SilentMaster Products | Central Vacuum Parts Silent, Yet Effective. The aptly named Silent Master is a force to be reckoned with in the vacuuming industry. While its motor may not make much noise while operating, which is a good thing, the Silent Master central vacuum system provides great cleaning power and utmost ease to its owners.[PDF] Model SK-5208 - Silent knight The Model SK-5208 is an 24-volt 10-zone fire alarm control panel (expandable up to 30 zones using SK-5217 Zone Expanders) with a digital communicator that meets NFPA 72 requirements. The SK-5208 cabinet can be surface mounted or semi-flush mounted. ® GENIE SILENTMAX 1000 3042 OPERATION AND MAINTENANCE View and Download Genie SILENTMAX 1000 3042 operation and maintenance manual online. Genie Garage Door Opener. SILENTMAX 1000 3042 Garage Door Opener pdf manual download. Also for: Silentmax 1200 4042.