II.
COMMISSIONING PROCEDURES
A. Pre-start Operations
1. Holding Charge
psig. Must be positive pressure or leak test must be done.
2. Before relieving the holding charge, calibrate the H.P.C. high-pressure control
This is a check of pressure to the H.P.C. as well as calibration of the control.
Disconnect and cap the flare. Calibrate H.P.C. and reconnect flare.
Relieve the holding charge.
Check and if necessary, tighten all connections per proper specs.
3. Megohm the Motor (500 volt Meggar)
Compressor motor Megohms - refer to temp/resistance chart for acceptable values. Remove surge suppres-
sors before Megging. Never Meg test with the unit in a vacuum.
T1 to Earth T4 to Earth T1 to T2 T1 to T4
T2 to Earth T5 to Earth T1 to T3 T2 to T5
T3 to Earth T6 to Earth T2 to T3 T3 to T6
4. Evacuation
Connect the vacuum pump to start evacuation. Use a 2-stage pump with at least 5 CFM capacity. Connect to
the evaporator-charging valve with a hose no smaller than 3/4 inch ID.
a. For the IT Cutler-Hammer Solid State Starter it is necessary to shut off all power to the unit prior to evac-
uating the chiller. The IT starter has terminals 4, 5, & 6 hot when the unit is off. Failure to shut off power to
the chiller, with the vacuum pump hook up, will cause a motor failure.
5. Condenser
Isolation and flow valves installed
Calibrated thermometers and pressure gauges installed in/out condenser on machine side of any valve or
elbow.
If condenser pump controlled by control panel, is field wiring correct and complete?
Condenser pump(s) run, system and strainers properly cleaned and/or flushed.
Condenser water strainer in close proximity to entering connection of condenser.
Previsions installed to properly maintain water treatment additives.
Initial water treatment added to system
Flow or differential pressure switch installed and where possible, wired in series with auxiliary of pump mo-
tor starter. Verify correct operation of flow proving circuit.
Condenser water flow balance.
PSID design GPM design
PSID actual GPM actual
6. Evaporator
psig. Must be positive pressure or leak test must be done.
Calibrated thermometers and pressure gauges installed in/out of evaporator on machine side of any valve or
elbow.
If the evaporator pump controlled by the control panel, is field wiring correct and complete?
Evaporator pump(s) run 24 hrs. System and strainers properly cleaned and/or flushed.
Evaporator water strainer in close proximity to entering connection of evaporator.
Provisions installed to properly maintain water treatment additives.
Initial water treatment added to system.
Flow or differential pressure switch installed and where possible, wired in series with auxiliary of pump mo-
TCVHE-SVX04D-EN 79
Forms
RELEASED 10/Mar/2020 06:59:20 GMT
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