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2. Operation and Maintenance
• Control Mode:
• Supply air (default):
The cooling control strategy will be based off the temperature of the discharge air.
• Return air:
The cooling control strategy will be based off the temperature of the entering air.
Note:
If the load is lower than 30% of rated cooling capacity, which may cause frequent In-Row Cooler on/off cycling, it is
recommended to set Control Mode to “Return Air.” Otherwise, set Control Mode to “Supply Air.”
•
Restart delay time:
Restart delay after restoring power. If power is lost, the In-Row Cooler will automatically restart after
this delay time.
Set up group control to ensure redundancy if there is a cooling fault or to balance run hours to ensure average run hours
across all In-Row Coolers is similar:
• Standby Unit IP:
The IP address of the standby air conditioner. The master In-Row Cooler will send commands to this IP
address. If configured as a standby In-Row Cooler, an IP address is not needed.
• This Unit:
Designates whether the In-Row Cooler is a master or standby In-Row Cooler. Each standby In-Row Cooler must
have a corresponding master.
• Master Control:
Recommended setting is “Enabled.” When enabled, this means the standby In-Row Cooler will be running
the same control modes as the master to prevent demand fighting. Control modes are: cooling and dehumidifying.
• Rotation Time:
Number of days each In-Row Cooler should operate until rotating to the next one.
• Rotation:
When enabled, this means after the rotation time expires, the master In-Row Cooler will stand by and the existing
standby In-Row Cooler will resume. This helps balance the run hours between each In-Row Cooler.
Note:
In-Row coolers will not rotate if the heat load demands additional cooling.
• Force On:
When enabled, if the master In-Row Cooler issues an alarm, it will force the standby In-Row Cooler to function,
regardless of the rotation configuration.
• Group Unit Quantity:
Used to set the total size (number of In-Row Coolers) of the group.
• Standby Unit Quantity:
Use to set the number of “redundant” In-Row coolers within the group reserved for standby.
• Monitor:
This is the In-Row Cooler MODBUS address used for the DCIM.
