should be shut off before
opening access panels for repair or maintenance.
CAUTION: Wear eye protection when installing,
maintaining, or repairing the equipment to
protect against any sparks, debris, or fluid leaks.
CAUTION: Wear protective gloves when
installing, maintaining, or repairing the
equipment to protect against any sparks, debris,
or fluid leaks.
CAUTION: Wire the unit ground in compliance
with local and national codes.
CAUTION: The unit requires the main power to
remain connected during off-hours to energize
the compressor’s crankcase heater. Disconnect
main power only when servicing the chiller. The
crankcase heater should remain on when the
compressor is off to ensure liquid refrigerant
does not accumulate in the compressor
crankcase. Connect main power at least 24 hours
prior to initial start-up.
Step 1 - Connect Main Power
Connect main power properly ensuring it matches
the voltage shown on the nameplate of the unit.
Check the electrical phase sequence prior to start-
up. Operation of the compressor with incorrect
electrical phase sequencing will cause damage to the
compressors. Check the phasing prior to applying
power. The proper sequence is “ABC”. If the phasing
is incorrect, open the main power disconnect and
switch two line leads on the main power terminal
blocks (or the unit mounted disconnect). All
electrical components are in-phase at the factory. Do
not interchange any load leads that are from the unit
contactors or the motor terminals. After making
proper power connection and grounding, turn the
main power on.
Step 2 - Fill Coolant Circuit
Check to make sure all process chilled-water piping
connections are secure. Open the chiller cabinet and
fill the coolant reservoir with the proper water or
water/glycol solution following the guidelines shown
below. When using a glycol solution only use glycol
with a corrosion inhibitor.
System Fill Water Chemistry Requirements
The properties of water make it ideal for heat
transfer applications. It is safe, non-flammable, non-
poisonous, easy to handle, widely available, and
inexpensive in most industrialized areas.
When using water as a heat transfer fluid it is
important to keep it within certain chemistry limits to
avoid unwanted side effects. Water is a “universal
solvent” because it can dissolve many solid
substances and absorb gases. As a result, water can
cause the corrosion of metals used in a cooling
system. Often water is in an open system (exposed
to air) and when the water evaporates, the dissolved
minerals remain in the process fluid. When the
concentration exceeds the solubility of some
minerals, scale forms. The life giving properties of
