Installation Manual

Page 13 mrcool.com
Indoor Unit Installation
Be extremely careful not to dent or damage the piping while bending them away from the unit.
Any dents in the piping will affect the unit’s performance.
Step 4: Prepare refrigerant piping
The refrigerant piping is inside an insulating sleeve
attached to the back of the unit. You must prepare
the piping before passing it through the hole in the
wall. Refer to the Refrigerant Piping Connection
section of this manual for detailed instructions on
pipe flaring and flare torque requirements,
technique, etc.
Based on the position of the wall hole
relative to the mounting plate, choose the
side from which the piping will exit the unit.
If the wall hole is behind the unit, keep the
knock-out panel in place. If the wall hole is to the
side of the indoor unit, remove the plastic
knock-out panel from that side of the unit. (See
Fig. 4.4 ). This will create a slot through which
your piping can exit the unit. Use needle nose
pliers if the plastic panel is too difficult remove
by hand.
Use scissors to cut down the length of the insulating
sleeve to reveal about 6 in (15 cm) of the refrigerant
piping. This serves two purposes:
• To facilitate the Refrigerant Piping
Connection process
• To facilitate Gas Leak Checks and enable
you to check for dents
If existing connective piping is already embedded
in the wall, proceed directly to the Connect
Drain Hose step. If there is no embedded
piping, connect the indoor unit’s refrigerant
piping to the connective piping that will join the
indoor and outdoor units. Refer to the
Refrigerant Piping Connection section of this
manual for detailed instructions.
Based on the position of the wall hole relative to
the mounting plate, determine the necessary
angle of your piping.
Grip the refrigerant piping at the base of the
bend.
Slowly, with even pressure, bend the piping
towards the hole. DO NOT dent or damage the
piping during the process.
NOTE ON PIPING ANGLE
Refrigerant piping can exit the indoor unit
from four different angles:
• Left-hand side
• Left rear
• Right-hand side
• Right rear
Refer to Fig. 4.5 for details.
Knock-out Panel
Fig. 4.4
Fig. 4.5
1.
2.
3.
4.
5.
6.
7.