5
1.
Assure the main power source is connected properly, that it matches the voltage shown on the nameplate of the unit,
and that it is within the voltage utilization range given in Table 1. Electrical phase sequence must be checked at
installation and prior to start-up for three-phase systems. Operation of the compressor with incorrect electrical phase
sequencing will result in mechanical damage to the compressors. The phasing must be checked with a phase sequence
meter prior to applying power. The proper sequence should read “ABC” on the meter. If the meter reads “CBA”, open
the main power disconnect and switch two line leads on the line power terminal blocks (or the unit mounted
disconnect). All components requiring electric power are wired in-phase at the factory. Do not interchange any load
leads that are from the unit contactors or the motor terminals. Once proper power connection and grounding have
been confirmed, turn the main power on.
WARNING: Disconnect main power while working inside electrical enclosure or cabinet. Electrical shock or sudden start of
mechanical components may result in severe injury or death.
WARNING: It is imperative that L1-L2-L3 are connected in the A-B-C phase sequence to prevent equipment damage due to
reverse rotation.
Note: If chiller is equipped with a compressor crankcase heater, the main power must be on for 24 hours prior to starting the compressor to allow the
crankcase heater to sufficiently vaporize any liquid refrigerant that may be present in the compressor.
2.
Check to make sure that all process chilled water piping connections are secure. Open the cabinet and fill the chilled
water reservoir with the proper water or water/glycol solution. See Table 4 for recommended glycol solutions. 25%
glycol is recommended even if running at temperatures higher than 25°F to help protect the evaporator from potential
freezing. Use glycol with a corrosion inhibitor only. The external sight glass located at back of unit may also be used to
fill or drain tank.
Table 4 - Recommended Glycol Solutions
Chilled Water Temperature
Percent Glycol By Volume
50°F (10°C)
Not required
45°F (7.2°C)
5 %
40°F (4.4°C)
10 %
35°F (1.7°C)
15 %
30°F (-1.1°C)
20 %
25°F (-3.9°C)
25 %
20°F (-6.7°C)
30 %
15°F (-9.4°C)
35 %
10°F (-12.2°C)
35 %
5°F (-15°C)
40 %
0°F (-17.8°C)
40 %
3.
(EQ2W02 and EQ2W03 only) Check the condenser water lines to make sure all connections are secure. Make sure
sufficient condenser water flow and pressure are available, the condenser water supply is turned on, and all shut-off
valves are opened.
4.
(EQR Models Only) Check the refrigerant lines to make sure all connections are secure and that a proper evacuation of
the chiller, the field piping, and the remote condenser has occured.
5.
Charge the chiller with refrigerant. For EQR chillers, please refer to the EQR Series Chiller Remote Air-Cooled Condenser
Installation Guidelines Manual to determine the required refrigerant charge. EQA and EQW chillers come factory
charged and should require no additional refrigerant.
6.
(EQR Models Only) Check the remote condenser main power and control wiring to ensure all connections are secure.
7.
Verify that any existing refrigerant valves are open. Most units as standard contain no refrigerant valves.
CAUTION: Do not operate the unit with the compressor or liquid line service valves “CLOSED”. Failure to have these “OPEN”
may cause serious compressor damage.