Precautions For Installation And Use - Carrier 39TF Manual

Precautions For Installation And Use

• Switch off the power supply when the unit doesn't operate for a long time or in winter.
• To avoid an electric shock, a fire and other possible injuries, always keep in mind the following rules and observe them:
• Never try to install or modify the A/C unit by yourself for improper operation (if any) may cause water leakage, electric shock
and fire.
• Never connect the grounding wire of the A/C to the gas pipe, tap water pipe, lightning rod, etc.
• Use the accessories specified by the company and ask the manufacturer or authorized dealer to provide installation and
technical services.
• Isolate the unit controller data line and the power supply line to avoid interference.
• Never damage the power supply line, and never turn on or off the A/C unit by plugging or unplugging the power supply.
• Never flush the A/C unit with water directly, otherwise, electric shock or other accidents may occur.
• Never try to repair by yourself for improper repair may cause operation fault or burnout to the unit; please contact the local
branch or authorized service provider if repair is needed.
• The air conditioning unit shall not operate in corrosive gas environment, for instance, acid, alkali, salt mist, etc. Otherwise, it
may lead to the damage to the unit enclosure, pipeline or electrical elements.
• The space around the unit shall be kept clean, dry and well-ventilated. In case the heat exchanger on the air side can be
cleaned regularly (at the interval of 1~2 months), its good heat transfer effect can be maintained and the energy can be saved.
• The drain pipe must be laid according to the requirements in the Instruction to ensure smooth water drainage and proper
measures for thermal insulation shall be taken to prevent the generation of condensate. The drain pipe must be inspected
before the unit operates. In case of blockage, foreign matters must be eliminated to ensure smooth drainage of the
condensate.
• The wiring of the power supply and the electrical system for the unit shall be inspected frequently to confirm whether the wiring
is firm, whether electrical elements operate abnormally. In case of abnormalities, cause(s) for the failure are investigated and
rectified. No forced startup shall be conducted before the cause(s) of failure are rectified.
• The minimum startup voltage of the unit must be kept above 90% of the rated voltage, the voltage during operation must
be within ±10% of the rated voltage and the voltage difference among all phases shall be within ±2%. Overvoltage or
undervoltage will have adverse effect on the unit. Stable power supply shall be guaranteed and in case of unstable voltage,
excessive current will be generated at the moment of unit startup for operation, and this may damage the unit motor.
• The unit maintenance and repair can only be conducted provided that the unit is shut down and it is disconnected with the
power supply.
• In case of unit failure, it can only be started after causes for the failure are identified and eliminated and no forced startup shall
be conducted before the failure is not eliminated.
AIR HANDLING UNIT
19
CARRIER