Thermal Care Accuchiller KSE, Operation, Installation, And Maintenance Manual

24 

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. Use a qualified refrigeration technician to 
perform 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 or without power 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. Energize main power at least 
24 hours prior to startup. 

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 for a minimum of 24 hours prior to 
startup. 
 

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