Engineering Manual
MULTI
F
MAX
MULTI
F
,QVWDOODWLRQDQG%HVW/D\RXW3UDFWLFHV
DUCT (HIGH STATIC) INDOOR UNITS
Checking the Drainage System
Remove the air filter.
Check the drainage.
• Spray water on the evaporator.
• Verify that water flows through the indoor unit drain hose without leaking.
)LJXUHChecking the Drainage System.
Pour Water
Drain Pump
Drain Pan
Flexible drain hose
(accessory)
Field-Installed
Drain Piping
Glue the Joint
Drain
Port
Drain Hose Connection
Use the clip (accessory)
Checking the Drain Pump
The unit uses a drain pump to remove condensate. The pump must be tested before the
system operates.
• &RQQHFWILHOGVXSSOLHGIOH[LEOHGUDLQKRVHWRWKHILHOGLQVWDOOHGGUDLQSLSLQJOHDYHLWDV
is until the test is complete.
• Pour water into the flexible drain hose and check for leaks.
• After power wiring installation is complete, operate the drain pump to see if it sounds
and functions properly.
• After the test is complete, connect the flexible drain hose to the indoor unit drain port.
)LJXUH Insulating the Piping.
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be prop-
erly and completely covered in insulation (up to the indoor unit piping
connections). Any exposed piping may generate condensate or will
cause burns if touched. Insulation for this field-installed refrigerant
SLSLQJPXVWKDYHDPLQLPXPKHDWUHVLVWDQFHRI)
Drain Piping Insulation
'UDLQSLSLQJPXVWKDYHLQVXODWLRQDPLQLPXPRILQFKHVWKLFN
)LJXUHChecking the drain pump.
Liquid Piping
Connection
Insulation for Refrigerant Piping
(Field-Supplied)
Vapor Piping Connection
Insulation
(Field-Supplied)
Clamp for Insulation
(Field-Supplied)
Ensure no gaps are present.
Overlap the Insulation at the
Connection
Insulation for Refrigerant Piping
(Field-Supplied)
Insulation for Field-Installed Piping
(Field-Supplied)
Insulating the Refrigerant and Drain Piping
Ensure all piping is insulated. Exposed piping can cause burns if touched.
DUCT (HIGH STATIC) | 115
Ceiling-Concealed Duct (High Static)
'XHWRRXUSROLF\RIFRQWLQXRXVSURGXFWLQQRYDWLRQVRPHVSHFL¿FDWLRQVPD\FKDQJHZLWKRXWQRWL¿FDWLRQ
©/*(OHFWURQLFV86$,QF(QJOHZRRG&OLIIV1-$OOULJKWVUHVHUYHG³/*´LVDUHJLVWHUHGWUDGHPDUNRI/*&RUS