HOW CAN I OBTAIN FREE INSTRUCTION MANUAL FOR HOMELAND SECURITY CAMERA, MODEL#4821 ?

notify manufacturer

Depends on how much wire you have left to work with?

Look here


https://searchmanuals.net/search7/?keyword=%2Bowners+%2Bmanual&gclid=CjwKCAiA8OjjBRB4EiwAMZe6y5_84V3ek15m17m45ZjUS8CJGN8CDmLdMHFmDUai5BTqkctyGuc0KBoCV8sQAvD_BwE

Is the camera water proof

try mauritron.com

Use the USB backup port to backup to an external hard drive and then plug that drive into your PC.

my search did not help, not enough info to do a good search. model numbers may help. the camera number does get info but nothing on the company. you can just get another dvr security system less the cameras and connect these cameras to it and start over. i did that few time just in doing upgrades. the cameras are mostly universal anyway just make sure you connections are the same from the camera to the dvr. sorry i can't help more. but not enough info for a good search. good luck. try ebay for dvr systems for the head unit.
https://www.ebay.com/itm/4CH-Channel-Full-1080N-720P-AHD-DVR-HVR-NVR-HD-2000TVL-CCTV-Security-System-E1V2-/142413186437?epid=28003888764&hash=item21287cc585:g:lCsAAOSwa-dWsC9Y
try this.

They have good listings on their web site.
http://www.rheem.com/product.aspx?id=8B064EC5-B708-4821-9F2B-DEF3A2243F90
That link should be to your model. When you click on the link for your manual (installation instructions)l, if it doesn't download. Right click on the link, and select download
So what is the problem?

i have a homeland security camera with monitor , a philps tv and a jvc vcr .. how do I hook up monitor to view and record off tv

If you provide an email I can send you scanned copies of the manual pages.