Use and Care Manual
2
(14). When installing or repairing the system, be sure to keep the refrigerant circuit free from
substances other than the specied refrigerant (R410A), such as air. (Any presence of air or other
foreign substances in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in
injury.)
(15). During vacuum pump operation, stop the compressor before removing the refrigerant piping. If the
compressor is still running and the stop valve is open during vacuum pump operation, air
will be sucked in when the refrigerant piping is removed. There will be abnormal
pressure in the refrigeration circuit, which may cause damage or injury
(16). During installation, attach the refrigerant piping securely before running the compressor.
Compressor is not attached and the stop valve is open during pump-down, air will be sucked in,
causing abnormal pressure in the refrigeration circuit which may cause damage or injury.
(17).
Be sure to establish an earth ground. Do not earth ground the unit to a utility pipe, arrester, or telephone earth ground.
Incomplete earth ground may cause electric shock, or re. A high surge current from lightning or other
sources may cause damage to the air conditioner.
(18).
Be sure to install an earth ground leakage or GFI breaker. Failure to install an earth ground
leakage or GFI breaker may result in electric shocks, or re.
(19). This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
(20). Children should be supervised to ensure that they do not play with the appliance.
(1).
Do not install the air conditioner in a place where inflammable gas is stored.
(2). Install drain piping according to the instructions of this manual. Inadequate piping may cause
overflowing and property damage.
(3). Tighten the are nut according to the specied method with a torque wrench. If the are
nut is over tighten, the are connection may fail over time and cause refrigerant leakage.
U-match Series Cassette Type Unit