Reznor MASA Unit Installation Manual - Manual (Page 3)

Form I-COND, P/N 220746R6, Page 3
DANGER
This condensing unit is designed to use R-410A high pressure
refrigerant only. Hazards exist that could result in personal
injury or death. Installation, maintenance, and service should
only be performed by an HVAC technician qualified in R-
410A refrigerant and using proper tools and equipment. Due
to much higher pressure of R-410A refrigerant, DO NOT USE
service equipment or tools designed for R22 refrigerant.
WARNING
Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, personal injury, or
death. A qualified installer or service agency must perform
installation and service.
1.0 General 1.1 Hazard Labels and Notices
There are warning labels on the condensing unit and throughout this manual.
For your safety, read the definitions below and comply with all boxes labeled
CAUTION, WARNING, and DANGER during installation, operation, mainte-
nance, and service of this system.
Definitions of Hazard Intensity Levels in this Manual
HAZARD INTENSITY LEVELS
DANGER: Failure to comply will result in severe personal injury
or death and/or property damage.
WARNING: Failure to comply could result in severe personal
injury or death and/or property damage.
CAUTION: Failure to comply could result in minor personal
injury and/or property damage.
DANGER
Never use oxygen to pressurize a refrigeration system.
Oxygen can explode on contact with oil and result in
personal injury or death. When using high pressure gas
such as nitrogen for pressurizing a refrigeration system,
ALWAYS USE A PRESSURE REGULATOR that can control
the pressure down to 1 or 2 psig.
SAFETY WARNINGS
For your safety, wear eye protection, gloves, and protective
clothing when handling R-410A refrigerant or POE oil
and when brazing. Have a fire extinguisher nearby when
brazing.