Cooling System and Airflow in ACX7024 and ACX7024X Routers
The cooling system in an ACX7024 and ACX7024X router consists of six system fans. When a system fan (single or multiple) fails, a chassis alarm is raised and the fan(s) need to be replaced. In case of a single fan failure, the router continues to operate with the remaining fans according to GR-3108 specifications. However, if multiple fans fail, it requires immediate replacement of the fans.
The system fans in an ACX7024 and ACX7024X router are fixed and cannot be replaced at your site. You must return the router to Juniper Networks for repair or replacement of the fans (see Returning an ACX7024 or ACX7024X Chassis or Components).
1 — System fans |
The ACX7024 and ACX7024X routers support only front-to-back airflow (airflow out or AFO). In AFO models, the device pulls in airthrough the front of the chassis toward the system fans, from where it exhausts the air out of the chassis. Figure 2 shows the airflow direction in an ACX7024 and ACX7024X router.
Leave at least 6 in. (15.2 cm) clearance each at the front and rear of the chassis for airflow and to accommodate the interface and power cable bend radius.
