Specifications

InRow RC Operation and Maintenance14
Control the Environment
The InRow RC utilizes a chilled water coil, a valve to modulate fluid flow through the chilled water coil,
and a set of fans to control airflow through the coil. The control strategies employed by the cooling unit
depend upon the deployment strategy of the cooling group.
In an In-Row environment, the InRow RC supplies constant-temperature supply air to the common cold
aisle. The fan speed is modulated to ensure that the required volume of air reaches the IT equipment.
In a HACS or RACS environment, the InRow RC neutralizes the heat accumulated in the common hot
aisle and expels it back into the environment after the heat is neutralized while maintaining the required
temperature gradient across the group.
Setpoints
Path: Main > Set Group Setpoints
A setpoint is the target value that a cooling group will maintain in the environment. The default setpoints
are appropriate for most cooling applications.
Cool. Set the temperature that the cooling group should maintain. The setpoint must be within
18.0-25.0°C (64.4–77.0°F).
Supply Air. The setpoint must be within 17.0–23.0°C (62.6–73.4°F).
• For an In-Row rack deployment strategy, the required temperature of the common cold aisle.
• For a HACS or RACS deployment strategy, the required temperature of the air expelled into the
surrounding environment.
Note: The Supply Air setting is defined by the field service representative when the
cooling group is commissioned.
Fan Spd. Set the fan speed preference for the cooling group. Each fan speed provides an approximate
temperature difference (DT) between the supply air from the equipment and the air returned from the
environment.
Note: The cooling group will automatically override this fan speed setting and adjust the fan
speed to provide optimum cooling for the environment as needed.
• Low = 16.7°C (30°F) DT
• Med-Low = 13.9°C (25°F) DT
• Med = 11.1°C (20°F) DT
• Med-High = 6.3°C (15°F) DT
• High = 5.6°C (10°F) DT