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Electrical Data
Transfer back to the grid
Proper transfer of power from the standby generator to the grid is essential to prevent damage to the chiller and must be used to ensure
proper operation of the unit.
Stop the chiller before transferring power from the generator to the mains. Transferring power while the chiller is running can cause
serious damage to the chiller.
The procedure required to reconnect generator power to the mains is as follows:
1. Set the generator to always run five minutes longer than the unit start timer, which can be set from two to sixty minutes, while keeping
the chiller powered by the generator until the fully synchronized Automatic Transfer Switch properly delivers chiller power from the
site.
2. Set the transfer switch supplied with the generator to automatically shut down the chiller before the transfer is made. The automatic
shutdown function can be accomplished through a BAS interface or with the "remote on/off" wiring connection shown in the field
wiring diagrams. A start signal can be given at any time after the stop signal, as the three-minute start timer will be in effect.
Electric shock danger. Improper handling of this equipment can cause personal injury or equipment damage. This equipment must
be properly grounded. Control panel connections and maintenance should be performed only by personnel knowledgeable in the
operation of the equipment being controlled. Disconnect electrical power before servicing equipment. Be sure to install a earth
leakage breaker. Failure to install a earth leakage breaker may result in electric shock or fire.
When installing the earth leakage protector make sure that it is compatible with the inverter (resistant to high frequency electrical
noise) to avoid unnecessary opening of the earth leakage protector.
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