Installation Guide
 Page 3
Safety Precautions
mrcool.com
Read Before Using
Incorrect usage may cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
CAUTION
WARNING
DO NOT share the electrical circuit with other appliances. Improper or insufficient power supply 
can cause fire or electrical shock.
When connecting refrigerant piping, 
DO NOT let substances or gases other than the refrigerant 
enter the unit. The presence of other gases or substances will lower the unit’s capacity, and may 
cause abnormally high pressure in the operation cycle. This may cause explosion and injury. 
DO NOT allow children to play with the air conditioner. Children should be supervised around the 
unit at all times.
1. Installation must be performed according to installation instructions. Improper installation may 
cause water leakage, electrical shock, fire, or may void the warranty. 
2. In North America, service or repair must be performed in accordance with the requirement of 
NEC and CEC (by authorized personnel or authority having jurisdiction only.) Contact an 
authorized service technician for repair or maintenance of the unit.
3.  Only use the included accessories and specified parts for installation. Using non-standard parts 
can cause water leakage, electrical shock, or fire and may cause the unit to fail.
4. Install the unit in a firm location that can support the unit’s weight. If the installation location 
cannot support the weight, or the installation is performed improperly, the unit may fall and 
cause serious injury and/or damage.
5. For all electrical work, follow all appropriate wiring standards, regulations, and the Installation 
Manual.
6. You must use an independent circuit to supply power. Do not connect other appliances to the 
same circuit. Insufficient electrical capacity or defects in electrical work can cause electrical 
shock or fire. 
This symbol indicates ignoring instructions may cause death or serious injury.
This symbol indicates that ignoring instructions may cause moderate injury
to your person, damage to your unit, or other property.
This symbol indicates that you should NEVER perform the indicated action. 
!
Safety Precautions
Installing the MRCOOL DIY multi-zone does not require specialized tools or training. It does require basic 
technical skills. You are assuming the risk by handling materials containing refrigerants under pressure including 
that if not handled properly, refrigerant can cause bodily injury. If you do not feel comfortable conducting this 
installation process yourself, we recommend you retain the services of a qualified HVAC professional. 










