From inside (document excerpt):
50JZ A Single Packaged Heat Pump System With Puron (R 410A) Refrigerant 50Hz, CE 7 14kW (Sizes 24 48) Owner’s Information Manual A09042 Fig. 1 – Unit 50JZ- A – NOTE TO EQUIPMENT OWNER: For your convenience, please record the model and serial numbers of your new equipment in the spaces provided. This information, along with the installation data and dealer contact information, will be helpful should your system require maintenance or service.
UNIT INFORMATION Model # _ Serial # __ ACCESSORIES (List type and model #) INSTALLATION INFORMATION Date Installed __ DEALERSHIP CONTACT INFORMATION Company Name _ Address __ Phone Number _ Technician Name __ NOTE TO INSTALLER: This manual must be left with the equipment owner. 1 SAFETY CONSIDERATIONS Improper installation adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes, the current editions of the National Electrical Code (NEC) NFPA 70. In Canada refer to the current editions of the Canadian electrical Code CSA C22.1. Recognize safety information. This is the safety-alert symbol. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and CAUTION.