Exterior Wall Mounted Cooling Unit (3)

Marvair The CommStat 4 is designed specifically for controlling two 

redundant air conditioners, heat pumps, air conditioners with two stage 

compressors and air conditioners with gas heat in a telecommunications 

shelter or enclosure. In addition to the control of the air conditioners or

heat pumps, the CommStat 4 has multiple outputs for remote alarms 

or notification. The CommStat 4 is factory programmed with standard 

industry set points, but can be configured on site. Settings are retained 

indefinitely in the event of a power loss.

➤ Ease of Control and Configuration A large, backlit LCD display shows 

the status of the system and provides a convenient user interface. Status 

LEDs indicate Heat, Cool, Power and the Lead Unit. When a fault is detected, 

an alarm LED flashes and the LCD screen displays the fault. If multiple faults 

are detected, the display will scroll the faults across the screen. The CommStat 4 

is easily configured with four buttons. A Comfort button changes the temperature

in the shelter for 90 minutes. After 90 minutes, the temperature reverts back 

to the programmed set points. A lead swap button alternates the lead and lag unit, 

allowing service techs to quickly check the operation of each unit. For security, 

the keypad can be locked out to prevent unwanted changes to the set points. 

English, Spanish or French is selectable as the language shown on the display. 

°F or °C is selectable. 

➤ RoHS Compliant The CommStat 4 controller contains no hazardous materials and is RoHS compliant