Switch settings: Set the circuit breaker to ON, then set the customers disconnection devices to ON.
Close all doors on the electrical panel with the handle engaged.
WARNING
The machine is now live.
Preparing with the power on
About this task:
Complete the steps in Preparing with the power off.
Crankcase heaters: Verify the heaters are energized.
CAUTION
Depending on the ambient temperature, the crankcase heaters must be on for 8 h before the first start-
up.
Water system: Verify that the liquid system has been correctly installed and has been
commissioned with the correct direction of water flow through the heat exchanger. Follow the
installation indicated by the arrows on the pipework. Purge air from the heat exchanger using the
air vent mounted in the pipework.
CAUTION
See Technical data for flow rate and pressure drop limits. Do not operate outside of these limits
because it could damage the unit.
Flow switch SFM: The flow switch is a standard offering for each individual module. All two-pipe
unit flow switches are factory-installed, and the four-pipe flow switch is loose shipped and field-
installed on the outlet water tube for each module. Verify a chilled-liquid flow switch is correctly
fitted in the customer’s pipework on the system outlet, and wired into the control panel correctly.
Temperature sensor BLST: Ensure the leaving liquid temperature sensors are coated with heat
conductive compound, part number 013-00898-000, and are inserted in the water outlet sensor
pockets of the system. This is applicable for modular systems only, such as modular arrays or multi-
module combination applications.
Programmed settings: Ensure the system cut-out and operational settings are in accordance with
operational requirements. See Unit operation.
Date and time: Set the date and time. See Setting the date and time.
Start or stop schedule: Program the daily and holiday start/stop. See Setting a schedule and
Setting a holiday.
Setpoints: Set the required leaving chilled or hot liquid temperature setpoint and control range.
See Setting the cooling and heating setpoints.
73YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump
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