Use and Care Manual
Page 36mrcool.com
Refrigerant Piping Connection
Make sure to arrange the drain hose correctly according 
to Fig. 7.3a.
DO NOT kink the drain hose.
DO NOT create a water trap.
DO  NOT  put the end  of the  drain  hose in  water  or a 
container that will collect water. 
ENSURE UNUSED DRAIN HOLE IS PLUGGED
As shown in Fig. 7.4, there are two drain 
holes on the indoor unit: one on the left, 
and one on the right. The unit arrives with 
the drain hose connected to the left hole 
and a hollow center rubber plug in the 
right. Connect the drain hose to the drain 
hole that best works for your installation 
location. To prevent unwanted leaks, be 
sure that the plug is installed in the unused 
drain hole. The plug is depicted in the right 
hole in the figure.
Fig. 7.3a
Fig. 7.3b
Fig. 7.3c
Fig. 7.3d 
Make sure there are NO
kinks or dents in the 
hose to ensure proper 
drainage.
NOT CORRECT
DENTS  in the drain hose 
will create water traps.
NOT CORRECT
KINKS   in the drain hose 
will create water traps.
NOT CORRECT
DO NOT place the end 
of the drain hose in 
water or in containers 
that collect water. 
This will prevent 
proper drainage.
In this step you will connect the drain hose extension to 
the drain hose exiting from the indoor unit that is within 
the piping bundle you wrapped in the previous steps.
1. Securely connect the drain hose extension to the
drain piping from the indoor unit.
2. Using example Fig. 6.3a as a guide, make sure your 
drain pipe is run in a similar manner. The other 
examples in Fig 6.3 represent things you should 
avoid when installing your drain pipe.
3. Remove the air filter from the indoor unit and pour a 
small amount of water across the coils to test the 
drain pan. Ensure that the water exits the bottom of 
the unit and flows through the drain and drain pipe 
smoothly. 
Step 7: Connect Drain Pipe
CAUTION
Fig. 7.4










