1. Do NOT pull on Safety Relief Valve! (i.e. this valuve has the ring attached) as this will permanently damage the safety relief/pressure valve if used too often to bleed air out of tank. Majority of California Air Compressor Safety Relief valves will automatically open at ~140 PSI. Pressure Pot relief valves open at ~80 PSI.  Only use the manual ball drain valve or your tool to remove air from the tank. 'AD' Units equipped with an Automatic Drain Valve will evacuate air on a regular basis. 

2. Do NOT Hot Plug the unit! (i.e. pull power cord from wall receptacle and then plug into another receptacle). This will permanently damage the motor-pump assembly.

3. Remove water from the tank on a regular basis! Not doing so can cause inadequate pressure problems. 

4. Do NOT pull on power cord or air hose to move your unit around! This can damage the electrical connections and/or allow air to leak from air hose/coupler fittings. 

5. Avoid connecting air compressor to Remote Power Switches! Only California Air Tool models equipped with an electronic unloader valve are safer for these types of applications otherwise permanent motor-pump damage may occur. All California Air Tool products are not designed for unattended operation (i.e. during working hours and with personnel present).

6. It is suggested to add Teflon tape to Air Hose threads! (i.e. remove Industrial Male 1/4 NPT and Industrial Female 1/4 NPT couplers from your air hose and add Teflon tape to 3/8" threads - this help prevent air leaks). 

7. Do NOT operate any California Air Tool unit in Severe Elements! This includes outdoors in the rain, below freezing (32F), excessive heat environments (i.e. >90F), high-dust & particle environments. Generally units should operate below 85F (when used for long periods of time) otherwise motor-pump overheating could occur and the internal motor-pump's thermal fuse may suddently shutoff the unit off for ~10-15 minutes. 

8. Do NOT exceed unit's rated Duty Cycle! I.E. Motor-pumps on all 1 Hp and 2 Hp units should not be allowed to continuously operate for more than 30-40 minutes (where you hear the motor-pump running the whole time), otherwise permanent motor-pump damage may eventually occur. 

9. Do NOT operate unit on it's side! Generally all California Air Tool units need to operate vertically, with no more than a 15 degree tilt with respect to gravity. Remember most units have 2 large pistons that move up and down rapidly inside the motor. 

10. Avoid connecting unit to GFCI electrical outlet! Some GFCI receptacles (found in most newer or upgraded homes today) can interfere with air compressor unit function; switch to another electrical outlet if this occurs. 

11. Do NOT use unit with extension cords greater than 25' in length! Ensure you have a proper cord gauge rating (i.e. 10/12/14) and unit is properly grounded. 

12. Do NOT remove or replace Industrial Female fitting as this will void your warranty. The Air Compressors Female fitting (or fittings) is attached with high-grade locktite to the manifold and can only be removed using a Heat Gun. For servicing personnel only!

13. California Air Tools is the only air compressor manufacture that includes an Easy Start Valve on 2 Hp Air Compressors and above. 
The Easy Start Valve blows air during startup (2, 4 & 6 Hp models). The valve will blow and release air from motor-pump for 2 to 15  seconds on average - this is NORMAL. The purpose is to reduce Amp (current) draw for easier air compressor start which helps prevent a breaker from tripping. TIP 1: Ensure Ball Drain Valve is closed or air will continue to blow out of easy start valve. TIP 2: On 220 volt models if voltage is too low (i.e. less than 210 volts) then start valve may continuously blow air. See Video below: