Chapter 1: Introduction
During startup, the fans begin operating in stages with
Use the system controller to configure the fans for zone temperature control with independently variable fan speeds or with all three fans operating at the same variable speed (See Section 4.4.4).
1.5.7 Temperature/Humidity Sensors
Control and alarm recognition takes place by means of the controller analyzing signal inputs from the sensors to manage the operation of the A/C unit consistent with the setpoints entered in the system controller. The system controller monitors three
The NTC sensors are factory installed in predetermined supply air fan zones inside the cabinet. Each NTC sensor is used by the sys- tem controller to manage the speed of the fan for that zone to meet the supply air setpoint temperature. The return air is moni- tored by a temperature/humidity (T/H) sensor that is typically mounted inside the cabinet. As an option, you can remove the return air T/H sensor from the cabinet and mount it in the hot aisle. View the actual sensor values from the controller user interface display using the Information menu loop.
1.6 Optional Equipment
1.6.1 Remote Mounted Supply Temperature/Humidity Sensor
As an option, a supply T/H sensor may be provided for field installation (see Section 2.6.2). This is to be mounted in the supply (cold aisle) space for monitoring or control purposes. Refer to the electrical drawing supplied with your unit for wiring details specific to your system.
1.6.2 Water Detector
As an option, Black Box offers
1.6.3 Smoke Detector
Optionally mounted in the return air side of the cabinet, a
1.6.4 Firestat
Optionally mounted in the return air side of the cabinet, a fire detector senses high return air temperature and signals the controller when a fire alarm condition exists and shuts down the air conditioner.
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